0.5A Constant Current Buck Regulator for High Power LED Drivers - LM3402

LM3402 (ACTIVE)

0.5A Constant Current Buck Regulator for High Power LED Drivers

 

Recommended alternative parts

  • TPS92513  -  1.5A current rating, includes analog dimming and ultra low shutdown supply current

Description

The LM3402/HV are monolithic switching regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, they contain a high-side N-channel MOSFET switch with a current limit of 735 mA (typical) for step-down (Buck) regulators. Hysteretic control with controlled ON-time coupled with an external resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series - parallel connected arrays of LEDs of varying number and type, LED dimming by pulse width modulation (PWM), broken/open LED protection, low-power shutdown and thermal shutdown complete the feature set.

For all available packages, see the orderable addendum at the end of the data sheet.

Features

  • Integrated 0.5-A N-channel MOSFET
  • VIN Range from 6 V to 42 V (LM3402)
  • VIN Range from 6 V to 75 V (LM3402HV)
  • 500 mA Output Current Over Temperature
  • Cycle-by-Cycle Current Limit
  • No Control Loop Compensation Required
  • Separate PWM Dimming and Low Power Shutdown
  • Supports All Ceramic-Output Capacitors and Capacitor-Less Outputs
  • Thermal Shutdown Protection
  • VSSOP, SO PowerPAD Packages

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Parametrics Compare all products in LED Lighting - Illumination

 
Input Voltage (Type)
Vin (Min) (V)
Vin (Max) (V)
Iout (Max) (A)
Vout (Min) (V)
Vout (Max) (V)
Regulated Outputs (#)
Topology
Dimming Method
Power Factor Correction (Min)
Type
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Vref (V)
UVLO Thresholds On/Off (V)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
LM3402
DC/DC   
6   
42   
0.5   
0.2   
40   
1   
Buck   
PWM   
N/A   
Inductive   
20   
1000   
0.6   
0.2   
5.25 / 5.10   
Adjustable Switch Frequency
Enable/Shutdown
Integrated Switch
Thermal Shutdown   
Catalog   
-40 to 125   
8SO PowerPAD
8VSSOP   

WEBENCH® Designer LM3402

  V in Lower V in Upper
6.0 ≤  V  V ≤ 42.0
Ambient Temp  °C ≤ 100°C
Light Output (optional)  Lumens