BP5725 Datasheet, PDF (1/3 Pages) Rohm – Isolated AC/DC Converter

Isolated AC/DC Converter
AC 100 to AC230V input, 6W output
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
Dimensions (mm)
22.5MAX.
7.8MAX.
12 3 45 7
P=2.54±0.2
2.54X6=15.24TYP.
5.55MAX.
0.25±0.05
Electrical Characteristics
<In case of 12V output>
Parameter
Symbol
Output detection voltage Vod
Output current
Io
Min.
−7.1
10
Line regulation
Vr
−
Load regulation
VI
−
Output ripple voltage Vp
−
Power conversion
efficiency
η
70
∗1: Pulse noise is not included.
(Unless otherwise noted, Vi=311V, rated load Ta=25°C)
Typ. Max. Unit
Conditions
−7.6 −8.1
V Io=500mA
−
500
mA Refer to derating curve
380
500
mV
Vi=119V to 405VDC
Io=500mA
90
200
mV Io=200mA to 500mA
300
500 mVp-p
∗1
77
−
%
Sample Application Circuit
Be sure to use fuse for safety.
Vin+ ^FUSE
FL1
D3
ZNR
C6
Vi n -
C1
R2
T1
R1
C2
D1
R3
D2
C4
C3
C5
External Component Settings
123 45 7
BP5725
Vo
R4
GND
Pin
No.
Name
Function
1
This is the output
Vod detection terminal.
2
This is the output
Vod _{detection terminal.}
3
Vin(-)
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.
C1: Capacitor for input voltage smoothing
C2: For noise terminal voltage reduction
C3: Capacitor for Vod voltage smoothing
10µF/450V
2200pF/1kV
10µF/50V
Be sure to evaluate it under the condition that it
is mounted by your product. Especially, confirm
whether output power never exceeds a
maximum standard with current probe.
C4: Capacitor for output voltage smoothing 1000µF/25V
C5: For noise terminal voltage reduction 2200pF/AC250V
C6: Noise terminal voltage
countermeasure capacitor
Please set it, if necessary
Limiting element voltage DC630V or higher 0.1 to 0.22µF
D1: Rectifier diode
FRD 800V/0.5A
D2: Rectifier diode
FRD 200V/1A
D3: Diode bridge
800V/1A
R1, R3: Resistor
360kΩ±5% 0.25W
R2: Resistor
200kΩ±5% 1W
R4: Bleeder resistor
In case Io is less than 10mA, connect a bleeder resistance in parallel to C4.
T1: Switching transformer
FL1: For noise terminal voltage reduction Please set it, if necessary
FUSE: Fuse
Be sure to use this for safety.
ZNR: Varistor
Must be use. It protects this part from lightning surge and static electricity.
Precautions on use of products
When the capacity of the output smoothing electrolytic capacitor C1 is made large, output may not rise.
100µF 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. When reducing the resistance value, start-up may fail.
Take note of the loss of the resistor when it is reduced.
This product has built-in over current (reset type) protection function to prevent destruction at abrupt error.
These protection functions are effective for prevention against destruction owing to abrupt accident,
therefore, avoid using them for continuous protection circuit operating, or at transition
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>
(Vin=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>
(Vin=311V, Ta=25°C)
Maximum Io=500mA
200 400 600 800 1000 1200
Output Current Io(mA)