G2621 台湾致新代理商 GMT DC-DC系列 LED背光驱动器

Part Number	Vin (V)min.	Vin (V) max.	LED CH	VO_MAX(V)	ISW(A)	FSW(k Hz)	VLED FB (V)	Note	Package
G2621	2.5	5.5	1	40.0	1.2	1000	0.2	LX, GND, FB, EN, OVP, VIN, EN Dimming 100~200k Hz	TSOT-23-6/ SOT-23-6

Description
The G2621 step-up converter drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. It features allowing series connection of the white LEDs so that the LED currents are identical for uniform brightness. An enable input can be pulsed repeatedly to adjust LED’s brightness. The fast 1.0MHz current-mode PWM control allows for smaller capacitor and inductor. Fault condition protection uses cycle-by-cycle current limiting to sense maximum inductor current, thermal protection and over-voltage protection. Also included soft-start eliminates inrush current during start-up. The 0.2V low reference voltage minimized the power loss across the current-setting resistor.

The G2621 is available in SOT-23-6 packages.

Feature
Operating Voltage: 2.5V to 5.5V.
High Operating Frequency: 1MHz
High Output Voltage: Up to 40V(Typ.)
Digital Dimming Control.
Built-in Cycle-by Cycle Current-Limiting.
Built-in Soft-Start Function.
0.2V Low Reference Voltage
Thermal Overload Protection
SOT-23-6 Package

Application
GPS Navigation System
Compact Back Light Module
Constant Current Source
LED Module

Ordering Information