ROHM BP5722A12_10

Data Sheet
220VAC Input/12VDC (1A) Output
Isolated AC/DC Converter
BP5722A12
Absolute Maximum Ratings
Dimensions (Unit : mm)
Unit
V
V
mA
mA
W
kW
105
°C
Topr
−25 to +80
°C
Tstg
−40 to +105
°C
1 sec (between primary and secondary)
Ambient temperature + module
Tcmax
self-heating
Line regulation
Load regulation
Output ripple voltage
Power conversion
efficiency
1 2
6 7 8 9
P=2.54±0.2
11
0.5±0.1
1.3±0.2
3.3 MAX.
0.25±0.05
5.6 MAX.
2.54 x 10 =25.4
3.7 MAX.
Derating Curve
Electrical Characteristics
Parameter
Symbol
Pin 11 input voltage
VD
Operating power
V
DD
voltage(Pin 7)
Rated output voltage
Vo
Rated output current
Io
9.3 MAX.
32.5 MAX.
12
Output Power (W)
Tcmax
Conditions
21.5 MAX.
Limits
800
25
350
10
13
2.5
4.0±1.0
Symbol
VD
VDD
ID
IDD
Po
VI
Mark side
Parameter
Pin 11 input voltage
Pin 7,8 input voltage
Pin 11 input Current
Pin 8 input Current
Output power
Withstand voltage
Maximum allowable
surface temperature
Operating
temperature range
Storage temperature
range
Min.
−
Typ.
−
Max.
700
Unit
V
Conditions
Io=1000mA
8.8
11.4
0
12
12.0
−
20
12.6
1000
V
V
mA
DC, Io=1000mA *1
∆Vr
∆VI
∆γ
−
−
−
8
30
200
200
200
500
mV
mV
mVpp
η
75
83
−
%
Refer to derating curve
Vi=217 to 405V DC
Io=1000mA
Io=50 to 1000mA
*2
6
Operation Range
-30-20-10 0 10 20 30 40 50 60 70 80 90
Ambient Temperature Ta (°C)
Switching Frequency
*1: The operation starting voltage is between 15.5 and 17.5 V.
*2: Pulse noise is not included.
Pin
No.
1
0
C4
C7
R2
4
6
7
+
F1
C3
5
Vo1:12V/850mA
+
9
C2
C1
GND1
Vo2:18V/100mA
D5
+
3
D2 1
D3
R1
D7
+
AC220V
ZNR
D1
T1
Vi(+) R5
C6
GND2
Vi(-)
C5
Use a fuse for safety
8
7
11
2
1
BP5722A12
Terminal
name
1
Vo
2
GND
6
Vi(-)
7
VDD
8
Vs
9
NC
11
VD
Terminal function
Secondary 12V output
voltage control terminal.
Insert a 1000µF output
smoothing capacitor before the
GND for use.
Secondary 12V output GND
terminal.
Primary input negative
terminal.
Internal circuit power terminal.
Start-up terminal. Connect to
Vi (+) through an external
resistor (1.5MΩ).
NC pin.
Drain terminal for the built-in
FET.
Verify proper operation under actual conditions
before use. In particular, confirm that the load
current does not exceed the maximum rating.
6
External Component Settings
* C1: Output smoothing capacitor
C2: Noise reduction capacitor
* C3: Output smoothing capacitor
C4: Input smoothing capacitor
C5: Noise reduction capacitor
C6: Output smoothing capacitor
C7: Noise reduction capacitor
D1: Rectifier Diode
D2: Rectifier Diode
Conversion Efficiency
Conversion Efficiency η (%)
Sample Application Circuit
100
90
80
70
60
50
40
30
20
10
0
0
500
1000
Output Current of Vo12 (mA)
1000µF/35V Low-impedance
type
4700pF/400V or higher
10µF/50V Low-impedance
type
33µF/450V
Use if necessary
100µF/35V Low-impedance
type
Use if necessary
Limiting element voltage DC 630V
or higher 0.1 to 0.22µF
90V/6A
1kV/1A
D3:
D5:
D7:
R1:
Rectifier Diode
Rectifier Diode
Diode Bridge
Resistor
* R2: Resistor
R5: Noise reduction resistor
T1: Switching Transformer
F1: Fuse
ZNR: Varistor
90V/0.13A
100V or higher /1A
800V/1A
100kΩ±5%, 3W
Limiting element voltage 300V or higher
1.53MΩ±5%, 0.25W
Limiting element voltage 600V or higher
Use if necessary
1W or higher 10 to 22Ω
Load Regulation
Maximum
Io=1000mA
Be sure to use this for safety.
A varistor is required to protect against
lightning surges and static electricity.
*C1, C3, R2:Refer to directions
Operation Notes
An excessively large capacitance at C1 may cause the output to become inactive. Therefore, a capacitance between 1000 and 2200µF is recommended, with a rise time of 10ms or less.
The capacitance of C3 should be 10µF, since an excessively small value will result in malfunction. The activation time is defined as: t(sec)=R2�C3�ln[1-17/(VI-30µA�R2)], where VI
is the DC voltage after smoothing.
The resistance of R2 should be 1.5MΩ, since an excessively small value will result in malfunction.
Overcurrent (reset type) and overvoltage (latch type) protection circuits are built in, preventing damage from occurring due to unexpected conditions. The overvoltage protection
circuit shuts down operation once VDD exceeds 20V. In order to reset the input capacitor C4 must be discharged and the power turned back on.
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R1010A