7100

NTE7100
Integrated Circuit
Protector IC for Stereo Power Amplifier
Description:
The NTE7100 is a monolithic integrated circuit in an 8–Lead SIP type package designed for protecting
stereo power amplifiers and loudspeakers.
Features:
D Work Stably Within a Wide Power Supply Range: VCC = 25V to 60V
D Contains a Relay Driver: I6 = 80mA max
D Pin3 can be used for Either a Latching Function or Automatic Resetting Function (In Both
Overload Detection and Output Offset Detection, Either Function can be Selected)
D Single Power Supply
D Both Positive and Negative Output Offset can be Detected Through the Same Pin (Output Offset Detection Through Pin2)
D AC Voltage can be Detected (For AC–Power–OFF Mute Through Pin4)
D The Time Delay from Amplifier Power ON to Relay ON can be Freely Set by Selecting External
Components. (For AC–Power–ON Mute Through Pin7)
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Power Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60V
Allowable Power Dissipation (TA = +75°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320mW
Maximum Voltage At:
Pin4, V4max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10V
Pin8, V8max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V
Pin7, V7max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V
Maximum Current At:
Pin6, I6max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80mA
Pin1, I1max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3mA
Pin2, I2max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±3mA
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C
Recommended Operating Conditions:
Parameter
Supply Voltage
Symbol
VCC
Test Conditions
Min
Typ
Max
Unit
25
45
60
V
Electrical Characteristics: (VCC = 45V, TA = +25°C, State using latching function)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Pin1 Threshold Voltage
Vth 1
Level to invert at Pin6
0.58
0.67
0.76
V
Pin2 Positive Threshold Voltage
Vth +2
Level to invert at Pin6
0.54
0.62
0.70
V
Pin2 Negative Threshold Voltage
Vth –2
Level to invert at Pin6
–0.12 –0.17 –0.23
V
Pin4 Threshold Voltage
Vth 4
Level to invert at Pin6
0.60
0.74
0.90
V
Pin8 Reference Voltage
V8
RL = 1.5kΩ
3.0
3.4
3.8
V
Pin Connection Diagram
(Front View)
8 VCC
7 VCC ON Mute
6 Relay Detect
5 GND
4 AC OFF Detect
for Latch/
3 Switch
Automatic Reset
2 Output Offset Detector
1 Overload Detector
.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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