SGM3771A

Active

28V, 2A, Synchronous Buck LED Driver with PWM Input Analog Dimming Mode

SGM3771A.pdf

The SGM3771A is a 2A, synchronous Buck LED driver with 28V maximum input voltage. The integrated power MOSFETs and fixed 1MHz (TYP) switching frequency provide high efficiency and extremely small solution size.

The SGM3771A supports analog dimming with digital input. It accepts an external PWM dimming signal, and the internal reference voltage changes proportionally to the duty cycle of the PWM signal in 1% to 100% range. The reference voltage is 100mV (TYP) when a 100% duty cycle PWM signal (DC voltage) is applied. And the recommended PWM signal frequency is from 20kHz to 200kHz.

The SGM3771A implements full protections, including over-current protection with hiccup mode, LED+ short to GND, LED short and open, FB sense resistor short and open, and thermal shutdown.

The SGM3771A is available in a Green TSOT-23-6 package. It operates over a wide junction temperature range of -40℃ to +125℃.

FEATURES

4V to 28V Wide Input Range
Maximum 2A LED Driving Capability
Fixed 1MHz (TYP) Switching Frequency
Low R_DSON for Internal MOSFETs
High-side/Low-side: 100mΩ/65mΩ (TYP)
Low Shutdown Current: 2μA (TYP)
Peak-Current Mode Control
Output Discharge in Turn-Off
Over-Current Protection with Hiccup Mode
Output Short-Circuit Protection
LED Short and Open Protection
FB Sense Resistor Short and Open Protection
+160℃ (TYP) Die Temperature Thermal Shutdown
Available in a Green TSOT-23-6 Package

APPLICATIONS

General IR/White LED Driver
IP Camera System
Indicator Driving
Industrial and Commercial Lighting

Ordering Information

Part Number	Status	Package	Pins	Pd-Free	RoHS	REACH	Green	MSL Rating	Operating Temperature Range	Material Content	Reliability Report	Unit Resale Price* (Volume Range: in USD)	Lead Time** (Volume Range: Days)
SGM3771AXTN6G/TR	Active	TSOT-23-6	6	YES	YES	YES	YES	MSL1	-40℃ to +125℃	View	View

* The unit resale price is for reference purposes only. Please contact our distributors for a formal quotation.

** The lead time provided is for reference purposes only and is subject to change based on different circumstances.