SLAA476B February 2011 – July 2019 BQ2040 , BQ2040 , BQ2060A , BQ2060A , BQ2063 , BQ2063 , BQ2083-V1P3 , BQ2083-V1P3 , BQ2084-V143 , BQ2084-V143 , BQ2084-V150 , BQ2084-V150 , BQ2085-V1P3 , BQ2085-V1P3 , BQ20Z40-R1 , BQ20Z40-R1 , BQ20Z70-V160 , BQ20Z70-V160 , BQ20Z80A-V110 , BQ20Z80A-V110 , BQ28400 , BQ28400 , BQ78PL114 , BQ78PL114 , BQ78PL116 , BQ78PL116 , LM5145 , LM5145 , MSP430F5500 , MSP430F5500 , MSP430F5501 , MSP430F5501 , MSP430F5502 , MSP430F5502 , MSP430F5503 , MSP430F5503 , MSP430F5504 , MSP430F5504 , MSP430F5505 , MSP430F5505 , MSP430F5506 , MSP430F5506 , MSP430F5507 , MSP430F5507 , MSP430F5508 , MSP430F5508 , MSP430F5509 , MSP430F5509 , MSP430F5510 , MSP430F5510 , TPS40057 , TPS40057 , TPS40170 , TPS40170
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Wide-Vin Battery Charger Using SMBus Communication Interface Between MSP430™ MCUs and bq Fuel Gauges
- Trademarks
- 1 Introduction
- 2 Hardware
- 3
Software
- 3.1 SMBus Protocol Description
- 3.2 Software File Structure
- 3.3
API Calls Description
- 3.3.1 UCS_Init ( )
- 3.3.2 Timer_Init ( )
- 3.3.3 PWM_Init ( )
- 3.3.4 ADC_Init ( )
- 3.3.5 Fan_Init ( )
- 3.3.6 LED_Init ( )
- 3.3.7 SMBus_Initialize ( )
- 3.3.8 LED_Control ( )
- 3.3.9 Fan_Control ( )
- 3.3.10 VI_ADC_Read ( )
- 3.3.11 SMBus_Select ( )
- 3.3.12 Calibrate_Battery ( )
- 3.3.13 Delay_Timer ( )
- 3.3.14 PWM_Control ( )
- 3.3.15 Smbus_Access ( )
- 3.3.16 Smbus_Access_PEC ( )
- 3.3.17 crc8MakeBitwise ( )
- 3.4 Sample Application Description
- 4 SBS Supported Commands Using SMBus Protocol
- 5 Detailed Sample Application Flow Chart
- 6 Battery Status Register Description
- 7 MSP430F5510 Daughterboard Schematics
- 8 Setting Up the MSP430F5510 Daughterboard Hardware
- 9 Battery Calibration Circuit Setup
- 10 Battery Voltage and PWM Conversions
- 11 Battery Current and PWM Conversions
- 12 Power Stage Board Schematics (Generation 1: 40-V Input)
- 13 Bode Plot Measurement for Feedback Loop Stability Analysis
- 14 Power Stage Board Schematics (Generation 2: 60-V Input)
- 15 Setting Up the Power Stage Board Hardware
- 16 References
- Revision History
2.1 Overall System Description
Figure 2 shows the wide-Vin battery charger system block diagram.
Figure 2. System Block Diagram This particular system can monitor and charge two smart batteries at the same time. The system primarily comprises two subsystems (boards):
- MSP430F5510 daughterboard subsystem
- Power-stage board with the DC/DC converter subsystem
The MSP430F5510 board contains all of the digital logic and components of the system, while the power-stage board has all of the analog and power components. The MSP430F5510 board docks to the power-stage board through a 10-pin header. The following sections describe each of the subsystems.