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Teilenummer | M61048FP |
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Beschreibung | Battery Protection Analog Front End (AFE) IC | |
Hersteller | Renesas Technology | |
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Gesamt 24 Seiten www.DataSheet4U.com
M61048FP
Battery Protection Analog Front End (AFE) IC
REJ03F0129-0100
Rev.1.00
Mar 04, 2005
Description
The M61048FP is intended to be used as SB: Smart Battery. All functions needed for SB are packed to this M61048FP.
The combination use with microcomputer such as M37512 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
M61048FP. 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.1.00 Mar 04, 2005 page 1 of 23
M61048FP
CFET
VCC
VIN1
VIN2
VIN3
VIN4
GND
PCFET
DFET
VIN12
VREG
RESET
DI
CK
CS
ANALOG
Measurement circuit 3
V
Data input
0.5V↔VREG–0.5V
CFET
VCC
PCFET
DFET
VIN12
VIN1
V1
VIN2
V2
VIN3
V3
VIN4
V4
GND
VREG
DI
CK
CS
ANALOG
0.47µF
Data input
0.5V↔VREG–0.5V
V
Measurement circuit 4
Rev.1.00 Mar 04, 2005 page 6 of 23
6 Page M61048FP
Analog Output Selector
Analog output selector block is shown in Figure 4. The command from microcomputer determines whether GND is
outputted to an analog terminal, or the voltage chosen in the battery voltage detection circuit is outputted.
At the time of GND output, since the battery voltage detection circuit stops, M61048FP goes into power save mode.
ANALOG
From Serial to Parallel
conversion circuit
Analog output
selector
Battery voltage
detection circuit
–
+
VREF
Figure 4 Analog Output Selector
Rev.1.00 Mar 04, 2005 page 12 of 23
12 Page | ||
Seiten | Gesamt 24 Seiten | |
PDF Download | [ M61048FP Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
M61048FP | Battery Protection Analog Front End (AFE) IC | Renesas Technology |
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