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Power Smart

PS334 Datasheet Preview

PS334 Datasheet

Programmable Smbus Smart Battery ic

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Preliminary
PS334
Li Ion Smart Battery Manager
Features
Pin Description
Performs all major Li Ion battery
management functions including
INPUT
1
28 VDSS
- Accurate capacity monitoring
- Direct control of external charge
circuitry (e.g. PWM)
- Direct control of secondary safety
EE-SCK
EE-CS
VREFT
VNTC
VCELL1
2 27
3 26
4 PS334 25
5 24
6 23
SMB-CLK
SMB-DTA
OUTPUT1
OUTPUT2
OUTPUT3
functions
VASS1
7
22 OUTPUT4
Six independently programmable output
pins can be assigned as SOC LED outputs,
direct charge control, or additional levels
VCELL2
VCELL3
VCELL4
VADD
8
9
10
11
21 OUTPUT5
20 VDDD
19 OUTPUT6
18 EE-SI/SO
of safety control
Fully compliant with industry standard
Smart Battery Data Specification V1.1a
- SMBus V1.1 with PEC / CRC-8
communication with system host
VSHP
VSHM
VASS2
12 17 OSCIN
13 16 OSCOUT
14 15 VREG
0.209 mil SSOP
28-PIN Package
High accuracy measurement of charge /
discharge current, voltage, and
Pin Summary
temperature with on-chip 14-bit integrating
A/D
Precise capacity reporting for all lithium-
Pin Name
Input
EE-SCK, EE-CS,
EE-SI/SO
based chemistries using PowerSmart
VREFT
patented algorithms and 3D battery ceDll ataSheet4U.com
models
VNTC
Function
LED Switch Input
SPI Serial EEPROM
Interface
Reference Voltage
Output
Temperature A/D Input
3D models and “learned” parameters
VCELL1-4
Single Cell Voltage
stored in external EEPROM; fully field re-
Inputs
programmable via SMBus interface
Supports cell configurations of 1-4 cells in
series
Extremely low power operation:
- Sleep Mode: < 10 uA typical
- Run Mode: < 500 uA typical
- Sample Mode: < 250 uA typical
PS345X modules available for quick
VASS1, VADD,
VASS2
VSHP, VSHM
VREG
OSCOUT, OSCIN
OUTPUT1-6
Analog Supply Voltage
Inputs
Current Sense Resistor
Inputs
Voltage Reg. Control
Output
Crystal Oscillator Inputs
(32 KHz)
Programmable Output
prototyping or production
Pins 1-6
Complete hardware and software
development tools available
VDDD, VDSS
SMB-CLK, SMB-DTA
Digital Power Supply
Inputs
SMBus Interface Pins
Product Overview
The PS334 is an advanced Smart Battery IC
product from PowerSmart, incorporating the
accurate capacity monitoring from the PS330
and PS331 plus six (6) programmable output
pins. The PS334’s programmable outputs can
be used as LED outputs to display State-Of-
Charge (SOC), direct control of external charge
circuitry, or to provide additional levels of safety
in LiIon packs.
DataSheet4U.com
Updated 9/20/00
Copyright PowerSmart, Inc., 2000
DataSheet4 U .com
As a result, PowerSmart’s PS334 eliminates the
need for additional components normally
required for charge control or safety. Using the
PS334, OEMs can achieve the highest smart
battery data accuracy in a complete battery
management solution at an attractive cost. The
PS334 delivers both space and total system
component cost savings which is especially
useful for applications such as PDAs, digital
cameras, and notebook computers
1 www.powersmart.com
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DataShee




Power Smart

PS334 Datasheet Preview

PS334 Datasheet

Programmable Smbus Smart Battery ic

No Preview Available !

