Part Number: TPS92512HV I have Rt = 162k, and I measure my switching frequency to be approx 714kHz, so I am in the neighborhood. My PDIM function is performing nominally, 1200us ON every 120Hz. Rsense set to 150mOhms to get LED current = 2A.
Why does…
Part Number: TPS92512HV Why is the output capacitor connected in parallel with the LEDs, instead of between Vout and GND? My intuition tells me that the output capacitor then filters all switching noise away form the LEDs, but back through Rsense. That…
Part Number: TPS92512HV I doubled the output capacitance from 2.2uF to 4.7uF and the output voltage ripple did not change at all. I would expect some reduction. The ripple magnitude I am seeing is ~2Vpp arcoss Rsense. This leads me to believe that I large…
Part Number: TPS92512HV
I am an LED controller developer.
I am trying to develop using tps92512h.
I want to set the Vout voltage to about 47V. But Vout Voltage is about 40V.
How to set Vout voltage?
The basic design refers to the reference circuit…
Part Number: TPS92512HV Using an LED string of 12 LEDs, with a forward voltage of 3.15V (Vout = 38.1V), at a certain point the LEDs don't conduct and there is a large amount of charge in the output capacitor. Is there a way to use a bleed off resistor…
Part Number: TPS92512HV Other Parts Discussed in Thread: TPS92661-Q1 , , TPS92662-Q1 , LM3409 , TPS92512 , TPS92515 , TPS92518 , TPS92640 Hello guys,
One of my customer is wants to driver their LED with 2.5A using TPS92512HV. Also they want to use TPS92661-Q1…
Part Number: TPS92512HV Other Parts Discussed in Thread: TPS92512EVM-001 Hi,
There is a diode D1 in the user guide of TPS92512EVM-001:
1. What is the diode use for?
2. What if remove this diode from circuit?
Thank you.
Part Number: TPS92512HV Hi
TPS92512HV now is failed on EMI testing, CISPR25 CLASS 3 CE failed after 30MHz,
Could you help to check that if there any could improve EMI performance?
Thank you.
+27V.pdf -27V.pdf -27V Remove snubber.pdf +13.5V.pdf -13.5V.pdf
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Part Number: TPS92512HV Previously was pulsing LEDs for 1200us ON-time every 120Hz, with no issue (PWM duty cycle = ~14.4%). Tutring duty cycle up to 95% resulted in either TPS92512HV or catch diode blowing up on board. Output pins of IC now measures…
Part Number: TPS92512HV hi all,
a customer of mine is experiencing high IC temperature w/ TPS92512HV, under these working conditions:
- VIN = 45...51V
- LED - 43V, 1.05Amp
- FSW = 500KHz
- L = 68uH, ISAT = 2Amp
for what I can see, it seems VIN min too…