The ADBMS1804 is a multicell battery stack monitor that measures
up to four series connected battery cells with a total measurement
error of less than 2 mV. The cell measurement range of 0 V to
5 V makes the ADBMS1804 suitable for most battery chemistries.
The ADBMS1804 includes one battery stack current measurement
channel, which can support synchronous current and voltage measurement.
A programmable gain amplifier (PGA) features adjustment
of the various current levels based on the target current range in
the application.
The ADBMS1804 can be powered directly from the battery stack.
The ADBMS1804 includes passive balancing for each cell, with
individual pulse-width modulation (PWM) duty cycle control for each
cell. The ADBMS1804 has dedicated alert output pins to indicate
fault state, which makes the system more robust and quick to
response. The ADBMS1804 also includes six configurable, alerts
triggered gate control outputs.
Other features of the ADBMS1804 include on-chip 3.3 V and 5 V
regulator, nine general-purpose analog inputs for external negative
temperature coefficient (NTC) thermistor connection with a voltage
bias to support the ratio measurement, five stack voltage measurement
channels of up to 40 V with integrated voltage dividers,
and an option to measure battery system current consumption via
additional shunt resistor.
APPLICATIONS
- 12 V vehicle starter and back-up battery
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). Send your project details, company information and contact by e-mail to CBMS_Doc_Req@analog.com. Additional support is available from your Analog Devices local sales.
