电源方案12v1.5A详细设计

Cost (US Cent) / unit
Sub-Total (Cent)
12V, 1.5A Adapter
iWatt Confidential – Do Not Copy
8 Feb 2007
Page: 6
6. Regulation, Ripple and Efficiency Measurement
4. Transformer Construction
SCHEMATIC
Winding Direction Clockwise looking from Bottom side of Bobbin
Bottom Side
1
T1-B
13T Secondary
Primary
90T
T1-A 2 4
Bias/Sense 13T
Free convection, sea level
Symbol
VIN fLINE
Min
90 47
Typ
Max
264
Units
VAC Hz W V A mVP_P
2 Wire
Comment
50/60
63 0.5
VOUT IOUT VRIPPLE
11.4 0
12
12.6 1.5 200
Measured at the End of DC Output cable
VIN (VAC) IIN(mA) 8.9 117 90 208 298 392 9 98 115 174 247 318 16 60 230 103 146 187 18 56 264 94 132 168 PIN(W) 0.226 5.71 11.13 16.80 22.62 0.259 5.68 11.13 16.62 22.20 0.457 6.08 11.45 16.73 21.94 0.478 6.35 11.65 16.82 22.08 VOUT(V) 12.41 12.22 12.19 12.17 12.13 12.43 12.22 12.19 12.16 12.14 12.40 12.22 12.20 12.17 12.16 12.40 12.22 12.20 12.18 12.15 IOUT(A) 0 0.375 0.750 1.125 1.500 0 0.375 0.750 1.125 1.500 0 0.375 0.750 1.125 1.500 0 0.375 0.750 1.125 1.500 VRIPPLE (mVP-P) 20 102 100 165 190 20 90 110 140 145 20 90 105 120 120 22 90 120 130 120 4.583 9.150 13.703 18.225 72.17 78.54 81.47 82.54 Note: Output voltage measures end of PCB end 12V, 1.5A Adapter iWatt Confidential – Do Not Copy 8 Feb 2007 Page: 7 1.83 204 78.68 4.583 9.150 13.691 18.240 75.37 79.91 81.84 83.14 1.83 182 80.06 4.583 9.143 13.680 18.210 80.68 82.14 82.31 82.03 75.01 1.88 107 81.79 4.583 9.143 13.691 18.195 80.25 82.14 81.50 80.44 1.85 87 81.08 Meet CEC With lot of margins ! POUT (W) η(%) OCP (A) PIN_S/C (mW) Average η (%) CEC Standard η (%)
Description
FUSE,2A/250V 07K471 UU9.8, 25mH min. DM-Chock,Φ6X8,8uH CM-Chock,Φ10x5x6,600uH 2.4M,SMD-1206 820K,SMD-1206 68K, 2W 68R, 1W 10K,SMD-0603 TRIM,SMD-0603 2.7K,SMD-0603 8.2Kk,SMD-0805 10R,1/8W 1R,SMD-0805 22K, SMD-0805 10R, SMD-1206 1.5K,SMD-1206 100R,SMD-0805 1.0M,SMD-1206 33uF/400V,13x25.5,E-CAP 105℃ 1000uF/16V,10x20 ,E-CAP 105℃ 2.2nF,500V MIN 22pF,SMD-0805 1nF,SMD-0805 0.1uF,SMD-0805 22uF/50V,5x11.5,E-CAP 85℃ 330uF,6.3x11.5,E-CAP 85℃ 1nF/100V,SMD-0805 0.22uF,X-CAP,X2 iW1689,SOT23-5 FR107, DO-41 1N4148,SMD-DL35 FR104,DO-41 Y2010DN,TO-220 FQPF5N60C,TO-220 EE25 Total BOM (Based on 100K/M volume)
IOUT=1.5A @TA = 25 ℃ 20 MHz Bandwidth
POUT IOUT_MAX
18 2 78
W A %
Auto-restart
η
Measured at end of PCB, VIN = 90VAC POUT = 18W. (TA = 25 ℃)
12V, 1.5A Adapter
T1-A(S) 2 (F)
2UEW 0.3mmx1 30T 2UEW 0.3mmx1 30T
MATERIALS:
1. 2. 3. 4. 5. Core : EE25 (Ferrite Material TDK PC40 or equivalent) Bobbin : EE25Horizontal with Extended Secondary stub. Magnet Wires (Pri) : Type 2-UEW – size see details Magnet Wire (Sec) : Triple Insulated Wires – size see details 1 Layer Insulation Tape : 1 4 Turn of 3M1298 or equivalent.
