PS402-01XX Datasheet | Microchip Technology

Features - Single chip solution for rechargeable battery management - Embedded Microchip patented Accuron™ technology provides precise capacity reporting (within 1%) for all rechargeable battery chemistries - User configurable and "learned" parameters stored in on-chip 128 x 8 EEPROM; fully field re-programmable via SMBus interface - Integrating sigma-delta A/D converter accurately measures: - Current through sense resistor (15-bits) - High voltage (18V) battery cells directly connected to pack voltage input (11-bits) - Temperature measurement from on-chip sensor or optional external thermistor (11-bits) - Integrated precision silicon time base - Eight individually programmable input/output pins that can be assigned as - Charge control I/O - Safety function I/O - SOC LED output drive pins - General purpose I/O - Full SMBus v1.1 2-wire host interface - Microchip firmware in 12 Kbytes of customizable on-chip OTP EPROM Pin Description VDDD GPIO(4) GPIO(5) GPIO(6) GPIO(7) SMB-CLK SMB-DTA RSV5 RSV6 RSV7 VC(1) VDDA VSSA RSHP 1 2 3 4 5 28 27 26 25 24 VSSD GPIO(3) GPIO(2) GPIO(1) GPIO(0) RSV1 VPP RSV2 RSV3 RSV4 ROSC VREFT VNTC RSHN 7 8 9 10 11 12 13 14 PS402 23 22 21 20 19 18 17 16 15 28-pin SSOP Package (0.209 mil) Pin Summary Pin Name VDDD, VSSD GPIO(0..7) SMB-CLK, SMB-DTA VC(1) VDDA, VSSA Type Description Supply Digital supply voltage input, ground I/O I/O I Programmable digital I/O SMBus Interface Pack voltage input Supply Voltage regulator output (internally connected to analog supply input); ground I I O I I I Current sense resistor input External thermistor input Thermistor reference voltage Internal oscillator bias resistor Reserved pins OTP programming voltage RSHP, RSHN VNTC VREFT ROSC RSV1-7 VPP  2003 Microchip Technology Inc. DS21766A-page 1 1.0 PRODUCT OVERVIEW The PS402 is a fully integrated IC for battery management that bines a proprietary microcontroller core together with monitoring/control algorithms and 3D cell models stored in...