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BD7F100EFJ-LB PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD7F100EFJ-LB
기능 Optocoupler-less Isolated Flyback Converter
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BD7F100EFJ-LB 데이터시트, 핀배열, 회로
Datasheet
Optocoupler-less
Isolated Flyback Converter
BD7F100HFN-LB BD7F100EFJ-LB
General Description
This product guarantees long time supply availability in
the industrial instrumentation market.
BD7F100 is an optocoupler-less Isolated Flyback
Converter. An optocoupler or the tertiary winding
feedback circuit which was needed to obtain a stable
output voltage isolated by a transformer in the
conventional application becomes unnecessary, thus,
the number of parts is reduced drastically, producing a
small-sized and high-reliability application isolated type
power supply.
Furthermore, a highly by the use of the Original
Adapted-Type ON-Time Control Technology, it makes
the external phase compensation parts become
unnecessary, therefore a highly efficient isolated type
power supply application can easily be produced.
Key Specifications
Supply Voltage of Operation:
SW Terminal Operating Voltage:
Over Current Limit:
Switching Frequency:
Reference Voltage Accuracy:
Quiescent Current:
Operating Current:
Junction Temperature of Operation:
3V to 40V
50V (Max)
1.25A (Typ)
400kHz (Typ)
±1.5%
0µA (Typ)
2mA (Typ)
-40°C to +125°C
Packages
HSON8
HTSOP-J8
W(Typ) D(Typ) H(Max)
2.90mm x 3.00mm x 0.60mm
4.90mm x 6.00mm x 1.00mm
Features
Guaranteed long time supply availability for
Industrial Applications.
No need for an optocoupler or a transformer tertiary
winding.
The output voltage can be set by two external
resistors and the transformer turns ratio.
Uses Original Adapted Type ON-Time Control
Technology.
High-speed load response is realized and external
phase compensation parts are unnecessary.
Fixed switching frequency and low output ripple
Highly efficient light load mode available (PFM
operation)
Shutdown / Enable Control
Built-in N-Channel MOSFET
Soft start function
Output load compensation function
Protection functions:
VIN Under Voltage Lock-Out (VIN UVLO)
Over Current Protection (OCP)
Thermal Shutdown Protection (TSD)
HSON8
HTSOP-J8
Application
Industrial equipment Isolated Power Supply
O Product structure : silicon monolithic integrated circuit
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
O This product has no designed protection against radioactive rays
1/28
TSZ02201-0J1J0AJ00910-1-2
29.Jun.2016 Rev.002




BD7F100EFJ-LB pdf, 반도체, 판매, 대치품
BD7F100HFN-LB BD7F100EFJ-LB
Description of Blocks - continued
7. LOAD COMPENSATION
This is the block which compensates the output voltage regulation by VF characteristic fluctuation of the secondary side
output diode according to the load current.
The current which flows into the built-in N-Channel MOSFET is monitored, and the current according to the compensation
quantity and the time constant which are determined by the external resistor and the capacitor of the COMP terminal is
drawn from the REF terminal. The output voltage rises and is rectified when feedback current which flows into the external
resistor of the REF terminal decreases and the REF terminal voltage falls.
8. TSD
This is the temperature protection block.
If the chip’s junction temperature, Tj, inside the IC is above 175°C (Typ), it will be detected and this block will be in the
protection state and the SW terminal becomes Hi-Z.
If Tj falls to below 150°C (Typ), it will return automatically through soft start.
9. OCP
This is the over-current protection block.
If the peak current during the ON-Time of the built-in N-Channel MOSFET reaches 1.25A (Typ), it will be detected and the
N-Channel MOSFET is turned OFF.
If output voltage goes to 50% or less of the setting voltage, the peak detection current of OCP will be controlled by 0.625A
(Typ).The min off time is 1.5μs (Typ) when the OCP is operated under the condition where the output voltage is 50% of
the set voltage.
Absolute Maximum Ratings (Ta = 25 °C)
Parameter
Symbol
Rating
BD7F100HFN-LB BD7F100EFJ-LB
Unit
VIN Input Power Voltage (Note 1)
VIN
45
V
SW Terminal Voltage
VSW
60
V
SDX/EN Terminal Voltage
VSDX/EN
VIN
V
FB Terminal Voltage
VFB VIN-0.3V to VIN
V
REF Terminal Voltage
VREF
7
V
COMP Terminal Voltage
VCOMP
7
V
Power Dissipation
Pd
1.75 (Note 2)
3.75 (Note 3)
W
Storage Temperature Range
Tstg
-55 to +150
°C
Maximum Junction Temperature
Tjmax
150
°C
(Note 1) Not to exceed Power Dissipation (Pd).
(Note 2) Reduced by 14.0mW/°C for temperatures above 25°C (when mounted on a one-layer glass-epoxy board with 70mm × 70mm × 1.6mm dimension,
65% copper foil density)
(Note 3) Reduced by 30.0mW/°C for temperatures above 25°C (when mounted on four-layer glass-epoxy board with 70mm × 70mm × 1.6mm dimension.)
Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated
over the absolute maximum ratings.
Recommended Operating Conditions
Parameter
Symbol
Min
VIN Input Power Voltage
VIN 3
SW Terminal Voltage
VSW
-
Junction Temperature (Note4)
Tj -40
(Note 4) Life time is derated at junction temperature greater than 125°C.
Limit
Typ
24
-
-
Max
40
50
+125
Unit
V
V
°C
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
4/28
TSZ02201-0J1J0AJ00910-1-2
29.Jun.2016 Rev.002

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BD7F100EFJ-LB 전자부품, 판매, 대치품
BD7F100HFN-LB BD7F100EFJ-LB
Typical Performance Curves
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
SDX/EN=0V
10 20
VIN Voltage [V]
30
40
Figure 2. Quiescent Current vs VIN Voltage
2.5
2
1.5
1
REF=2V
COMP=0V
0.5
0
0 10 20 30 40
VIN Voltage [V]
Figure 3. Operating Current vs VIN Voltage
40
35
30
25
20
15
10
5
0
0
5 10 15 20 25 30 35 40
SDX/EN Voltage [V]
Figure 4. SDX/EN Input Current vs SDX/EN Voltage
500
450
400
350
300
250
200
150
100
50
0
20 25 30 35 40 45 50
Duty [%]
Figure 5. Switching Frequency vs Duty
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
7/28
TSZ02201-0J1J0AJ00910-1-2
29.Jun.2016 Rev.002

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BD7F100EFJ-LB

Optocoupler-less Isolated Flyback Converter

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