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PS700 Datasheet(PDF) 2 Page - Microchip Technology |
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PS700 Datasheet(HTML) 2 Page - Microchip Technology |
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2 / 38 page  PS700 DS21760F-page 2 2004 Microchip Technology Inc. 1.0 PRODUCT OVERVIEW The PS700 is a cost-effective, highly accurate IC that measures, stores and reports all of the critical parameters required for rechargeable battery monitor- ing with a minimum of external components. It precisely measures charge/discharge current as well as voltage and temperature of a battery pack. In addition, the PS700 accurately accumulates both charge and discharge current as independent parameters. Temperature history can also be maintained for calculating self-discharge effects. The PS700 integrates a highly accurate 16-bit integrat- ing A/D converter that performs current measurement to within ±0.5% error. On-chip counters precisely track battery charge/discharge and temperature history. Also included are an on-chip voltage regulation circuit, non- crystal time base and on-chip temperature sensor. The operating voltage range of the PS700 is optimized to allow a direct interface to 1 or 2-series Li Ion/Li Poly battery packs. 512 bytes of general purpose nonvolatile EEPROM storage are provided to store factory programmed, measured and user defined parameters. Efficient communication is provided through an industry standard SMBus/I2C™ compatible 2-wire communications interface. This interface allows the host to determine accurate battery status for effective system power management and for communication to the end user. A battery management solution utilizing the PS700 delivers both space and total system component cost savings for a wide variety of battery operated applications. FIGURE 1-1: PS700 INTERNAL BLOCK DIAGRAM 512 EEPROM 512 EEPROM 32-bit Accumulators / Timers 32-bit Accumulators/ Timers Voltage Reference and Temp Sensor Voltage Reference and Temp Sensor Voltage Regulator Voltage Regulator Comm Interface Comm Interface Registers Registers 16-Bit Sigma-Delta Integrating A/D Converter 16-Bit Sigma-Delta Integrating A/D Converter Analog Input Mux Analog Input Mux Run Oscillator Run Oscillator VC1 ROSC GND Digital Section Analog Section Control and Status Control and Status SCL SR SDA Sleep Oscillator Sleep Oscillator VC2/IO1 NTC/IO0 |
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