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PS331 Datasheet Preview

PS331 Datasheet

Programmable SMBus/I2C Smart Battery ic With Packet Error Checking

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Preliminary
PS331
Multichemistry Smart Battery Monitor
Features
Pin Description
Performs all major Li Ion, NiMH battery
monitoring and reporting functions
providing up to 1% accuracy in capacity
SWITCH
EE-SCK
1
2
28 VDSS
27 SMB-CLK
measurement
Additional output pin for over voltage or
over temperature safety fuse operation
(SAFEOUT)
EE-Cf S
VREFT
VNTC
VCELL1
VASS1
3 26
4 PS331 25
5 24
6 23
7 22
SMB-DTA
LED 1
LED 2
LED 3
LED 4
Fully compliant with industry standard
Smart Battery Data Specification V1.1a
- SMBus V1.1 with PEC/CRC-8
communication with system host
VCELL2
VCELL3
VCELL4
VADD
VSHP
8
9
10
11
12
21 SAFEOUT
20 VDDD
19 EE-SI
18 EE-SI/SO
17 OSCIN
High accuracy measurement of charge /
discharge current, voltage, and
temperature with on-chip 14-bit integrating
A/D
VSHM
VASS2
13 16
14 15
0.209 mil SSOP
28-PIN Package
OSCOUT
VREG
Precise capacity reporting for all lithium
and nickel chemistries using PowerSmart
Pin Summary
patented algorithms and 3D battery cell
Pin Name
models
INPUT
3D models and “learned” parameters
EE-SCK, EE-CS,
spStruooprgeprdoarmitnsmecaxebtlellercnovanilafEigSEuMPraBRtiuOosnMsin;otfeufrl1flay-4cfeieceldllDsreai-ntaSheet4EVVVUENRC.-cTEESoCFLIm/LTS1O-4
series
VASS1, VADD,
Extremely low power operation:
VASS2
Function
LED Switch Input
SPI Serial EEPROM
Interface
Reference Voltage Output
Temperature A/D Input
Single Cell Voltage Inputs
Analog Supply Voltage
Inputs
- Sleep Mode: < 10 uA typical
VSHP, VSHM
Current Sense Resistor
- Run Mode: < 500 uA typical
Inputs
- Sample Mode: < 250 uA typical
PS31XX Modules available for quick
prototyping or production
Complete hardware and software
development tools available
VREG
OSCOUT, OSCIN
VDDD, VDSS
SAFEOUT
LED1-4
Voltage Reg. Control Output
Xtal Oscillator Inputs (32
KHz)
Digital Power Supply Inputs
Safety Control Output
LED Output Driver pins
SMB-CLK, SMB-DTA SMBus Interface Pins
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 over-
temperature 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
DataSheet4 U .com
1 www.powersmart.com
DataSheet4U.com
DataShee




Power Smart

PS331 Datasheet Preview

PS331 Datasheet

Programmable SMBus/I2C Smart Battery ic With Packet Error Checking

No Preview Available !

www.DataSheet4U.com
PowerSmart PS331 Data Sheet
Table of Contents:
1. General Description ................................. 2
2. Module Versions ...................................... 2
3. Development Tool Summary ................... 2
4. Reference Documents ............................. 4
5. LED Pins .................................................. 5
6. SAFEOUT Pin.......................................... 5
7. Discharge Capacity and Relearn ............. 7
8. Electrical Characteristics ......................... 8
PRELIMINARY
8.1. Absolute Maximum Ratings ...............8
8.2. DC Characteristics .............................8
8.3. AC Characteristics .............................9
8.4. Characteristics – SMBus....................9
8.5. Granularity .........................................9
9. Mechanical Packaging Information ........10
10. Quality Control........................................10
11. Notice .....................................................10
et4U.com
1. General Description
The PS331 contains battery measurement,
‘T-pin’ or thermistor (‘Safety Signal’) connection
control, and communications features all in a fully present on some battery packs. (The SAFEOUT
integrated system. Functionally the IC can form
pin may be used for other functions as well. It is
the basis of a complete ‘smart battery’ system for
activated either on over-voltage or over-
integration in a battery pack or embedded (non-
temperature and is polarity programmable.)
removable) battery system. (‘Smart battery’ can
include the standard data reporting as detailed by 2. Module Versions
the ‘Smart Battery System Specifications (SBS)’
The PowerSmart PS31XX series modules offer
via the SMBus protocols, or it can be alternate
complete, board-level battery monitoring and
data content using the standard, on-board SMBus control modules that incorporate the advanced
communications port.)
PS331 Smart Battery IC. The PS31XX
subsystems include the EEPROM memory for
The PowerSmart PS331 continuously monitors
parameter storage as well as all of the necessary
charge and discharge currents, battery pack and
support electronics so that they can be simply
cell voltages, and pack temperature. The ICDataSheet4inUte.cgormated in a battery pack. As a result, they are
continuously monitors, records, and reports
an ideal vehicle to support both prototyping and
numerous data values including the present state- production requirements. These module designs
of-charge (SOC) of the battery cells in
are available with safety electronics for Li
percentages, Ampere-Hours, or Watt-Hours.
chemistries and can be configured for multiple
Additional data predicting both present and future
pack configurations. Please refer to the
operating run-time, charge time, and operating
PowerSmart web site for ordering information and
capacity is also available. The PS331 also
design documentation (including schematics) for
communicates various alarms when the predicted PowerSmart module products
capacity is below a user-set limit (time and/or
(www.powersmart.com).
capacity) and when the battery cells are
completely empty. This allows a smart battery-
3. Development Tool Summary
enabled system to use the battery energy ‘down to PowerSmart provides all the necessary hardware
the last drop’ without need for extensive ‘buffers’
and software to enable easy tailoring of battery
to permit final suspend or save-to-disk operation.
control algorithm parameters and cell performance
models to meet specific application requirements
The PS331 communicates how and when to
and attain the highest accuracy available
charge the smart battery based on preset
anywhere. Table 1 summarizes the development
algorithms, present battery conditions and
tool offering from PowerSmart to support the
externally provided charge inputs (voltage and
PS331. Please refer to the PowerSmart web site
current.) When charging parameters exceed
for ordering information at www.powersmart.com.
desired limits, a stop charging instruction is sent to
all external smart battery charging circuits. When
correct charging is complete, a stop charge signal
is also sent to the external smart battery charger
indicating completion. A secondary signaling
mechanism using the SAFEOUT pin output is also
available to signal an over-charge condition via the
DataSheet4U.com
Updated 9/18/00
Copyright PowerSmart, Inc., 2000
2
www.powersmart.com
DataSheet4 U .com
DataSheet4U.com
DataShee


Part Number PS331
Description Programmable SMBus/I2C Smart Battery ic With Packet Error Checking
Maker Power Smart
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PS331 Datasheet PDF






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