ZHCSGR3C May 2017 – September 2021 BQ25606
PRODUCTION DATA
The BQ25606 contains a D+/D– based input source detection to set the input current limit at VBUS plug-in. The D+/D– detection includes standard USB BC1.2 and nonstandard adapter. When input source is plugged in, the device starts standard USB BC1.2 detections. The USB BC1.2 is capable to identify Standard Downstream Port (SDP) and Dedicated Charging Port (DCP). When the Data Contact Detection (DCD) timer expires, the nonstandard adapter detection is applied to set the input current limit. The nonstandard detection is used to distinguish vendor specific adapters (Apple and Samsung) based on their unique dividers on the D+/D– pins. If an adapter is detected as DCP, the input current limit is set at 2.4 A. If an adapter is detected as unknown, the input current limit is set at 500 mAby ILIM pin.
| NONSTANDARD ADAPTER | D+ THRESHOLD | D– THRESHOLD | INPUT CURRENT LIMIT (A) |
|---|---|---|---|
| Divider 1 | VD+ within VD+ _2p8 | VD– within VD– _2p0 | 2.1 |
| Divider 2 | VD+ within VD+ _1p2 | VD– within VD– _1p2 | 2 |
| Divider 3 | VD+ within VD+ _2p0 | VD– within VD– _2p8 | 1 |
| Divider 4 | VD+ within VD+ _2p8 | VD– within VD– _2p8 | 2.4 |
| D+/D– DETECTION | INPUT CURRENT LIMIT (IINLIM) |
|---|---|
| USB SDP (USB500) | 500 mA |
| USB DCP | 2.4 A |
| Divider 3 | 1 A |
| Divider 1 | 2.1 A |
| Divider 4 | 2.4 A |
| Divider 2 | 2 A |
| Unknown 5-V adapter | Set by ILIM pin |