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AD260BND-1 データシート(PDF) 7 Page - Analog Devices

部品番号 AD260BND-1
部品情報  High Speed, Logic Isolator with Power Transformer
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
Logo AD - Analog Devices

AD260BND-1 データシート(HTML) 7 Page - Analog Devices

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AD260
–7–
REV. 0
The power transformer is designed to operate between 150 kHz
and 250 kHz and will easily deliver more than 1 W of isolated
power when driven push-pull (5 V) on the system side. Different
transformer tap, rectifier and regulator schemes will provide
combinations of
±5 V, 15 V, 24 V or even 30 V or higher.
The output voltage when driven with a low voltage-drop drive
(@ 5 V push-pull) will be 37 V p-p across the entire secondary.
This will drop to 33 V p-p at 4.5 V drive.
3.3 F
TANT.
+
52T
CT
LM2524
12
11
14
13
COMP VIN VREF
4.7k
915
16
3.3k
0.1 F
10
1
2
4
5
6
7
470pF
GND
INV
NI
CL+
CT
RT
CL
LOGIC/SHUTDOWN (HI)
+5Vdc
8
3.3 F
TANT.
+
52T
CT
MAX
253
1
8
4
3
G2
FS
SHUTDOWN (
ON/OFF)
+5Vdc
7
G1
2
6
D1
D2
SD
Figure 3. System Side Transformer Driver Examples
Application Examples
The following is an example of a typical transformer system-side
drive circuit and a field-side regulation circuit suitable for use in
most general applications.
+5V
REG
96T
CT.
–5V ISO
+5V ISO
I
VDD FLD
ENABLE FLD
(PWR-UP ENABLE)
–5V
REG
Figure 4.
a
a
+5Vdc/+4.5Vdc
150mA
+
LOAD
COM
80mA
b
COM
20mA
b
+
20mA
b
+5Vdc/+4.5Vdc
150mA
COM
20mA
b
+
20mA
a
+5Vdc/+4.5Vdc
150mA
COM
40mA
a
+
40mA
a
a
7.72
7.62
15.79
23.5
7.72
a
+5Vdc/+4.5Vdc
150mA
COM
20mA
b
+
20mA
b
+
VOUT @
5V DRIVE
V(MIN) @
4.5V DRIVE
+8.55
17.63
8.64
+26.3
+8.64
"a" DIODES
IN5818/MBR0530
"b" DIODES
IN5819/MBR0540
Figure 5. Field Side Power Supply Rectifier Examples


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