Part Number: LM3407 Other Parts Discussed in Thread: TPS923652 , TPS923653 , TPS92200 Hi Team,
If PWM is used to control 24V/280mA LED, is LM3407 feasible? If possible, are there any recommended specifications?
Part Number: LM3407 My customer has a product that uses the LM3407. But the voltage supply of the product is changing from 26V to 31V. Please suggest another part with the same functionality that can handle Vin greater than 30V.
I need something that…
Part Number: LM3407 Other Parts Discussed in Thread: TPS92200 Hello TI-Team,
we need to power a backlight of an Display with the following specs:
Vin=24VDC
Backlight: Vf=19,2V If=40mA 2 LED strings á 6 LEDs
I thougt, the LM3407 might be a good…
Part Number: LM3407 Using the LM3407 at low current setting (60mA, maybe lower). We would like to increase the inductor value to 47uH to stay in continuous conduction. Datasheet recommends 22uH and 4.7uF output C. Any concerns (stability or otherwise…
Part Number: LM3407 I have an LM3407 design that operates at low current. The inductor was chosen based on the datasheet equations and verified with the design calculator. The sense resistor waveforms look appropriate, and the current has been measured…
Part Number: LM3407 Hello,
I have a customer that is looking at the LM3407 and it is not clear what the maximum string length for the LEDs is. The picture on the first page shows "1 to 7 LEDs" but then it says the output voltage range can be 90% the…
Hi Irwin,
I was using a DVM to measure the voltages. I had checked the LEDs lit from an external supply and they did. However, I had not spotted that the D703 diode had been populated incorrectly.
The marking on the board is correct, but the diode…
Hello Sara,
This is a switching regulator so there is no drop in voltage like a linear regulator would do. The LM3407 charges the inductor when the MOSFET is on and when the MOSFET is off it discharges. Ignoring losses there are two V=L*(di/dt), one…
