Details

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BUY LM3407MYX https://www.utsource.net/itm/p/12607400.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Operating Range	2.7	-	5.5	V
Output Current	IOUT	Continuous	-	350	-	mA
Peak Current Limit	ILIM		-	1.4	-	A
Forward Voltage (LED)	VF	@ IF = 350mA	2.8	3.4	4.0	V
Quiescent Current	IQ	VIN = 5V, No Load	-	60	-	渭A
Shutdown Current	ISD	VIN = 5V	-	1	-	渭A
PWM Frequency	fPWM		-	300	1000	kHz
Thermal Shutdown	TSD		-	160	-	掳C

Instructions for LM3407MYX

1. Input Voltage Setup:

   • Ensure the input voltage is within the range of 2.7V to 5.5V.
   • Use appropriate decoupling capacitors near the input pin to stabilize the supply.

2. Output Current Configuration:

   • The device can deliver a continuous output current up to 350mA.
   • For higher currents, ensure adequate heat dissipation.

3. Peak Current Limiting:

   • The peak current limit is set internally at approximately 1.4A.
   • This helps protect the device from short circuits and overcurrent conditions.

4. Forward Voltage Consideration:

   • The forward voltage drop across the LED should be considered when designing the circuit.
   • Typically ranges from 2.8V to 4.0V at full load.

5. Quiescent and Shutdown Currents:

   • In normal operation, the quiescent current is around 60渭A.
   • When in shutdown mode, the current drops to about 1渭A.

6. PWM Control:

   • The device supports PWM frequency from 300kHz to 1MHz.
   • This allows for dimming control without affecting the efficiency significantly.

7. Thermal Protection:

   • The thermal shutdown activates at approximately 160掳C to prevent damage due to overheating.
   • Ensure proper ventilation or heatsinking if operating in high ambient temperatures.

(For reference only)