TI中文支持网The TPS61196 provides a highly integrated solution for LCD TV backlight with an independent PWM dimming
function for each string. This device is a current mode boost controller driving up to six WLED strings with
multiple LEDs in series. Each string has an independent current regulator providing a LED current adjustable
from 50 mA to 400 mA within ±1.5% matching accuracy. The minimal voltage at the current sink is
programmable in the range of 0.3 V to 1 V to fit with different LED current settings. The input voltage range for
the device is from 8 V to 30 V.
数据表上有这么一段，TPS61196最小只能50mA吗？还是通过ISET设置最低只能50mA?如果采用PWM控制能不能做到更低？
Iven Su：
你好，
根据手册说明，芯片推荐的电流范围是50mA~400mA，是正常工作下最小到50mA。采用PWM控制可能可以做到更低，手册中没有具体说明，可以尝试一下。
希望可以帮助到你，谢谢。
FENG OU：
回复 Johnsin Tao:
请问能知道最小电流是多少吗？如果PWM调光后低电流长期使用，对芯片的性能（除开精度之外）或质量是否有影响？相应的外部电路处理是否还有要注意的？谢谢
