Untitled record

Full description

Background of the invention

Unless otherwise stated, the solutions described in this section do not belong to the prior art according to the safeguards herein and their inclusion in this section does not constitute an acknowledgment that they are prior art.

The power requirements of modern electronic devices are increasing very rapidly; For example, devices

5 devices with large displays, Long Term Evolution (LTE) devices (radios, modems, etc.), multi-core processors, etc. To maintain acceptable operating times, these devices use high-capacity batteries. systems, battery charging times are often very long when conventional power sources are used. Reasons for this include:

<p dir="rtl">10 (1) Limited electrical power (Universal Serial Bus 5).</p>

Volts/1.1A max.)

<p dir="rtl">(2) High voltage problems between the input power source and the battery. Moreover, many readily available power supplies (e.g., monitors, laptops, etc.) cannot be used due to high voltage operation. 15 Voltage versus what the mobile device can handle.</p>

Implementing any solution that requires the use of a secondary mobile device connector significantly increases the cost of the solution and the cost to the consumer (proprietary connector, wall adapter, etc.).

<p dir="rtl">As battery capacities increase, the 5 V input does not provide sufficient voltage to achieve high enough charging currents due to impedances in the cable, connector 20</p>

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connector, printed circuit board (PCB), and charger. Many batteries now have a float voltage of 5.5 volts which makes this even worse, especially since the trend is towards using higher voltages. For example, the S2 array supplies around 1.5V or 1.8V, and therefore requires a voltage higher than 5V to charge efficiently.

5 General description of the invention

A circuit for charging a battery from an external device may include a circuit for detecting electrical configuration in the signal lines and including a cable for connecting the circuit to the external device. A configuration circuit can confirm the presence of one of several electrical configurations on signal lines in response to a detection circuit. In response, the external device 10 can supply voltage to a power line at a voltage level corresponding to the electrical configuration that has been confirmed

On signal lines.

In some models, the circuit operates according to USB battery charging specifications. The power line can be a voltage bus (VBUS) and the signal lines can be +D and -D lines as specified in the USB specification. The circuit can be 15 backward compatible with industry specifications, allowing With standard connectors and cables, while still allowing a wide range of operating voltages above the standard 5V operating level set forth in the USB specification.

The following detailed description and accompanying figures provide a better understanding of the nature and features of the present disclosure.

Brief explanation of the drawings

20 Figure 1 is a general high-level box diagram for electrical circuits according to the present disclosure.

Figures 1a and 1b show additional illustrative embodiments in accordance with the present disclosure.

Figure 2 is a high-level functional flow diagram of a processing process according to the present disclosure.

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Number form. Shows an illustrative example based on the USB specification.

Figure 5 shows an example of an external device.

Figure 5 shows a functional flow chart for processing in the mobile device shown in the figure

Figure No. 6 shows a functional flow chart for processing in the external device shown in Figure No

5 Figure 8 is a summary of a system operating in accordance with the present disclosure.

Detailed description:

Each of the preset electrical configurations can be accompanied by a preset voltage level. Just to illustrate this point, we provide the following example. Assume that the universal conductor 112 includes two universal conductor lines. The first electrical configuration that can

10 It has been asserted on the lines of the universal signal conductor. It can have a 1.5V assertion on one of the lines and. Volt on the other line. This configuration can be accompanied by a voltage level of, for example, 10 V. The second electrical configuration could be for shorting the lines of the first and second common signal conductors, and this configuration could be accompanied by a voltage level of, for example, 15 volts, and so on.

15 If circuit 100 requires 10 volts, electrical configuration circuitry 101 can confirm the presence of

20

The first electrical configuration is on the universal signal conductor 112. Likewise, if the circuit 100 requires 15 volts, the electrical configuration circuits 101 can confirm the presence of the second electrical configuration on the universal signal conductor 112, and so on. According to the principles of the present disclosure, the circuit 100 of the external device 15 can determine the voltage level it outputs when the external device can support multiple outputs by confirming the presence of a suitable electrical configuration on the common signal conductor lines that the external device can detect. These voltage levels are, of course, just to illustrate an example;

Specific voltage levels will depend on implementation, adherence to industry specifications, and other factors.

