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PS331 Dataheets PDF



Part Number PS331
Manufacturers Power Smart
Logo Power Smart
Description Programmable SMBus/I2C Smart Battery ic With Packet Error Checking
Datasheet PS331 DatasheetPS331 Datasheet (PDF)

www.DataSheet4U.com Preliminary PS331 Multichemistry Smart Battery Monitor Features Pin Description • Performs all major Li Ion, NiMH battery monitoring and reporting functions 28 VDSS 1 SWITCH 27 2 EE-SCK SMB-CLK providing up to 1% accuracy in capacity 26 3 EE-f CS SMB-DTA measurement VREFT LED 1 4 PS331 25 • Additional output pin for over voltage or 24 5 VNTC LED 2 over temperature safety fuse operation 23 6 VCELL1 LED 3 (SAFEOUT) 22 VASS1 LED 4 7 21 VCELL2 SAFEOUT 8 • Fully compliant with i.

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www.DataSheet4U.com Preliminary PS331 Multichemistry Smart Battery Monitor Features Pin Description • Performs all major Li Ion, NiMH battery monitoring and reporting functions 28 VDSS 1 SWITCH 27 2 EE-SCK SMB-CLK providing up to 1% accuracy in capacity 26 3 EE-f CS SMB-DTA measurement VREFT LED 1 4 PS331 25 • Additional output pin for over voltage or 24 5 VNTC LED 2 over temperature safety fuse operation 23 6 VCELL1 LED 3 (SAFEOUT) 22 VASS1 LED 4 7 21 VCELL2 SAFEOUT 8 • Fully compliant with industry standard 20 9 VCELL3 VDDD Smart Battery Data Specification V1.1a 19 VCELL4 EE-SI 10 - SMBus V1.1 with PEC/CRC-8 18 11 VADD EE-SI/SO communication with system host 17 12 VSHP OSCIN 16 VSHM OSCOUT 13 • High accuracy measurement of charge / 15 VASS2 VREG 14 discharge current, voltage, and 0.209 mil SSOP temperature with on-chip 14-bit integrating 28-PIN Package A/D • Precise capacity reporting for all lithium Pin Summary and nickel chemistries using PowerSmart Pin Name Function patented algorithms and 3D battery cell INPUT LED Switch Input models EE-SCK, EE-CS, SPI Serial EEPROM • 3D models and “learned” parameters EE-SI/SO Interface stored in external EEPROM; fully field reVREFT Reference Voltage Output programmable via SMBus interface VNTC Temperature A/D Input DataSheet4U.com • Supports cell configurations of 1-4 cells in VCELL1-4 Single Cell Voltage Inputs series VASS1, VADD, Analog Supply Voltage • Extremely low power operation: VASS2 Inputs - Sleep Mode: < 10 uA typical VSHP, VSHM Current Sense Resistor Inputs - Run Mode: < 500 uA typical VREG Voltage Reg. Control Output - Sample Mode: < 250 uA typical OSCOUT, OSCIN Xtal Oscillator Inputs (32 • PS31XX Modules available for quick KHz) prototyping or production VDDD, VDSS Digital Power Supply Inputs • Complete hardware and software SAFEOUT Safety Control Output development tools available LED1-4 SMB-CLK, SMB-DTA LED Output Driver pins SMBus Interface Pins DataShee Product Overview The PS331 is an advanced Smart Battery Monitor IC from PowerSmart, incorporating the latest Smart Battery System (SBS) Specification updates and revisions. Included is an advanced SMBus communications engine that is compliant with the SMBus V1.1 Packet Error Checking (PEC) CRC-8 error correction protocols. The PS331 implements updated firmware to process all the revised Smart Battery Data (SBData) V1.1 data values. The PS331 integrates an advanced RISC microprocessor, a precise 14-bit digital to analog converter, and an external serial EEPROM for storage of key operational parameters. An output pin is provided that can be set to activate on an over-voltage or overtemperature condition. This ‘SAFEOUT’ pin can be used to activate a fuse or other safety device for added safety in battery pack designs. The PS331 can be easily customized for applications of Nickel or Lithium based battery cell chemistries using the external EEPROM. Upgrades to previously assembled battery packs are simple via the standard SMBus serial communications interface. DataSheet4U.com Updated 9/18/00 Copyright PowerSmart, Inc., 2000 DataSheet 4 U .com 1 www.powersmart.com DataSheet4U.com www.DataSheet4U.com PowerSmart PS331 Data Sheet PRELIMINARY Table of Contents: 1. 2. 3. 4. 5. 6. 7. 8. General Description ................................. 2 Module Versions ...................................... 2 Development Tool Summary ................... 2 Reference Documents ............................. 4 LED Pins .................................................. 5 SAFEOUT Pin.......................................... 5 Discharge Capacity and Relearn ............. 7 Electrical Characteristics ......................... 8 8.1. 8.2. 8.3. 8.4. 8.5. 9. 10. 11. Absolute Maximum Ratings ...............8 DC Characteristics .............................8 AC Characteristics .............................9 Characteristics – SMBus....................9 Granularity .........................................9 Mechanical Packaging Information ........10 Quality Control........................................10 Notice .....................................................10 1. General Description The PS331 contains battery measurement, control, and communications features all in a fully integrated system. Functionally the IC can form the basis of a complete ‘smart battery’ system for integration in a battery pack or embedded (nonremovable) battery system. (‘Smart battery’ can include the standard data reporting as detailed by the ‘Smart Battery System Specifications (SBS)’ via the SMBus protocols, or it can be alternate data content using the standard, on-board SMBus communications port.) ‘T-pin’ or thermistor (‘Safety Signal’) connection present on some battery packs. (The SAFEOUT pin may be used for other functions as well. It is activated either on over-voltage or overtemperature and is polarity programmable.) et4U.com 2. Module Versions The PowerSmart PS31XX series modules offer complete, board-level battery monitoring a.


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