Details

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BUY LM3409MY https://www.utsource.net/itm/p/4737854.html
PFET Buck Controller for High Power LED Drives

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Operating Range	3.0	-	42.0	V
Output Current	IOUT	Continuous	-	1.0	1.5	A
LED Current Accuracy			-	卤6%	-
PWM Dimming Frequency	fDIM		100	-	2000	Hz
Control Method			-	PWM	-
Efficiency	畏	Typical	-	87%	-	%
Operating Temperature	TOPR	Junction Temp	-40	-	125	掳C

Instructions for LM3409MY

1. Power Supply Connection:

   • Connect the input voltage (VIN) to a power supply within the range of 3V to 42V.

2. LED Connection:

   • Ensure the LED current is set according to the desired output, not exceeding 1.5A continuous.

3. PWM Dimming Setup:

   • Configure the PWM dimming frequency between 100Hz and 2kHz for optimal performance.

4. Thermal Management:

   • Operate the device within the temperature range of -40掳C to 125掳C. Ensure adequate heat sinking if operating near the upper limit.

5. Current Accuracy:

   • The device maintains an accuracy of 卤6% in LED current regulation. Adjust external components as necessary to meet specific requirements.

6. Efficiency Consideration:

   • The typical efficiency of 87% should be considered when designing the power supply system to ensure sufficient power delivery.

Note: Always refer to the manufacturer's datasheet for detailed specifications and application notes.

(For reference only)