TPS61181RTER

Texas Instruments · LED Drivers · WQFN-16-EP(3x3)

TPS61181RTER from Texas Instruments, in a WQFN-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	PGND	power_in	Power ground of the IC, internally connected to the source of the PWM switch.
2	SW	passive	Connects to the drain of the internal PWM switch, the external Schottky diode and the inductor; absolute maximum rating on SW is -0.3 V to 40 V.
3	VBAT	power_in	Battery supply input that provides the Fault pin pull-up reference and the battery voltage sense; recommended range 5.0 V to 24 V, and it is the input to the internal LDO on TPS61181.
4	VO	power_out	Monitors the boost regulator output and connects to the anodes of the WLED strings; absolute maximum rating is -0.3 V to 40 V and the overvoltage threshold is 38 V to 40 V.
5	ISET	input	A resistor on this pin programs the WLED output current, with ISET voltage 1.229 V typical and current multiple KISET of 1000 typical.
6	Cin	power_out	On TPS61181 this is the output of the internal LDO, which needs a 0.1 µF bypass capacitor and must not be connected to EN or other circuits; IC supply voltage range is 2.7 V to 3.6 V.
7	IFB1	input	Current sink regulation input connected to the WLED cathodes; each channel is limited to 25 mA and the PWM loop regulates the lowest IFB to 400 mV.
8	IFB2	input	Current sink regulation input connected to the WLED cathodes; each channel is limited to 25 mA and the PWM loop regulates the lowest IFB to 400 mV.
9	IFB3	input	Current sink regulation input connected to the WLED cathodes; each channel is limited to 25 mA and the PWM loop regulates the lowest IFB to 400 mV.
10	GND	power_in	Signal ground of the IC.
11	DCTRL	input	Dimming control logic input; the PWM dimming frequency range is 100 Hz to 1 kHz, with logic high at 1.2 V and logic low at 0.4 V.
12	IFB4	input	Current sink regulation input connected to the WLED cathodes; each channel is limited to 25 mA and the PWM loop regulates the lowest IFB to 400 mV.
13	IFB5	input	Current sink regulation input connected to the WLED cathodes; each channel is limited to 25 mA and the PWM loop regulates the lowest IFB to 400 mV.
14	IFB6	input	Current sink regulation input connected to the WLED cathodes; each channel is limited to 25 mA and the PWM loop regulates the lowest IFB to 400 mV.
15	EN	input	Enable input; a logic high turns on the internal LDO and enables the IC, and EN must not be connected to Cin.
16	Fault	output	Gate driver output for an external PFET used for fault protection, which can also serve as a system fault report signal and is referenced to the VBAT pull-up with absolute maximum rating -0.3 V to 24 V.
17	EP	passive	Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	WQFN-16-EP(3x3)
Category	LED Drivers
Pins	17

CAD (KiCad official)

Symbol: TPS61181RTER
Footprint: Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm
3D model: WQFN-16-EP(3x3) (KiCad packages3D, STEP)
3D model files: tps61181rter-etched.step / tps61181rter-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tps61181rter.step / tps61181rter.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (29 pp, sha256 e9480e02f5fae586, retrieved 2026-10-08, tier: lcsc)
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

# TPS61181RTER

**Texas Instruments** · LED Drivers · WQFN-16-EP(3x3)

TPS61181RTER from Texas Instruments, in a WQFN-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 | PGND | power_in | Power ground of the IC, internally connected to the source of the PWM switch. |
| 2 | SW | passive | Connects to the drain of the internal PWM switch, the external Schottky diode and the inductor; absolute maximum rating on SW is -0.3 V to 40 V. |
| 3 | VBAT | power_in | Battery supply input that provides the Fault pin pull-up reference and the battery voltage sense; recommended range 5.0 V to 24 V, and it is the input to the internal LDO on TPS61181. |
| 4 | VO | power_out | Monitors the boost regulator output and connects to the anodes of the WLED strings; absolute maximum rating is -0.3 V to 40 V and the overvoltage threshold is 38 V to 40 V. |
| 5 | ISET | input | A resistor on this pin programs the WLED output current, with ISET voltage 1.229 V typical and current multiple KISET of 1000 typical. |
| 6 | Cin | power_out | On TPS61181 this is the output of the internal LDO, which needs a 0.1 µF bypass capacitor and must not be connected to EN or other circuits; IC supply voltage range is 2.7 V to 3.6 V. |
| 7 | IFB1 | input | Current sink regulation input connected to the WLED cathodes; each channel is limited to 25 mA and the PWM loop regulates the lowest IFB to 400 mV. |
| 8 | IFB2 | input | Current sink regulation input connected to the WLED cathodes; each channel is limited to 25 mA and the PWM loop regulates the lowest IFB to 400 mV. |
| 9 | IFB3 | input | Current sink regulation input connected to the WLED cathodes; each channel is limited to 25 mA and the PWM loop regulates the lowest IFB to 400 mV. |
| 10 | GND | power_in | Signal ground of the IC. |
| 11 | DCTRL | input | Dimming control logic input; the PWM dimming frequency range is 100 Hz to 1 kHz, with logic high at 1.2 V and logic low at 0.4 V. |
| 12 | IFB4 | input | Current sink regulation input connected to the WLED cathodes; each channel is limited to 25 mA and the PWM loop regulates the lowest IFB to 400 mV. |
| 13 | IFB5 | input | Current sink regulation input connected to the WLED cathodes; each channel is limited to 25 mA and the PWM loop regulates the lowest IFB to 400 mV. |
| 14 | IFB6 | input | Current sink regulation input connected to the WLED cathodes; each channel is limited to 25 mA and the PWM loop regulates the lowest IFB to 400 mV. |
| 15 | EN | input | Enable input; a logic high turns on the internal LDO and enables the IC, and EN must not be connected to Cin. |
| 16 | Fault | output | Gate driver output for an external PFET used for fault protection, which can also serve as a system fault report signal and is referenced to the VBAT pull-up with absolute maximum rating -0.3 V to 24 V. |
| 17 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WQFN-16-EP(3x3) |
| Category | LED Drivers |
| Pins | 17 |

## CAD (KiCad official)

- Symbol: `TPS61181RTER`
- Footprint: `Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm`
- 3D model: WQFN-16-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `tps61181rter-etched.step` / `tps61181rter-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps61181rter.step` / `tps61181rter.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/tps61182) (29 pp, sha256 `e9480e02f5fae586`, retrieved 2026-10-08, tier: lcsc)
- **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/tps61181rter-datasheet.pdf)