AL1791AFE-13 from Diodes Incorporated, in a UDFN-14-EP(4x3). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model). Symbol and footprint from KiCad-official CAD; the 3D model is generated from the datasheet's package dimensions.

Pinout

Pin	Name	Type	Function
1	EN	input	Active-high enable, internally pulled down; the device is enabled above approximately 2.5 V and disabled below 0.4 V.
2	PWM4/GND	power_in	On the AL1791 this pin is GND (channel 4 PWM input applies only to the AL1794, where it is internally pulled down).
3	PWM3/GND	power_in	On the AL1791 this pin is GND (channel 3 PWM input applies only to the AL1793 and AL1794, where it is internally pulled down).
4	PWM2/GND	power_in	On the AL1791 this pin is GND (channel 2 PWM input applies only to the AL1792, AL1793, and AL1794, where it is internally pulled down).
5	PWM1	input	Channel 1 PWM or analog dimming input, internally pulled down (tie to GND if unused), with logic high at 2.5 V minimum, logic low at 0.3 V maximum, and PWM frequency of 0.5 to 4 kHz.
6	LED1	output	Channel 1 LED cathode connected to the integrated current sink; the AL1791 maximum recommended channel current is 1.0 A, set by RSET.
7	LED2/GND	power_in	On the AL1791 this pin is GND (channel 2 LED cathode applies only to the AL1792, AL1793, and AL1794).
8	GND	power_in	Ground, internally connected to the exposed pad.
9	LED3/GND	power_in	On the AL1791 this pin is GND (channel 3 LED cathode applies only to the AL1793 and AL1794).
10	LED4/GND	power_in	On the AL1791 this pin is GND (channel 4 LED cathode applies only to the AL1794).
11	LEDPG	output	Open-drain LED power-good indication, asserted low to report insufficient LED headroom, and requires an external pull-up resistor.
12	FAULTB	output	Open-drain fault report, asserted low for LED open or short, over-temperature shutdown, or UVLO, and requires an external pull-up resistor; output low voltage is 180 mV maximum at 1 mA.
13	REF	passive	Reference current setting through an external RSET resistor; VREF is 1.5 V typical, and IREF is 0.125 mA with RSET = 12 kΩ.
14	VIN	power_in	Voltage input, 6.5 V to 30 V recommended operating range, with 30 V absolute maximum.
15	EP	passive	Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	UDFN-14-EP(4x3)
Category	Display Modules / LED Drivers / Display Drivers
Pins	15

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Input voltage at VIN	VIN	6.5		30	V		7
Operating Ambient Temperature	TA	-40		125	C		7
High-Level Input Voltage on EN and PWMx	VIH	2.5		5.5	V		7
Low-Level Input Voltage on EN and PWMx	VIL	0		0.4	V		7
EN Low Voltage	VIL(EN)	0		0.4	V		8
EN High Voltage	VIH(EN)	2.5			V		8
EN Internal Pulldown	I(EN-PD)	0.35		3.5	μA	VEN=5V	8
Digital PWM Low Voltage	VIL(PWMx)			0.3	V		8
Digital PWM High Voltage	VIH(PWMx)	2.5			V		8
Digital PWM Frequency	FPWMx	0.5		4	KHz		8
PWM Internal Pulldown	I(PWMx-PD)	0.35		3.5	μA	VEN=5V	8
Reference Voltage	VREF	1.47	1.5	1.53	V		8
LEDx Leakage Current	ILED_LEAK		0.1	2	μA	VPWMx=0V, VLEDx=+12V	8
LED Current Accuracy	ILED_ACCURACY	-4		4	%	RSET=12KΩ	8
FAULTB Output Low Voltage	VFOL			180	mV	IFAULTB=1mA	8
FAULTB Leakage Current	IFOH			1	μA	VFAULTB=6V	8
ESD HBM Human Body Model ESD Protection	ESD			4000	V		7
CDM Charged Device Model ESD Protection				1000	V		7
Input Voltage	VIN			30	V		7
Enable Voltage, PWM Voltage	VEN, VPWMx			7	V		7
Maximum Junction Temperature	TJ(MAX)			160	°C		7
Storage Temperature Range	TST	-65		150	°C		7
Thermal Resistance Junction-to-Ambient U-DFN4030-14	θJA		55		°C/W		8
Thermal Resistance Junction-to-Case U-DFN4030-14	θJC		12		°C/W		8

CAD (land: KiCad; 3D: generated from the datasheet)

Symbol: AL1791AFE-13
Footprint: Package_DFN_QFN:DFN-14-1EP_3x4mm_P0.5mm_EP1.7x3.3mm
3D model: UDFN-14-EP(4x3), generated on the KiCad land (body 3 x 4 mm, terminals on the pads, 0.6 mm tall, datasheet A, nominal). KiCad's stock model for this land is taller than the datasheet allows, so the model is generated from the datasheet drawing; the dimensions come from the datasheet drawing where it was read and are defaults otherwise (see provenance.model_3d_generated), not the manufacturer's CAD (STEP)
3D model files: al1791afe-13-etched.step / al1791afe-13-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); al1791afe-13.step / al1791afe-13.glb are the bare package body.

Provenance

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

Datasheet: Diodes Incorporated datasheet (18 pp, sha256 b00e0b817e901edf, retrieved 2026-11-13, tier: manufacturer)
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: land: KiCad official libraries (CC-BY-SA 4.0); 3D: generated from the datasheet's package dimensions (provenance.model_3d_generated).

Datasheet PDF

AL1791AFE-13

Verified AL1791AFE-13

Verification log 2 records

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README