PT4121
50V，Step-down High Brightness
LED Controller
GENERAL DESCRIPTION
The PT4121 is a high efficiency step-down controller.It is designed to operate in continuous conduction mode and drive single or multiple series connected LED efficiently from a voltage source higher than the total LED chain voltage. It operates with a wide input voltage from 6V to 50V and provides an externally adjustable output current.
The PT4121 includes a high-side output current sense circuit, which uses an external resistor to set the nominal average output current, and a dedicated DIM input accepts either a DC voltage or PWM dimming.
The PT4121 is available in SOT23-6 packages.
FEATURES
l Simple low parts count
l Wide input voltage range: 6V to 50V
l High efficiency (up to 97%)
大功率升压恒流芯片降压IC恒流降压IC驱动IC线性IC联系欧阳： QQ:
l Single pin on/off and brightness control using DC Voltage or PWM
l Up to 1MHz switching frequency
l Adjustable Constant LED Current
l Typical 3% output current accuracy
l High-Side Current Sense
l Hysteretic Control: No need compensation
l Inherent RCS open protection
l Inherent open-circuit LED protection
l Inherent short-circuit LED protection
l Thermal shutdown
PTPLICATIONS
l Low voltage halogen replacement LEDs l Automotive/Decorative lighting
l Low voltage industrial lighting l LED back-up lighting
大功率升压恒流芯片降压IC恒流降压IC驱动IC线性IC联系欧阳： QQ:
l Signs/Emergency lighting l SELV lighting
深圳世微半导体有限公司简介
联系方式：
联系人：欧阳 电话： QQ: 座机：
深圳世微半导体有限公司是一家专业从事专用模拟集成电路芯片产品的研制、开发和销售的高新技术企业，现已成功设计生产出几十种集成电路产品。主要生产的产品包括：电源IC、DC/DC升压芯片、DC/DC降压IC、太阳能草坪灯IC、手电筒功能IC、逻辑IC、LDO稳压IC、带使能端LDO、射灯IC、日光灯IC、低压检测IC、复位IC、背光驱动芯片、LED恒流驱动IC、锂电充电管理IC、锂电保护IC、MOSFET、功放IC、运放IC、存储IC、等系列产品。大功率升压恒流芯片降压IC恒流降压IC驱动IC线性IC联系欧阳： QQ:
产品主要的应用范围：信息家电、无线通信、数字通讯和网络技术，便擕式产品、MP3、MP4、PMP、手机、存贮卡、数码相机、数码相框、摄像头、U盘、光电鼠标、LED灯、电动玩具、遥控玩具、电子辞典、复读机、无线耳机、无线鼠标键盘、汽车防盗器、LED手电筒、矿灯、灯饰品、电子礼品、直流圣灯、太阳能草坪灯、蜡烛灯、头灯、MR16、E27射灯、灯杯、日光灯、LED照明装置、路灯、像素灯、灯条、灯管、迷你小音响、点读机、点读笔、游戏手柄、倒车灯、防丢器、充电器、键盘电动玩具类产品、闪灯、计步器、电子称、摇控器、PDVD、CARDVD、LCD-TV、GPS、机顶盒、等消费类电子领域。为电子设备中的主芯片及相关器件提供优质稳定的电源解决方案，并在团队建设、产品开发、质量控制、客户服务等方面获得了较大突破。大功率升压恒流芯片降压IC恒流降压IC驱动IC线性IC联系欧阳： QQ:
