Hi,
I'm trying to use power module PTH08T230W. Application has been made according to product data sheet. Pins connection is:
1 - SYNC - tied to GND
2 - Vinput ( 10 V )
3 - GND
4 - Vo ( ~5.5 V )
5 - +SENS - shorted to Vo
6 - -SENS - shorted to GND
7 - Vadj - connected with GND via 5.6 OHm resistor
8 - TT - connected with Vo via 47 kOhm resistor
9 - Track - shorted to Vi
10 - Inhibit - left floating
Input capacitors bank is: 2 x 100 uF / 16V (ESR = 100 mOhm , tantalum) + 1 x 100 uF (ceramic) + 1 x 22 uF (ceramic)
Output capacitors: 1 x 100 uF / 10V (ESR = 80 mOhm, tantalum) + 2 x 100 uF (ceramic) + 1 x 22 uF (ceramic)
My target configuration is 10V input, 5.5V output with 4A of current.
When input voltage is applied module is not working. Output voltage is ~
0.2 V and just after few second temperature rise up to 70 ' C. Current
consumption is ~400mA @ 10V. Inhibit pin is left floating but after
shorting to GND nothing happens. Module not response. I've checked all
connections on PCB, ereythign is correct (according to data sheet). What
am I doing wrong? Have you got any sugesstions?
Best regards,
Lucas