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NTE1672 Dataheets PDF



Part Number NTE1672
Manufacturers NTE
Logo NTE
Description Integrated Circuit Power Supply Controller
Datasheet NTE1672 DatasheetNTE1672 Datasheet (PDF)

NTE1672 Integrated Circuit Power Supply Control Circuit Description: The NTE1672 is a control circuit in a 16–Lead DIP type package designed for use in switched mode power supplies. This single monolithic chip incorporates all the control and housekeeping (protection) functions required in switched mode power supplies, including an internal temperature compensated reference source, internal Zener references, sawtooth generator, pulse width modulator, output stage, and various protection circuits.

  NTE1672   NTE1672



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NTE1672 Integrated Circuit Power Supply Control Circuit Description: The NTE1672 is a control circuit in a 16–Lead DIP type package designed for use in switched mode power supplies. This single monolithic chip incorporates all the control and housekeeping (protection) functions required in switched mode power supplies, including an internal temperature compensated reference source, internal Zener references, sawtooth generator, pulse width modulator, output stage, and various protection circuits. Features: D Stabilized Power Supply D Temperature Compensated Reference Source D Sawtooth Generator D Pulse Width Modulator D Remote ON/OFF Switching D Current Limiting D D D D D D Low Supply Voltage Protection Loop Fault Protection Demagnetization/Overvoltage Protection Maximum Duty Cycle Clamp Feed Forward Control External Synchronization Absolute Maximum Ratings: Supply Voltage Forced Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +18V Current Fed Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA Output Transistor (at 20 – 30V Max) Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA Collector Voltage (Pin15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC +1.4V Maximum Emitter Voltage (Pin14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V Operating Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C DC Electrical Characteristics: (TA = +25°C, VCC = 12V unless otherwise specified) Parameter Reference Sections Internal Reference Voltage (Vref) Temperature Coefficient of Vref Internal Zener Reference (VZ) Temperature Coefficient of VZ IL = –7mA Test Conditions TA = +25°C TA = 0° to +70°C Min 3.57 3.53 – 7.8 – Typ 3.72 – –100 8.4 200 Max 3.95 4.00 – 8.8 – Unit V V ppm/°C V ppm/°C DC Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 12V unless otherwise specified) Parameter Oscillator Section Frequency Range Initial Accuracy Oscillator Duty Cycle Range Modulator Modulation Input Current Housekeeping Function Pin6, Input Current Pin6, Duty Cycle Limit Control Pin1, Low Supply Voltage Protection Thresholds Pin3, Feedback Loop Protection Trip Threshold Pin3, Pull–Up Current at 2V Pin13, Demagnetization/Over Voltage TA = 0° to +70°C Protection Trip on Threshold Pin13, Input Current Pin16, Feed Forward Duty Cycle Control Pin16, Feed Forward Input Current (Note 1) External Synchronization Pin9 OFF Pin9 ON Pin9 Sink Current Remote Pin10 OFF Pin10 ON Pin10 Sink Current Current Limiting Pin11, IIN .


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