⚫ Maximum support 17 battery cells in series
⚫ 3mV measurement accuracy with 14 bits voltage ADC for cell
voltage, and 6 channels analog input measurement for
Thermistor
⚫ Built-in 16 bits Current measurement ADC (Coulomb Counter)
⚫ Low–side Sense resistor Current measurement and monitoring
⚫ Operation mode - Active, Standby/Low power; Sleep and
Shutdown
⚫ SPI serial communication interface up to 1MHz clock with CRC
code correction and watchdog timer
⚫ Built-in ALARM pins for overvoltage, undervoltage, overcurrent
and short circuit detection and protection feature
⚫ Support external cell balance MOSFET operation as well
⚫ 2 channels General GPIO Interrupt signal provision for MCU to
notify state of operation as well as measurement cycle indication
at the available GPIO pins
⚫N-MOSFET driver: Charge (CHG) & Discharge (DIS) with built-in
regulator and FETOFF control pin
⚫ Built in controllable Fuse driver for cells Over-voltage, Overcurrent and Over-temperature monitoring algorithm to serve as
secondary protection system
⚫ Regulator (REGEXT) for external circuit power provision with
selectable output setting 3.3V/Hi-z, and 50mA drive ability
⚫ Package : TQFP 48L (7x7x1mm3
, Lead Pitch 0.5mm)
System Block Diagram
Overview
KA49702A is a battery monitoring IC with protection function.
With high resolution ADC built-in, KA49702A is capable to
measure battery cell voltage and current level accurately.
Through SPI serial interface, microcontroller unit (MCU) is
able to read the status and measured result by KA49702A.
The ALARM pins alert the MCU with the abnormal condition
such as over voltage (OV), under voltage (UV),
over current (OC) and short circuit (SC).
Over temperature(OT), under temperature(UT)
KA49702A can support an application with up to 17 batteries
cells in series or a maximum voltage of 85V, it is suitable for
application with high input voltage such as E-bike, UPS etc.
Characteristics
• Pedelec, e-Bike, UPS, Server Backup System, Power Tool,
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