www.DataSheet4U.com
PowerSmart PS334 Data Sheet
PRELIMINARY
Table of Contents
1. General Description ................................. 2
2. Module Versions ...................................... 2
3. Development Tool Summary ................... 2
4. Reference Documents ............................. 3
5. PS334 Programmable Features .............. 4
6. Output Pin Configuration ......................... 4
6.1. Output Pin Initialization ..................... 4
6.2. Safety Control Configuration ............. 4
6.3. Charge Control Configuration ........... 4
6.4. LED Control Pin Configuration .......... 5
7. RM Correction and FCC Relearn ............ 5
7.1. Near EOD Correction / Relearn ........ 5
7.2. Open Circuit RM Correction .............. 7
7.3. Near EOC RM Correction ................. 9
8. Lithium Ion Taper Currents during EOC...9
9. Pre-Charge Limit Conditions ....................9
10. Electrical Characteristics ........................10
10.1. Absolute Maximum Ratings .............10
10.2. DC Characteristics ...........................10
10.3. AC Characteristics ...........................10
11. AC Characteristics – SMBus ..................11
11.1. Granularity .......................................11
12. Mechanical Packaging Information ........11
13. Quality Control........................................12
14. Errata and Revisions ..............................12
14.1. PS334 - Version 4.1 Firmware.........12
14.2. PS334 Data Sheet Revision History 12
15. Notice .....................................................12
et4U.com
1. General Description
The PS334 is part of PowerSmart’s P3 family of
On-chip circuitry includes an internal RC
ICs whose integrating, self-calibrating 14-bit A/D
oscillator and watchdog timer that are
ensures precise measurements of current,
complemented by a low-cost, low-power
voltage and temperature to enable remaining
external 32 kHz crystal for precise timing. A
runtime. The P3 family’s patented, self-learning
single external FET voltage regulator circuit is
3-dimensional cell models compensate for self-
also included for operation from battery voltages
discharge, temperature, charge/discharge
greater than 3.3 Volts.
efficiencies and other factors, and an auto-zero
offset correction feature automatically
2. Module Versions
compensates for accuracy drift during usage. In
Based on the PS334, PowerSmart's PS345X
addition, an advanced integrated 8-bit RISCDataSheet4US.ceormies Modules provide complete, ‘turn-key’
microprocessor enables exceptionally fast data
subsystems that can be simply integrated in a
computations.
battery pack or embedded application. As a
result, the PS345X Module family supports rapid
Additional enhancements to the PS334 include
prototyping and production of complete battery
more Lithium Ion cell model parameters (now
management solutions for all portable computer,
over 250) and control algorithm values.
communication, medical, industrial, or
Additional capacity correction and error reducing
automotive applications.
functions have been added to enhance reliability
and improve fuel-gauge and charge control
Each PS345X module incorporates the PS334
performance.
IC, together with reprogrammable EEPROM and
complete safety circuitry, and programmable
New capacity correction features have been
output pins. The PS3452, PS3453, and PS3454
added to PowerSmart’s patented control
battery management boards. Respectively, they
algorithms. These include new temperature
support Lithium Ion configurations of 2, 3, and 4-
based End-of-Charge trigger conditions as well
cell applications.
as capacity correcting conditions using low-
discharge (with load), open-circuit, and near
Please refer to the PowerSmart web site for
End-Of-Charge based voltage trip points.
ordering information (www.powersmart.com).
The PS334 can be easily customized for a
particular application’s Lithium Ion-based battery
cell chemistries using the external EEPROM.
Upgrades to previously assembled battery packs
are simple via the standard SMBus serial
communications interface. The EEPROM also
contains the programming information for the
configuration of the programmable output pins.
3. Development Tool Summary
PowerSmart provides all the necessary
hardware and software to enable easy tailoring
of battery control algorithm parameters and cell
performance models to meet specific application
requirements and attain the highest accuracy
available anywhere. Table 1 summarizes the
development tool offering from PowerSmart to
DataSheet4U.com
Updated 9/20/00
Copyright PowerSmart, Inc., 2000
2
www.powersmart.com
DataSheet4 U .com
DataSheet4U.com
DataShee


Part Number PS334
Description Programmable Smbus Smart Battery ic
Maker Power Smart
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PS334 Datasheet PDF






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