LM3406 Datasheet PDF


Part Number

LM3406

Description

1.5A Constant Current Buck Regulator

Manufacture

National Semiconductor

Total Page 30 Pages
PDF Download
Download LM3406 Datasheet PDF


Features Datasheet pdf LM3406/06HV 1.5A Constant Current Buck R egulator for Driving High Power LEDs L M3406/06HV February 8, 2010 1.5A Cons tant Current Buck Regulator for Driving High Power LEDs General Description T he LM3406/06HV are monolithic switching regulators designed to deliver constan t currents to high power LEDs. Ideal fo r automotive, industrial, and general l ighting applications, they contain a hi gh-side N-channel MOSFET switch with a current limit of 2.0A (typical) for ste p-down (Buck) regulators. Controlled on -time with true average current and an external current sense resistor allow t he converter output voltage to adjust a s needed to deliver a constant current to series and series-parallel connec.
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LM3406 Datasheet
LM3406/06HV
February 8, 2010
1.5A Constant Current Buck Regulator for Driving High
Power LEDs
General Description
The LM3406/06HV are monolithic switching regulators de-
signed 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 2.0A (typical) for step-down (Buck) regulators.
Controlled on-time with true average current and an external
current sense resistor allow the converter output voltage to
adjust as needed to deliver a constant current to series and
series-parallel connected LED arrays of varying number and
type. LED dimming via pulse width modulation (PWM) is
achieved using a dedicated logic pin or by PWM of the power
input voltage. The product feature set is rounded out with low-
power shutdown and thermal shutdown protection.
Features
Integrated 2.0A MOSFET
VIN Range 6V to 42V (LM3406)
VIN Range 6V to 75V (LM3406HV)
True average output current control
1.7A Minimum Output Current Limit Over Temperature
Cycle-by-Cycle Current Limit
PWM Dimming with Dedicated Logic Input
PWM Dimming with Power Input Voltage
Simple Control Loop Compensation
Low Power Shutdown
Supports All-Ceramic Output Capacitors and Capacitor-
less Outputs
Thermal Shutdown Protection
eTSSOP-14 Package
Applications
LED Driver
Constant Current Source
Automotive Lighting
General Illumination
Industrial Lightingwww.DataSheet.net/
Typical Application
© 2010 National Semiconductor Corporation 300203
30020301
www.national.com
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