锐单电子商城 , 一站式电子元器件采购平台!
  • 电话:400-990-0325

LM3421MH

TEXAS INSTRUMENTS  LM3421MH  发光二极管驱动器, 2输出, 升压, 降压, 反激, SEPIC, 4.5V-75V输入, 2MHz开关, 75V输出, TSSOP-16

The is a versatile high voltage N-channel Controller for constant current LED drivers. It can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75V, makes the LM3421 device ideal for illuminating LEDs in a large family of applications. Adjustable high-side current sense voltage allows for tight regulation of the LED current with the highest efficiency possible. The device uses predictive off-time PRO control, which is a combination of peak current-mode control and a predictive off-timer. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation. The devices include a high-voltage start-up regulator that operates over a wide input range of 4.5 to 75V. The internal PWM controller is designed for adjustable switching frequencies of up to 2MHz, thus enabling compact solutions.

.
High-side adjustable current sense
.
Input under-voltage and output over-voltage protection
.
PWM and analogue dimming
.
Cycle-by-cycle current limit
.
Programmable switching frequency
.
Zero current shutdown and thermal shutdown
.
2R, 1A Peak MOSFET gate drive
.
Green product and no Sb/Br

LM3421MH PDF数据文档
图片 型号 厂商 下载
LM3421MH TI 德州仪器
LM3414HVMR National Semiconductor 美国国家半导体
LM3429MH National Semiconductor 美国国家半导体
LM3401MMX National Semiconductor 美国国家半导体
LM3445MM National Semiconductor 美国国家半导体
LM3404MAX National Semiconductor 美国国家半导体
LM3404HVMR National Semiconductor 美国国家半导体
LM3485MM National Semiconductor 美国国家半导体
LM3406HVMHX National Semiconductor 美国国家半导体
LM3409HVMY National Semiconductor 美国国家半导体
LM3402HVMR National Semiconductor 美国国家半导体