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JW1221A - Controller for Adaptive 100/120Hz Current Ripple Removing Circuit

General Description

JW1221A is a controller for driving external NMOSFET to remove the 100/120Hz LED current ripple on AC/DC power by a capacitor between VC and GND.

The adaptive technology of JW1221A ensures minimum power dissipation on NMOSFET while removing LED current ripple.

Key Features

  • Controller for adaptive 100/120Hz current ripple remover Built-in zener diode for input voltage clamping VG output voltage high to 10V Programmable amplitude of LED current ripple Programmable maximum cathode voltage of LED Programmable maximum LED current Short protection Over temperature protection SOT23-6 Package.

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Datasheet Details

Part number JW1221A
Manufacturer JoulWatt
File Size 704.90 KB
Description Controller for Adaptive 100/120Hz Current Ripple Removing Circuit
Datasheet download datasheet JW1221A Datasheet

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Full PDF Text Transcription (Reference)

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JW1221A Parameters Subject to Change Without Notice DESCRIPTION JW1221A is a controller for driving external NMOSFET to remove the 100/120Hz LED current ripple on AC/DC power by a capacitor between VC and GND. The adaptive technology of JW1221A ensures minimum power dissipation on NMOSFET while removing LED current ripple. JW1221A clamps the input voltage on VIN pin by 30V. Only one resistor is needed when the output voltage of AC/DC power is higher than the VIN clamp threshold. JW1221A allows user to setup maximum LED current by the sensing resistor between the source of NMOSFET and ground, which protects NMOSFET from being damaged when LED short connected or hot-plug.