BQ24090DGQR

@@ -0,0 +1,51 @@+# BQ24090DGQR++**Texas Instruments** · Battery Management · MSOP-10-EP++BQ24090DGQR from Texas Instruments, in a MSOP-10-EP. 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 | IN | power_in | Input power from external DC supply (AC adapter or USB port). Absolute max 12 V; recommend 1 µF to 10 µF bypass from IN to VSS. |+| 2 | ISET | input | Fast-charge current programming input. External resistor from ISET to VSS sets the fast-charge current, valid range 10.8 kΩ (50 mA) to 540 Ω (1000 mA). |+| 3 | VSS | power_in | Ground terminal. Must be tied to system ground and to the exposed thermal pad, which is internally connected to VSS. |+| 4 | PRE-TERM | input | Programs the charge termination threshold (5%-50% of IOUT set by ISET) and sets the pre-charge current to 2× the termination current. Programming resistor range 1 kΩ to 10 kΩ (2 kΩ = IPGM/10 for termination; IPGM/5 for pre-charge). |+| 5 | PG | output | Open-drain Power-Good status output (active-low). Pulled low (internal FET on) when the input voltage is above UVLO and above the OUT/battery voltage. Requires external pull-up (typ. 2 kΩ shown in datasheet). |+| 6 | NC | unconnected | No connect (reserved for internal use). Do not make any external connection and do not route a trace through this pin. |+| 7 | ISET2 | input | USB/adapter input current-limit select: High = 500 mA max, Low = ISET-programmed current, FLOAT = 100 mA max. |+| 8 | CHG | output | Open-drain charge-status output (active-low). Pulled low (internal FET on) while charging and high-Z when charging is complete or absent. Max sink current 15 mA. |+| 9 | TS | input | Battery temperature-sense input. Connect through the battery-pack NTC thermistor (10 kΩ NTC @25 °C for bq24090/2/5; 100 kΩ NTC for bq24091/3). Floating or driving TS high forces TTDM Charger mode (disables TS monitoring, timers, termination); pulling low disables the IC. A 250 kΩ from TS to VSS prevents entering TTDM when the thermistor is removed. |+| 10 | OUT | power_out | Battery/system-load output. Connect the single-cell Li-Ion/Li-Pol battery here; the system load may be connected in parallel. Recommend 1 µF to 10 µF bypass; continuous current up to 1.25 A absolute max. |+| PAD | Thermal PAD | power_in | Exposed thermal pad. Internally connected to VSS and must be tied to the same VSS potential on the PCB for grounding and heat sinking. Do not use the pad as the primary ground return. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | MSOP-10-EP |+| Category | PMIC |+| Pins | 11 |++## Ordering variants++- `BQ24090DGQR`+- `BQ24090DGQRDGQT`++## CAD (KiCad official)++- Symbol: `BQ24090DGQR`+- Footprint: `Package_SO:MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm`+- 3D model: MSOP-10-EP (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/bq24090dgqr.pdf) (40 pp, sha256 `82ee6af1a6387d2c`, retrieved 2026-08-17, tier: manufacturer)+- **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/bq24090dgqr-datasheet.pdf)

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