BYD BF1520-B For 5V2A手机充电器方案

1
13005 TO-126 HFE>25 BVcbo>700V
1
Y-CAP 470pF/250V
1
35
-7-
7. Transformer Drawing
-8-
8. Efficiency
Vin (Vac) 115V/ 60Hz 230V/ 50Hz
Measure at end of PCB
Pin (W) Iout (mA) Vout (V) Pout(W)
1
SMD Capacitor 0805 1nF/50V 105℃ ±20% X7R
1
SMD Resistor 0603 4.7K ±1%
1
SMD Resistor 0805 2.1R ±1%
1
SMD Resistor 0805 4.3R ±1%
1
SMD Resistor 0805 22R ±5%
2
SMD Resistor 1206 5.1M ±5%
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
Designator C1
C2 C3 C4 C5 C6 C7 C8 R1 R2 R3
R4 R16 R5 R10
R6 R13 R7
R8 R9 R11 R12 R14 R15 BD1 D1 D4 D2 D3 IC1 L1 L2 FR1 TF1 QI CY1 Total
Description
Qty
E-Capacitor 4.7uF/50V 4*8 105℃ ±20%
1
E-Capacitor 10uF/400V 8*14 105℃ ±20%
2
SMD Resistor 0603 13K ±1%
1
SMD Resistor 1206 1.5M ±5%
2
SMD Resistor 0603 51R ±5%
1
SMD Resistor 0603 3.6K ±1%
1
SMD Resistor 1206 200K ±5%
1
SMD Resistor 0603 3.0K ±1%
/
/
KV
/
℃
Free convection,sea level
-4-
4. Schematic
Figure 2 Design Schematic
-5-
5. PCB Layout
PCB Top
PCB Bottom
Figure 3 PCB Layout 43.0 mm x 38.2 mm
-6-
6. Bill of Materials
9.38
1500
5.1
7.65
81.56
12.59
2000
5.15
10.3
81.81
Level V Efficiency(%) :73.4(0.075*LnPo+0.561)
Europe COC Tier 2 Efficiency(%) :78.7(0.0834*LnPo-0.0014*Po+0.609)
2
Solid Capacitor 820uF/6.3V 6*10 105℃ ±20%
1
E-Capacitor 680uF/6.3V 6.3*12 105℃ ±20%
1
SMD Capacitor 0603 47nF/50V 105℃ ±20% X7R
1
SMD Capacitor 1206 470pF/250V 105℃ ±20% X7R
BF1520-B For 5V2A Charger Design
Table of Contents
BF1520-B for High Efficiency Charger Design: (AC Input 90-264Vac,Output 5V 2A, No-Load Standby Power <100mW, Meet “Europe COC Tier 2 ”Efficiency)
4.75
5
5.25
0
/
2.4
Hale Waihona Puke Baidu
2
/
4.75
2
/
2.4
/
/
80
/
10
/
/
/
2.4
78.7
/
/
Time sequence
/
/
2
10
/
/
Environmental
Meets CISPR22B/EN55022B
Meets IEC950,UL1950,Class Ⅱ
15
/
/
-5
/
45
Vac
/
Hz
/
mW
230Vac
1
SMD Resistor 0805 300R ±5%
1
SMD Resistor 0805 3.3K ±5%
1
TB10S 1A/1000V
1
SMD Schottky Diode S54BLR 5A/40V SMB
2
SMD FAST DIODE RM 1A/1000V DO-123
1
SMD Diode M7 1A1000V SMA
F (KHz) 59.8 63.6
-9-
9.CV and CC Regulation
VOUT (V)
VI Curve (Vin=115Vac/60Hz)
5.5 5
4.5 4
3.5 3
2.5 2
1.5 1
0.5 0
1
1.3
1.6
1.9
2.2
2.5
IOUT (A)
VI Curve (Vin=230Vac/50Hz)
-3-
3. Power Supply Design Specification
Description
Symbol
Min
Type
Max
Units
Comment
Input Voltage
Vin
Line Frequency
F
Standby Power
/
Output Voltage CV
Output Current
-1-
1. Introduction
This document provides a reference design for a universal AC input, 5V 2A isolated fly-back adapter. For this design the BF1520-B is used. It contains the complete specification of the power supply, a detailed circuit diagram and PCB layout, the entire bill of materials required to build the power supply, drawing of the power transformer, and test data of the most important performance.
1
PWM Controller IC BF1520-B SOT23-6
1
Fixed inductor 220uH 0512
1
SMD Ferrite Bead 0805 1.5K @100MHz
1
Fusible Resistor 5.1R/1W 5%
1
Transformer EEL16-V Lp=1.2mH
V
Measured at end of USB
A
/
V
/
A
/
Measured at end of USB Iout=2A mV
20MHz Bandwidth
W
/
A
Auto-restart
Measured at end of USB %
Vin=115Vac&230Vac
S
Full load
mS
Full load
1. Introduction………………………………………………….…………….......................................2 2. Design Features……………………………………………………..................................................3 3. Power Supply Design Specification……………….…………………………………………….4 4. Schematic…………………………………………………………………………………………………....5 5. PCB Layout………………………………………..……………………………………………………….....6 6. Bill of Materials……………………………..…………………………….......................................7 7. Transformer Drawing…………………………………………………...………………………......8 8. Efficiency…………………………………….…………………………..…….......................................9 9. CV and CC Regulation………….………….………………………...........................................10 10. Output Ripple Voltage…………………………………………………………………………….11 11. Turn-on Delay Time ……………..………….…………………………………………………..12 12. Output Rise Time….…………………………..…………………………………………………..13 13. Dynamic Load Response ……………..……………………………………………………..14 14. MoU …………………………….………………..…………………………….…………………………15 15. Common Mode Noise…..……………..……………………………...…………………………16 16. Vce Waveform……………………….…..…………………..………………………………………..17 17. Thermal Test…………………………………....…………………………………………………...18 18. Conducted EMI …….………………..………………………………………………………………..19 19. Radiated EMI ………………………..………………………………………………………….......20
Output Voltage CC
Output Current
Ripple&Noise
Continuous Output Power
Over Current Protection
Active Mode Efficiency
Vout_cv Iout_cv Vout_cc Iout_cc Vripple
Pout Iout_max
η
Turn-on delay time Hold up time
Conducted/Radiation EMI Safety ESD
Ambient Temperature
/ /
/ TAMB
Input Section
90
/
264
47
50/60
63
/
/
100
Output Characteristics
Figure 1 Circuit Board Photograph
-2-
2. Design Features
AC input range 90-264Vac DC output 5V 2A Meet “100mW” no-load standby power consumption requirement Meet “Europe COC Tier 2” Efficiency requirement at end of USB Max Ripple Voltage < 80mV Meet “USB3.0” Dynamic Load Response Requirement
η(%)
AVG η(%)
0.03
0
5
0
/
3.11
500
5
2.5
80.39
6.25
1000
5.05
5.05
80.80
80.53
9.5
1500
5.1
7.65
80.53
12.81
2000
5.15
10.3
80.41
0.072
0
5
0
/
3.15
500
5
2.5
79.37
6.22
1000
5.04
5.04
81.03
80.94
5.5 5
4.5 4
3.5 3
2.5 2
1.5 1
0.5 0
1
1.3
1.6
1.9
2.2
2.5
IOUT (A)
-10-
VOUT (V)
10. Output Ripple Voltage
Vin=115V Full Load △V=66.8mV
-11-
Vin=230V Full Load △V=62.8mV