BP5725_10 Datasheet, PDF (1/4 Pages) Rohm – Isolated AC/DC Converter

Data Sheet
100-230VAC Input/6W Output
Isolated AC/DC Converter
BP5725
Absolute Maximum Ratings
Parameter
7-pin input voltage
4-pin input voltage
7-pin input Current
Maximum power
Allowable maximum
surface temperature
Operating
temperature range
Storage temperature
range
Symbol
VD
VG
ID
Po
Tcmax
Limits
800
45
400
6
105
Topr −25 to +80
Tstg −25 to +105
Unit
V
Vpeak
mA
W
°C
°C
°C
Conditions
Ambient temperature + module
self-heating Tcmax
Electrical Characteristics
<In case of 12V output> (Unless otherwise noted, Vi=311V, rated load Ta=25°C)
Parameter
Symbol Min.
Typ.
Max. Unit
Conditions
Output detection voltage Vod
−7.1
−7.6
−8.1
V Io=500mA
Output current
Io
10
−
500
mA Refer to derating curve
Line regulation
Vr
Load regulation
VI
Output ripple voltage Vp
Power conversion
efficiency
η
−
380
500
mV
Vi=119V to 405VDC
Io=500mA
−
90
200
mV Io=200mA to 500mA
−
300
500 mVp-p
∗1
70
77
−
%
∗1: Pulse noise is not included.
Sample Application Circuit
Vi+ ^FUSE
ZNR
Be sure to use fuse for safety.
FL1
D3
C6
Vi -
C1
External Component Specifications
C1: Input smoothing capacitor
C2: Noise reduction capacitor
C3: Vod smoothing capacitor
C4: Output smoothing capacitor
C5: Noise reduction capacitor
C6: Noise reduction capacitor
D1: Rectifier diode
D2: Rectifier diode
D3: Diode bridge
R1, R3: Resistor
R2: Resistor
R4: Bleeder resistor
T1: Switching transformer
FL1: Noise reduction filter
FUSE: Fuse
ZNR: Varistor
Pin
No.
Name
Function
R2
R1 _D1
R3
T1
C2
D2
C4
C3
C5
123 45 7
10µF/450V
2200pF/1kV
10µF/50V
1000µF/25V
Vo
R4
GND
1
This is the output
Vod detection terminal.
2
This is the output
Vod _{detection terminal.}
3
Vi(-)
This is the primary side
input minus terminal.
4
VG
MOSFET, GATE driving
input terminal.
This is the start terminal.
5
Vs Connect this via the external
resistor (720kΩ) to Vi (+).
6
NC This is the NC pin.
This is the built-in FET of
drain terminal. The primary
7
VD
coil minus side of the external
transformer, and the snubber
circuit for noise reduction are
connected to this.
Please verify operation and characteristics in
the customer's circuit before actual usage.
Ensure that the load current does not exceed
the maximum rating.
2200pF/AC250V
Use if necessary
Limiting element voltage DC630V or higher, 0.1 to 0.22µF
FRD 800V/0.5A
FRD 200V/1A
800V/1A
360kΩ±5% 0.25W
200kΩ±5% 1W
In case Io is less than 10mA, connect a bleeder resistor in parallel to C4.
Use if necessary
Be sure to use this for safety.
A varistor is required to protect against lightning surges and static electricity.
Usage Precautions
When the capacitance of the output smoothing electrolytic capacitor C4 is made large the output may not rise.
100 to 2200µF is recommended. Set the rise time within 10ms.
Set the Vod electrolytic capacitor C3 to 10µF.
Be sure to use the VG terminal voltage within the operating voltage range.
Set the external starting resistor (R1+R3) to 720KΩ. Reducing the resistance value may cause failure during startup.
A built-in overcurrent protection circuit (reset type) prevents damage due to surge currents. Please discontinue
operation if protection circuit is continuously active.
Dimensions (Unit : mm)
22.5MAX.
7.8MAX.
12 3 45 7
P=2.54±0.2
2.54X6=15.24TYP.
5.55MAX.
0.25±0.05
Derating Curve
7
6
5
4
3
Operation Range
2
1
0
-30-20-10 0 10 20 30 40 50 60 70 80 90
Ambient Temperature Ta(°C)
Conversion Efficiency
<In case of 12V 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
18.0
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
0
<In case of 12V output>
(Vi=311V, Ta=25°C)
Maximum Io=500mA
200 400 600 800 1000 1200
Output Current Io(mA)
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2010.01 - Rev.A