Document
For Electric Cars & Hybrid Cars
Isolation Voltage 2,500Vrms High Voltage Detection IC
BM67290FV-C
General Description
This is a voltage detector IC for DC-DC converter. Aside from being capable of converting input voltage to duty, it has built in protection functions against low voltage, overvoltage and active overvoltage.
Features
Built-in input PWM modulation circuit Built-in low voltage lock out circuit Built-in input under voltage protection function Built-in input overvoltage protection function Built-in magnetic isolator Built-in active overvoltage protection function Built-in reference voltage output
Key Specifications
Isolation Voltage:
2,500Vrms (Max)
Power Source Voltage Range (high voltage side):
8.0V to 24V
Power Source Voltage Range (low voltage side):
3.0V to 5.5V
Reference Voltage :
5V±1.5%
Oscillation Frequency Variability:
10kHz to 250kHz (Typ)
Package
W(Typ) x D(Typ) x H(Max)
Application
DC-DC converter
Typical Application Circuit
SSOP-B20W 6.50mm x 8.10mm x 2.01mm
VBIAS
VDD1 VDD2 REF NC VH OUT RFOV NC RFLV SD1 VDTY SD2 VACT NC RT NC GND1 GND2 GND1 GND2
VBIAS
Controller
Figure 1. Example of a Typical Application Circuit of DC-DC Converter
○Product structure: Silicon integrated circuit ○This product has no designed protection against radioactive rays
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© 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・14・001
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TSZ02201-0727ABZ00010-1-2 10.Nov.2014 Rev.001
BM67290FV-C
Pin Configuration
REF GND1 RFOV RFLV
VH VDTY VDD1
VACT GND1
RT
GND2 NC VDD2 NC OUT SD1 NC SD2 NC GND2
Figure 2. BM67290FV-C Package (SSOP-B20W)
Pin Descriptions
Terminal Number
Code
1 REF
2 GND1
3 RFOV
4 RFLV
5 VH
6 VDTY
7 VDD1
8 VACT
9 GND1
10 RT
11 GND2
12 NC
13 SD2
14 NC
15 SD1
16 OUT
17 NC
18 VDD2
19 NC
20 GND2
I/O Function
O Reference voltage terminal - Grounding terminal 1 (high voltage side)
I Input overvoltage protection value setting terminal I Input low voltage protection value setting terminal
I Input voltage signal terminal
I Input voltage signal terminal for Duty - Power source terminal 1 (high voltage side)
I Active voltage signal terminal - Grounding terminal 1 (high voltage side)
I Timing resistance terminal - Grounding terminal 2 (low voltage side)
- Disconnected terminal O Protective cutoff terminal 2 - Disconnected terminal
O Protective cutoff terminal 1
O
Input voltage monitoring condition output signal terminal
- Disconnected terminal
- Power source terminal 2 (low voltage side)
- Disconnected terminal
- Grounding terminal 2 (low voltage side)
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© 2014 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001
2/30
TSZ02201-0727ABZ00010-1-2 10.Nov.2014 Rev.001
BM67290FV-C
Block Diagram
VDD1
REF
VACT
VH RFOV RFLV VDTY
RT GND1
Internal circuit VDD UVLO COMP
VDD 7.7V/7.4V
REF
REG12V REGlogic
Internal circuit
(UVLO)
4.2V/4.0V
REF/ 4.0V
VACT COMP
REF UVLO COMP
(PRT1)
Transformer 1
(PWM) Transformer
driving circuit
VHOV COMP.