Test Circuit; Block Diagram - TDK-Lambda CHVM3 Series Instruction Manual

■ Test circuit

Warning 1: The ground line (2pin, 5pin) between the input/output, and the case are internally connected.
Warning 2: Vref is 4V ±0.3V (When external VR=5KΩ)

■ Block diagram

12V
CHVM
F1
1
+Vin Vout (+ or -）
+
12V
C1
-Vin
2
Vref
4
（OPEN）
＋Vin
High-voltage
DC-AC
oscillation
converter
1 transformer
Control IC
＋
Output voltage control
Over current protection
Standard voltage
generating part
－Vin
2
Vref 4
External voltage
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6
C2
Load
5
Vout (Com)
Vcont
C1 =47μ F
C2=4700 pF
3
+
Output voltage control
(Apply 0V to 4V)
Vout (＋ or -）
High-voltage
rectifier
6
5
Vout(Com)
Voltage detection
Case
Vcont
3
（0～4V）
＋
or
VR （5kΩ）
TDK­Lambda
CHVM3 Series
INSTRUCTION MANUAL
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