NTE1678 Datasheet, PDF (1/3 Pages) NTE Electronics – Integrated Circuit Switching Regulator for TV

NTE1678
Integrated Circuit
Switching Regulator for TV
Description:
The NTE1687 is a switching regulator integrated circuit in a 14–Lead DIP type package especially
designed for TV sets. This device can be used for both types of TV sets, insulated type and non–insu-
lated types.
The NTE1687 operates in synchronizing with the horizontal retrace pulse, so it does not generate any
visual noise in the picture on the CRT. The output transistor in the powersupply circuit is protected
doubly by the internal protection circuit for over load.
The ON/OFF operation of the power supply is able to operate easily without any mechanical relay
using the provided terminal, so timer operation, remote control, etc. are very easy.
Features:
D Wide range of regulating input line voltage: AC 80V to 280V
D The output power transistor is doubly protected by the current limitter and the shut down circuit
D No visual noise due to horizontal synchronous operation
D A terminal for remote control, timer operation and etc. of the power supply is provided
D Shut down circuit is easily resetable using ON/OFF terminal
D Low stand–by and starting current
Absolute Maximum Ratings: (T_A = +25°C unless otherwise specified)
Supply Current, I₈ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA
Sink of Output Terminal, I₇ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA
Input Voltages of Current Limitter, V₅ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0V
Input Voltage ON/OFF Circuit, V₄ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V₈V
Sink of ON/OFF Circuit, I₃ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5mA
Input Voltages of Duty Limit Circuit, V₂ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V₈ V
External Oscillation Resistor, R_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5kΩ to ∞
External Oscillation Capacitor, C_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0µF to 1µF
Input Voltage of Error Amplifier, V_I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V₈ V
Reference Voltage, V₁₄ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V₈ V
Drain of Error Amplifier, I₁₃ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –2mA to 0mA
Input Voltage of Shut Down Circuit, V₁₂ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V₈ V
Integration Voltage of Shut Down Circuit, V₆ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V₈ V
Power Dissipation (T_A = +75°C), P_D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150mW
Operating Temperature Range, T_opr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C
Storage Temperature Range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C