IZ9921, IZ9922, IZ9923 HIGH-VOLTAGE LED DRIVER WITH BUILT-IN MOSFET SWITCH IZ9921, IZ9922, IZ9923 are high-voltage LED driver control ICs with built-in MOSFET switch and intended for LED lighting control.
They allow efficient operation of LED strings from voltage sources ranging up to 400VDC.
The IZ9921/22 includes an internal high-voltage switching MOSFET controlled with fixed off-time TOFF of approximately 10µs.
The LED string is driven at constant current, thus providing constant light output and enhanced reliability.
The output current is internally fixed at 20mA for IZ9921, 50mA for IZ9922 and 30mA for IZ9923.
The peak current control scheme provides good regulation of the output curren...

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