L4120

UNISONIC TECHNOLOGIES CO., LTD L4120 Preliminary 40V/1.2A INTEGRATED POWER LED DRIVER CMOS IC „ DESCRIPTION The UTC L4120 is a continuous conduction mode inductive step-down converter, designed for driving single or multiple series connected LEDs. Using a few external components. The UTC L3080 has a build-in power switch, based on different input voltage, The UTC L4120 can drive several 1W or 3W LEDs. The device has the function of thermal shutdown protection and LED short-circuit/open-circuit protection. „ FEATURES * Up to 1.2A output current * High efficiency (up to 97%) * Wide input voltage range: 5V~30V * Typical ±5% output current accuracy * Single DIM pin on/off and brightness control using DC voltage or PWM signal * Internal thermal shutdown protection. * Adjustable Constant LED Current 1 SOT-89-5 „ ORDERING INFORMATION Ordering Number Lead Free Halogen Free L4120L-AB5-R L4120G-AB5-R Package SOT-89-5 L4120L-AB5-R (1)Packing Type (2)Package Type (3)Lead Free (1) R: Tape Reel (2) AB5: SOT-89-5 (3) L: Lead Free, G: Halogen Free „ MARKING Packing Tape Reel www.unisonic.com.tw Copyright © 2014 Unisonic Technologies Co., Ltd 1 of 4 QW-R125-031.a L4120 „ PIN CONFIGURATION Preliminary CMOS IC „ PIN DESCRIPTION PIN NO. 1 2 3 4 5 PIN NAME LX GND ADJ ISENSE VIN DESCRIPTION Switch pin Ground Multi-function On/Off and brightness control pin Current sense input Input voltage „ BLOCK DIAGRAM + UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 4 QW...