TPS92210: No output from 9W LED driver

Atul Bhakay

Part Number: TPS92210

Hi,

Specification:

Input
Operating Voltage Range	120 to 270 VAC
Operating Frequency Range	48 to 62Hz
Power factor	>0.95
Harmonic Distortion (THD)	<12%
Isolation	Isolated input and output ground are to separate
Output
Nominal Output Voltage	30Vdc
Output Current	300mA
CV/CC	Constant output Voltage and constant current

We designed 9W LED driver PCB with IC part number: TPS92210, make: TI. We followed and using TI reference guide TPS92210-PMP6001 for the above LED driver.

LED driver is not working . Please find the attached schematic for your reference.

Please suggest for further action.3833.9wld_20feb18.pdf 9W LED driver Transformer details.pdf

over 6 years ago

0 VA Viswanathan over 6 years ago

TI__Prodigy 750 points

I see a duplicate post in e2e.ti.com/.../2449616 I will close this and I have replied to the other one.

0 Atul Bhakay over 6 years ago in reply to VA Viswanathan

Genius 3205 points

Hi, this has not been resolved as yet.
Kindly suggest which points to probe so as to debug this led driver not operating

0 VA Viswanathan over 6 years ago in reply to Atul Bhakay

TI__Prodigy 750 points

Are there components damaged? Is the power MOSFET working correctly? Is the DRN pin biased at full voltage? What about the GATE of the mosfet pin. Does it get biased?

0 VA Viswanathan over 6 years ago in reply to VA Viswanathan

TI__Prodigy 750 points

Additionally, try bypassing the VCG pin and biasing the MOSFET Drain with a external 18V Zener and see if the problem goes away

Power management

Power management forum

TPS92210: No output from 9W LED driver