Hello ,
First of all I am sorry for my English , I still learn it .
I need to drive 27 white leds ( backlight for portable DVD player ) . For these reason I tried to use tps61165 .
I had maked the circuit from it's datasheet " Figure 18. Drive 27 LEDs for Media Form Factor Display " . The board is homemade , but I am sure that IC is soldered correctly and it's pin's are not conected one with another. CTRL pin is pull up through 4.7K resistor . I conected 27 leds how is shown in datasheet , and had conected power ( 5v ) - LED's reamained off . After that I had checked one more time all conections , but all is good . Oscillodram of SW pin show's that there are not pulses . IC didn't do anything . What must it do if CTRL pin is pull up , and where I must see to find the cause of these problem ?
I am sorry one more time for my English.