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| LM3402_15 Datasheet, PDF (1/39 Pages) Texas Instruments – 0.5A Constant Current Buck Regulator | |||
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LM3402, LM3402HV
SNVS450F â SEPTEMBER 2006 â REVISED OCTOBER 2015
LM3402/HV 0.5-A Constant Current Buck Regulator for Driving High Power LEDs
1 Features
â¢1 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
2 Applications
⢠LED Drivers
⢠Constant Current Source
⢠Automotive Lighting
⢠General Illumination
⢠Industrial Lighting
3 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM3402/HV
VSSOP (8)
HSOP (8)
3.00 mm à 3.00 mm
4.89 mm à 3.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Diagram
CB
VIN
L1
VIN
BOOT
SW
CIN
RON
D1
RON
IF
LM3402/02HV
CS
DIM
GND
VCC
RSNS
CF
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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