How it Works
ROHM
Loading...
BM1Z002FJ
Datasheet
21 pgs1.17 Mb0
Table of contents
Loading...

ROHM BM1Z002FJ Datasheet

Download
TSZ02201-0F1F0A200600-1-2
© 2019 ROHM Co., Ltd. All rights reserved.
12.Mar.2020 Rev.001
Product Name
ACOUT Pin Output Waveform
BM1Z002FJ
Pulse
BM1Z003FJ
Edge
AC/DC
BM2P Series
DC/DC
BD9E Series
Motor
Filter
VCC
VH_AC2
GND
ACOUT
VH_AC1
BM1Z00xFJ
μ-Com
Motor Driver
Others
DSET
t
Datashee
AC Voltage Zero Cross Detection IC
BM1Z002FJ BM1Z003FJ

General Description

This IC outputs the AC voltage zero cross timing detection with high accuracy. By eliminating the need for photocoupler and external components required in conventional applications, it is possible to reduce the number of parts drastically and realize compact and highly reliable power supply applications. In addition, this IC can reduce standby power largely in comparison with an existing photocoupler control.

Features

Key Specifications

VCC Input Power Supply Voltage Range:
-0.3 V to +29 V
VH_AC1 and VH_AC2 Pins Operation Voltage:
600 V (Max)
Circuit Current at Standby: 50 µA (Typ) Circuit Current at Operation: 160 µA (Typ) Operating Temperature Range: -40 °C to +105 °C

Package W (Typ) x D (Typ) x H (Max)

SOP-J7S 4.9 mm x 6.0 mm x 1.65 mm
AC Zero Cross Detection Function
Eliminates Photocoupler 600 V High Voltage Monitor Modifiable Zero Cross Delay Time n Channel Open Drain Output
VCC Under Voltage Locked Out (VCC UVLO)

Applications

Household Appliances such as Rice Cooker and
Dryer, etc.

Lineup

Typical Application Circuit

Pitch (Typ): 1.27 mm
〇Product structure : Silicon integrated circuit 〇This product has no designed protection against radioactive rays.
1/18
BM1Z002FJ BM1Z003FJ
TSZ02201-0F1F0A200600-1-2
© 2019 ROHM Co., Ltd. All rights reserved.
12.Mar.2020 Rev.001
www.rohm.com
Pin No.
Pin Name
Function
1
ACOUT
AC voltage zero cross timing output pin
2
DSET
AC voltage zero cross delay time setting pin
3
GND
Ground pin
4
VCC
Power supply pin
5
N.C.
Non connection (Do not connect to any pins.)
6
VH_AC2
AC voltage input 2 pin
7
VH_AC1
AC voltage input 1 pin
7
6
2
5
1
4
3
VCC
VH_AC2
GND
ACOUT
VH_AC1
DSET
N. C.

Pin Configuration

(TOP VIEW)

Pin Descriptions

2/18
BM1Z002FJ BM1Z003FJ
TSZ02201-0F1F0A200600-1-2
© 2019 ROHM Co., Ltd. All rights reserved.
12.Mar.2020 Rev.001
www.rohm.com
AC/DC
DC/DC
Motor
Motor Driver
Filter
VCC
VH_AC1
GND
ACOUT
UVLO
600 V
AC Monitor
Internal
Reg.
Zero Cross
Detection
VH_AC2
μ-Com
Others
Timing
Adjustment
DSET

Block Diagram

3/18
BM1Z002FJ BM1Z003FJ
TSZ02201-0F1F0A200600-1-2
© 2019 ROHM Co., Ltd. All rights reserved.
12.Mar.2020 Rev.001
www.rohm.com
AC Input
L
N
BM1Z00xFJ
D1
D2
D3
D4
L > N D2, D3 ON L < N D1, D4 ON
VH_AC1
GND
VP
ACOUT
Power Supply
VH_AC2
VH_AC1 – GND
Voltage
0 V
0 V
AC Voltage × 1.41
AC Voltage × 1.41
ACOUT – GND
Voltage
VH_AC2 – GND
Voltage
L - N
Voltage
VH_AC1 – GND
Voltage
0 V
0 V
AC Voltage × 1.41
AC Voltage × 1.41
ACOUT – GND
Voltage
VH_AC2 – GND
Voltage
L - N
Voltage
t
WIDTH

