器件名称:
SM8121AD
功能描述:
White LED Driver IC
文件大小:
372.07KB 共19页
简 介:
SM8121A White LED Driver IC OVERVIEW The SM8121A is a high efciency step-up DC-DC converter. Due to high voltage CMOS process realizing 25V output supply as maximum value, 2 to 6 lights of white LED connected in series can be lighted. By connecting in series, current variation among LED is eliminated. Current value sent to white LED can be set by external resistors. In addition, brightness can also be adjusted by control to FB pin or CE pin. FEATURES I I PINOUT (Top view) I I I I I I I I I I I I I Boost-up control using PWM 2 to 6 lights of white LED (connected in series) lighted Output current value can be set by external resistors (51: 9.8mA, 33: 15.2mA, 24: 20.8mA) Brightness adjustable by control to FB pin or CE pin Current variation among LED decreased by high precision High efcient drive by step-up model Supply voltage range: 2.3 to 5.5V Maximum output voltage: 25V Quiescent current: 400A (typ) Standby current: 1.0A (max) RON (Switching MOS-Tr): 2 (typ) Switching frequency: 1.0MHz (typ) Output current detection accuracy: ± 2% Small package: SOT23-5 (SM8121AH) SON-6 (SM8121AD) SOT23-5 SW 1 5 VDD VSS 2 FB 3 4 CE I SON-6 APPLICATIONS I I I I I I I I I SW VSS VDD 1 6 FB VSS Cellular phone Pager Digital still camera Handy terminal PDAs Portable games White LED drive LCD bias supply Flash memory supply 3 4 CE ORDERING INFORMATION Device SM8121AH SM8121AD Package SOT23-5 SON-6 NIPPON PRECISION CIRCUITS INC.—1 SM8121A PACKAGE DIMENSIONS (Unit:……
