LM3429MHX 42V 1.5A Buck LED Driver 6-42V Input Analog/PWM Dimming 1MHz TSSOP-14 -40°C to +125°C AEC-Q100

LM3429MHX

Features

• LM3429-Q1 is AEC-Q100 Grade 1 Qualified for 1 Automotive Applications

• VIN Range From 4.5 V to 75 V

• Adjustable Current Sense Voltage

• High-Side Current Sensing

• 2-Ω, 1-A Peak MosFET Gate Driver

• Input Undervoltage Protection

• Overvoltage Protection

• PWMDimming

• Analog Dimming

• Cycle-by-Cycle Current Limit

• Programmable Switching Frequency

• LowProfile 14-lead HTSSOP Package

• Thermal Shutdown

Applications

• LEDDrivers- Buck, Boost, Buck-Boost, SEPIC

• Indoor and Outdoor SSL

• Automotive

• General Illumination

• Constant-Current Regulators

Description

The LM3429 is a versatile high voltage N-channel MosFET controller for LED drivers. It can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75V, makes the LM3429 ideal for illuminating LEDs in a very diverse, large family of applications.

Adjustable high-side current sense voltage allows for tight regulation of the LED current with the highest efficiency possible. The LM3429 uses Predictive Off time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation.

The LM3429 includes a high-voltage startup regulator that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for adjustable switching frequencies of up to 2 MHz, thus enabling compact solutions. Additional features include analog dimming, PWM dimming, overvoltage protection, undervoltage lock-out, cycle-by-cycle current limit, and thermal shutdown.

Information

Drawing

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