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User
’s Guide
BM1Z102FJ-EVK-001
© 2020 ROHM Co., Ltd.
No. 62UG074E Rev.001
2020.04
C1
100n
C7
1n
Prim_GND
IC3
BD50FA1FP3
Gnd
Out
Vin
220u
L1
D3
D1
DA1
DCOUT
ZNR1
C4
2.2u
C5
100n
1
F1
100
R4
100
R2
100
R1
100k
R3
C2
4.7u
C3
220u
C8
1u
ACOUT
VOUT
VOUT
D2
D4
BM2P129TF
IC2
DRAIN
VCC
VOUT-GND
IC1
Vh_AC1
VH_AC2
VH_DC
NC8
NC1
NC2
ACOUT
DCOUT
GND
DSET
VCC
R5
33k
C7
Application Circuit
This evaluation board outputs a zero cross signal.
This evaluation board (BM1Z102FJ) 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.
The DCOUT terminal outputs about 1/100 voltage with the DC voltage after the diode rectification.
.
Figure 3. Application Circuit
Figure 4. Wave form of the input output voltage
Power supply circuit part
Zero cross signal circuit part
Zero cross signal output
IC
Zero cross signal output
GND
DC output
ACOUT
INPUT
DCOUT
5 V / Div
200 V / Div
1 V / Div