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NTE - Integrated Circuit Dual 12W/Channel Audio Power Amplifier

Numéro de référence NTE1850
Description Integrated Circuit Dual 12W/Channel Audio Power Amplifier
Fabricant NTE 
Logo NTE 





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NTE1850 fiche technique
NTE1850
Integrated Circuit
Dual 12W/Channel Audio Power Amplifier
Description:
The NTE1850 is a dual Hi–Fi audio power amplifier in a 9–Lead SIP type package designed for
mains–fed applications such as stereo TV sound and stereo radio. The circuit is optimal for symmetri-
cal power supplies but is also well suited to asymmetrical power supply systems. An output power
of 2 x 12W (THD = 0.5%) can be delivered into an 8load with a symmetrical power supply of ±16V.
The gain is fixed internally at 30dB, but can be changed externally if required. Internal gain fixing gives
low gain spread and very good balance between the amplifiers (0.2dB).
A special feature is an input mute circuit which provides suppression of unwanted signals at the inputs
during switching on and off. This circuit disconnects the non–inverting inputs when the supply voltage
is below ±6V, while allowing the amplifiers to remain in their DC operating condition.
Two thermal protection circuits are provided, one monitors the average junction temperature and the other
the instantaneous temperature of the power transistors. Both protection circuits activate at +150°C, allow-
ing safe operation to a maximum junction temperature of +150°C without added distortion.
Features:
Applications:
D Few External Components Required
D Stereo
D Input Muted During Power ON/OFF
D TV Sound
D Low Offset Voltage Between Output and GND D Radio
D Excellent Gain Balance Between Channels
D Short–Circuit Protected
D Thermally Protected
Absolute Maximum Ratings:
Supply Voltage (Pin5 and Pin7), VCC = V5, 7–3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +20V
Non–Repetitive Peak Output Current (Pin4 and Pin6), IOSM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4A
Total Power Dissipation (TA = +25°C, Infinite Heatsink), PTOT . . . . . . . . . . . . . . . . . . . . . . . . . . . 15W
Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5°C/W
Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Short–Circuit Time (Outputs Short–Circuited to GND), tSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Hr
Thermal Resistance, Junction–to–Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25°C/W

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