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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: D Built-In 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-On Lag Time Adjustable by External Applications D Short Relay-Off 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-Sensitive 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-Current or by Constant-Voltage 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's Switch has been Off. This Minimizes the Relay-Off Time and thus can Prevent Pop Noise Generated by Mute-Off Time Lag Absolute Maximum Ratings: (TA = +25C unless otherwise specified) Total Power Disipation (TA = +70C), PT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +70C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125C Supply Voltage (Pin1), VCC(max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60V Supply Current (Pin1), I1(max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80mA
Absolute Maximum Ratings (Cont'd): (TA = +25C unless otherwise specified) 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. Electrical Characteristics: (VCC = +45V unless otherwise specified)
Parameter Threshold Voltage at Pin3, Positive Side Symbol +Vth(3) Test Conditions Apply positive voltage to Pin3 through an external resistance (56k). Measure Pin3 voltage while Pin1 voltage changes from low (1V) to high (45V) during the above process. Min 0.89 Typ 1.20 Max 1.61 Unit V
Threshold Voltage at Pin3, Negative Side
-Vth(3)
Apply negative voltage to Pin3 through an ex- -1.86 -1.20 -0.84 ternal resistance (56k). Measure Pin3 voltage while Pin1 voltage changes from low (1V) to high (45V) during the above process. Apply positive voltage to Pin4 through an external resistance (56k). Measure Pin4 voltage while Pin1 voltage changes from low (1V) to high (45V) during the above process. 0.89 1.20 1.61
V
Threshold Voltage at Pin4, Positive Side
+Vth(4)
V
Threshold Voltage at Pin4, Negative Side
-Vth(4)
Apply negative voltage to Pin4 through an ex- -1.86 -1.20 -0.84 ternal resistance (56k). Measure Pin4 voltage while Pin1 voltage changes from low (1V) to high (45V) during the above process. Apply voltage to Pin6 through D1. Measure voltage on Pin6 while Pin1 voltage changes from low (1V) to high (45V) during the above process. 0.90 1.15 1.40
V
Threshold Voltage at Pin6
Vth(6)
V
Threshold AC Voltage at Pin5
VAC(on) Apply AC voltage to Pin5 through D2. Measure AC voltage on Pin5 while Pin1 voltage changes from low (1V) to high (45V) during the above process. Vth(5) Apply voltage to Pin5 directly. Measure voltage on Pin5 when Pin1 voltage change from low (1V) to High (45V) during the above process. Measure Pin7 input current when turning relay on.
-
2.5
-
Vrms
Threshold Voltage at Pin5
-1.8
-1.2
0
V
Current Drain at Pin7
I(7)
16.5
18.5
20.5
mA
Pin Connection Diagram (Front View)
8 Positive Feedback 7 Bias 6 Overload Detector 5 AC Signal Detector 4 Neutral Port Detector 3 Temperature Detector 2 GND 1 Relay DR/VCC
.142 (3.6)
.800 (20.3)
.362 (9.2) 1 8 .100 (2.54)
.100 (2.54)
.020 (0.50) .700 (17.78)

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Price & Availability of NTE1635

Part #	Manufacturer	Description	Price	BuyNow Qty.
NTE1635	NTE Electronics Inc		1: USD8.96	2

Part #	Manufacturer	Description	Price	BuyNow Qty.
NTE1635	NTE Electronics Inc	CONSUMER CIRCUIT	5: USD4.5 2: USD6 1: USD9	4
NTE1635	NTE Electronics Inc	CONSUMER CIRCUIT	2: USD8 1: USD12	1

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