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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-insulated 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: (TA = +25C 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, RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5k to External Oscillation Capacitor, CO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0F to 1F Input Voltage of Error Amplifier, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 (TA = +75C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +75C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to +125C
Electrical Characteristics: (TA = +25C unless otherwise specified)
Parameter Supply Terminal Voltage Thermal Drift of V8 Starting Supply Current Symbol V8 dV8(TA) I8 P7(S) V8(S) fo(S) P7 I7 V7(sat) I6(1) I6L V6T I2 PL dPL(TA) V4(ON) I4(ON) V3(Sat) I3L V(OS) AVO I1 I14 V13(Max) V13(Min) I13 Vfo Vfo(S) fo dfo (TA) Vso dVso(TA) I8 = 12mA Difference of Min. and Max.of V8 in TA from -20 to +75C V8 = 3V, Pin7: Open V8 = 3V, Pin7: GND Starting Pulse Height Starting Supply Terminal Voltage Starting Oscillation Frequency Output Pulse Height Drain of Output Pin Saturation Voltage of Output Pin Integration Pin Current V8 = 3V, Pin7: Open, Pin6: GND Pin7: Open, Pulse of Pin7 = 1.5Vp-p V8 = 3V, Pin10: Open Pin7: Open, Pin6: GND Pin7: GND, V2 = V8 I7 = 5mA I5 = 100A V5 = 0.8V Leak of Integration Pin Trigger Voltage of Shut Down Circuit Drain of Duty Limit Terminal Pulse Width set by Pin 2 Voltage Thermal Drift of PL ON Voltage of Pin 4 ON Current of Pin 4 Output Saturation of ON/OFF Circuit Leak of ON/OFF Output Offset Voltage of Error Amplifier Opened Gain of Error Amplifier Current of Pin1 Current of Pin14 Maximum Voltage of Error Amplifier Output Minimum Voltage of Error Amplifier Output Sink of Error Amplifier Output Free Running Oscillation Amplitude Starting Oscillation Amplitude Free Running Oscillation Frequency Thermal Drift of fo Synchronous Oscillation Amplitude Thermal Drift of VSO V5 = 0.3V P7 < 100mVp-p V2 = 3V V = 2.33V, Frequency: 15.75kHz, Low Level Period V2 = 2.33V, Difference of Min & Max. of PL in TA from -20 to +75C I3 = 3mA, V3 = 0.3V I3 = 3mA, V3 = 0.3V I3 = 3mA, V4 = 3.5V V4 = 1.5V, V3 = V8 Absolute Value f: 1kHz, Signal of Pin13: 1Vp-p Pin1: GND Pin14: GND V1 = 3.5V, V14 = 3.0V V1 = 2.5V, V14 = 3.0V V1 = 2.5V, V14 = 3.0V, V13 = 3.0V Pin10: Open V8 = 3.0V Pin10: Open Pin10: Open, Difference of Min & Max of f in TA from -20 to +75C Synchronous Frequency: 15.75kHz Difference of Min & Max of Vso in TA from -20 to +75C Test Conditions Min 6.1 - - - 1.5 2.0 10 5.0 -6.3 - -700 -700 -10 2.5 -20 25 - 1.5 - - - - 45 - - 5.0 - 50 Vso 0.5 12.3 - 2.7 - Typ 6.6 - 1.0 3.0 2.3 2.6 13 6.0 -5.0 - -500 -500 - - - 30 - 2.5 - - - 8 53 - - 5.7 50 100 3.3 1.5 13.3 - 3.0 - Max 7.1 200 1.5 4.2 3.0 3.0 20 7.1 -3.7 0.3 -300 -300 0 3.5 0 35 2 3.5 200 300 1 20 80 -10 -10 - 300 250 4.0 - 14.3 500 3.3 150 Unit V mV mA mA Vpp V kHz Vp-p mA V A A A V A s s V A mV A mV dB A A V mV A Vp-p Vp-p kHz Hz Vp-p V
Electrical Characteristics (Cont'd): (TA = +25C unless otherwise specified)
Parameter High Level of Oscillation Starting VOH Thermal Drift of VOH Synchronous Signal Voltage Symbol VOH VOH(s) V8 = 3.0V dVOH(TA) Difference of Min & Max of VOH in TA from -20 to+75C VS Oscillation is Synchronizing (15.75kHz) Oscillation is Synchronizing (15.75kHz) Pin Connection Diagram Test Conditions Min - 1.0 - -1.0 -200 Typ 3.8 1.8 - - -40 Max 4.5 - 100 +0.3 - Unit V V mV V A
Error Voltage Input 1 Duty Limit 2 ON/OFF Output 3 ON/OFF Input 4 Current Limit 5 Shutdown 6 Pulse Output 7
14 Reference Voltage Input 13 Error Amp Output 12 Comparator Input 11 OSC 10 Synchronization 9 GND 8 VCC
14
8
1
7
.827 (21.0) Max .197 (5.0) Max
.300 (7.62)
.100 (2.45) .600 (15.24)
.099 (2.5) Min
.100 (2.54)
.025 (0.65)
.099 (2.5)
.012 (0.30)

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