Features
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Internal 40V Startup Regulator
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1A Peak MOSFET Gate Driver
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VIN Range 6V to 40V
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Duty Cycle Limit in Excess of 90%
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Programmable UVLO with Hysteresis
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Cycle-by-Cycle Current Limit
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External Synchronizable (AC-coupled)
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Single Resistor Oscillator Frequency Set
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Slope Compensation
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Adjustable Soft-start
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LLP-12 (3mm x 3mm)
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Description The LM3430 is a high voltage low-side N-channel MOSFET controller. Ideal for use in a boost regulator, the LM3430 can power
the LED backlight in LCD panels, such as in notebook PCs. It contains all of the features needed to implement single ended
primary topologies. Output voltage regulation is based on current-mode control, which eases the design of loop compensation
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 capability including an oscillator frequency range up to
2 MHz and total propagation delays less than 100 ns. Additional features include an error amplifier, precision reference,
line under-voltage lockout, cycle-by-cycle current limit, slope compensation, soft-start, external synchronization capability
and thermal shutdown. The LM3430 is available in the LLP-12 package.
Applications
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LED Backlight Driver (companion to LM3432)
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Boost Converter
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SEPIC Converter
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Also Recommended
| LM3481▲ | No DHC, Vin 2.97V To 48V, MSOP-10 Package |
| LM5020▲ | No DHC, Vin 13V To 100V, MSOP-10 Package, All Other Features Identical |
| LM5022▲ | No DHC, Vin 6V To 60V, MSOP-10 Package, All Other Features Identical |
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LM3481
