HV9923

HV9921/HV9922/HV9923 Initial Release 3-Pin Switch-Mode LED Lamp Driver ICs Features Constant Output Current: o HV9921 – 20mA o HV9922 – 50mA o HV9923 – 30mA Universal 85-264VAC Operation Fixed OFF-Time Buck Converter www.DataSheet4U.com Internal 500V Power MOSFET General Description The HV9921/22/23 are pulse width modulated (PWM) high-efficiency LED driver control ICs. They allow efficient operation of LED strings from voltage sources ranging up to 400VDC. The HV9921/22/23 include 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 HV9921, 50mA for HV9922, and 30mA for the HV9923. The peak current control scheme provides good regulation of the output current throughout the universal AC line voltage range of 85 to 264VAC or DC input voltage of 20 to 400V. Applications Decorative Lighting Low Power Lighting Fixtures Typical Application Circuit HV9921/22/23 NR092005 1 HV9921/HV9922/HV9923 Absolute Maximum Ratings Supply Voltage, VDD Supply Current, IDD Operating Ambient Temperature Range Operating Junction Temperature Range Storage Temperature Range Power Dissipation @ 25°C, TO-92 Power Dissipation @ 25°C, SOT-89 -0.3 to +10V +5mA -40°C to +85°C -40° to +125°C -65° to +150°C 740mW 1600mW† HV9921 HV9922 HV9923 Ordering Information DEVICE Package Options TO-92 HV9921N3-...