Other Parts Discussed in Thread: TPS92518
Hello TI expert,
I met with a technical problem with TPS92518 HV chip. i use this chip to work with TPS92662 , realize matrix function.
when i set up the Tpk =40, Toff=40, the coill is 470uH, the TPS92518 chip output current is about 100mA.
Work with TPS92662, i set the phase is 0, width is 40 for first LED, it can light up normally. set the phase is 10, width 40 to light up is ok, but the led is dimming. when set
phase is 20 width 40 to light up the third LED, the second led is off. , it seems that the dynamic problem.
I see the tps 92518 chip about shunt part, but don't know how to use it. could you pls. check and give me some suggestion?
thx a lot in advance.