低電壓低功率電源轉換積體電路

1. 低電壓低功率電源轉換積體電路 陳建中 台北科技大學電子工程系

2. 簡歷 • 台北工專五年制電機科畢業(1981~1986) • 高考電機類科及格(1986) • 電機技師(1987) • 中油高雄總廠電機工程師(1988~1990) • 台灣大學電機所碩士班畢業(1990~1992) • 台灣大學電機所博士班畢業(1992~1995) • 龍華科技大學電子系副教授(1995~2004) • 台北科技大學電子系副教授(2004~)

3. 大綱 • 電源轉換電路的現況 • 電源轉換積體電路的應用 • 低電壓電源轉換電路的電路架構 • 低電壓電源轉換電路的電路的未來發展 • 電源晶片研究主題 • 結語

4. 電源轉換電路的現況

5. 電源轉換積體電路的應用

6. 電源轉換積體電路的應用

7. 電源轉換積體電路的應用 • 電腦,筆記型電腦, 工作站,……… • 平面顯示器,軟性電子,……… • 手機,PDA, i-pod,…… • 照明設施,…… • 生醫電子,居家照護,…….. • 綠色產業,優質生活,…… • 需要用到電源的設施!!!....

8. 低電壓電源轉換電路的電路架構 • 低電壓降電壓調整器 • (Low-Dropout Regulator) • 切換電容式電源轉換電路 • (Switched-Capacitor Power Converter) • 切換式電源轉換電路 • (Switching-Mode Power Converter) • 音頻與視頻放大器 • (Audio and Video Amplifiers)

9. 電源轉換電路的重要規格 • Voltage and Current Rated • Output Ripple • Line Regulation • Load Regulation • Transient Response • Power Supply Rejection • Output Noise • Temperature coefficient

10. 低電壓降電壓調整器的電路架構

11. 效率

12. 低電壓降電壓調整器的特性(1) • Advantage • Low Ripple • Low Noise • Small Chip Size • High Integration • No Inductor • Small Output Capacitor • Without Switching Noise

13. 低電壓降電壓調整器的特性(2) • Disadvantage • Low Power Efficiency • Low Loading Current • Without Power Inversion Function • Without Voltage Boost Function

14. 切換電容式電源轉換電路架構

15. 效率 Vin: Input voltage Vout: Output voltage SQin: Total input charge during one switching period SQout: Total output charge during one switching period

16. 切換電容式電源轉換電路特性(1) • Advantage • Easy Design • High Integration • With Step-Down and Step-Up Converter • With Power Inversion Function • No Inductor • Few External Devices

17. 切換電容式電源轉換電路特性(2) • Disadvantage • Power Efficiency Dependent on Input and Output Voltages • Low Loading Current • Switching Noise • Output Ripple

18. 切換式電源轉換電路架構

19. 切換式電源轉換電路特性(1) • Advantage • Higher Efficiency • Higher Loading Current • Higher Power

20. 切換式電源轉換電路特性(2) • Disadvantage • With Inductor • Higher Ripple • Higher Switching Noise • Larger Size • Higher EMI Noise

21. 未來發展趨勢(1) • High Efficiency • Low Voltage and High Current • High Integration • Multi Outputs • Multi Phases • Multi Power Sources • Low Noise

22. 未來發展趨勢(2) • Green Mode • Green Power • Portable Applications • Digital Controlled • Solution of System View • Power Management

23. 電源晶片研究主題 • Low-Bounce LDO • Switched-Capacitor Converter • Switching-Mode DC-DC Converter • Class-D Amplifier • Battery Charger • AC-DC Booster for RFID

24. A Capacitor-Free Fast-Transient-Response LDO

25. A Capacitor-Free Fast-Transient-Response LDO

26. Power Transistor Rm Gm A Capacitor-Free Fast-Transient-Response LDO

27. A Capacitor-Free Fast-Transient-Response LDO (a) (b) The experimental results of proposed LDO; from top to bottom, the waveforms are output voltage Vout, and output current Iout (a) from 100mA to 10mA. ( horizontal scale: 500ns/div; vertical scale: 1V/div, and 50mA/div, from top to bottom.) ; (b) from 10mA to 100mA. ( horizontal scale: 500ns/div; vertical scale: 1V/div, and 50mA/div, from top to bottom.)

28. A Capacitor-Free Fast-Transient-Response LDO (a) (b) The experimental results of proposed LDO; (a) the waveforms is the noise density of the output with light loading current; (b) the waveforms is the noise density of the output with 100mA loading current

29. A Capacitor-Free Fast-Transient-Response LDO

30. A Capacitor-Free Fast-Transient-Response LDO

31. A Capacitor-Free Fast-Transient-Response LDO [8] Ka Nang Leung; Mok, P.K.T.; Sai Kit Lau: “A low-voltage CMOS low-dropout regulator with enhanced loop response,” Proceedings of the International Symposium on Circuits and Systems, Vol. 1, Page(s):I-385 - I-388, 23-26 May 2004. [9] Sao-Hung Lu; Wei-Jen Huang; Shen-Iuan Liu; “A Fast Settling Low Dropout Linear Regulator with Single Miller Compensation Capacitor,” Asian Solid-State Circuits Conference, Page(s):153 – 156, November 2005. [10] Dongpo Chen; Lenian He; Xiaolang Yan; “A Low-dropout Regulator with Unconditional Stability and Low Quiescent Current,” Proceedings of the International Conference on Communications, Circuits and Systems, Vol. 4, Page(s):2215 – 2218, June 2006.

32. Switching-Mode DC-DC Converter

33. Switching-Mode DC-DC Converter • On-Chip Current Sensing Circuit

34. Switching-Mode DC-DC Converter • Hysteresis Current Controlled Circuit

35. 2μs Switching-Mode DC-DC Converter

36. Switching-Mode DC-DC Converter

37. Switching-Mode DC-DC Converter [5] C. F. Lee and P. K. T. Mok ,” A monolithic current-mode CMOS DC-DC converter with on-chip current-sensing technique,” IEEE Journal of Solid-State Circuit, Vol. 39,  NO.12,  pp. 3–14 Jan. 2004 [8] A. Barrado, A. Lázaro, R. Vázquez, V. Salas and E. Olías ,” The fast response double buck DC-DC converter (FRDB): operation and output filter influence,” IEEE Transactions on Power Electronics, Vol. 20,  NO 10,  pp.1261 – 1270, Nov. 2005 [11] H. Lee, P.K.T Mok. and W.H. Ki, ” A novel voltage-control scheme for low-voltage DC-DC converters with fast transient recovery,” The 2000 IEEE International Symposium on circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva, Vol. 1, No 28-31, pp. 256 - 259 , May 2000 .

38. Switched-Capacitor Charger

39. Switched-Capacitor Charger

40. Switched-Capacitor Charger

41. Switched-Capacitor Charger

42. Switched-Capacitor Charger

43. Switched-Capacitor Charger

44. Switched-Capacitor Charger

45. Switched-Capacitor Charger

46. LDO-based Charger

47. LDO-based Charger

48. LDO-based Charger

49. LDO-based Charger

50. LDO-based Charger