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AT9933

Part Number	AT9933
Manufacturer	Microchip
Description	Hysteretic Boost-Buck LED Driver
Published	Jan 15, 2017
Detailed Description	AT9933 Hysteretic Boost-Buck (Ćuk) LED Driver IC with High-Side Current Sensing Features • AEC-Q100 Automotive Qualifi...
Datasheet	AT9933 PDF File

Overview

AT9933 Hysteretic Boost-Buck (Ćuk) LED Driver IC with High-Side Current Sensing Features • AEC-Q100 Automotive Qualified, See Product Identification System • Constant Current LED Driver • Steps Input Voltage Up or Down • Low Electromagnetic Interference (EMI) • Variable Frequency Operation • Internal 75V Linear Regulator • Input and Output Current Sensing • Input Current Limit • Enable and Pulse-width Modulation (PWM) Dimming • Ambient Temperature Rating of up to 125°C Applications • LED Lighting Applications Package Type General Description The AT9933 is a variable frequency PWM controller IC, designed to control an LED lamp driver using a low-noise boost-buck (Ćuk) topology.
It uses patent-pending Hysteretic Current-mode control to regulate both the input and the output currents.
This enables superior input surge immunity without the necessity for complex loop compensation.
Input current control enables current limiting during Startup, Input Undervoltage and Output Overload condit...

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