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In some embodiments, the electrical configuration confirmed on the universal signal conductor 112 may be detected by the external device 15 at block 210 A, and in response, the external device may adjust itself to output a voltage level corresponding to the electrical configuration detected. At box 212, the circuit can receive 100 voltages from the external device 15 at the specified voltage level 5. For example, circuit 100 can use the received voltage to charge a battery (such as 26, in Figure 1) or to provide power to a load (such as 101, in Figure 1).

An embodiment specified in accordance with the principles of the present disclosure may be included in a Universal Serial Bus (USB) interface (such as the USB Revision 2.0 specification) as shown in Fig. More specifically, the embodiment shown in Fig. 10 on a circuit model 100 based on USB (Revision 1.2, BC1.2) battery charging specifications.

The vast majority of devices are compatible with BC1.2, so this model can have desired benefits in terms of manufacturing and installed user base. Accordingly, in some embodiments, circuit 100 can operate in accordance with BC1.2, thus providing devices that are compatible with existing devices, easy to manufacture (because most electronic circuits have already been designed), 15 and provide the benefits of the present disclosure.

02. Mobile device can be connected to an external device 05. The mobile device can be 02.

Any electronic device that includes a USB interface; Such as a mobile communications device, digital camera, tablet, etc. Likewise, the external device 05. can be any electronic device that includes a USB interface and can provide power to the mobile device 20 02., including power supplies, battery chargers, or other electronic devices such as a computer,

And others.

02. The cable (such as cable 26, Fig. 1) that connects the mobile device 02. and the external device 05. electrically and mechanically may include four wires including a power line called a voltage bus (VBUS), a^{^}Universal signal connector +D, D-, and landline. These four wires are located in...

25 Standard USB A and USB B plugs (such as connectors 22 and 25, in Figure 1). Accordingly,

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The VBUS voltage bus is an example of the universal power conductor 115 and the universal power conductor 1.5 shown in Figure 1. Lines +D and –D are an example of signal lines including the universal signal conductor 112 and the universal signal conductor 1.2 shown in Figure 1.

In some embodiments, the portable device 02. may include a means of comparing the voltage that has been applied

5 Confirm it on the VBUS with the voltage level VOTG_SESSN_VLD. The comparator may be used to determine that communication has occurred with the external device 05.; Example, when the voltage level on the VBUS bus exceeds the VOTG_SESSN_VLD level.

The portable device 02 may contain detection circuits 12.a, 12.b, which give corresponding DCH_DET and CHG_DET signals. As previously explained with regard to the electrical detection circuits 10 105 shown in Figure 1, the electrical detection circuits 12.a, 12.b are in Figure 1.

Different electrical configurations can be detected on the +D and -D lines, as will be explained in more detail later.

22. A. It can contain voltage sources VDP_UP, VDP_SRC, resistor RDP_UP, VLGC_HI, current source IDP_SRC, IDP_SINK, and switches.

15 Corresponding to it for selective connection to the D+ line. 22. B Electrical configuration circuits may also contain RDM_DWN, VDM_SRC, VDM_UP, and IDM_SINK, and their corresponding switches for selective connection to the D-line. As previously explained in relation to the electrical configuration circuits 101 shown in Figure 1, the electrical configuration circuits 22.a, 22.b are in Figure No. 1. It can confirm the presence of different electrical configurations on the +D and -D lines, as will be explained in more detail

20 Later.

According to the present disclosure, the external device 05. can have a power source 15. having an output voltage of selectable voltage levels. For example, the selected voltage levels can be 5V, 9V, 12V, and 20V. Of course, when more or fewer levels are provided, different levels can be output, and so on. The external device 05. can also contain means

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Compare 25.a, 25.b, 25.c, and 25. D To detect voltage levels and current flows (e.g. through resistors RDAT_LKG and RDM_DWN) on the +D and -D lines. The voltage levels and current flows determine various electrical configurations that can be confirmed on the +D and -D lines by the mobile device 02.. The levels are used The reference voltage levels shown in Figure 5 are 1 volt, but it can be understood that in other models, the reference levels can be at other voltage levels.

