NTE NTE1678 Integrated circuit switching regulator for tv Datasheet

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