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PDF M61044FP Data sheet ( Hoja de datos )
| Número de pieza | M61044FP | |
| Descripción | 3-Battery Version | |
| Fabricantes | Renesas Technology | |
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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
1 page  
M61044FP
Transition to Power-Down Mode
When the microprocessor determines that the battery voltage has dropped it sends a power-down instruction via the
interface circuit. When it receives the instruction, the M61044FP’s DFOUT pin switches to high voltage. In addition,
the VIN_12 pin is pulled down to low level by an internal resistor. When the VIN_12 pin goes to low potential after
reception of the power-down instruction, output from the series regulator stops, switching the M61044FP into power-
down mode.
At this point the operation of the circuitry is completely halted. In this status CFOUT is high level and DFOUT is high
level (external charge/discharge prohibited status). The maximum current consumption of the M61044FP is 1.0 µA in
order to prevent any further drop in the battery voltage.
VIN_12
DFOUT
VCC
CFOUT
Ground level after
excess discharge
Vreg
RESET
CK
DI
CS
Series
regulator
Regulator
On/off control
Internal reset
circuit
Serial/parallel
converter circuit
Control signals from
interface circuit
VIN_1
Figure 4 Operation After Excess Discharge Detection
Cancellation of Power-Down Mode
If the battery pack is connected to a charger when the M61044FP is in the power-down mode (VIN_12 becomes high
level), the series regulator immediately begins to operate. The power-down mode is canceled, and once again the
M61044FP is ready to receive instructions from the microprocessor.
Absolute Maximum Ratings
Table 2
Item
Absolute maximum rating
Power supply voltage
Allowable loss
Ambient operating temperature
Storage temperature
Symbol
Vabs
Vcc
PD
Topr
Tstg
Rated Value
33
30
500
-20 to +85
-40 to +125
Unit Conditions
V
V
mW
°C
°C
Rev.1.0, Sep.19.2003, page 5 of 34
5 Page 
M61044FP
CFOUT
VCC
VIN_1
VBAT1
VIN_2
VBAT2
VIN_3
VBAT3
RESET
GND
VIN_11
DFOUT
VIN_12
VREG
DI
CK
CS
CIN
ANALOG
_O U T
CREG
4.7µF
Data input
VREG ↔VSS
CIN
0.01µF
V
Circuit 5
CFOUT
VCC
VIN_1
VBAT1
VIN_2
VBAT2
VIN_3
VBAT3
RESET
GND
VIN_11
DFOUT
VIN_12
VREG
DI
CK
CS
CIN
ANALOG
_O U T
CREG
4.7µF
Data input
VREG ↔VSS
CIN
0.01µF
A
Circuit 6
Rev.1.0, Sep.19.2003, page 11 of 34
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet M61044FP.PDF ] | |
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