HONG KONG KEEP BOOMING TECHNOLOGY CO.,LIMITED
HONG KONG KEEP BOOMING TECHNOLOGY CO.,LIMITED
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LM3429MH/NOPB LM3429MHX/NOPB Power Semiconductor Devices LED Driver IC
1 Features
·LM3429-Q1 is AEC-Q100 Grade 1 Qualified for
Automotive Applications
VRange From 4.5V to 75 V
Adjustable Current Sense Voltage
High-Side Current Sensing
2-Ω, 1-A Peak MosFET Gate Driver
Input Undervoltage Protection
Overvoltage Protection
·PWM Dimming
Analog Dimming
Cycle-by-Cycle Current Limit
Programmable SwitchingFrequency
·Low Profile 14-lead HTSSOP Package
Thermal Shutdown
2 Applications
·LED Drivers-BuckBoostBuck-BoostSEPIC
Indoor and Outdoor SSL
Automotive
General lllumination
Constant-Current Regulators
3 Description
The LM3429 is a versatile high voltage N-channel
MosFET controller for LED drivers. It can beeasily
configured in buck.boostbuck-boost and SEPIC
topologies. This flexibility, along with an input voltage
rating of 75Vmakes the LM3429 ideal for
illuminating LEDs in a very diverse large family of
applications.
Adjustable high-side current sense voltage allows for
liaht requlation of the LED current with the highes
efficiency possible. The LM3429 uses Predictive Off
time (PRO) control. which is a combination ofpeak
current-mode control and a predictive off-timer.This
method of control eases the design ofloop
compensation while providing inherent input voltage
feed-forward compensation.
The LM3429 includes a high-voltage startup regulator
that operates over a wide inout range of45vto75
V. The intenal PwM controller is designed for
adjustable switching frequencies of up to2 MHzthus
enabling compact solutions.Additionalfeatures
include analog dimming,PWMdimmingovervoltage
protection.undervoltage lock-outcycle-by-cycle
current limit. and thermal shutdown.