HV9922DB2 Supertex, HV9922DB2 Datasheet
HV9922DB2
Manufacturer Part Number
HV9922DB2
Description
Power Management IC Development Tools UNIVERSAL OFF-LINE LED DRIVER DEMOBOARD
Manufacturer
Supertex
Datasheet
1.HV9922DB2.pdf
(2 pages)
Specifications of HV9922DB2
Product
Power Management Development Tools
Factory Pack Quantity
1
Introduction
The Supertex HV9922DB1 demoboard is a complete LED
power driver to supply a string of LEDs using the HV9922,
an integrated 3-pin high input voltage constant-current
buck regulator IC. The HV9922 integrates a 500V switching
MOSFET and can operate directly from the rectified universal
AC line voltage range of 80 to 265VAC.
The current in the LED string is internally programmed to
20mA ±15%. The HV9922DB1 is ideally suited for driving
strings of LEDs having forward voltage from 20 to 30V at
high efficiency (typically 80% at 120VAC).
The HV9922DB1 is a peak current-controlled buck converter
operating with fixed off-time of 10.5µs. Its fixed off-time
control scheme provides good stability and tight regulation of
the LED current throughout the input AC line voltage range.
As its switching frequency varies over the AC line cycle, the
HV9922 inherently introduces frequency dither and simplifies
the compliance with EMI regulations.
Board Layout and Connection Diagram
Connections
LED+: Connect the Anode of the LED string to this pin.
LED-: Connect the Cathode of the LED string to this pin.
AC1, AC2: Connect AC Line to these pins.
LED String
V
I
F
F
= 50mA
= 20 to 30V
Supertex inc.
LED+
LIN
LED-
C0
CIN2
D1
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
LED Driver Demoboard
D4
D2
CIN
Universal Off-line
U1
L1
D5
HV9922
CDD
C2
D3
+
Specifications
Note:
AC Line
80 - 265VAC
Parameter
Input voltage range
Load current
LED string voltage
Conducted EMI
Efficiency
The demoboard is not protected from output open/
short circuit condition. Damage to the demoboard may
occur if the output load is not properly connected.
●
Tel: 408-222-8888
●
www.supertex.com
HV9922DB1
80 - 265VAC
50mA ± 15%
CISPR15
20 ~ 30V
80% typ.
Value
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HV9922DB2 Summary of contents
Page 1
... Introduction The Supertex HV9922DB1 demoboard is a complete LED power driver to supply a string of LEDs using the HV9922, an integrated 3-pin high input voltage constant-current buck regulator IC. The HV9922 integrates a 500V switching MOSFET and can operate directly from the rectified universal AC line voltage range 265VAC. ...
Page 2
... Supertex inc. 2 HV9922DB1 LED Manufacturer Panasonic Panasonic Epcos Epcos Renco Electronics Central Technologies On Semiconductor 1N4005 Diodes, Inc Panasonic Supertex, Inc N/A N/A (website: http//www.supertex.com) Supertex inc. Supertex inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 , if these IN - LED 1 8 Tel: 408-222-8888 www.supertex.com ...