LM3402HVMR Datasheet, PDF (1/38 Pages) Texas Instruments – 0.5A Constant Current Buck Regulator for Driving High Power LEDs

LM3402, LM3402HV
www.ti.com
SNVS450E – SEPTEMBER 2006 – REVISED MAY 2013
0.5A Constant Current Buck Regulator for Driving High Power LEDs
Check for Samples: LM3402, LM3402HV
FEATURES
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•2 Integrated 0.5A N-channel MOSFET
• V_IN Range from 6V to 42V (LM3402)
• V_IN Range from 6V to 75V (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
DESCRIPTION
The LM3402/02HV 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.
APPLICATIONS
• LED Driver
• Constant Current Source
• Automotive Lighting
• General Illumination
• Industrial Lighting
Typical Application
C_B
V_IN
L1
VIN
BOOT
SW
C_IN
R_ON
D1
RON
I_F
LM3402/02HV
CS
DIM
GND
VCC
R_SNS
C_F
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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