Uploaded June 2016 | Updated September 2026, 3 weeks ago
TI Tuesday is here again, this time we look at the Texas Instruments Analog Evaluation Module TPS92512EVM. The TPS92512 Buck Regulator with Analog and PWM Dimming is an LED driver designed to drive LEDs upto 2.5Amps at 58V MAX.
The eval board is configured for a more modest 48V out at 1.5A and 12-48V input. I loaded it up with a 36V, 1.2A (40W) LED Panel
The device supports PWM and Analog control of the output current / LED intensity and both can be used at the same time. the chip also supports a sync input allowing the switching frequency to be overridden from the design 570 Khz to anywhere from 100KHz to 2MHz and it is here that I managed to fry the chip.. OOps
The video will show the switching waveforms and output being controlled by both Analog and PWM inputs and from this perspective it works very well and is easy to use. The sync input to override the switching frequency though seemed to not like me going over the 2MHz, this was accidental but nevertheless shows a slight flaw with the chip as the Current and Temperature protection failed to protect the device.
I will be making another video to show the repair and then I will run this test again but with more monitoring of the temperature as I crank up the frequency to see if it was that or perhaps something else.
Is this a good chip, sure it is and it would not be normal to overdrive the frequency like that without careful consideration of the Inductor value so this failure was all me....
Data on the chip can be found here:- ti.com/lit/ds/symlink/tps92512.pdf
and the evaluation module here ti.com/lit/ug/slvuac9a/slvuac9a.pdf
TI Tuesday is here again, this time we look at the Texas Instruments Analog Evaluation Module TPS92512EVM. The TPS92512 Buck Regulator with Analog and PWM Dimming is an LED driver designed to drive LEDs upto 2.5Amps at 58V MAX.
The eval board is configured for a more modest 48V out at 1.5A and 12-48V input. I loaded it up with a 36V, 1.2A (40W) LED Panel
The device supports PWM and Analog control of the output current / LED intensity and both can be used at the same time. the chip also supports a sync input allowing the switching frequency to be overridden from the design 570 Khz to anywhere from 100KHz to 2MHz and it is here that I managed to fry the chip.. OOps
The video will show the switching waveforms and output being controlled by both Analog and PWM inputs and from this perspective it works very well and is easy to use. The sync input to override the switching frequency though seemed to not like me going over the 2MHz, this was accidental but nevertheless shows a slight flaw with the chip as the Current and Temperature protection failed to protect the device.
I will be making another video to show the repair and then I will run this test again but with more monitoring of the temperature as I crank up the frequency to see if it was that or perhaps something else.
Is this a good chip, sure it is and it would not be normal to overdrive the frequency like that without careful consideration of the Inductor value so this failure was all me....
Data on the chip can be found here:- ti.com/lit/ds/symlink/tps92512.pdf
and the evaluation module here ti.com/lit/ug/slvuac9a/slvuac9a.pdf
