# BQ24072TRGTT

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

BQ24072TRGTT from Texas Instruments, in a QFN-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 that connects to the center tap of a VIN-to-GND resistor divider; for applications not using the TS function, the divider is set to a 20% ratio. |
| 2 | BAT | bidirectional | Charger power stage output and battery voltage sense input that connects to the positive battery terminal and must be bypassed to VSS with a 4.7μF to 47μF ceramic capacitor. |
| 3 | BAT | bidirectional | Charger power stage output and battery voltage sense input that connects to the positive battery terminal and must be bypassed to VSS with a 4.7μF to 47μF ceramic capacitor. |
| 4 | CE | input | Active-low charge enable: a high level places the charger in standby mode and a low level enables charging; CE is internally pulled down with ~285kΩ and must not be left unconnected. |
| 5 | EN2 | input | Input current limit configuration input that works with EN1 to select 100 mA, 500 mA, ILIM-set, or standby input current; internally pulled down with ~285kΩ and must not be left unconnected. |
| 6 | EN1 | input | Input current limit configuration input that works with EN2 to select 100 mA, 500 mA, ILIM-set, or standby input current; internally pulled down with ~285kΩ and must not be left unconnected. |
| 7 | PGOOD | output | Open-drain power-good status output that pulls to VSS when a valid input source is detected and is high-impedance otherwise; use a 1kΩ to 100kΩ pull-up resistor, and PGOOD sink current is limited to 15 mA. |
| 8 | VSS | power_in | Ground that must connect to the thermal pad and the circuit ground rail and must be connected to ground at all times. |
| 9 | CHG | output | Open-drain charge status output that pulls to VSS while charging, is high-impedance when charging is complete or the charger is disabled, and flashes on a timer fault; use a 1kΩ to 100kΩ pull-up resistor. CHG sink current is limited to 15 mA. |
| 10 | OUT | output | System supply output that provides a regulated output when the input is below the OVP threshold and above the regulation voltage, and must be bypassed to VSS with a 4.7μF to 47μF ceramic capacitor. |
| 11 | OUT | output | System supply output that provides a regulated output when the input is below the OVP threshold and above the regulation voltage, and must be bypassed to VSS with a 4.7μF to 47μF ceramic capacitor. |
| 12 | ILIM | output | Adjustable input current limit programming pin that connects to VSS through a 1.07kΩ to 7.5kΩ resistor to set the maximum input current (EN2=1, EN1=0); leaving ILIM unconnected disables all charging. |
| 13 | IN | input | Input power connection for the AC adapter or USB port with an operating range of 4.35V to 6.6V; it accepts up to 26V without damage but operation is suspended above the operating range, and it must be bypassed to VSS with a 1μF to 10μF ceramic capacitor. |
| 14 | TMR | input | Timer programming input for the pre-charge and fast-charge safety timers: connect to VSS to disable all timers, use an 18kΩ to 72kΩ resistor to VSS to set custom lengths, or leave unconnected for default values. |
| 15 | TD | input | Termination disable input: connect high to disable charger termination or to VSS to enable it; TD is checked only during startup, cannot change during operation, and is internally pulled down to VSS with ~285kΩ. |
| 16 | ISET | bidirectional | Fast-charge current programming input that connects to VSS through a 590Ω to 3kΩ resistor; charging is disabled if ISET is left unconnected, and while charging its voltage reflects the actual charge 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 | QFN-16-EP(3x3) |
| Category | Power Management (PMIC) |
| Pins | 17 |

## CAD (KiCad official)

- Symbol: `BQ24072TRGTT`
- Footprint: `Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm`
- 3D model: QFN-16-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `bq24072trgtt-etched.step` / `bq24072trgtt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bq24072trgtt.step` / `bq24072trgtt.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/bq24072t) (44 pp, sha256 `0c44cec8ce4f80c9`, retrieved 2026-10-11, 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-5-5` (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/bq24072trgtt-datasheet.pdf)