Microchip Technology 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. 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.| Part No. | AT9933 |
|---|---|
| Datasheet | AT9933 Download |
| Manufacturer |  Microchip Technology |
| Description | Hysteretic Boost-Buck LED Driver |
| Buy | Stock & Price |
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 LightingAPPLICATIONS
Package TypeGENERAL DESCRIPTION
Input current control enables current limiting during Startup, Input Undervoltage 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. This AT9933-based LED driver is ideal for LED lamps. The part is rated for up to 125°C ambient temperatures. 8-lead SOIC (Top View) See Table 2-1 for pin information. VIN 1 CS1 2 GND 3 GATE 4 8 REF 7 CS2 6 VDD 5 PWMD 2016-2023 Microchip Technology Inc. and its sub...
