NTE1635 IC Speaker Protector Voltage Temperature Overload

Formerly: ECG1635

NTE1635
Integrated Circuit Speaker Protector/Voltage/Temperature/Overload

Description:
The NTE1635 is a monolithic integrated circuit in an 8-Lead SIP type package designed for use in protecting power amplifiers and speakers in various amplifier and receiver applications.

Features:
- Built-In Relay Driver
- Single Power Source
- Wide Operating Supply Range: 25V to 60V
- Plus and Minus Voltage using One Pin (Both Pin3 and Pin4 Posses the Same Functions and Detect Plus and Minus Voltage)
- AC Voltage Detector (Pin5)
- Circuit Protection by Plus Voltage Detection is Provided by Connecting D1 Diode Externally (Pin6)
- Relay-On Lag Time Adjustable by External Applications
- Short Relay-Off Time (25ms Typ Under the Standard External Applications)

Typical Applications:
- For Speaker Protection, use Pin3 (or Pin4) to Detect Setoff of Quiescent Output DC Voltage and to Turn the Relay Off
- For Power Amplifier Protection, use Pin3 (or Pin4) with an External Thermo-Sensitive Device to Detect the Temperature Increase and to Turn the Relay Off
- Power Amplifier can be Protected by Detecting Overload and Turning the Relay Off with Pin6
- In case of Overload Detection by Constant-Current or by Constant-Voltage Drive using an External Diode D1, the Latch Mechanism keeps the Relay On until the Power is Switched Off
- For Prevention of Pop Noise at Power Off use Pin5. AC Voltage Disappeance is Immediately Detected when the Amp´s Switch has been Off. This Minimizes the Relay-Off Time and thus can Prevent Pop Noise Generated by Mute-Off Time Lag

Info as pdf-file
NTE-ECG replacement list as pdf-file
NTE-ECG diagrams

Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Total Power Disipation (TA = +70°C), PT...........................................400mW
Operating Temperature Range, Topr.........................................-20° to +70°C
Storage Temperature Range, Tstg.......................................... -55° to +125°C
Supply Voltage (Pin1), VCC(max)...................................................... 60V
Supply Current (Pin1), I1(max)...................................................... 80mA
Supply Current (Pin3, Note 1), I3(max)...............................................±3mA
Supply Current (Pin4, Note 1), I4(max)...............................................±3mA
Supply Voltage (Pin5), V5(max)...................................................... -10V
Supply Current (Pin6), I6(max).......................................................3mA
Supply Voltage (Pin7, Note 2), V7(max).................................................8V
Supply Current (Pin7, Note 2), I7(max)...............................................25mA
Supply Voltage (Pin8), V8(max).............................................Less than Pin7
Supply Current (Peak, Pin8), I8(max)................................................ 50mA

Note 1. Positive current denotes input current at Pin3 and Pin4, Negative current denotes output current
Note 2. V7(max) = 8V is derived when driven by a constant voltage source without any resistance. When applying current to V7 throught a resistance VCC the maximum value of input current to Pin7 should be used instead of the above values.


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