As will be explained later, the external device 05. can also confirm the presence of different electrical configurations on the +D and –D lines using resistors RDAT_LKG and RDM_DWN. In some embodiments, a glitch filter may be provided 5.. to avoid false positive detections due to noise 10 on the D+ line.

As an illustrative example of the external device 05. (Figure 5) the power supply 500 (such as a wall adapter) may be cited, shown in Figure 5, which can provide voltage levels of 9 V, 12 V, and 20 V, in addition to the 5 V that Typically available on the VBUS voltage bus, a transformer may be used to electrically isolate the high-power primary side 505 from the low-power secondary side 502, which interfaces with the external medium. The secondary side 502 may contain an interface to an integrated circuit (IC) chip It has connections to D+ and D-lines. The IC chip interface may contain detection circuitry such as comparators 25. A-25. d shown in figure no., eg. In some embodiments, the interconnect IC can be integrated with an IC that controls direct current (DC/AC).

20 The primary side 505 can provide a selectable output voltage level on the VBUS bus. For example, the primary side 505 may have a power section 512 that is coupled to the secondary side 502. In the specific example shown in Figure 5, photocoupling 515 includes a light-emitting diode (LED) that transmits on the side

The secondary 502 can send optical signals to an LED receiver on the side of the power section 512 25 to control the output of the power section.

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The interface of an IC chip can contain electrical and logic circuits (other than...

Explained) can detect and decode a specific electrical configuration that has been confirmed on a line^{^}D +D and -D. maybe

That the 9V, 12V, and 20V switches are energized to control, via the resistor network 502A, the optical signal produced by the transmitting LED; That is, by controlling the signal frequency

5 Optical. The optical signal may then be received by the receiving LED and sensed by a control device in the power section 512. The control device may generate a voltage on the VBUS with a voltage level based on the optical signal sensed by the receiving LED. It may, of course, be understood that the use of resistor network 502 a and optical LEDs is merely illustrative and that in other embodiments, the secondary side 502 may communicate with the primary side 505 using any known signaling technique

10 Other than optical signaling; For example, a digital signal can be sent from the secondary side to the primary side.

05. It can be understood that the external device does not need to be a power source in itself, but any electronic device can be configured to provide multiple output multiple output voltage levels. For example, in some embodiments, the external device can be 05.

15 A portable computer that includes a voltage selector 502 and has a power supply with multiple output voltage levels.

Figure 5 illustrates a processing process in accordance with the present disclosure, when the mobile device 02 (Figure No.) is connected to an external device. As previously explained, in some embodiments, the mobile device 02 can operate in accordance with BC1.2 where the mobile device 02 can be seen .It is connected to a port on the external device 20. Going forward, the expressions “external device” and “port” can be used simultaneously and/or

In the same sense. Typical values for the voltage levels mentioned below can be determined in accordance with BC1.2. Figure 8 shows, for example, a table of voltage values mentioned in BC1.2.

Table 1: Shows the voltage values mentioned in BC1.2.

