ttp932 led驱动ic 恒流电流ic 完全兼容mbi6651/mib6652

产品说明:

ttp932 为高效率、恒流降压直流对直流转换器。仅需要外部4个零组件就可以为大功率的led照明一稳定电流。ttp932的工作电压可从5v到36v，而且可以透过调整外部感测电阻的阻值而使得输出恒流达到1安培。ttp932的操作模式是採用迟滞pfm模式，可以提升效率达95%。调光部分，则是输入pwm信号至dim pin进行调光控制。除此之外，为确保整个系统的稳定操作ttp932有内建过温保护机制及led开路与短路保护机制。

产品特点：

输出恒流可达1安培

宽工作电压范围：5v~36v

内建ndmos 功率开关

单pin 可控制/关及pwm调光

在轻载情况下，迟滞pfm操作模式可明显提升效率

内建过温保护机制及led开路与短路保护机制

仅仅需要4个外部零组件

系统开关频率可达1mhz

一般情况下，恒流精准度可达输出恒流的3%

产品应用：

高功率led照明

车用led照明

led背光照明

恒流电流源

general description
ttp932 is a high efficiency , constant current , continuous mode inductive step-down converter,
designed for driving constant current to high power (single or multiple) led with only 4 external
components. ttp932 operates from input supply between 6v and 36v and provides an externally
adjustable output current of up to 1a.
the ttp932 is specifically designed with pfm control to enhance the efficiency up to 95% .
the output current can be modify by an external resister , and can adjusted , by applying an external
control signal to the dim pin , the dim pin will accept a pwm waveform.
additionally , to ensure the system reliability , ttp932 is built-in with over temperature
protection , and led open-circuit short-circuit protection to protect system from being damaged .
.features
? 1a output current
? wide input voltage range: 6v to 36v
? high efficiency (up to 95%)
? internal ndmos power switch
? single pin on/off and brightness control using pwm
? hysteretic pfm improves efficiency at light loads
? with thermal/soft start /led open-short detect protection
? only 4 external components
? up to 1mhz switching frequency
? typical 3% output current accuracy
.applications
z high power led lighting
z automotive led lighting
z low voltage industrial lighting
z led back-up lighting
z constant current source

详情请来电咨询，联系人 刘 醒辉 先生15813881481

ttp111说明 

general description
the ttp111 is a touch detector ic for the dc led lightings with nmos application. the
dimmer function controls by pwm output. it has high frequency for pwm output.

features
operating voltage typical 5.0v
operating current @vdd=5.0v, 25? no load <500ua
higher frequency 4.8khz pwm output.
support two option pin to select 4 type dimmer modes.
(1). 3 steps dimmer initial off. opt2=0, opt1=1
(2). 4 steps dimmer initial off. opt2=1, opt1=0
(3). 3 steps dimmer initial on (6%). opt2=0, opt1=0
(4). toggle on / off initial off. opt2=1, opt1=1
ttp111 pwm output active high control nmos.
two input dimmer modes: touch plate and switch
the application circuit is simple and easy.
can use long wire to connect the ic to touch plate