bp5728 ROHM Co. Ltd., bp5728 Datasheet
bp5728
Manufacturer Part Number
bp5728
Description
Isolated Ac/dc Converter
Manufacturer
ROHM Co. Ltd.
Datasheet
1.BP5728.pdf
(4 pages)
www.rohm.com
©2010 ROHM Co., Ltd. All rights reserved.
Isolated AC/DC Converter
100-200VAC Input/12W Output
AC80 to 154V(100V )
AC154V to 286V(200V )
BP5728
6pin Input Voltage
2pin Input Voltage
3pin Input Voltage
3pin Input Current
Max Surface Temperature
Operating Temperature Range
Storage Temperature Range
Input voltage
Output frequency
Turn on voltage
Turn off voltage
Maximum Duty
Zero-Duty I
Over drain current
protection
Allowable Loss
Operating Principle
External Component Specifications
Absolute Maximum Ratings
Electrical Characteristics
Application Circuit (In case of 12V output)
1.When turned on
2.During operation
3.In overcurrent conditions :
C1,C2 :
C3 :
C4 :
C5 :
C7 :
C12 :
C13 :
D2 :
D3 :
D4 :
DB :
F1.F2 :
IC1 :
F1
ZNR1
Parameter
Parameter
Parameter
Noise reduction capacitors
Input smoothing capacitor
Noise reduction capacitor
Vdd smoothing capacitor
Output capacitor
Phase compensation capacitor
Noise reduction capacitor
Rectifier diode
Rectifier diode
Rectifier diode
Diode bridge
Fuse
BP5728
FB
C1
FL1
Be sure to use fuse for safety.
C2
Duty MAX
Symbol
Symbol
V
V
Idocp
V
DD
DD
Ioz
fo
IC1
DB
DD
:
:
C5 is charged by R2 when the power is on, and the switching starts
when the voltage at V
Vdd is supplied via Nd and FB current flows to PC1 once Vo exceeds the threshold voltage. Once PC1
turns ON a current Ioz flows through the transistor.
Also, FB current runs to Pin 2 of BP5728 when Vo exceeds the designed voltage and the constant voltage control is executed.
The input current will increase if the output power increases, and the overcurrent protection circuit will turn
ON once the Drain current exceeds the specified value (Idocp).
on
off
3
2
1
6
R1
C3
F2
Symbol
Tcmax
15.5
0.85
10V
15V
20V
R2
Topr
Tstg
Min.
V
V
V
8.9
7.7
C5
I
59
68
V
P
DD
(V
DD
FB
DD
D
D
D3
DD
R3
=15V, Vd=15V,I
Rated at 300VAC or higher
0.1 to 0.22µF
22µF / 450V
2200pF / 1kV
10µF / 50V
470µF / 35V low impedance
0.1µF / 50V
2200pF / AC250V
FRD 800V / 0.5A
80V / 0.1A
SBD 90V / 3A
800V / 1A
Use for safety
BP5728
C4
D2
NP
ND
DD
−25 to +105
PC1
16.5
1.15
Min.
−25 to +80
Typ.
217
269
314
−0.2 to +6
8.3
C13
12
65
75
T1
pin reaches the voltage threshold (17.5V max.)
Limits
800
0.64
105
NS
24
8
IC2
D4
R5
FB
R4
Max.
17.5
1.45
=0.1mA,SW1=R1,Ta=25°C, unless otherwise specified)
247
302
349
Typ.
C12
8.9
20
71
82
12V/0.5A(100V )
12V/1A(200V )
R9
C7
Unit
mA
°C
°C
°C
R8
W
R6
R7
V
V
V
Max.
Unit
kHz
281
338
388
mA
%
V
V
V
1/1
Pin
No. Terminal name
1
2
3
6
Vo
GND
−
I
V
V
I
I
FB
FB
FB
DD
DD
Unit
COM
mA
=0.5mA
=0.5mA
=0→1.55mA
V
FB
V
=0→17.5V
=17.5→0V
DD
D
IC2 :
FL1 :
R1 :
R2 :
R3 :
R4 :
R5 :
R6 :
R7 :
R8 :
R9 :
PC1 :
T1 :
ZNR1 :
Conditions
Conditions
V
SW1=R2
Common terminal at primary side
Feed back terminal
Power supply terminal for internal drive
Drain terminal for built-in FET
D
=0→15V
Shunt regulator
Noise reduction filter
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Photo coupler
Switching transformer
Varistor
Terminal function
3.25MAX.
Vref=2.495V
Use if necessary
0Ω
750kΩ 0.5W / 600V
200kΩ / 3W
51Ω / 0.125W
1kΩ / 0.1W
15kΩ / 0.1W
3kΩ / 0.1W
4.7kΩ / 0.1W
1kΩ / 0.1W
PC817
SRW25ES-47V015(TDK)
A varistor is required to protect against
lightning surges and static electricity.
Dimensions (Unit : mm)
Derating Curve
Conversion Efficiency
Load regulation
(In case of 12V output)
(In case of 12V output)
1
2.54X5=12.7TYP.
Data Sheet
14
12
10
90
80
70
60
50
40
30
20
10
2.54±0.2
8
6
4
2
0
0
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
2
0
0
0
-30
18.8MAX.
MARKING SIDE
2010.01 - Rev.A
3
0.5±0.1
1.3±0.2
-10
200
Ambient Templature Ta /
500
Operation range
Operation range
Output charasteristic
(Vi=311V, Ta=25 ° C)
Conversion efficiency
(Vi=311V, Ta=25 ° C)
10
Output current / mA
Derating curve
Output current / mA
6
400
1000
30
5.55MAX.
600
Tsmax=105
Tsmax=105
50
1500
9.9MAX.
70
800
° C
° C
° C
90
0.25±0.05
4.35MAX.
2000
1000
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bp5728 Summary of contents
Page 1
... ON a current Ioz flows through the transistor. Also, FB current runs to Pin 2 of BP5728 when Vo exceeds the designed voltage and the constant voltage control is executed. 3.In overcurrent conditions : The input current will increase if the output power increases, and the overcurrent protection circuit will turn ON once the Drain current exceeds the specified value (Idocp) ...
Page 2
...
Page 3
...
Page 4
No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose ...