NTE1635
Integrated Circuit
Speaker Protector/Voltage/Temperature/Overload
Description:
The NTE1635 is a monolithic integrated circuit in an 8鈥揕ead SIP type package designed for use in
protecting power amplifiers and speakers in various amplifier and receiver applications.
Features:
D
Built鈥揑n Relay Driver
D
Single Power Source
D
Wide Operating Supply Range: 25V to 60V
D
Plus and Minus Voltage using One Pin (Both Pin3 and Pin4 Posses the Same Functions and
Detect Plus and Minus Voltage)
D
AC Voltage Detector (Pin5)
D
Circuit Protection by Plus Voltage Detection is Provided by Connecting D1 Diode Externally (Pin6)
D
Relay鈥揙n Lag Time Adjustable by External Applications
D
Short Relay鈥揙ff Time (25ms Typ Under the Standard External Applications)
Typical Applications:
D
For Speaker Protection, use Pin3 (or Pin4) to Detect Setoff of Quiescent Output DC Voltage
and to Turn the Relay Off
D
For Power Amplifier Protection, use Pin3 (or Pin4) with an External Thermo鈥揝ensitive Device
to Detect the Temperature Increase and to Turn the Relay Off
D
Power Amplifier can be Protected by Detecting Overload and Turning the Relay Off with Pin6
D
In case of Overload Detection by Constant鈥揅urrent or by Constant鈥揤oltage Drive using an
External Diode D1, the Latch Mechanism keeps the Relay On until the Power is Switched Off
D
For Prevention of Pop Noise at Power Off use Pin5. AC Voltage Disappeance is Immediately
Detected when the Amp鈥檚 Switch has been Off. This Minimizes the Relay鈥揙ff Time and thus
can Prevent Pop Noise Generated by Mute鈥揙ff Time Lag
Absolute Maximum Ratings:
(T
A
= +25擄C unless otherwise specified)
Total Power Disipation (T
A
= +70擄C), P
T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mW
Operating Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?0擄 to +70擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +125擄C
Supply Voltage (Pin1), V
CC(max)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60V
Supply Current (Pin1), I
1(max)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80mA
1
2
3
