PDF《STBC21》

30 Appendix B Charging parameters.31 Appendix C Charging control

36 Appendix D Temperature thresholds

37 Appendix E LED configurations diversified for customer (each customer one pattern)40 STBC21 Contents Doc ID

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1 3/54 Appendix F LED display modes

42 Appendix G NVM commands register.46 Appendix H Charger, battery and alarm status registers

47 H.1 Layout guidelines

49 7 Package mechanical data

51 8 Revision history

53 List of tables STBC21 4/54 Doc ID

023256 Rev

1 List of tables Table 1. Device summary

1 Table 2. External components

7 Table 3. Pin description

8 Table 4. Absolute maximum ratings

9 Table 5. Thermal data.9 Table 6. Electrical characteristics (DC)10 Table 7. Start of charge

17 Table 8. Write single register

26 Table 9. Read single register

27 Table 10. Configuration registers map

30 Table 11. Control registers map

30 Table 12. Timer registers summary

31 Table 13. Timer-2 description

31 Table 14. Timer-3 description

32 Table 15. Charging current registers

32 Table 16. SET1 register description

32 Table 17. ISET3 register description

33 Table 18. Constant voltage register

33 Table 19. CV1 bit description

33 Table 20. CV2 bit description

34 Table 21. CV3 bit description

34 Table 22. CV4 bit description

34 Table 23. Halving register.34 Table 24. ISET2 (CV1) bit description

34 Table 25. ISET2 (CV2) bit description

35 Table 26. ISET2 (CV3) bit description

35 Table 27. ISET2 (CV4) bit description

35 Table 28. Charging control

36 Table 29. Auto recharge bit description

36 Table 30. Temperature thresholds

37 Table 31. Th-h reg

37 Table 32. Th reg

38 Table 33. Tl reg.39 Table 34. Hys reg

39 Table 35. LED configurations

40 Table 36. LED display modes.42 Table 37. LED frequency register

42 Table 38. LED duty cycle register.43 Table 39. Address: 10H, Reset state:

00000000 46 Table 40. NVM commands

46 Table 41. Address: 11H, Reset state:

00000000 47 Table 42. Address: 12H, Reset state:

00000000 47 Table 43. Address: 13H, Reset state:

00000000 48 Table 44. Digital charger status

48 Table 45. Address: 14H, Reset state:

00000000 48 Table 46. Battery temperature range

49 Table 47. HTSSOP-14L (5 x 4.4 mm) mechanical data

51 Table 48. Document revision history

53 STBC21 List of figures Doc ID

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1 5/54 List of figures Figure 1. Block diagram

6 Figure 2. Typical application schematic

7 Figure 3. Pin connections (top through view)8 Figure 4. Charging process flowchart

14 Figure 5. Battery connection detection flowcharts

16 Figure 6. Temperature ranges compatible with PSE, power safety electrical

18 Figure 7. V-I characteristics

19 Figure 8. Battery temperature alarm after charging starts (at battery insertion and at recharge) flowchart

19 Figure 9. Battery temperature alarm during charge flowchart

20 Figure 10. Temperature detector schematic

20 Figure 11. Charging process diagram

21 Figure 12. Charging process diagram

22 Figure 13. Battery alarm flowchart

24 Figure 14. Charger alarm flowchart

24 Figure 15. LEDs control circuit.25 Figure 16. Junction shutdown temperature detection

26 Figure 17. Layout board (top through view)49 Figure 18. Layout board (top view)50 Figure 19. Drawing dimension HTSSOP-14L (5 x 4.4 mm)52 Block diagram STBC21 6/54 Doc ID

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1 1 Block diagram Figure 1. Block diagram AM10414v1 VCC PHC VCP ISET RES3 RES2 RES1 PWRSIS PWR BIAS BANDGAP POWER ICHARGE VFLOAT EOC OCP I2 C NVM BAT_OVP BAT_LOW FAST_CH RECHARGE POR VCC_OVP VCC_OK ASD 4.23V VBAT 1.0V VBAT 3.0V VBAT 3.9V 2.6V VCC 9.0V VCC 2.8V VCC VBAT Vo? + _ + _ + _ + _ + _ + _ + _ + _ + _ + _ + _ _ + + _ + _ + _ + _ TEMP LED2 LED1 VREF BAT VCC THERMAL 115°C/95°C TH_OFF TH_H TH TL TL_OFF BAT_NO BAT_HOT 0.75V 0.79V/1.002V 0.89V/1.1V 1.74V/1.95V 2.128V 2.425V 0.505V GND + L O G I C VBAT_SNS CLAMP STBC21 Block diagram Doc ID