BQ24070RHLR

@@ -0,0 +1,60 @@+# BQ24070RHLR++**Texas Instruments** · Battery Management · QFN-20-EP(3.7x4.7)++BQ24070RHLR from Texas Instruments, in a QFN-20-EP(3.7x4.7). 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 | VREF | power_out | Internal 3.3 V reference output. Active only when AC or USB input is present. Output current up to 20 mA; 0.1 µF decoupling capacitor recommended. |+| 2 | STAT1 | output | Charge status output 1 (open-drain). Requires external pullup (≥1 kΩ). VOL ≤ 0.25 V at 5 mA. |+| 3 | STAT2 | output | Charge status output 2 (open-drain). Requires external pullup (≥1 kΩ). Combined with STAT1 to encode charge state. |+| 4 | IN | power_in | Charge input voltage from AC adapter or USB source. Operating range 4.35-16 V (abs max 18 V). Input current limited to 2 A. |+| 5 | BAT | bidirectional | Battery input and output. Connects to single-cell Li-Ion/Li-Polymer pack positive terminal. Regulates to 4.2 V during charge; sources system current in battery mode. Pins 5 and 6 must be tied together externally. |+| 6 | BAT | bidirectional | Battery input and output. Second BAT pin - tie to pin 5. Handles up to 3.5 A source / 4 A sink current. |+| 7 | ISET2 | input | USB charge current set point. High = 500 mA fast charge, Low = 100 mA charge. Also selects half-charge current mode. |+| 8 | MODE | input | Power-source selection input. Low = USB mode current limit (defaults to USB charging); High = AC adapter mode (charges at ISET1 rate). VIL ≈ 1 V, VIH ≈ 1.024 V (small hysteresis, ~24 mV). |+| 9 | CE | input | Chip enable input (active high). Logic-level input; VIL ≤ 0.4 V, VIH ≥ 1.4 V. CE-holdoff time 3.3-6.2 ms. |+| 10 | ISET1 | bidirectional | Charge current set point (RSET to VSS) and precharge/termination set point. VSET typ 2.5 V; KSET ≈ 425 for 100 mA-1.5 A range. Also used to monitor charge current. |+| 11 | VSS | power_in | Ground pin electrically connected to the exposed thermal pad. Must be tied to board ground; do not rely on the thermal pad alone as the primary ground return. |+| 12 | TS | bidirectional | Battery temperature sense input. Compared against V(LTF)=2.5 V and V(HTF)=0.5 V thresholds using a 100 µA current source. Connects to a battery-pack NTC thermistor. |+| 13 | DPPM | input | Dynamic power-path management set point (RDPPM to VSS). Programs the OUT regulation set point via a 100 µA current source; SF scale factor ≈ 1.150. |+| 14 | TMR | bidirectional | Timer program input (RTMR to VSS, 30-100 kΩ). Sets fast-charge timer via KTMR ≈ 0.36 s/Ω. Tie to VREF to disable the safety timer and charge termination. |+| 15 | OUT | power_out | Regulated system output. bq24070 variant regulates to 4.4 V. Output current up to 4 A absolute max. Pins 15/16/17 must be tied together on the PCB. |+| 16 | OUT | power_out | Regulated system output. Tie to pins 15 and 17. Carries system load current from AC/USB input or battery. |+| 17 | OUT | power_out | Regulated system output. Tie to pins 15 and 16. |+| 18 | PG | output | Power-good status output (open-drain, active low). Requires external pullup (≥1 kΩ). VOL ≤ 0.25 V at 5 mA. |+| 19 | GND | power_in | Ground input. Tie to pin 20 and system ground. |+| 20 | GND | power_in | Ground input. Tie to pin 19 and system ground. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | QFN-20-EP(3.7x4.7) |+| Category | PMIC |+| Pins | 20 |++## Ordering variants++- `BQ24070RHLR`+- `BQ24070RHLRRHLT`++## CAD (KiCad official)++- Symbol: `BQ24070RHLR`+- Footprint: `Package_DFN_QFN:QFN-20-1EP_4x5mm_P0.5mm_EP2.65x3.65mm`+- 3D model: QFN-20-EP(3.7x4.7) (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/bq24070rhlr.pdf) (31 pp, sha256 `b3910527d343126b`, 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/bq24070rhlr-datasheet.pdf)

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