# BQ24074RGTT

**Texas Instruments** · Battery Management · VQFN-16-EP(3x3)

BQ24074RGTT from Texas Instruments, in a VQFN-16-EP(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | TS | input | External NTC Thermistor Input; connect to the NTC thermistor in battery pack to monitor 10kΩ thermistor. |
| 2 | BAT | bidirectional | Charger Power Stage Output and Battery Voltage Sense Input; connect to positive terminal of battery and bypass to VSS with 4.7-μF to 47-μF ceramic capacitor. |
| 3 | BAT | bidirectional | Charger Power Stage Output and Battery Voltage Sense Input; connect to positive terminal of battery and bypass to VSS with 4.7-μF to 47-μF ceramic capacitor. |
| 4 | CE | input | Charge Enable Active-Low Input; connect high to disable battery charging with OUT remaining active, connect low to enable charger, internally pulled down with ≈285 kΩ. |
| 5 | EN2 | input | Input Current Limit Configuration Input; use EN1 and EN2 to control maximum input current and enable USB compliance, internally pulled down with ≈285 kΩ. |
| 6 | EN1 | input | Input Current Limit Configuration Input; use EN1 and EN2 to control maximum input current and enable USB compliance, internally pulled down with ≈285 kΩ. |
| 7 | PGOOD | output | Open-drain Power Good Status Indication Output; pulls to VSS when valid input source is detected, high-impedance when input power outside specified limits. |
| 8 | VSS | power_in | Ground; connect to thermal pad and ground rail of circuit with internal electrical connection to exposed thermal pad. |
| 9 | CHG | output | Open-Drain Charging Status Indication Output; pulls to VSS when battery is charging, high-impedance when charging complete or charger disabled. |
| 10 | OUT | output | System Supply Output; provides regulated output when input is below OVP threshold and above regulation voltage, bypass to VSS with 4.7-μF to 47-μF capacitor. |
| 11 | OUT | output | System Supply Output; provides regulated output when input is below OVP threshold and above regulation voltage, bypass to VSS with 4.7-μF to 47-μF capacitor. |
| 12 | ILIM | input | Adjustable Current Limit Programming Input; connect 1100-Ω to 8-kΩ resistor from ILIM to VSS to program maximum input current (EN2=1, EN1=0), leaving unconnected disables charging. |
| 13 | IN | input | Input Power Connection; connect to external DC supply with input operating range 4.35 V to 10.5 V for BQ24074, bypass with 1 μF to 10 μF capacitor to VSS. |
| 14 | TMR | input | Timer Programming Input; controls pre-charge and fast-charge safety timers, connect to VSS to disable or 18-kΩ to 72-kΩ resistor to program desired length. |
| 15 | ITERM | input | Termination Current Programming Input; connect 0-Ω to 15-kΩ resistor from ITERM to VSS to program termination current, leave unconnected for default 10% termination threshold. |
| 16 | ISET | bidirectional | Fast Charge Current Programming Input; connect 590-Ω to 8.9-kΩ resistor from ISET to VSS to program fast charge current level, voltage at ISET reflects actual charging current. |
| 17 | Thermal Pad | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VQFN-16-EP(3x3) |
| Category | Power Management (PMIC) |
| Pins | 17 |

## CAD (KiCad official)

- Symbol: `BQ24074RGTT`
- Footprint: `Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm`
- 3D model: VQFN-16-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `bq24074rgtt-etched.step` / `bq24074rgtt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bq24074rgtt.step` / `bq24074rgtt.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/bq24075) (55 pp, sha256 `43e87bbb1254f71b`, retrieved 2026-10-05, tier: lcsc)
- **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:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/bq24074rgtt-datasheet.pdf)