LM3430SD

• Internal 40V start-up regulator
• 1A peak MOSFET gate driver
• V_INRange 6V to 40V
• More than 90% of the current value period limit
• Programmable UVLO and hysteresis
• Cycle-by-cycle current limit
• Externally synchronizable (AC coupling)
• Single resistance oscillator frequency setting
• Slope compensation
• Adjustable soft-start
• LLP - 12 (3 × 3 mm)

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The LM3430 is a high voltage low side N-channel MOSFET controller. Ideal for use in boost regulators, the LM3430 can drive LED backlights in LCD panels such as notebook computers. It contains all the functionality needed to implement a single-ended primary topology. Output voltage regulation is based on current mode control, simplifying loop compensation design while providing inherent input voltage feed-forward. The LM3430 includes a start-up regulator that operates over a wide input range of 6V to 40V. The PWM controller is designed for high-speed capabilities, including oscillator frequency ranges up to 2 MHz and total propagation delays of less than 100 nanoseconds. Other features include an error amplifier, high-precision reference, line undervoltage lockout, cycle-by-cycle current limit, ramp compensation, soft-start, external synchronization capability, and thermal shutdown. The LM3430 is available in an LLP-12 package.

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• LED Backlight Driver (Mate LM3432)
• Boost converter
• SEPIC converter