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Renesas Electronics Components Datasheet

M61044FP Datasheet

3-Battery Version

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M61044FP
3-Battery Version, Reset Pin
REJ03F0066-0100Z
Rev.1.0
Sep.19.2003
Description
The M61044FP is an semiconductor IC device developed for smart battery packs. It incorporates all the analog circuitry
required by smart batteries in a single chip. When used in conjunction with a microprocessor, it allows the
implementation of a variety of functions, such as battery capacity detection, through the addition of minimal peripheral
devices and is ideal for smart battery system (SBS) battery packs.
The M61044FP also has an on-chip overcurrent detect circuit so that the FET for controlling battery charging and
discharging is protected regardless of the processing speed of the microprocessor.
The microprocessor can change the amplifier gain of the charge/discharge current detect circuit, so battery capacity
detection accuracy is increased. In addition, the M61044FP incorporates a linear regulator that allows it to function as
the power supply for the microprocessor, thereby simplifying power supply block design.
Features
On-chip high-gain op-amp for monitoring charge and discharge current.
On-chip overcurrent detect circuit to protect FET.
Charge/discharge FET can be controlled from microprocessor.
Power-save function for reducing current consumption.
3.3 V operation to reduce microprocessor current consumption.
High-voltage device (absolute maximum rating: 33 V).
Application
Smart battery system (SBS) battery packs
This product is currently under development, and its specifications, pin assignments, etc., are subject to change.
Pin Connection Diagram (Top View)
VCC
RESET
VIN_1
VIN_2
VIN_3
VIN_12
DFOUT
CFOUT
1
2
3
4
5
6
7
8
16 VREG
15 DI
14 CK
13 CS
12 CIN
11 Analog_out
10 VIN_11
9 GND
Package: 16P-TSSOP
Rev.1.0, Sep.19.2003, page 1 of 34


Renesas Electronics Components Datasheet

M61044FP Datasheet

3-Battery Version

No Preview Available !

M61044FP
Block Diagram
VCC
VREG
RESET
CK
DI
CS
CFOUT DFOUT
CIN
VIN_12
Series
regulator
FET control
circuit
Regulator
On/off control
Power-down
circuit
Serial/parallel
converter
circuit
Charge/discharge current
detect circuit
Overcurrent
detect circuit
Delay
circuit
Battery
voltage
detect
circuit
VIN_1
VIN_2
Analog
_OUT
Output
selector
Gain switcher circuit
Shift
voltage
adjustor
Battery 1-3
analog output
VIN_3
VIN_11 GND
Rev.1.0, Sep.19.2003, page 2 of 34


Part Number M61044FP
Description 3-Battery Version
Maker Renesas Technology
Total Page 30 Pages
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