Texas Instruments bq26500EVM, Руководство пользователя

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bq26500EVM-Based Circuit Module
2 bq26500EVM-Based Circuit Module
The bq26500EVM based circuit module is an example circuit for battery fuel gauging of a single cell Li-
Ion/Li-Polymer battery pack. There are two separate circuits on the EVM module. One is the active
bq26500 fuel gauging circuitry; the other is the logic and power control to program the on-chip
configuration EEPROM of the bq26500. In a typical application, only the active fuel gauging circuitry is
required. The EEPROM programming circuitry would be required in a test setup to configure the bq26500
for the application by programming the EEPROM.
Contacts on the circuit module provide direct connection to the cell (J1 − 1, J2 − 2), the serial
communications port (J1
−
3). The system load and charger connect across J1
−
1 and J2
−
1.
2.1 Test Points
Table 2 describes the EVM test points and lists their signal names.
Table 2. bq26500EVM Test Points
Test Point Signal Name description
J1 − 1 PACK+ Cell positive/pack positive
J1 − 2 GPIO GPIO pin of the bq26500
J1 − 3 HDQ Serial communications port
J2 − 1 PACK − Pack negative
J2 − 2 BAT − Cell negative
J3 − 1 21V High voltage for EEPROM programming
J3 − 2 PROG Input for timing of EEPROM programming
pulse
J3 − 3 VSS Programming ground
J4 1
−
2 jumper position for programming EEPROM
2 − 3 jumper position for normal bq26500 operation (fuel
gauging)
3 SLUU174A – March 2006 – Revised October 2013 bq26500EVM Single-Cell Battery Fuel Gauge Evaluation Module
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