AT9933 Datasheet PDF

Supertex AT9933

The AT9933 is a variable frequency PWM controller IC, designed to control an LED lamp driver using a low-noise boost-buck (Ćuk) topology. The AT9933 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.

Part No.	AT9933
Datasheet	AT9933 Download
Manufacturer	Supertex
Description	Hysteretic Boost-Buck (cuk) LED Driver
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FEATURES

► ► ► ► ► ► ► ► ► ► Constant current LED Driver Steps input voltage Up or Down Low EMI Variable frequency operation Internal 8 to 100V linear regulator Input and output current sensing Input current limit Enable & PWM dimming Ambient temperature rating up to 125°C Meets AEC-Q100 requirements

GENERAL DESCRIPTION

Input current control enables current limiting during startup, input under-voltage and output overload conditions. The AT9933 provides a low-frequency PWM dimming input that can accept an external control signal with a duty cycle of 0 - 100% and a high dimming ratio. The AT9933 based LED driver is ideal for automotive LED lamps. The part is rated for up to 125°C ambient temperatures and is AEC-Q100-Compliant.

APPLICATIONS

► Automotive LED Lighting Reference Documents ► AEC-Q100 Rev. F, 7/18/2003 ► SAE J1752-3 Typical Application Circuit D2 (optional) L1 RD VDC Q1 RCS1 RCS2 RS1 C2 VIN GATE CS1 GND VDD PWMD CS2 REF C3 RS2 CD D1 + C1 L2 - D3 VO RREF1 RREF2 AT9933 AT9933 Or...

AT9933 Datasheets by Manufacturer

1 datasheets

Part Number	Manufacturer
AT9933	Microchip Technology