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The Texas Instruments bq27621-G1 is a minimally configured microcontroller peripheral that provides system-side fuel gauging for single-cell Li-Ion batteries. The device requires very little user configuration and system microcontroller firmware development.
The bq27621-G1 uses the Dynamic Voltage Correlation algorithm for fuel gauging. This process eliminates the need for a sense resistor when calculating remaining battery capacity (mAh), state-of-charge (%), battery voltage (mV), and temperature (°C).
Battery fuel gauging with the bq27621-G1 requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The tiny 9-pin, 1.62 mm × 1.58 mm, 0.5 mm pitch YZF package is ideal for space-constrained applications.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
BQ27621-G1 | YZF (9) | 1.62 mm × 1.58 mm |
Changes from D Revision (December 2014) to E Revision
Changes from C Revision (March 2014) to D Revision
Changes from B Revision (January 2014) to C Revision
PART NUMBER | BATTERY TYPE |
CHEM_ID (1) |
FIRMWARE VERSION (2) |
PACKAGE (3) |
COMMUNICATION FORMAT |
---|---|---|---|---|---|
bq27621YZFR-G1 | LiCoO2
(4.2 V maximum charge) |
0x1202 | 1.05 (0x0105) |
CSP-9 | I2C |
LiCoO2
(4.3 V maximum charge) |
0x1210 | ||||
LiCoO2
(4.35 V maximum charge) |
0x354 |