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| 型号： | TB62754AFNG |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, PDSO20 |
| 封装： | 0.65 MM, PLASTIC, LEAD FREE, SSOP-20 |
| 文件页数： | 2/17页 |
| 文件大小： | 203K |
| 代理商： | TB62754AFNG |
TB62754AFNG
2007-1-30
9
4 Set time range of PWM ON/OFF
Cycle set of PWM signal is 1 to 10 kHz.
However, take care in setting PWM cycle because the minimum ON/OFF time is defined as 10 s.
Ex. When PWM signal frequency is set 10kHz, duty width has 0, 10 to 90, and 100%.
When PWM signal frequency is set 1 kHz, duty width has 0, 1 to 99, and 100%.
5 Soft-start function
Soft-start function is built in this IC.
However, this function is available when SHDN pin is input from low to high.
It does not work while PWM signal changes.
Soft-start setting time can be adjusted with external capacitor CSS.
6 Thermal shut down function
When IC temperature reaches specified temperature and TSD circuit drives, output is turned off by driving
internal shutdown circuit. TSD operation temperature range is 150
to 180 .
7 LED open protection
The protection function shown below works when LED is open during operation.
1) VOUT rises and OVP function works.
2) VOUT rises and thermal shutdown function works influenced by internal power consumption before it
reaches OVP voltage.
Applied voltage status of FB pins (1to 6) is detected when the protection function shown above works.
Outputs of these pins stop when open status pin exists.
SHDN pin should be input again to release the stop mode.
In case LED is open during normal operation.)
SHDN
PWM
FB1
FB2
FB6
Open status
VOUT rising raises voltage of
other FB pins.
Stop operation by OVP or thermal
shutdown function.
Detecting open status
and stop outputting is
kept.
Recover to normal status.
Release output stop signal.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TB62754AFNG(O,EL) | 功能描述:LED照明驱动器 White LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| TB62755FPG(O,EL) | 功能描述:LED照明驱动器 White LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| TB62756FUG | 制造商:MARKTECH 制造商全称:Marktech Corporate 功能描述:Step-up Type DC/DC Converter for White LEDs |
| TB62756FUG(O,EL) | 功能描述:LED照明驱动器 White LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| TB62757FPG(O,EL) | 功能描述:LED照明驱动器 White LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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