MXHV9910
I
NTEGRATED
C
IRCUITS
D
IVISION
265VAC Demo Board
LED-
350mA max
LED+
VDD MONITOR
Vin
90 to 265 VAC
EXTERNAL POWER
RA1
- External
Current Sense
Threshold Adjust
Vin
Warning:
This demonstration board must
be powered through an isolation
transformer before connecting to
any external AC instrumentation.
JP1
- EXTERNAL PWMD CONTROL INPUT
Connecting the PWMD pin to VDD enables
the converter. Applying a PWM TTL signal
between the PWMD pin and GND adjusts the
average output current to the LEDs according
to the duty cycle.
LD MONITOR
The LD pin is connected to
the wiper of RA1. LED current
may be reduced in a linear
fashion by adjusting RA1.
J2
V
IN
FUSE F2
2A
BR1
AC
AC
df04s
V
IN
NTC1
D1
BYV26B
2
L1
4.7mH
J1
LED+
LED CONNECTION
LED-
R4
0.56Ω
1
JP1
2
PWMD
3
Q1
IRF840AS
3
1
C1
0.1μF
400V
C2
22μF
400V
1
2
3
4
V
IN
CS
PGND
GATE
DUT1
C4
0.1μF
25V
MXHV9910
8-PIN SOIC
RT
LD
V
DD
PWMD
8
7
6
5
R3
0Ω
RA1
5kΩ
R2
51kΩ
C2
2.2μF
16V
R1
402kΩ
V
DD
MONITOR
LD MONITOR
90-265VAC
EXT. POWER
-
+
December 22, 2012
www.ixysic.com
Page
1
I
NTEGRATED
C
IRCUITS
D
IVISION
For additional information please visit
www.ixysic.com
IXYS Integrated Circuits Division makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication and
reserves the right to make changes to specifications and product descriptions at any time without notice. Neither circuit patent licenses or indemnity are expressed
or implied. Except as set forth in IXYS Integrated Circuits Division’s Standard Terms and Conditions of Sale, IXYS Integrated Circuits Division assumes no liability
whatsoever, and disclaims any express or implied warranty relating to its products, including, but not limited to, the implied warranty of merchantability, fitness for a
particular purpose, or infringement of any intellectual property right.
The products described in this document are not designed, intended, authorized, or warranted for use as components in systems intended for surgical implant into
the body, or in other applications intended to support or sustain life, or where malfunction of IXYS Integrated Circuits Division’s product may result in direct physical
harm, injury, or death to a person or severe property or environmental damage. IXYS Integrated Circuits Division reserves the right to discontinue or make changes
to its products at any time without notice.
Specifications: UG-MXHV9910DB265-December 22, 2012
© Copyright 2012, IXYS Integrated Circuits Division
All rights reserved. Printed in USA.
12/22/2012
December 22, 2012
www.ixysic.com
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2
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