HV9901_08 查看數據表（PDF） - Supertex Inc
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HV9901_08 Datasheet PDF : 7 Pages
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Functional Block Diagram
1N4148
See Note 1.
VIN
1
100nF
A
UVLO
C
HV9901
VDD
16
4.7 µF
Bandgap 1.25 V
Reference
VREF
15
100nF
R HDa
LED
10K
VN2460N8
VDD
GT
4
215ns
Delay
CS
5.5k Ω
5
RS
COM
6
SYNC
7
Rosc
RT
8
R
2R
S
Q
R
R
C
Low Limit
High Limit
C
VDD
VDD
40 µA
Oscillator
shut down
High Duty
Cycle
Oscillator
Notes:
1. This diode and bridge rectifier required only for AC operation.
2. For non-isolated AC operation the entire circuit must be floating.
3. All comparators have open drain outputs.
14
HOLD/DELAY
CHD
R HDb
1.25V
FB
13
VDD
R FBb
R FBa
12
VCC
100nF
5V
µP
ENI
11
ENO
10
POL
9
● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
6
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