The Texas Instruments bq27530-G1 system-side Li-Ion Battery Management Unit is a microcontroller peripheral that provides Impedance Track™ fuel gauging and charging control for single-cell Li-Ion battery packs. The device requires little system microcontroller firmware development. Together with bq2416x Single-Cell Switchmode Charger, the bq27530-G1 manages an embedded battery (non-removable) or a removable battery pack.
The bq27530-G1 uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime-to-empty (min), battery voltage (mV), temperature (°C), and state-of-health (%).
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
bq27530-G1 | DSBGA (15) | 2.61 mm × 1.96 mm |
Changes from B Revision (January 2016) to C Revision
Changes from A Revision (May 2015) to B Revision
Changes from * Revision (December 2012) to A Revision
PIN | TYPE(1) | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
SRP | A1 | IA | Analog input pin connected to the internal coulomb counter where SRP is nearest the PACK– connection. Connect to 5-mΩ to 20-mΩ sense resistor. |
SRN | B1 | IA | Analog input pin connected to the internal coulomb counter where SRN is nearest the Vss connection. Connect to 5-mΩ to 20-mΩ sense resistor. |
VSS | C1, C2 | P | Device ground |
VCC | D1 | P | Regulator output and bq27530-G1 power. Decouple with 1μF ceramic capacitor to Vss. |
REGIN | E1 | P | Regulator input. Decouple with 0.1-μF ceramic capacitor to Vss. |
SOC_INT | A2 | I/O | SOC state interrupts output. Open drain output. |
BSCL | B2 | O | Battery Charger clock output line for chipset communication. Push-pull output. Note: CE has an internal ESD protection diode connected to REGIN. Recommend maintaining VCE ≤ VREGIN under all conditions. |
CE | D2 | I | Chip Enable. Internal LDO is disconnected from REGIN when driven low. |
BAT | E2 | I | Cell-voltage measurement input. ADC input. Recommend 4.8V maximum for conversion accuracy. |
SCL | A3 | I | Slave I2C serial communications clock input line for communication with system (Master). Open-drain I/O. Use with 10kΩ pull-up resistor (typical). |
SDA | B3 | I/O | Slave I2C serial communications data line for communication with system (Master). Open-drain I/O. Use with 10kΩ pull-up resistor (typical). |
BSDA | C3 | I/O | Battery Charger data line for chipset communication. Push-pull output. |
TS | D3 | IA | Pack thermistor voltage sense (use 103AT-type thermistor). ADC input. |
BI/TOUT | E3 | I/O | Battery-insertion detection input. Power pin for pack thermistor network. Thermistor-multiplexer control pin. Use with pull-up resistor >1MΩ (1.8 MΩ typical). |