M61047FP Datasheet, PDF (1/24 Pages) Renesas Technology Corp – Battery Protection Analog Front End (AFE) IC

M61047FP
Battery Protection Analog Front End (AFE) IC
REJ03F0005-0200
Rev.2.00
Mar 04, 2005
Description
The M61047FP is intended to be used as SB: Smart Battery. All functions needed for SB are packed to this M61047FP.
The combination use with microcomputer such as M37517 will give various functions such as a detection of SB
Remaining Capacity. The reset circuit and the linear regulator for Vcc/Vref of microcomputer are dedicated in
M61047FP. So this will help easy design of power circuit design of SB.
Features
• All FETs are controlled by microcomputer
• Built-in low dropout series regulator for microcomputer
• Built-in battery voltage monitor circuit of each battery cell
• Built-in output selector, which outputs the voltage each selected battery cell
• Built-in discharge circuit of each battery cell
• Built-in voltage detection circuit of each battery cell
• Built-in FET OFF function controlled by microcomputer
• Various powers saving function to reduce total power dissipation
• 3-wire serial data transfer system for communication from microcomputer
• High Input Voltage Device (Absolute Maximum Rating: 33 V)
• CMOS monolithic IC
Application
• Smart Battery System
Block Diagram
VCC
VIN12
CFET PCFET DFET
VREG
DFETCNT
CFETCNT
RESET
CS
CK
DI
ANALOG
Series
regulator
Reset circuit
Serial to Parallel
conversion circuit
Multiplexer
circuit
FET control circuit
Battery cell
voltage
detection
circuit
Battery cell
1-4 voltage
analog output
VIN1
VIN2
VIN3
VIN4
GND
Rev.2.00 Mar 04, 2005 page 1 of 23