BQ25886RGER

@@ -0,0 +1,67 @@+# BQ25886RGER++**Texas Instruments** · Battery Management · VQFN-24-EP(4x4)++BQ25886RGER from Texas Instruments, in a VQFN-24-EP(4x4). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | D- | bidirectional | Negative USB data line. D+/D- based USB host/charging port detection including data contact detection (DCD) and secondary detection per BC1.2. |+| 2 | STAT | output | Open-drain charge status indicator. Connect to pull-up rail via 10kΩ resistor. LOW indicates charge in progress; HIGH indicates charge complete or charge disabled. Blinks at 1Hz when a fault occurs. |+| 3 | /CE | input | Active-low charge enable. Battery charging is enabled when /CE is LOW. Internally pulled low via 900kΩ resistor. |+| 4 | GND | power_in | Ground return. |+| 5 | OTG | input | USB On-the-Go enable input. Pull high to enable OTG (boost) function; pull low to disable. |+| 6 | VSET | input | Battery charge voltage limit. Resistor pull-down from VSET to GND sets regulation voltage: <18kΩ (short) = 8.2V, 39kΩ = 8.8V, 75kΩ = 8.7V, >150kΩ (floating) = 8.4V (all ±10%). |+| 7 | TS | input | Temperature qualification voltage. Connect NTC thermistor (103AT-2 recommended). Program temperature window with a resistor divider from REGN to TS to GND. Charge suspends when TS is out of range. |+| 8 | ILIM | input | Input current limit (IINDPM). Resistor to GND sets maximum input current: IINMAX = KILIM / RILIM (KILIM x 0.8V). IINDPM loop regulates ILIM voltage at 0.8V. Do not float. Min limit 500mA not supported. |+| 9 | /PG | output | Open-drain active-low power good indicator. Connect to pull-up rail via 10kΩ resistor. LOW indicates a good input source when VBUS is within VVBUS_OP (3.9V). Can sink more than IPOORSRC (30mA). |+| 10 | ICHGSET | input | Charge current limit. Resistor from ICHGSET to GND programs charge current in the range 30mA (114Ω) to 2.2A (8kΩ). Pre-charge/termination current is 1/10 of fast charge (min pre-charge 30mA, min termination 10mA). Short to GND = min 30mA; floating = disable charge. |+| 11 | REGN | power_out | Gate drive supply. Bias supply for internal MOSFET drivers and IC. Bypass to GND with a 4.7µF ceramic capacitor. REGN current limit is 50mA. |+| 12 | BTST | power_in | PWM high-side driver supply. Internally connected to the cathode of the boot-strap diode. Connect a 47nF bootstrap capacitor from SW to BTST. |+| 13 | BAT | power_out | Battery power connection. Connect minimum recommended 10µF (after derating) capacitance closely to BAT pin and GND. |+| 14 | BAT | power_out | Battery power connection. Connect minimum recommended 10µF (after derating) capacitance closely to BAT pin and GND. |+| 15 | SYS | power_out | System connection. Internal BATFET is between SYS and BAT. Switch-mode converter keeps SYS above minimum system voltage when battery is below that level. Connect 2x22µF (after derating) between SYS and PGND. |+| 16 | SYS | power_out | System connection. Internal BATFET is between SYS and BAT. Switch-mode converter keeps SYS above minimum system voltage when battery is below that level. Connect 2x22µF (after derating) between SYS and PGND. |+| 17 | SW | power_out | Inductor connection. Connect to the switched side of the external inductor. |+| 18 | SW | power_out | Inductor connection. Connect to the switched side of the external inductor. |+| 19 | GND | power_in | Ground return. |+| 20 | GND | power_in | Ground return. |+| 21 | PMID | power_in | Blocking MOSFET connection. Minimum recommended total input low-ESR capacitance on VBUS and PMID (after derating) is 10µF; at least 1µF on VBUS, remainder on PMID (typical 10µF). |+| 22 | PMID | power_in | Blocking MOSFET connection. Minimum recommended total input low-ESR capacitance on VBUS and PMID (after derating) is 10µF; at least 1µF on VBUS, remainder on PMID (typical 10µF). |+| 23 | VBUS | power_in | Input supply. Connected to the external DC supply (4.3V to 6.2V operating). Bypass VBUS to GND with at least 1µF ceramic capacitor placed as close to the IC as possible. |+| 24 | D+ | bidirectional | Positive USB data line. D+/D- based USB host/charging port detection including data contact detection (DCD) and secondary detection per BC1.2. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | VQFN-24-EP(4x4) |+| Category | PMIC |+| Pins | 24 |++## Ordering variants++Same part, different packaging or reel option.++- `BQ25886RGER`+- `BQ25886RGERRGET`++## CAD (KiCad official)++- Symbol: `BQ25886RGER`+- Footprint: `Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm`+- 3D model: VQFN-24-EP(4x4) (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/bq25886rger.pdf) (43 pp, sha256 `c62b2e45b2566342`, retrieved 2026-08-17, tier: manufacturer)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/bq25886rger-datasheet.pdf)

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