<tr><td><p dir="rtl">Permit Art</p></td><td><p dir="rtl">code</p></td><td><p dir="rtl">Circumstances</p></td><td><p dir="rtl">Minimum</p></td><td><p dir="rtl">Limit</p></td><td><p dir="rtl">units</p></td><td><p dir="rtl">Ref</p></td></tr>

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<tr><td></td><td></td><td></td><td></td><td><p dir="rtl">Maximum</p></td><td></td><td></td></tr><tr><td><p dir="rtl">Operating voltage</p><p>ACA</p></td><td><p>VACA_OP</p><p>R</p></td><td></td><td><p>5.1</p></td><td><p>6.0</p></td><td><p>V</p></td><td><p>-2-6</p><p>6</p></td></tr><tr><td><p dir="rtl">Leakage voltage</p><p>VBUS</p></td><td><p>VBUS_LKG</p></td><td></td><td></td><td><p>0.8</p></td><td><p>V</p></td><td><p>-1-5</p><p>.</p></td></tr><tr><td><p dir="rtl">Charging port output voltage</p></td><td><p>VCHG</p></td><td></td><td><p>5.85</p></td><td><p>5.25</p></td><td><p>V</p></td><td><p>5</p></td></tr><tr><td><p dir="rtl">Charging port failure voltage</p></td><td><p>VCHG-</p><p>FAIL</p></td><td></td><td><p>0..-</p></td><td><p>9.0</p></td><td><p>V</p></td><td><p>-5-5</p><p>5</p></td></tr><tr><td><p dir="rtl">Increase voltage</p><p dir="rtl">Excessive port</p><p dir="rtl">Shipping</p></td><td><p>VCHG_OV</p><p>ERSHT</p></td><td></td><td></td><td><p>6.0</p></td><td><p>V</p></td><td><p>-1-5</p><p>1</p></td></tr><tr><td><p dir="rtl">Deficiency voltage</p><p dir="rtl">Excessive outlet</p><p dir="rtl">Shipping</p></td><td><p>VCHG_UN</p><p>DSHT</p></td><td></td><td><p>5.1</p></td><td></td><td><p>V</p></td><td><p>-2-5</p><p>2</p></td></tr><tr><td><p dir="rtl">Data line leakage voltage</p></td><td><p>VDAT_LKG</p></td><td></td><td><p>0</p></td><td><p>..6</p></td><td><p>V</p></td><td><p>-2-.</p><p>.</p></td></tr><tr><td><p dir="rtl">Detection voltage</p><p dir="rtl">data</p></td><td><p>VDAT_REF</p></td><td></td><td><p>0.25</p></td><td><p>0.5</p></td><td><p>V</p></td><td><p>2-.</p></td></tr><tr><td><p dir="rtl">extinction voltage</p><p dir="rtl">data</p></td><td><p>VDAT_SIN</p><p>K</p></td><td></td><td></td><td><p>0.15</p></td><td><p>V</p></td><td><p>-5-.</p><p>2</p></td></tr>

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<tr><td><p dir="rtl">Voltage</p><p dir="rtl">Close DCP</p></td><td><p>VDCP_SH</p><p>TDOWN</p></td><td></td><td></td><td><p>2.0</p></td><td><p>V</p></td><td><p>-5-5</p><p>1</p></td></tr><tr><td><p dir="rtl">Source voltage</p><p>D-</p></td><td><p>VDM_SRC</p></td><td><p>NOTE</p><p>1</p></td><td><p>0.5</p></td><td><p>0.8</p></td><td><p>V</p></td><td><p>2-.</p></td></tr><tr><td><p dir="rtl">Source voltage</p><p>D+</p></td><td><p>VDP_SRC</p></td><td><p>NOTE</p><p>2</p></td><td><p>0.5</p></td><td><p>0.8</p></td><td><p>V</p></td><td><p>2-.</p></td></tr><tr><td><p dir="rtl">Draw voltage</p><p dir="rtl">No +D</p></td><td><p>VDP_UP</p></td><td></td><td><p>..0</p></td><td><p>..6</p></td><td><p>V</p></td><td><p>-2-.</p><p>5-5</p></td></tr><tr><td><p dir="rtl">Displacement voltage</p><p dir="rtl">The floor between</p><p dir="rtl">Host and PD</p></td><td><p>VGND_OF</p><p>FSET</p></td><td></td><td></td><td><p>.85</p></td><td><p>mV</p></td><td><p>5-.</p></td></tr><tr><td><p dir="rtl">Limit value</p><p dir="rtl">Logical</p></td><td><p>VLGC</p></td><td></td><td><p>0.1</p></td><td><p>2.0</p></td><td><p>V</p></td><td><p>-2-.</p><p>.</p></td></tr><tr><td><p dir="rtl">Boolean value</p><p dir="rtl">High</p></td><td><p>VLGC_HI</p></td><td></td><td><p>2.0</p></td><td><p>..6</p></td><td><p>V</p></td><td><p>-2-.</p><p>.</p></td></tr><tr><td><p dir="rtl">Boolean value</p><p dir="rtl">Low</p></td><td><p>VLGC_LO</p><p>W</p></td><td></td><td></td><td><p>0.1</p></td><td><p>V</p></td><td><p>-2-.</p><p>.</p></td></tr><tr><td><p dir="rtl">The applicable voltage in the OTG cycle</p></td><td><p>VOTG_SE</p><p>SS_VLD</p></td><td></td><td><p>0.1</p></td><td><p>5.0</p></td><td><p>V</p></td><td><p>1-.</p></td></tr>

