BQ25895RTWR I2C Single-Cell Li-Ion Battery Charger with Boost
I2C-controlled single-cell Li-ion charger with USB input, MaxCharge D+/D- adapter support, ICO, and 4.5-5.5 V battery boost on PMID up to 3.1 A. WQFN-24 with PowerPAD.
Aliase:BQ25895RTWR
WQFN-24 Top View
25 Pins
Pinout Table25
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | VBUS | Power | Charger input voltage, RBFET to PMID |
| 2 | D+ | Analog | USB data line positive, D+/D- detection |
| 3 | D- | Analog | USB data line negative, D+/D- detection |
| 4 | STAT | Digital | Open-drain charge status output |
| 5 | SCL | Digital | I2C interface clock |
| 6 | SDA | Digital | I2C interface data |
| 7 | INT | Digital | Open-drain interrupt output, 256 us pulse |
| 8 | OTG | Digital | Boost mode enable input |
| 9 | CE | Digital | Active low charge enable input |
| 10 | ILIM | Analog | Input current limit set and monitor, 0.8 V |
| 11 | TS | Analog | Temperature qualification voltage input (NTC) |
| 12 | QON | Digital | BATFET enable and reset control input |
| 13 | BAT | Power | Battery positive terminal, BATFET to SYS |
| 14 | BAT | Power | Battery positive terminal, BATFET to SYS |
| 15 | SYS | Power | System connection point |
| 16 | SYS | Power | System connection point |
| 17 | PGND | Ground | Power ground for high-current converter |
| 18 | PGND | Ground | Power ground for high-current converter |
| 19 | SW | Power | Switching node to output inductor |
| 20 | SW | Power | Switching node to output inductor |
| 21 | BTST | Power | High side driver supply, bootstrap cap to SW |
| 22 | REGN | Power | Low side driver supply output, 4.7 uF to GND |
| 23 | PMID | Power | Battery boost mode output |
| 24 | DSEL | Digital | Open-drain D+/D- multiplexer select control |
| EP | PowerPAD | Ground | Exposed pad for heat dissipation, solder to PGND |