RCC Design_Rev1.02
Copyright Wuming Electric Inc.
2003
输入 信息 输出 单位
RCC Design_Rev1.02.xls: RCC Flyback Transformer Design
Spreadsheet
ENTER APPLICATION VARIABLES Customer
VACMIN 200 Volts Minimum AC Input Voltage
VACMAX 240 Volts Maximum AC Input Voltage
Fmin 70 KHz Minimum OSC Frequency
VO 5 Volts Output Voltage
IO 0.7 Amps Output Current
eta 0.7 Efficiency Estimate
Z 1 Loss Allocation Factor
tC 3 mSecondsBridge Rectifier Conduction Time Estimate
CIN 6.8 uFarads Input Filter Capacitor
D 0.2
T 14.2857143 uS Max Time of Cycle
Ton 2.85714286 uS On time of Cycle
Toff 11.4285714 uS Off time of Cycle
d 2 A/mm^2 副边线圈电流密度
ENTER Output Diode Parameters
Output Diode 1N5819
VR 40 Volts Diode Maximum Peak Repetitive Reverse Voltage
ID 2 Amps Diode Average Forward Current
VD 0.6 Volts Diode Forward Voltage drop
Vo_1 12 Volts Auxiliary Output Voltage
VD_1 0.6 Volts Auxiliary Diode Forward Voltage Drop
Io_1 Amps Auxiliary Output Current
Vo_2 5 Volts secound Output Voltage
VD_2 0.6 Volts secound Diode Forward Voltage Drop
Io_2 Amps secound Output Current
Vo_3 5 Volts thired Output Voltage
VD_3 0.6 Volts thired Diode Forward Voltage Drop
Io_3 Amps thired Output Current
PO 3.5 Output Power
P 6.1 Total Power
VB 23 Volts Driver Output Voltage
VD_B 0.1
IB 0.015 A Driver Output Current
IB_min 0.014375 A
ENTER Other Parameters
BP 2000 Gauss Target Peak Flux Density at Maximum Current limit
Direct Switch Type MJE13001
Bvceo 450 Volts
Imax 0.5 Amps
Hfe 16
Design Parameters
VMIN 272 Volts Minimum DC Input Voltage
VMAX 339 Volts Maximum DC Input Voltage
IP 0.23 Amps Peak Primary current
N12 0.08
LP 3377 uHenriesMinimum Primary Inductance
LS 22.85714 uHenries
RS 3 OM
ENTER TRANSFORMER CORE/CONSTRUCTION
Core Type ee16 EE16
AE 0.192 cm^2 Core Effective Cross Sectional Area
LE 3.5 cm Core Effective Path Length
AL 1140 nH/T^2 Ungapped Core Effective Inductance
BW 8.5 mm Bobbin Physical Winding Width
M 1 mm Safety Margin Width
Lg 0.30 mm Gap Length NON GLASS BEAD Construction
NP 203 Turns Number of Primary Turns
NS 17 Turns Number of Secondary Turns
NB 18 Turns
RB < 1434 OM
PIV 28 Volts
N1 38 Turns Auxiliary Number of Turns
PIV1 64 Volts Auxiliary Rectifier Maximum Peak Inverse Voltage
RCC 反激式电路设计
表
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RCC Design_Rev1.02
Copyright Wuming Electric Inc.
2003
输入 信息 输出 单位
RCC Design_Rev1.02.xls: RCC Flyback Transformer Design
Spreadsheet
RCC 反激式电路设计表
N2 17 Turns Auxiliary Number of Turns
PIV2 28 Volts Auxiliary Rectifier Maximum Peak Inverse Voltage
N3 17 Turns Auxiliary Number of Turns
PIV3 28 Volts Auxiliary Rectifier Maximum Peak Inverse Voltage
Vc 4.8 Volts 稳压电容上电压
Vz 5.1 Volts 稳压管电压
Rp >0.0184 Wate 3.48 OM 电流检测(电流限制)电阻
CURRENT WAVEFORM SHAPE PARAMETERS
IAVGmax 0.02 Amps Maximum Average Primary Current
IAVGmin 0.01 Amps Minimum Average Primary Current
IRMS 0.09 Amps Primary RMS Current
IR 0.28 Amps Primary Ripple Current
ISP 2.80 Amps Maximum Peak Secondary Current
ISRMS 1.14 Amps Secondary RMS current
IRIPPLE 0.90 Amps Output Capacitor RMS Ripple Current
ISPMAX 3.05 Amps Maximum Power Peak Secondary Current
TRANSFORMER PARAMETERS
L 5 Number of Primary Layers
BM 1993 Gauss Operating Flux Density at Max Current Limit
BAC 989 Gauss AC Flux Density for Core Loss Curves (0.5 X Peak to Peak)
ur 1654 Relative Permeability of Ungapped Core
BWE 32.5 mm Effective Bobbin Width
OD 0.16 mm Maximum Primary Wire Diameter including insulation
INS
0.04
mm Taping between primary layers can be eliminated using "Class 0" (Asia),
"Grade 2"(Europe) or "Heavy Nyleze" (USA) wire
DIA 0.12 mm Bare conductor diameter
AWG 37 AWG Primary Wire Gauge (for low capacitance AWG<= 36 recommended)
CM 20 Cmils Bare conductor effective area in circular mils
CMA 215 Cmils/AmpPrimary Winding Current Capacity (CMA > 200)
CMS 245 Cmils Secondary Bare Conductor minimum circular mils
AWGS 26 AWG Secondary Wire Gauge (Rounded up to next larger standard AWG value)
DIAS 0.41 mm Secondary Minimum Bare Conductor Diameter
DIA1 mm 第一副绕组线直径
DIA2 mm 第二副绕组线直径
DIA3 mm 第三副绕组线直径
Sc 11.66 mm^2 绕组占窗口静面积
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