iW1689 Design with MOSFET For 12V1.5A Adapter
General Design Specification : 1. 2. 3. 4. AC Input Range 90-264Vac DC Output 12V, 1.5A Max Ripple 200mVp-p No Y-Cap design
EE25 Transformer
Top side
Primary Side
Secondary Side
Bottom side
iW1689 Digital Controller 12V, 1.5A Adapter iWatt Confidential – Do Not Copy 8 Feb 2007 Page: 4
1(S) 4 (S) T1-B (F) T1-A (S)
2UEW 0.3mmx1 30T 2UEW 0.18mmx3 17T– Shield Triple Insulated Wire 0.55mmx1 13T – Secondary
Cut wire and leave it open at the end of winding
iWatt Confidential – Do Not Copy
8 Feb 2007
Page: 2
2. Schematic
12V, 1.5A Adapter
iWatt Confidential – Do Not Copy
8 Feb 2007
Page: 3
3. Circuit Board Photograph
1. Specification
Description
Input Voltage Frequency No-load Input Power (264VAC) Output Output Voltage Output Current Output Ripple Voltage Total Output Power Continuous Output Power Over Current Protection Efficiency Environmental Conducted EMI Safety Ambient Temperature TAMB Meets CISPR22B / EN55022B Designed to meet IEC950, UL1950 Class II 0 40 °C
90VAC, Full Load VOUT_MAX=11.96V
264VAC, No Load VOUT_MAX=12.52V
264VAC, Full Load VOUT_MAX=11.96V
12V, 1.5A Adapter
iWatt Confidential – Do Not Copy
8 Feb 2007
Page: 5
5. Bill of Material
Item
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
Qty.
1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 5 2 1 1 1 1
ห้องสมุดไป่ตู้
4 (F) 5 (S) T1-B(F)
2UEW0.18x4 13T –Bias Tape 1 Turn Triple Insulated Wire 0.55mmx1 13T – Secondary
1 4
5
ELECTRICAL SPECIFICATIONS:
1. 2. 3. Primary Inductance (Lp) = 650uH @10KHz Primary Leakage Inductance (Lk) < 40uH @10KHz Electrical Strength = 3KV 50/60Hz, 1 Min. (Test between pins 1~5 to pins T1-A~T1-B)
Ref.
F1 VDR1 L1 L2 L3 R1,R2 R3,R4, R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17,R18 C1 C2 C3 C4 C5 C6 C7 C8 C9 CX1 U1 D1,D2,D3,D4,D5 D6,D8 D7 D9 Q1 T1
7. Output VI Characteristics
VIN=90VAC,Temp.25℃ VIN=264VAC,Temp.25℃
V (2V/Div)
V (2V/Div)
I (0.5A/Div)
I (0.5A/Div)
Note: Output voltage is measured at DC cable end.
FINISHED :
1. Cut remained of Pin-3,6-10 after wires termination 2. Varnish the complete assembly
12V, 1.5A Adapter
iWatt Confidential – Do Not Copy
8 Feb 2007
Page: 9
9. Output Voltage Rising time
90VAC, No Load TRising=10.0mS
90VAC, Full Load TRising=26.4mS
12V, 1.5A Adapter iWatt Confidential – Do Not Copy 8 Feb 2007 Page: 8
8. OVP Performance
-R9 is shorted, or R7(or R10) is opened.
90VAC, No Load VOUT_MAX=12.44V