BP5720-5 Datasheet, PDF (1/4 Pages) Rohm – Isolated AC/DC Converter

Data Sheet
100-220VAC Input/5VDC (500mA) Output
Isolated AC/DC Converter
BP5720-5
Absolute Maximum Ratings
Dimensions (Unit : mm)
Parameter
1-pin input voltage
4-pin input voltage
1-pin input current
Maximum power
Withstanding voltage
Allowable maximum
surface temperature
Operating
temperature range
Storage temperature
range
Symbol
VD
VNd
ID
Po
VI
Tcmax
Topr
Tstg
Limits
500
+30 / −5
250
2.5
2.5
105
−25 to +80
−25 to +105
Unit
V
V
mA
W
kVrms
°C
°C
°C
Conditions
Refer to the derating curve
1 sec (primary - secondary : 1 - 6Pin,
9 - 12Pin short)
Ambient temperature + The module
self-heating Tcmax
Electrical Characteristics
Parameter
Symbol Min.
Input voltage
Vi
113
(Unless otherwise noted, Vi=141V, Io=500mA,Ta=25°C) (Vo=5V, R3/R4=open)
Typ.
Max.
Unit
Conditions
141
374
V Io=500mA
Output voltage
Vo
4.75
5.0
5.25
V
Output current
Io
0
−
500
mA
Line regulation
∆Vr
−
10
100
mV Vi=113V to 374V
Load regulation
∆VI
−
15
100
mV Io=0mA to 500mA
Output ripple voltage
∆γ
−
100
250 mVp-p Vi=141V
∗1
Power conversion
efficiency
η
70
78
−
%
∗1: Measured peak-to-peak, ripple current bandwidth (spike noise not included).
Application Circuit
External Component Layout
F1
AC100V to 200V
50Hz/60Hz
ZNR31
L31
C1
D2
C2
R2
R1 C4
D1
C7
C3
D3
C6
GND1
Vo
GND2
Use a fuse for safety
C5
F2
R4 R3
14 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.
Pin
No.
Name
Function
Connect the negative side of
1 Np- the primary coil of the external
transformer.
2 NC NC pin
3
Skip
This is connected to the plus
4 Nd+ side of the base coil wire of
the external transformer.
5 NC NC pin
6
Vi(-)
This is the primary side input
minus terminal.
7
Skip
8
Skip
9
GND1
End of secondary output
smoothing capacitor terminal.
10
GND2
Secondary 5V output
GND terminal.
Secondary output voltage
11
VADJ
fine-tunning terminal.
Resistor has to be inserted
between GND2 or Vo terminals.
This is the secondary side 5V
12
Vo
output voltage control terminal.
Insert the output smoothing
capacitor 470 µF between GND.
35.5MAX.
10.0MAX.
MARKING SIDE
3.3MAX.
12 4 56
9 10 11 12
0.5±0.1
P=2.54±0.2
1.3±0.2
4.4MAX.
2.54X11=27.94 TYP.
0.25±0.05
5.6MAX.
Derating Curve
600
500
400
300
Operation Range
200
100
0
-30-20-10 0 10 20 30 40 50 60 70 80 90
Ambient Temperature Ta(°C)
Conversion Efficiency
<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
Output Current Io(mA)
Load Regulation
<In case of 5V output>
(Vi=311V, Ta=25°C)
7.0
6.0
5.0
4.0
3.0
2.0
1.0
Maximum
Io=500mA
0.0
0 100 200 300 400 500 600 700 800
Output Current Io(mA)
<<Output voltage adjustment>>
External Component Specifications
C1: Output smoothing capacitor
0.1µF/275VAC Safety regulation
R1: Resistor
100kΩ±5% 2W 300V or higher
Adjust the output voltage by varying
R3 and R4.
C2: Noise reduction capacitor
C3: Output smoothing capacitor
C4: Input smoothing capacitor
0.1µF/275VAC Safety regulation
22µF/450V
Limits ripple current 100mArms or higher
2200pF/400V or higher
R2: Noise reduction resistor 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.
(1)Output voltage range:
4.0 to 6.0V
(2)Output voltage equations
C5: Noise reduction capacitor
2200pF Safety regulation
Refer to the output voltage adjustment notes at right
Vo<5V, R3=(30.33Vo−37.2) / (5−Vo)kΩ
C6: Output smoothing capacitor
470µF/10V Low impedance part
L31: Line filter
10mH 0.2Arms or higher Safety regulation
R4=open
C7: Noise reduction capacitor
630V or higher 0.1 to 0.22µF
T1: Switching transformer
Ensure that it complies with safety regulations
Vo=5V, R3, R4=open
D1: Noise reduction diode
Use if necessary
800V/0.5A
F1: Fuse
F2: Fuse
Be sure to use this for safety.
Be sure to use this for safety.
Vo>5V, R3=open
R4=37.6092/ (Vo-5)kΩ
D2: Diode bridge
800V/1A
ZNR31: Varistor
A varistor is required to protect against
D3: Rectifier diode
60V/2A
lightning surges and static electricity.
390V Safety regulation
Example) In case of Vo=5.3V
Operation Notes
Vo>5V , R4=37.6092 / (5.3-5 )kΩ
=125.364kΩ
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.
Thus, R3=open
R4=120kΩ (Vo=5.313V)
DC coltage after sousing
Overcurrent (reset type) protection circuit is built in, preventing damage from occurring due to unexpected conditions
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