剖析可攜式電源管理電路的工作原理及IC 介紹

1 IC (3G) (MP3) (GPS) .. IC IC ~ 270~300 LWh 110~130 KgWh ~ 220~300 LWh 75~100 KgWh IC ~ (LDO) (Charge pump) (Buck converter) (Single-ended Primary Inductor Converter SEPIC) (Low-Dropout LDO) VI >Vo VI Vo Vdrop out = VI - Vo Vo P = I Vdropout Vdropout I (LDO)

2 25% IC LM317 LM337 Texas Instrument TPS6 ControlCircuitOV1R2 RrVdsRLR_+_+dropoutVIV+_ 1. 2. VI =Vout 85% VI >Vout 3. EMI (Audio) (Radio) 4. 5. 110x TPS6112x TPS6113x Linear Technology LT1963 LTC1705 LT1764 National Semiconductor LP398X MAXIM MAX886X/887X/888X ( Texas Instrument Linear Technology National Semiconductor MAXIM ) (Charge pump) (Charge pump) (Switched capac (Charge pump) IC (b) D1 D2 C1 Vc1 Vc1 = (Vcc - Vd) (2)C1 Vc1 (c) D1 D2 C2 itor converter) (Charge pump) IC IC C1,C2 (a) NE555 4009UB D1,D2 C1,C2 1C2 CCCVCLKOV_+ (1) Vd I C1 C2 -(Vcc-2Vd) C1 CCV1C2C1D2 DOV_+ (a) (Charge pump) (b) (CLK) (c) (CLK)

3 MAXIM SW7, SW5 (ON) (OFF) C1,C2 1C2C1D2 DCCVOV_++_I1CV 1C2C1D2 DOV_+I+_1CV IC MAX619 IC (1) SW1, SW3 VI (2) SW2, SW4, SW6 (OFF) 5V 20mA 3V 5V, 50mA : 3)VI Vo Iout (LDO) VI C1,C2 C4 Vo VI 3 rV1R2 RSWITCHCONTROLIV2C1 CSW1SW2SW3SW4SW5SW6SW7OV3C4C+_+_ MAXIM IC MAX619 MAX619 ~ Power loss = Iout [(2 3)VI-Vo] (2 (Charge pump) 1. (C pump) . LDO arge pump) IC Texas Instrument C1682 LTC1516/17 MAXIM /1912/1916 ON semiconductor NCP5603 ( IM (Buck converter) (a) (1) VL = VI - Vo (b) DT 0<D<1 (1) 23. EMI 4. VI / Vout 5.

4 (ChTPS601XX~TPS603XX Linear Technology LTMAX1570/1595 Texas Instrument Linear Technology MAX ) (Buck converter) Q1 Q2 VI Q1 Vo (2) Q1 Q2 C RL VL = - Vo (b) (1-D)T (b) : (VI -Vo)DT=Vo(1-D)T VI D T- Vo D T = VoT- VoD T IVVo=D Vo VI Q1,Q2 L C (Off) (On) L C 0<D<1 Q1,Q2 (On loss) (Switching loss) (Hysteresis loss) (Copper loss) (Ripple loss) 90% (a) (a) (b) DriverLRIVLCOV+_+_+_LV 1Q2Q LLIttOVIV_OV_VD T(1 D )T_ (b) 1. MOS FET .. EMI (Lay out) Vout/ VI ) rter) IC Texas Instrument LT1576 MAXIM Texas MAXIM ) Q VL1,mean VL2,mean 0 I - VL1,mean- VL2,mean = VI T23.

5 45. ( 6. (Buck conveTPS43000 TPS40021 Linear Technology LTC3404 LTC3713 MAX1970 MAX5073 ( Instrument Linear Technology SEPIC (Single-ended Primary Industry Converter) C L1 VI L2 C VC,mean = V Q D Q L1 DTVI = (1-D) T (Vout +Vd+Vc,mean-VI) = (1-D) T (Vout+Vd) IVVdVout+=D 1 D 1>D> IVVdVout+ >D>0 IVVdVout+ < 1 SEPIC ~ 10% VI D SEPIC (Charge pump) (SEPIC) IC Texas Instrument TPS6 MAXIM ( LDO BUCK SEPIC 1.))))

6 2. 3. EMI 4. 5. 6. 113X UCC39421 Linear Technology LT1512 LT1513 LTC1871 MAX668 MAX669 ( Texas Instrument Linear Technology MAXIM ) [6] ) 600mAh ~ LDO V battery = ~ 78%93% 86% 10%(600mAh 10%) 606060mAhmAh mAh1C2C1 DOV_+IV+_1L2LC+_CVPWMQ battery = ~ 91%96% 86% 80%(600mAh 80%) 480mAh480mAh 480mAh battery = ~ 00 86% 10%(600mAh 10%) 60mAh60mAh 60mAh 00 mAh 516mAh 86% ( [6] ) (VCO) (PLL) LDO DSP PowerManagementSystemBaseband(DSP,ARM,Me mory)RFUp & DownPLL&VCOTCXOW-LEDB acklightLEDsVibratorMotorColorLCDDSC ImageSensor(CCD)DSC ~ ~ ~ ~ Texas Instrument TP65010, TPS5100, TPS61130 MAXIM MAX1586A/B, MAX8621 IC DC DC IC [1] [2] [3] [4] Ned Mohan, Tore M.

7 Undeland, and William P. Robbins, Power electronics :converters, applications, and design , Wiley, New York, 667pp, 1989. [5] Pressman, Abraham I., Switching power supply design , McGraw-Hill, New York, 926pp, 1991 [6] Jeff Falin, Texas Instrument, 2004 6 [7] Landa Pham, Texas Instrument, 2004 6 [8] IC 2001 [9] 1994