
PT4119E
50V/1A Step-down High Brightness
LED Driver
CR POWTECH (SHANGHAI) CO., LTD. WWW.CRPOWTECH.COM Page 1
PT4119E_DS_Rev EN 1.0
GENERAL DESCRIPTION
The PT4119E is a continuous conduction mode
inductive step-down converter, designed for driving
single or multiple series connected LED efficiently
from a voltage source higher than the total LED chain
voltage. The device operates from an input supply
between 6V and 50V and provides an externally
adjustable output current of up to 1A.
The PT4119E includes the power switch and a
high-side output current sensing circuit, which uses an
external resistor to set the nominal average output
current, and a dedicated DIM input accepts either a DC
voltage or a wide range of pulsed dimming. Applying a
voltage of 0.3V or lower to the DIM pin turns the
output off and switches the device into a low current
standby state.
The PT4119E is available in SOT89-5 package.
FEATURES
Simple low parts count
Wide input voltage range: 6V to 50V
High efficiency (up to 97%)
Up to 1A output current
Single pin on/off and brightness control using DC
voltage or PWM
Up to 1MHz switching frequency
Typical 3% output current accuracy
Inherent open-circuit LED protection
Inherent Rcs open protection
High-Side Current Sense
Hysteretic Control: No need compensation
Adjustable Constant LED Current
Thermal shutdown
APPLICATIONS
Low voltage halogen replacement LEDs
Automotive lighting
Low voltage industrial lighting
LED back-up lighting
Illuminated signs
SELV lighting
LCD TV backlighting
ORDERING INFORMATION
PACKAGE
TEMPERATURE
RANGE
ORDERING PART
NUMBER
TRANSPORT
MEDIA
MARKING
SOT89-5 -40
o
C to 85
o
C PT4119EE89E
Tape and Reel
1000 units
PT4119E
xxxxxX
Note:
TYPICAL APPLICATION CIRCUIT
PT411E
VIN CSN SW
DIM
GND
R
S
L
C
IN
V
IN
D
AC12-24V
DC6-50V
LED
xxxxxX
Assembly Factory Code
Lot Number
PT4119E是一种连续导通模式感应降压转换器,设计用于从高于LED链总电压的电压源高效
驱动单个或多个串联LED。该装置由6V至50V的输入电源供电,并提供高达1A的外部可调输
出电流。PT4119E包括电源开关和高压侧输出电流感测电路,该电路使用外部电阻器设置标
称平均输出电流,专用DIM输入接受直流电压或宽范围脉冲调光。向DIM引脚施加0.3V或更
低的电压可关闭输出,并将设备切换到低电流待机状态。
PT4119E有SOT89-5包装。
评论0
最新资源