At ring 502, the mobile device may detect 02. a communication incident. For example, an external device could output voltage to the VBUS. According to BC1.2, if the device detects

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02. Mobile device If a voltage level on the VBUS is greater than VOTG_SESSN_VLD for a preset period of time, the 02. Mobile device can determine that communication with the external device has occurred.

02. At block 505, the mobile device can determine whether the external device is a dedicated charging port (DCP). At block 506, if

<p dir="rtl">5 DCP detected, processing continues at box 501; Otherwise, a standard remote port (SDP) is detected.</p>

charging downstream (CDP) or standard downstream port

port . Ports SDP, DCP, and CDP are the port types defined in BC1.2.

According to BC1.2, box 505 can contain a primary detection step and a secondary detection step. 02. The mobile device can perform a preliminary detection operation to detect whether the external device is an SDP

<p dir="rtl">10 Whether or not an electrical configuration (i.e., voltage level) is confirmed on the +D line and an electrical configuration (i.e., voltage level) is sensed on the D-line. If an SDP is detected, the “NO” path in block 506 is followed and the mobile device can continue 02. According to SDP detection, if it is determined that the external device is not SDP, the mobile device 02. can perform a secondary detection operation to detect whether the external device is DCP or CDP by confirming the presence of an electrical configuration on the line.</p>

<p dir="rtl">15 -D and sensing electrical formation on line +D. If SDP is detected, the "L" path in box 506 is followed and the mobile device can continue 02. According to SDP detection.</p>

If CDP is not detected, processing proceeds, in some embodiments, to box 501. In other embodiments, before moving to box 501, the mobile device may perform additional detection steps in box 505 to detect connected devices that may be Private property, or which

<p dir="rtl">20 May be compatible with other levels, or be incompatible with BC1.2; For example, Apple® power adapters are typically not BC1.2 compliant, laptop manufacturers may produce power adapters that use proprietary circuits, and so on. If a non-BC1.2 port is not detected, processing can move to the 501 box.</p>

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Continuing with Figure 5, if the processing reaches box 501, the mobile device 02. determines that it is connected to a DCP. An external device according to the present disclosure (e.g. .05, in Figure No.) appears to be electrically similar to a DCP at this point, i.e. the external device shorts the +D and -D lines, for example, by using a switch connecting the +D lines And –D as it is

<p dir="rtl">5 Shown in figure .. Conventional DCP is typically intended for 5V. In comparison, an external device according to the present disclosure can output any of several higher voltage levels (e.g. 9 V, 12 V, 20 V, etc.), in addition to the 5 V level. Accordingly, an external device according to the present disclosure may be referred to as Dedicated charging port (DCP) (HVDCP) high voltage. According to the principles of the present disclosure, it may</p>

