ZHCSIJ0B July 2018 – February 2022 BQ25601D
PRODUCTION DATA
The BQ25601D 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 non-standard 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 non-standard adapter detection is applied to set the input current limit. The non-standard 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 0.5 A.
| NON-STANDARD ADAPTER | D+ THRESHOLD | D– THRESHOLD | INPUT CURRENT LIMIT (A) |
|---|---|---|---|
| Divider 1 | VD+ within V2P7_VTH | VD– within V2P0_VTH | 2.1 |
| Divider 2 | VD+ within V1P2_VTH | VD– within V1P2_VTH | 2 |
| Divider 3 | VD+ within V2P0_VTH | VD– within V2P7_VTH | 1 |
| Divider 4 | VD+ within V2P7_VTH | VD– within V2P7_VTH | 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 |