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HV9921

3-PIN Switch Mode LED Lamp Driver IC

Status: In Production

Features:

  • Constant output current: 20mA
  • Universal 85 - 265VAC operation
  • Fixed off-time buck converter
  • Internal 475V power MOSFET
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The HV9921 is a pulse width modulated (PWM) high-efficiency LED driver control IC. It allows efficient operation of LED strings from voltage sources ranging up to 400VDC. The HV9921 includes an internal high voltage switching MOSFET controlled with fixed off-time (TOFF) of approximately 10.5μs. 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. The peak current control scheme provides good regulation of the output current throughout the universal AC line voltage range of 85 to 265VAC or DC input voltage of 20 to 400V.

Additional Features
  • Constant output current: 20mA
  • Universal 85 - 265VAC operation
  • Fixed off-time buck converter
  • Internal 475V power MOSFET
Parametrics
Name
Value
Topology
Buck
+Vin min (V)
20
+Vin max (V)
400
Output Current
20mA
Package
TO-92, SOT-89
Product Type
Off Line
Type
Switch-Mode
Operating Iq (µA)
0.2
Θja (C/W)
132, 133

Documents

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Software Library

User Guides

06/25/2014
327KB

Development Environment

  • Demo & Evaluation Boards
  • Software Libraries
  • Application Examples
Demo & Evaluation Boards
HV9921DB1 Demo Board
HV9921DB1 Demo Board ( HV9921DB1 )

The HV9921DB1 demoboard is a complete LED power driver to supply a string of LEDs using the HV9921, an integrated 3-pin high input voltage constant-current buck regulator IC. The HV9921 integrates a 500V switching MOSFET and can operate directly from the rectified universal AC line voltage range of 80 to 265VAC.

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Software Libraries
Analog Simulation - HV9921

The HV9921 is a pulse width modulated (PWM) high-efficiency LED driver control IC. It allows efficient operation of LED strings from voltage sources ranging up to 400VDC.  The output current...

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
HV9921N8-G
0.051800
0.132000
3
SOT-89
-
Matte Tin
e3
HV9921N3-G
0.203400
0.219000
3
TO-92
-
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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