BP5722A12_10 Datasheet, PDF (1/4 Pages) Rohm – Isolated AC/DC Converter

Data Sheet
220VAC Input/12VDC (1A) Output
Isolated AC/DC Converter
BP5722A12
Absolute Maximum Ratings
Dimensions (Unit : mm)
Parameter
Symbol
Limits
Unit
Pin 11 input voltage
VD
800
V
Conditions
32.5 MAX.
9.3 MAX.
Pin 7,8 input voltage
VDD
25
V
Pin 11 input Current
ID
350
mA
Pin 8 input Current
IDD
10
mA
Output power
Po
13
Withstand voltage
VI
2.5
Maximum allowable
surface temperature
Tcmax
105
W
kW
1 sec (between primary and secondary)
12
6 7 8 9 11
P=2.54±0.2
0.5±0.1
0.25±0.05
°C
Ambient temperature + module
self-heating Tcmax
3.3 MAX.
2.54 x 10 =25.4
1.3±0.2 5.6 MAX.
3.7 MAX.
Operating
temperature range
Topr −25 to +80
°C
Storage temperature
range
Tstg −40 to +105
°C
Derating Curve
Electrical Characteristics
Parameter
Symbol Min.
Typ.
Pin 11 input voltage VD
−
−
Operating power
voltage(Pin 7)
VDD
8.8
12
Rated output voltage Vo
Rated output current Io
11.4 12.0
0
−
Line regulation
∆ Vr
−
8
Load regulation
∆ VI
−
30
Output ripple voltage ∆γ
−
200
Power conversion
efficiency
η
75
83
*1: The operation starting voltage is between 15.5 and 17.5 V.
*2: Pulse noise is not included.
Max.
700
20
12.6
1000
200
200
500
−
Unit
V
V
V
mA
mV
mV
mVpp
%
Conditions
Io=1000mA
DC, Io=1000mA *1
Refer to derating curve
Vi=217 to 405V DC
Io=1000mA
Io=50 to 1000mA
*2
12
6
Operation Range
-30-20-10 0 10 20 30 40 50 60 70 80 90
Ambient Temperature Ta (°C)
Switching Frequency
Sample Application Circuit
AC220V
ZNR
F1
Vi(+) R5
D7
C4 C7 R2
Vi(-)
Use a fuse for safety
87
T1 D1
39
R1
C2
C1
D2 1
D3
1
0 _D5
C3 ⁴
6
C6
57
C5
11
BP5722A12
6
External Component Settings
* C1: Output smoothing capacitor
C2: Noise reduction capacitor
* C3: Output smoothing capacitor
C4: Input smoothing capacitor
1000µF/35V Low-impedance
type
4700pF/400V or higher
10µF/50V Low-impedance
type
33µF/450V
C5: Noise reduction capacitor
C6: Output smoothing capacitor
C7: Noise reduction capacitor
D1: Rectifier Diode
D2: Rectifier Diode
*C1, C3, R2:Refer to directions
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
21
Vo1:12V/850mA
GND1
Vo2:18V/100mA
GND2
Pin Terminal
No. name
Terminal function
Secondary 12V output
voltage control terminal.
1
Vo Insert a 1000µF output
smoothing capacitor before the
GND for use.
2
GND
Secondary 12V output GND
terminal.
6
Vi(-)
Primary input negative
terminal.
7
VDD Internal circuit power terminal.
Start-up terminal. Connect to
8
Vs Vi (+) through an external
resistor (1.5MΩ).
9
NC NC pin.
11
VD
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.
D3: Rectifier Diode
D5: Rectifier Diode
D7: Diode Bridge
R1: 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
Be sure to use this for safety.
A varistor is required to protect against
lightning surges and static electricity.
Conversion Efficiency
100
90
80
70
60
50
40
30
20
10
0
0
500
1000
Output Current of Vo12 (mA)
Load Regulation
Maximum
Io=1000mA
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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2010.01 - Rev.A