Data Sheet
100-220VAC Input/5VDC (500mA) Output
Isolated AC/DC Converter
BP5720-5
Absolute Maximum Ratings
20.5MAX.
Dimensions (Unit : mm)
Unit
V
V
Conditions
35.5MAX.
10.0MAX.
1-pin input current
Maximum power
Withstanding voltage
Allowable maximum
surface temperature
Operating
temperature range
Storage temperature
range
I
D
Po
VI
Tcmax
Topr
Tstg
250
2.5
2.5
105
−25
to +80
−25
to +105
mA
W
kVrms
°C
°C
°C
MARKING SIDE
Refer to the derating curve
1 sec (primary - secondary : 1 - 6Pin,
9 - 12Pin short)
Ambient temperature + The module
self-heating
Tcmax
4.0±1.0
1 2
4 5 6
P=2.54±0.2
2.54X11=27.94 TYP.
3.3MAX.
9 10 11 12
0.5±0.1
1.3±0.2
4.4MAX.
MARKING SIDE
Parameter
1-pin input voltage
4-pin input voltage
Symbol
V
D
VNd
Limits
500
+30
/
−5
0.25±0.05
5.6MAX.
Derating Curve
Output Current (mA)
600
500
400
300
200
100
0
-30-20-10 0 10 20 30 40 50 60 70 80 90
Ambient Temperature Ta(°C)
Operation Range
Electrical Characteristics
Parameter
Input voltage
Output voltage
Output current
Line regulation
Load regulation
Output ripple voltage
Power conversion
efficiency
Symbol
Vi
Vo
Io
∆Vr
∆VI
∆γ
η
Min.
113
4.75
0
−
−
−
70
(Unless otherwise noted, Vi=141V, Io=500mA,Ta=25°C) (Vo=5V, R3/R4=open)
Typ.
141
5.0
−
10
15
100
78
Max.
374
5.25
500
100
100
250
−
Unit
V
V
mA
mV
mV
mVp-p
%
Conditions
Io=500mA
Vi=113V to 374V
Io=0mA to 500mA
Vi=141V
∗
1
Conversion Efficiency
Conversion Efficiency
η
(%)
<In case of 5V output>
(Vi=311V, Ta=25°C)
100
80
60
40
20
0
0
50 100 150 100 250 300 350 400 450 500
∗1:
Measured peak-to-peak, ripple current bandwidth (spike noise not included).
Application Circuit
External Component Layout
F1
L31
ZNR31
C1
C2
D2
R2
C7
+
GND1
C3
C5
F2
Use a fuse for safety
R4 R3
D3
Vo
+
AC100V to 200V
50Hz/60Hz
Pin
No. Name
1
2
3
4
Np-
NC
Function
Connect the negative side of
the primary coil of the external
transformer.
Output Current Io(mA)
R1
C4
D1
C6
GND2
5
6
7
8
9
10
11
1
4
6
9
10
11
12
BP5720-5
Please verify operation and characteristics in the customer's circuit before actual usage.
Ensure that the load current does not exceed the maximum rating.
12
NC pin
Skip
This is connected to the plus
Nd+ side of the base coil wire of
the external transformer.
NC NC pin
Vi(-) This is the primary side input
minus terminal.
Skip
Skip
GND1 End of secondary output
smoothing capacitor terminal.
GND2 Secondary 5V output
GND terminal.
Secondary output voltage
VADJ fine-tunning terminal.
Resistor has to be inserted
between GND2 or Vo terminals.
This is the secondary side 5V
Vo output voltage control terminal.
Insert the output smoothing
capacitor 470
µF
between GND.
Load Regulation
<In case of 5V output>
(Vi=311V, Ta=25°C)
Output Voltage Vo(V)
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Maximum
Io=500mA
0
100 200 300 400 500 600 700 800
Output Current Io(mA)
<<Output voltage adjustment>>
Adjust the output voltage by varying
R3 and R4.
External Component Specifications
C1: Output smoothing capacitor
C2: Noise reduction capacitor
C3: Output smoothing capacitor
C4:
C5:
C6:
C7:
Input smoothing capacitor
Noise reduction capacitor
Output smoothing capacitor
Noise reduction capacitor
0.1µF/275VAC Safety regulation
0.1µF/275VAC Safety regulation
22µF/450V
Limits ripple current 100mArms or higher
2200pF/400V or higher
2200pF Safety regulation
470µF/10V Low impedance part
630V or higher 0.1 to 0.22µF
Use if necessary
800V/0.5A
800V/1A
60V/2A
100kΩ±5% 2W 300V or higher
1W or higher 10 to 22Ω
Use if necessary
R3,4: Output voltage adjustment resistor By changing R3, R4, it is possible to adjust
output voltage.
Refer to the output voltage adjustment notes at right
L31: Line filter
10mH 0.2Arms or higher Safety regulation
T1: Switching transformer
Ensure that it complies with safety regulations
F1: Fuse
Be sure to use this for safety.
F2: Fuse
Be sure to use this for safety.
ZNR31: Varistor
A varistor is required to protect against
lightning surges and static electricity.
390V Safety regulation
R1:
R2:
Resistor
Noise reduction resistor
(1)Output voltage range:
4.0 to 6.0V
(2)Output voltage equations
Vo<5V, R3=(30.33Vo−37.2) / (5−Vo)kΩ
R4=open
Vo=5V, R3, R4=open
Vo>5V, R3=open
R4=37.6092/ (Vo-5)kΩ
D1: Noise reduction diode
D2: Diode bridge
D3: Rectifier diode
Operation Notes
An excessively large capacitance at C4 may cause the output to become inactive.
Therefore, a capacitance between 470µF to 2200µF is recommended, with a risetime of 10ms or less.
DC coltage after sousing
Overcurrent (reset type) protection circuit is built in, preventing damage from occurring due to unexpected conditions
Example) In case of Vo=5.3V
Vo>5V , R4=37.6092 / (5.3-5 )kΩ
=125.364kΩ
Thus, R3=open
R4=120kΩ (Vo=5.313V)
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