PS700 Datasheet, PDF (1/38 Pages) Microchip Technology – Battery Monitor

Battery Monitor
PS700
Features
• Measures, maintains and reports all critical
rechargeable battery parameters with high
accuracy
• Supports Lithium (1-cell and 2-cell) battery packs
• Current measurement with 16-bit integrating A/D
accurate to less than ±0.5% error
• Temperature measurement accurate to within
±2°C absolute, using on-chip temperature sensor
or external thermistor
• Accumulation of charge current, discharge
current, temperature and voltage in independent
32-bit registers
• 512-byte nonvolatile EEPROM stores factory
programmed, measured and user-defined
parameters
• In-system offset calibration compensates for
offset error in current measurement
• Industry standard SMBus/I²C™ compatible 2-wire
communications interface
• 8-pin TSSOP package
• -20°C to +85°C operating temperature range
• NTC pin can be configured as a thermistor input
or GPIO
• VC2 pin can be configured as a cell input or a
GPIO
• Flexible power operating modes allow low-power
monitoring of battery conditions during system full
operating and standby conditions:
- Run: Continuous Conversion; 80 µA typ.
- Sample: Sample interval from
0.5-64s @ 45 µA typ.
- Sample-Sleep: Sample interval from
0.5-138s min. @ 20 µA typ.
• Shelf-Sleep mode reduces power consumption
during pack storage conditions to 300 nA typ.,
with automatic wake-up upon pack insertion
Pin Description
VC2/IO1
VC1
SCL
SDA
1 _PS700 8
2
7
3
6
4
5
SR
GND
NTC/IO0
ROSC
8-pin 150 mil
TSSOP Package
Pin Summary
Pin Name
Description
VC2/IO1
VC1
SCL
SDA
ROSC
NTC/IO0
GND
SR
Cell voltage input for cell 2 in a
2-series Li Ion pack or general
purpose I/O #1
Cell voltage input for cell 1
SMBus clock line
SMBus data l/O
Oscillator bias resistor
External thermistor connection or
general purpose I/O #0
Power supply ground
Sense resistor input
 2004 Microchip Technology Inc.
DS21760F-page 1