Part Number: TPS923653 Tool/software: Hi team
I want to use a TPS923653 to charge a 1000uF 50V capacitor as an energy source for emergency shutdown of a customer application. Input voltage can be between 18V and 45V, but it won't change during operation…
Part Number: TPS923653 Tool/software: Looking at the dimming ratios in the datasheet, is there any issue hitting the 1M:1 dimming ratio when the max string current is only 100mA?
Thanks!
Hi Ryu,
Ryu Yamashita said: Let me confirm one point just to be sure. In the data sheet “8.3.5.2 Analog Dimming” it says that the minimum pulse for the ADIM/HD pin is 100ns. But you tell me it is 150ns. Which is correct?
Datasheet is correct. Sorry, I made…
Part Number: TPS923653 Tool/software: Hi Steven,
I built a prototype SMPS using TPS923653DRRR switching IC. I set the switching frequency to 415kHz, the output 140mA constant current, my main inductor was 22uH. I wanted to drive 16LEDs in series (45V…
Hi Tom,
Sorry for the late response.
Tom Schultz said: Adjusting the ROVP certainly helped reducing the open load voltage (although I would expect the device to shut down instead of keeping the open load voltage).
The device will not shut down itself…
Other Parts Discussed in Thread: TPS923652 , TPS923653 , TPS923654 , TPS923655 How to design the CSP and CSN pin components for TPS923655 / TPS923654 / TPS923653 / TPS923652?
Part Number: TPS923653 Tool/software: Dear Texas Instruments Support Team,
I am currently working on a project that uses the TPS923653 LED driver as a boost converter to power an LED panel. The circuit works well when the EN/PWM and ADIM pins are both…
Part Number: TPS923653 Tool/software: Hello everyone,
I have previously used the TPS923653 to drive an LED panel without any dimming capabilities. This time, I wanted to use it with an MCU (ATTINY806) to control the dimming via a PWM signal along with…
Part Number: TPS923653 Other Parts Discussed in Thread: TPS923652 , Tool/software: Dear TI Forum,
I would like to understand what switching IC would be suitable and what schematic would work the best in order to have a switch mode power supply that can…
Part Number: TPS923653 Tool/software: If the TPS923653 ADIM/HD and EN/PWM pins are both low, the device is in the OFF mode and the Boost is not running. There is still a direct path through the inductor - Schottky diode - Rsense to the LEDs which could…