Description of Blocks

1. AC Voltage Zero Cross Detection

By monitoring the voltage between the VH_AC1 and VH_AC2 pins, this IC outputs the zero cross point of AC voltage from the ACOUT pin. These pins have a built-in monitor circuit that tolerates 600 V and they realize high reliability and low power consumption. The ACOUT pin performs an n channel open drain output and this makes it possible to support various applications. It is necessary for the VH_AC1 pin to be connected to the N side of the AC input and for the VH_AC2 pin to be connected to the L side of the AC input.
Figure 1. Example of Circuit Diagram
Figure 2. Output Waveform (BM1Z002FJ) Figure 3. Output Waveform (BM1Z003FJ)
4/18
BM1Z002FJ BM1Z003FJ
TSZ02201-0F1F0A200600-1-2
© 2019 ROHM Co., Ltd. All rights reserved.
12.Mar.2020 Rev.001
www.rohm.com
A B C D E
VCC pin
Voltage
V
UVLO1
0 V
L - N
Voltage
VP
VH_AC1 – GND
Voltage
VH_AC2 – GND
Voltage
ACOUT – GND
Voltage
1st cycle 2nd cycle 3rd cycle
Zero Cross Points
1. AC Voltage Zero Cross Detection – continued

1.1 Startup Sequence

Show a start sequence in Figure 4.
A: AC Input voltage is applied. B: When the VCC pin voltage becomes more than V C: The VH_AC1 and VH_AC2 pins voltage in 1st cycle is detected after the IC starts operation. D: The VH_AC1 and VH_AC2 pins voltage in 2nd cycle is detected and the internal arithmetic of IC is completed. E: After the arithmetic, the first positive edge point of the ACOUT pin voltage is detected. After that, the IC repeats
the high-to-low pulse operation at the zero cross points. (The zero cross detection function starts to operate at 3rd cycle from starting IC’s operation.)
Figure 4. Start Sequence
, the IC starts to operate.
UVLO1
5/18
BM1Z002FJ BM1Z003FJ
TSZ02201-0F1F0A200600-1-2
© 2019 ROHM Co., Ltd. All rights reserved.
12.Mar.2020 Rev.001
www.rohm.com
VH_AC1 – GND
Voltage
0 V
ACOUT – GND
Voltage
V
ACUVLO
Low
HiZ
VH_AC1 – GND
Voltage
0 V
ACOUT – GND
Voltage
<t
AC1
VH_AC2 – GND
Voltage
Low
HiZ
VH_AC1 – GND
Voltage
0 V
ACOUT – GND
Voltage
VH_AC2 – GND
Voltage
Low
HiZ
<t
AC2
1. AC Voltage Zero Cross Detection – continued

1.2 VH_AC1 Pin UVLO

In case that the peak voltage of the VH_AC1 pin is V
or less, the ACOUT pin voltage is defined as Hiz.
ACUVLO

1.3 VH_AC1 and VH_AC2 Pins Noise Filter

This IC has two noise filters. Noise Filter 1 (t
): In case of the ACOUT pin voltage = Hiz, signals of pulse width < t
AC1
Noise Filter 2 (t
): In case of the ACOUT pin voltage = Low, signals of pulse width < t
AC2
Figure 5. VH_AC1 Pin UVLO
Figure 6. VH_AC1 and VH_AC2 Pins Noise Filter 1
is not accepted.
AC1
is not accepted.
AC2
Figure 7. VH_AC1 and VH_AC2 Pins Noise Filter 2
6/18
BM1Z002FJ BM1Z003FJ
TSZ02201-0F1F0A200600-1-2
© 2019 ROHM Co., Ltd. All rights reserved.
12.Mar.2020 Rev.001
www.rohm.com
R
DSET
Zero Cross Delay Time t
DELAY
(μs)
Open
0
330 kΩ
+200
68 kΩ
-200
GND
-480
VREF
Internal Control
Circuit
R
DSET
DSET
ACOUT – GND
Voltage
L – N
Voltage
ACOUT – GND
Voltage
L – N
Voltage
t
DELAY
t
DELAY
t
DELAY
t
DELAY
1. AC Voltage Zero Cross Detection – continued

1.4 DSET Pin Setting

The DSET pin is connected to internal power supply VREF and the DSET pin voltage is depended on the value of R
. The zero cross delay time is set by the level of the DSET pin. Set it to one of the values in Table 1.
DSET
Figure 8. Circuit Diagram of DSET Pin
Figure 9. Zero Cross Delay Time (BM1Z002FJ) Figure 10. Zero Cross Delay Time (BM1Z003FJ)
Table 1. Zero Cross Delay Time by Adjusting R
DSET
7/18
Loading...
+ 14 hidden pages
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use