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O2Micro - High-High Accuracy Battery (Gas) Gauge

Numéro de référence OZ9313
Description High-High Accuracy Battery (Gas) Gauge
Fabricant O2Micro 
Logo O2Micro 





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OZ9313 fiche technique
OZ9313
High-High Accuracy Battery (Gas) Gauge for High
Power Batteries
FEATURES
Integrated 8-bit microcontroller with high
performance and low power consumption
Integrated, highly accurate ADC works with a
variety of BMU ICs, including::
o OZ890 +OZ9313: 5~13 Cells
o OZ8920+OZ9313: 5~ 8 Cells
o OZ8930+OZ9313: 3~ 6 Cells
o OZ8940+OZ9313: 6~12 Cells
o Supported Stacked Protection ICs + OZ9313
Smart Battery Specification (SBS) v 1.1
compatible
Compliant with JEITA safety guidelines
Measures charge/discharge current with a
dedicated 16-bit ADC:
o 0.27 nVhr resolution
o Automatic On-line Calibration to improve
accuracy
Monitors individual cell voltages, terminal voltage
and external temperature from BMU (Battery
Management Unit) chips
Integrated internal temperature sensor
Programmed to scan BMU protections that
include:
o Over voltage Protection
o Under voltage Protection
o Over current Protection
o Short circuit Protection
o Over temperature Protection
o Under temperature Protection
Embedded 64 k bytes flash and 1 k bytes SRAM
to support variety of battery characteristics in
high power application
Integrated 8-bit PWM with 2 bit pre-scaler and
multi-GPIOs (GPIO0~GPIO9) and 2 GPO
(GPIO10, GPIO11)
Integrated 1.8V voltage regulator (LDO18)
Power Modes: Full and Sleep
Low sleep mode current: less than 10 µA (typ.)
TSSOP30 Package with 0.50 mm pitch
APPLICATIONS
Electric Bicycles
Electric Motorcycles
Power Tools
Backup Battery Packs
GENERAL DESCRIPTION
OZ9313 is a highly accurate battery (gas) gauge
designed to work with high power Battery
Management Units (BMUs), specifically O2Micro’s
industry leading OZ890, OZ8920, OZ8930 and
OZ8940.
OZ9313 directly measures charge current and
discharge current with an integrated high-accuracy
and low-power sigma-delta ADC. Furthermore,
OZ9313 is programmed to constantly scan individual
cell voltages, the terminal voltage of the battery pack
and external temperature in order to continually
update SOC (State of Charge) and SOH (State of
Health) of a high power battery pack.
With O2Micro’s innovative Battery Gauge Software
(BGS) firmware, OZ9313 automatically self-calibrates
without waiting to complete a charge/discharge cycle.
Moreover, this automatic calibration successfully
increases the reliability and accuracy of a variety of
high power battery packs.
For safety reasons, BMUs invoke their own hardware
based protection mechanisms and prohibit OZ9313
from triggering protection except what is specifically
related to the gas gauge function. This is illustrated in
the table shown below:
BMU
chip
OZ890
OZ8920
OZ8930
OZ8940
Trigger
protection
OZ890
OZ8920
OZ8930
OZ8940
Release
protection
OZ9313
OZ8920
OZ8930
OZ8940
Gas Gauge
Trigger/Release
protection
OZ9313
OZ9313
OZ9313
OZ9313
OZ9313 monitors cell voltage and sends cell
balancing commands to the BMU. Cell balancing
increases the overall life of a battery pack.
OZ9313 is compliant with SBS Data Specification
v1.1 (See section on SBS v1.1 Functions for detailed
information) and can be easily modified to support
additional, optional manufacturer functions, protocol
extensions, and gauge functionality.
ORDERING INFORMATION
Part Number Temp Range
OZ9313RN -40oC to 85oC
Package
TSSOP30
04/27/2012
OZ9313_DS_v1.1
Copyright© 2005-2012 by O2Micro
All Rights Reserved
U.S. Patent #6,744,394; 7,161,520; 7,196,652; 7,095,211 and others pending
Page 1
CONFIDENTIAL

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