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PDF AND8099 Data sheet ( Hoja de datos )
| Número de pieza | AND8099 | |
| Descripción | Flyback Converter | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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AND8099/D
5.0 V, 2.0 A Flyback
Converter
Prepared by: Kristie Valdez
ON Semiconductor
http://onsemi.com
APPLICATION NOTE
The design of a switching power supply is an iterative
process which involves many variables that have to be
adjusted in order to obtain an optimized solution. However,
there are trade-offs which allow for a simple low cost, low
component, single sided board design method. This
application note provides a simple approach to designing
a converter utilizing the ON Semiconductor NCP1055
high voltage switch regulator. The easy-to-follow
step-by-step procedure guides the user into designing the
different blocks that constitute the power supply, mainly the
input block, the power stage, the magnetics, the snubber, the
output block, and the feedback loop. The circuit diagram,
bill of material, and PCB layout are also included at the end
of the application note. This power supply is specifically
designed for a 5.0 V, 2.0 A output and a maximum duty cycle
of 48%. It meets IEC and UL requirements. EMI is minimal
and a 70% achievable efficiency or greater is possible.
The NCP1055 is a family of monolithic high voltage
switching regulators designed to work in rectified AC line
sources and flyback converter applications. They are
capable of providing an output power ranging from 6.0 W to
40 W with a fixed AC input of 100 V, 115 V, or 230 V
and 3.0 W to 20 W with a variable AC input ranging from
85 V to 265 V. This device features an on-chip 700 V
SENSEFET™ power switch circuit, an active startup
regulator circuit which eliminates the need for an auxiliary
bias winding on the converter transformer, fault logic with
a programmable timer for converter overload protection.
Protective features provide power switch current limiting,
input under voltage lockout with hysteresis, thermal
shutdown, and restart fault detection. For more information,
please contact an ON Semiconductor sales representative or
log on to www.onsemi.com.
Design Parameters
The first step in designing a power supply is to define and
predetermine the input and output parameters.
Universal Input Voltage Range:
Vin(min) + 85 VAC, Vin(max) + 265 VAC
Output Specifications:
Vout + 5.0 V " 2%, Iout + 2 A
Input Power:
Pin
+
Pout
est.eff
,
an efficiency of 0.78 is a good starting
point for a flyback converter using
MOSFET technology:
Pout + 5 · 2.0 + 10 W
NPin
+
10
0.78
+
12.82
W
DC Rail Voltages at Low Line and High Line:
Vpeak(min) + Vin(min) · Ǹ2 + 85 · Ǹ2 + 120.21 VDC
Vpeak(max) + Vin(max) · Ǹ2 + 265 · Ǹ2 + 374.77 VDC
Average Input Current at Low Line:
Iin(avg)
+
Pin
Vin(low)
,
where Vin(low) + Vpeak(min) * Vripple * Vdiode;
Vripple + 32% Vpeak(min)
Iin(avg)
+
12.82
80.2
+
0.160
A
Input Peak Current:
Ipeak
+2
·
Iin(avg) ·
tsw
ton
Ipeak +
2
·
0.160 ·
10
4.8
ms
ms
+
0.667 A
© Semiconductor Components Industries, LLC, 2003
February, 2003 - Rev. 2
1
Publication Order Number:
AND8099/D
1 page  
AND8099/D
Table 1. Bill of Materials
Ref. Component Value
IC1 IC, 680 mA, 100 kHz, DIP8
IC2 Optocoupler, Dip
IC3 2.5 V Shunt Reg., TO-92
D1-4
1.0 A, 800 V, Gen. Purp.
D5 1.0 A, 600 V, Ultra Fast
D6 3.0 A, 40 V, Schottky
T1 Flyback Transformer
L1 Choke, Common Mode, 10 mH
L2 Choke, Power, 5.0 mH
C1 0.1 mF, Film, Radial
C2 33 mF, 400 V, Radial
C3 220 pF, 1.0 kV, 10%, Disc
C4 47 pF, 1.0 kV, 10%, Disc
C5 10 mF, 16 V, 20%, Radial
C6 100 pF, 1.0 kV, 10%, Disc
C7-9, C11
330 mF, 10 V, Radial
C10 0.1 mF, 50 V, Cer., Radial, 10%
C12 1.0 mF, 35 V, Tant., Radial, 10%
C13 0.001 mF, 50 V, Cer., Radial, 10%
R1 91 kW, 1.0 W
R2 2.2 kW, 1/2 W, 5%
R3 47 W, 1/4 W, 5%
R4 1.0 kW, 1/4 W, 5%
R5, R6
2.0 kW, 1/4 W, 1%
F1 2.0 A, axial
J1-2 Term. Block, 2 Pos., Plug and Header
Qty.
1
1
1
4
1
1
1
1
1
1
1
1
1
1
1
4
1
1
1
1
1
1
1
2
1
1
J3-4
Term. Block, 2 Pos., Inv. Plug and Header
1
Part Number
NCP1055P100
SFH615A-4
TL431AILP
1N4006
MUR160TR
1N5822
31592
40479
40480
XSC275V104-M15S
400V33-HS
NCD221K1KVY5F
NCD470K1KVSL
16V10
NCD101K1KVY5FAB2
10V330-HOSS
SR215C104KAA
105X9050
SR211C102KAA
MO-1-91K-5TR
1/2W-2.2K-5B
1/4W-47R-5
1/4W-1K-5B
CCF-55-2001FTR
251002TR1
1757242
1757019
1786404
1786174
Manufacturer
ON Semiconductor
Isocom
ON Semiconductor
ON Semiconductor
ON Semiconductor
ON Semiconductor
Midcom
Midcom
Midcom
Nissei
United Chem-Con
NIC Components
NIC Components
United Chem-Con
NIC Components
United Chem-Con
AVX
AVX
AVX
SEI
SEI
SEI
SEI
SEI
LittleFuse
Phoenix Contact
Phoenix Contact
http://onsemi.com
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet AND8099.PDF ] | |
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