భፋኧՏ࣬ਣႝྍኳಔϐी 1 TFT (LCD Display) (Digital Photo Frame, DPF) ( ) 2 1 1 5V (Boost Converter) (Charge-Pump Converter) (Multi-Output Converter) Regulator) (Buck Converter) DSP 1 2(A) I/O (Linear (Memory) 1(B) (series-pass element) 2(C) DC Source Energy Pond Energy + Load Reservior (A) DC Source Energy Pond Energy + Load Reservior (B) DC Source Series-Pass Element + Energy + Load Reservior (C) 2 S2 3 (Duty Ratio) S1 S2 (Dead Time) S2 MOSFETs (Body Diode) Voltage) (Schottky Diode) S2 VIN S1 L VOUT S2 C 3 (Forward 3 5V 3-1 4 LED - AIC1882 USB Switch - AIC1516 IC - AIC3643 - AIC1747 & AIC1190 AIC3643 (Current-Mode Pulse-Width-Modulation) 1.2MHz 100mV LCD LED AIC1882 1MHz LCD Gate AIC1882 Gate Gate U1 2 1 EN 3.3Vo AIC1190-33 VIN 4 VOUT EN 5 BP GND C1 2.2uF C2 2.2uF 3 C3 22nF L1 D1 SR24 6.8uH U3 1 AIC1747-25 2.5Vo VIN 2 GND U4 R3 4 BP 3 EN R1 91K 5 VOUT C6 1uF EN 100k C7 1uF C8 0.1nF 1 2 VIN 1 EN AIC1190-18 EN C10 0.1uF 5 INTG 4 10 4 BP FB 3 1.8Vo VOUT RDY 2 R4 U2 +10Vmain C4 10uF 5 C11 0.1uF 6 7 GND C14 2.2uF 8 C15 2.2uF AIC1882 TGND LX PGND IN SUPP GND DRVP REF SUPN FBP DRVN FBN SHDN 3 C17 22nF C5 3.3uF*3 R2 13K 16 15 14 13 C9 0.1uF 12 11 C12 0.1uF C13 0.1uF 10 9 C16 0.1uF SD D3 BAT54S R5 5Vi 10K U5 7 C24 6 4.7uF 5 CTLA 1 CTLA IN 2 FLGA GND FLGB OUTB CTLB C21 33uF R9 R10 50k 200k C19 0.1uF C23 0.22uF C22 680pF 3 4 CTLB OUTB C25 33uF L2 6.8uH D2 SS1040 U6 C27 2.2uF VIN SHDN +15Vpos C18 1uF OUTA AIC1516 OUTA R6 50k FLGB R8 10K 8 550k FLGA R7 SW LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED8 LED9 LED10 LED11 LED12 C26 1uF*3 SHDN OVP GND FB AIC3643 LED13 LED14 LED15 LED16 LED17 LED18 RFB1 RFB2 RFB3 RFB4 RFB5 RFB6 5 5 5 5 5 5 4 D4 BAT54S C20 1uF -5Vneg 3-2 AIC3643 I L2 ΔIL 2 = VIN D 3643 fOSC _ 3643 ⋅ L 2 fOSC_3643 D3643 (1) AIC3643 fOSC_3643=1.2MHz IL2=400mA VOUT_LED=11V VIN (2) L2 ≥ D3643 ≈ 5.7μH fOSC _ 3643 ⋅ ΔIL 2 L2 6.8μH IOUT_LED(MAX) IL 2 _ PEAK = IIN _ 3643 (max ) + = 2 × fOSC _ 3643 ⋅ L 2 η ⋅ VIN + η 120mA VIN IOUT _ LED(MAX ) ⋅ VOUT _ LED II. L2 0.8 D3643 VIN 2 × fOSC _ 3643 ⎛ ⎞ VIN ⎜1 − ⎟ ≈ 497mA ⎜ VOUT _ LED ⎟⎠ ⋅ L2 ⎝ (C27) Equivalent Series Resistance, ESR C6 III AIC3643 1μF/16V (RFB1~RFB6) LED RFB1 ~ RFB6 = ILED VFB _ 3643 ILED = 20mA 100mV = 5Ω 20mA RFB1~RFB6 (4) 3-3 AIC1882 3-3-1 I. (L1) ΔIL1 = VIN fOSC _ 1882 ⋅ L1 fOSC_1882 D1882 D1882 AIC1882 fOSC_1882=1MHz L1 ≥ VIN fOSC _ 1882 ⋅ ΔIL1 L (5) IL1=400mA D1882 ≈ 6.3μH 6.8μH Vmain=10V (6) (4) (3) Imain(MAX) IL1 _ PEAK = IIN _ 1882 (max ) + η ⋅ VIN II. 0.8 VIN D1882 2 × fOSC _ 1882 ⋅ L1 Imain(MAX ) ⋅ Vmian = η 200mA + VIN 2 × fOSC _ 1882 ⎛ V ⎞ ⎜⎜1 − IN ⎟⎟ ≈ 684mA ⋅ L1 ⎝ Vmain ⎠ (7) (C6) Vmain C6 ≥ 30mV (8) Imain (MAX ) D1882 ≈ 3.4μF fOSC _ 1882 ⋅ ΔVmain (8) ESR ΔVmian = ΔID1 ⋅ ESR (9) C6 III. (R1 3.3μF/16V R2) R2 ⎛V ⎞ R1 = R 2 × ⎜ mian − 1⎟ = 91kΩ ⎝ 1.25 ⎠ 13kΩ R1 (10) (C23) IV. AIC1882 Type II Rcomp Rcomp Ccomp Ccomp1 ESR ESR AIC1882 Rcomp Ccomp1 IC Ccomp1 C23=680pF 3-3-2 I. (C19 & C21) IPOS=INEG=30mA VNEG=50mV C19 ≥ C 21 ≥ : IPOS 2 × fOSC _ CHG × ΔVPOS INEG 2 × fOSC _ CHG × ΔVNEG fOSC_CHG VPOS= = 0.6μF (11) = 0.6μF (12) AIC1882 AIC1882 1μF/16V II. (C16 & C19) 1:10 0.1μF 0.1μF/16V III. (R5,R6,R9 R6 R9 R10) 50kΩ R5 ⎞ ⎛V R 5 = R 6 ⎜⎜ POS − 1⎟⎟ = 550kΩ V ⎠ ⎝ REF R10 = R 9 VPOS AIC1882 4 VNEG VREF = 200kΩ R10 (13) (14) (13) (14) VNEG VREF