LITHIUM ION BATTERY CHARGER USING C8051F300 Relevant ...

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AN137 AMUX = Current AMUX = Volt No Monitor_Battery() Measurement Type ? Current Charge Voltage Temperature Battery Voltage Yes AV = 0 I = 0 I≤10? Start ADC0 ADC0 Done? Yes AV = AV + ADC0 Turn PWM on AV = AV/10 Figure 8. Monitor_Battery() Flow Chart. 10 Rev. 1.2 No Voltage w/ or w/out PWM Calculate Voltage w/ Calibration Coefficients Stop PWM AMUX = Temperature Current Calculate Current w/ Calibration Coefficients Return Desired Parameter END Stop PWM AMUX = Volt Temperature Calculate Temperature w/ Calibration Coefficients
Figure 9. Bulk_Charge() Flow Chart (Part 1). Set Appropriate Flags No No No No Bulk_Charge() Start PWM w/ Zero Output Yes Change Status from const_C to const_V Status = const_C T Within Limits ? V min_Bulk ? Calculate bulk_finish_time Green LED On Status = BULK & No Error? Yes Status = const_c ? Yes Regulate Battery Current Read Charge Voltage Charge Voltage Within Limits ? B C A D Yes Yes No AN137 Rev. 1.2 11
Page 1 and 2: AN137 LITHIUM ION BATTERY CHARGER U
Page 3 and 4: Conditioning Phase within the load
Page 5 and 6: toring. If a more accurate referenc
Page 7 and 8: Figure 5. 1 Cell Buck Converter Sch
Page 9: Figure 7. CalibrateADCforMeasuremen
Page 13 and 14: Status = Delay Green LED Off END Fi
Page 15 and 16: Figure 13. Measure() Flow Chart. me
Page 17 and 18: Figure 15. Regulate_Current() Flow
Page 19 and 20: -----------------------------------
Page 21 and 22: #define TEMP_SENSOR_GAIN 3300 // Te
Page 23 and 24: -----------------------------------
Page 25 and 26: Once ready, Get the 2nd calibration
Page 27 and 28: } FLKEY = 0xA5; FLKEY = 0xF1; // en
Page 29 and 30: } do{ if (PCA0CPH0 < 0xF0) PCA0CPH0
Page 31 and 32: CONST_C = 1; // Start in constant c
Page 33 and 34: unsigned int lowcurrent_finish_hour
Page 35 and 36: } PCA0CN = 0x40; // Reset all PCA I

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