<p dir="rtl">10 02. The mobile device must perform additional detection to distinguish between an external device that is a traditional DCP and an HVDCP. Thus, in some embodiments, the mobile device can 02. confirm the presence of a VDP_SRC voltage level on line +D, at block 501.</p>

If the external device is a conventional DCP device, the short condition between +D and -D will be maintained. Accordingly, at box 510, the mobile device will sense 02. that level

<p dir="rtl">15 The voltage asserted at -D is greater than VDAT_REF and detects that a conventional DCP is connected.</p>

If the external device is an HVDCP device (such as .05, in the form of .), then according to the present disclosure, HVDCP will respond to the +D line asserted at VDP_SRC by opening a short circuit between the +D and -D lines. Accordingly, when Box 510, the mobile device will sense 02.

<p dir="rtl">20 A voltage level asserted at -D that is less than or equal to VDAT_REF, which may indicate that HVDCP has been connected. At block 512, if the mobile device 02. continues to detect voltage on the VBUS, this may notify the mobile device that the external device is still connected and that the external device is HVDCP.</p>

At this point, the mobile device can choose 02. operating voltage to receive from the

25 HVDCP. If operation at 5 volts is desired at box 515, the portable device

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02. The following electrical configuration can be confirmed on the +D and -D lines at block 515A: VDP_SRC on +D and ground voltage on -D. Likewise, if operation at 9 V at block 516 is desired, the mobile device can confirm the presence of the following electrical configuration on the +D and -D lines at block 516 A: VDP_UP on +D and VDM_SRC on -D. If 5 operation at 12 volts is required at box 511, the mobile device can confirm the presence of

The following electrical configuration is on the +D and -D lines at block 511A: VDP_SRC on +D and VDM_SRC on -D. If operation at 20 V at block 516 is desired, the portable device can confirm the presence of the following electrical configuration on the +D and -D lines at block 516A: VDP_UP on +D and VDM_UP on -D.

<p dir="rtl">10 It can of course be recognized that any suitable combination of voltage levels can be accompanied by different operating voltage values. It may also be noted that in some embodiments, different current flows on the +D and -D lines may be confirmed instead of voltage levels. In general, various combinations of voltage levels and current flows can be confirmed on the +D and -D lines.</p>

Continuing with Figure 5, in some embodiments, if the voltage level at block 522 is still 15 present on the VBUS voltage, processing can return to block 515. The loop allows

Mobile device 02. by dynamically changing the operating voltage according to need, providing a high degree of operating flexibility in mobile device 02. Thus, for example, at time t1, mobile device 02. can confirm the existence of a first electrical configuration on lines +D and -D To receive the first voltage level on VBUS. 02. At a later time t2 (without having to reconnect) the HVDCP, 20 the mobile device can confirm the presence of a second electrical configuration on the D+ and D-receiving lines.

Second voltage level on VBUS.

Referring now to Fig. 6, processing in an external device (e.g. 05, in Fig. No.) will now be discussed in accordance with the present disclosure, namely an HVDCP device. At block 602, the HVDCP can prepare itself for detection as a DCP. For example, the HVDCP can confirm the presence of 5

<p dir="rtl">25 Voltage on VBUS and shorts lines +D and -D. In addition, the +D line is dragged to</p>

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down using resistor RDAT_LKG (about 500 kΩ) for each BC1.2. In this case, the HVDCP appears electrically to be a DCP. The HVDCP enters loop 605 until the +D line exceeds the value of VDAT_REF.

When HVDCP is connected to the mobile device 02., the mobile device will continue in series

<p dir="rtl">5 Its disclosure is as previously explained. 02. If the mobile device is capable of accepting different output voltages on the VBUS, the mobile device can indicate this fact to the HVDCP by asserting VDP_SRC on line +D (box 501, in Figure 5), which the HVDCP will detect at boxes 606. And 601.</p>

At blocks 606 and 601, a time control facility (not shown) can be initiated in the HVDCP.

