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User
’
s Guide
BM1Z002FJ-EVK-002
© 2020 ROHM Co., Ltd.
No. 62UG087E Rev.001
2020.03
Application Circuit
This evaluation board outputs a zero cross signal.
Output a zero cross point of the AC voltage from ACOUT pins by monitoring the voltage between VH_AC1 pins and the VH_AC2
pins of IC1.
600V withstand monitor circuit is integrated at VH_AC1 pin and VH_AC2 pin to realize high reliabitity and low power consumption.
ACOUT pin output 5V as high level and 0V as low level.
Power supply circuit part
Zero cross signal circuit part
Figure 3. Application Circuit
V
ACOUT
5 V / Div
V
IN
200 V / Div
Figure 4. Wave form of the input output voltage
BM2P129T
U2
DRAIN
VCC
VOUT-GND
BM1Z002FJ
100
R1
220u
L1
RFN1LAM6S
D3
D1
DA1
GND
ZNR1
C6
C4
2.2u
C7
100n
1
F1
100k
R5
3.3k
R8
100k
R4
C2
4.7u
C3
220u
VCC
ACOUT
Vin
Vin
D2
D4
PC1
Q1
100
R6
C1
100n
100
R2
R3
U1
VH
_AC
1
VH
_AC
2
NC
AC
OU
T
DS
E
T
GN
D
VC
C
Power supply circuit part
BM2P129T
U2
DRAIN
VCC
VOUT-
T
T GND
220u
L1
RFN1LAM6S
D3
C6
C4
2.2u
C2
4.7u
C3
220u
D4
Zero cross signal output
