HCPL-073A View Datasheet(PDF) - Avago Technologies
Part Name
Description
MFG CO.
'HCPL-073A' PDF : 17 Pages View PDF
2-WIRE
ISDN
LINE
PROTECTION
CIRCUIT
TELEPHONE LINE
ISOLATION BARRIER
RECEIVE
TRANSMIT
HCPL-4731
PRIMARY–SECONDARY
POWER ISOLATION
BARRIER
VAC
PRIMARY
P0WER
SUPPLY
EMERGENCY
POWER
SECONDARY
POWER
HCPL-4701
SWITCHED–
MODE
POWER
SUPPLY
LINE POLARITY
LINE PRESENCE
TELEPHONE
LINE
INTERFACE
CIRCUIT
SECONDARY/
EMERGENCY
POWER
VCC
VCC – RETURN
NOTE: THE CIRCUITS SHOWN IN THIS FIGURE REPRESENT POSSIBLE, FUNCTIONAL APPLICATION OF THE HCPL-47XX
OPTOCOUPLER TO AN ISDN LINE INTERFACE. THIS CIRCUIT ARRANGEMENT DOES NOT GUARANTEE COMPLIANCE,
CONFORMITY, OR ACCEPTANCE TO AN ISDN, OR OTHER TELECOMMUNICATION STANDARD, OR TO FCC OR TO OTHER
GOVERNMENTAL REGULATORY AGENCY REQUIREMENTS. THESE CIRCUITS ARE RECOMMENDATIONS THAT MAY MEET
THE NEEDS OF THESE APPLICATIONS. Agilent DOES NOT IMPLY, REPRESENT, NOR GUARANTEE THAT
THESE CIRCUIT ARRANGEMENTS ARE FREE FROM PATENT INFRINGEMENT.
Figure 10. HCPL-47XX Isolated Monitoring Circuits for 2-Wire ISDN Telephone Line.
EMI FILTER
115/230
AND
VAC
CURRENT
LIMITER
ISOLATION
BARRIER
SWITCHING
ELEMENT
1
RECTIFIER
AND
FILTER
VO
GND 2
2
CONTROL
CIRCUIT
POWER
SUPPLY
FILTER
CAPACITOR 1
1
ERROR
FEEDBACK
VIA CNR200
HCPL-4701
2
SOFT START
COMMAND
INTERRUPT FLAG
POWER DOWN
Figure 11. Typical Optical Isolation Used for Power-Loss Indication and Regulation Signal Feedback.
RECOMMENDED VCC FILTER
1
8
100 Ω
VCC
2
7
+
0.1 µF 10 µF
RL
3
6
VO
4
5
HCPL-4701 OR HCPL-4731
Figure 12. Recommended Power Supply Filter for HCPL-47XX Optocouplers.
15
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