<p dir="rtl">10 While HVDCP senses line +D using fault filter 5.. (Figure 02). Fault filter 5.. can provide a safety measure by avoiding a false positive statement that the mobile device accepts different voltage levels. At box 610, if the line remains +D is greater than VDAT_REF after the time has expired, this can indicate to HVDCP that the mobile device 02. can receive different operating voltage levels and it searches for HVDCP accordingly, at block 612,.</p>

<p dir="rtl">15 02. The HVDCP can short-circuit between the +D and -D lines and pull the -D line through the resistor RDM_DWN to notify the mobile device that it is connected to the HVDCP.</p>

At block 615, if the HVDCP senses an electrical configuration where the D-line is greater than VDAT_REF, then at block 615A the HVDCP will output 5 volts on the VBUS. At block 616, if the HVDCP senses an electrical configuration where line +D is greater than

<p dir="rtl">20 VDAT_REF, at block 616A the HVDCP will output 12 volts on the VBUS. Likewise, at block 611, if the HVDCP senses an electrical configuration where the D-line is greater than VSEL_REF, then at block 611a the HVDCP will output 20 volts on the VBUS. Otherwise, at box 620 the HVDCP will output 9 volts on the VBUS. In some models, it can be adjusted</p>

VSEL_REF to be 2V±0.2V.

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Processing continues in box 622 to test whether line +D is still greater than VDAT_REF. If so, processing returns to box 615, allowing the HVDCP to change its output voltage to a different level.

The above processing between the mobile device 02. and the HVDCP can be summarized in the flow chart

5 Shown in Figure 1. At 102, HVDCP is connected to the mobile device. The HVDCP is originally configured to look like a DCP by putting out 5 volts on the VBUS and shorting its +D and -D lines. At 105, the mobile device performs detection according to BC1.2. At 106, the mobile device detects DCP, thus indicating that the detection process is complete per BC1.2. The mobile device then confirms the presence of a VDP_SRC on line +D, according to current detection principles, to see if the connected DCP is

<p dir="rtl">10 Is it HVDCP or not? At 101, the HVDCP senses the +D line to look for VDP_SRC, which indicates that the mobile device is capable of receiving multiple voltage levels. At 110, HVDCP short-circuits between +D and -D and triggers RDM_DWN to inform the mobile device that HVDCP is connected. At 112, the mobile device confirms that there is an electrical configuration on +D and -D corresponding to a required voltage level. At 115, the HVDCP outputs the required voltage level.</p>

<p dir="rtl">15 A useful feature of the present disclosure is to maintain backwards compatibility with existing devices. For example, a mobile device will verify according to the principles of the present detection and operate with HVDCP, according to the processing described in Figures 5 and 6 above. Furthermore, a portable device will meet the principles of the present disclosure and operate with non-HVDCP-devices, such as DCP, CDP, SDP, and, in some embodiments, non-BC1.2-ports (such as Apple® power adapters) in boxes 502,</p>

<p dir="rtl">20 505, and 506 in Figure 5. On the HVDCP side, HVDCP will work with a mobile device</p>

In the present disclosure according to the treatment described in Figures 5 and 6 above. Moreover, HVDCP will work with a conventional mobile device thanks to loop 602-605 in Figure 6. Since a conventional portable device will not confirm the presence of a VDP_SRC on the D+ signal line after DCP detection, the processing in HVDCP will take the “D” path. From box 605.

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The foregoing description illustrates various embodiments of this invention along with examples of how they may be implemented^{^}It has pictures of the specific models. The above examples should not be considered exclusive, and are provided to illustrate the flexibility and advantages of the special models identified in the following safeguards. Based on the present disclosure and the following safeguards, other arrangements, embodiments, applications and equivalents

<p dir="rtl">5 They can be used without departing from the scope of the present detection as specified by the protection elements.</p>

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