Tool/software:
TPS92513用pwm调光:当占空比为0时,led灯不亮;当把占空比拉高点亮led灯以后再把占空比设为0时,led灯依然有微亮,测得tps92513输出为19v,这是什么原因造成的?
Hi Customer,
TPS92513 cannot work with Vin = 24V and Vout = 24V (the switching duty cycle cannot be always 100%) since you need some switching-off time to charge the BOOT capacitor.
I will check if I can reproduce on our EVM the condition you observed when Vin was increased and will feedback to you later.
Best Regards,
Steven
Hi Customer,
Sorry for the late response.
Yes. We are using PWM duty cycle = 0% at PDIM pin to turn off the current output. The LEDs we use in the test are KW CSLPM1.TG-8N7P-EBVF46FCBB46-15B5-S from ams OSRAM.
Best Regards,
Steven