NTE1888
Integrated Circuit
Horizontal and Vertical Deflection Monitor
Features:
DDirect Line Darlington Drive
DDirect Frame Yoke Drive (± 1A)
DComposite Video Signal Input Capability
DFrame Output Protection Against Short Circuits
DPLL
Description:
The NTE1888 is both a horizontal and a vertical deflection circuit in one 16–Lead DIP package.
Absolute Maximum Ratings:
Supply Voltage VCC1 30V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flyback Generator Supply Voltage V235V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frame Power Supply Voltage V760V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frame Output Current, I8
Non–Repetitive ±1.5A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous ±1.0A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line Output Voltage (External), V14 60V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line Output Peak Current, IP14 0.8A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line Output Continuous Current, IC14 0.4A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, Tstg –40° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Operating Junction Temperature, Tj+150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Thermal Resistance, Junction–to–Case, RthJC 15°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Thermal Resistance, Junction–to–Ambient, RthJA
(soldered on a 35µm thick 45cm2 PC board copper area) 45°C/W. . . . . . . . . . . . . . . . . . . . . .
Maximum Recommended Junction Temperature, TJ +120°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (TA = +25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Supply Current ICC1@ Pin16 10 – 20 mA
Supply Voltage VCC1 ICC1 = 15mA 9.0 9.8 10.5 V
Voltage Variation ∆VCC1 ICC1 = 10mA→20mA –280 50 +280 mV
Starting Threshold for
Line Output Pulses LPS – – 5 V
FFP
MFP
Electrical Characteristics (Cont’d): (TA = +25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Reference Voltage V15 @ Pin15 I15 = –1µA 1.4 1.75 2.0 V
Minimum Width of Frame Pulse
(when synchronized with TTL
signal)
MWF 50 – – µs
Low Threshold Voltage LT9@ Pin9 2.8 3.2 3.6 V
High Threshold Voltage HT96.4 6.6 7.8 V
Bias Current BI9–100 –nA
Discharge Impedance DR91.0 1.4 1.8 kΩ
Free Running Line Period FLP1 R = 34.9kΩ to Vcc1,
C = 2.2nF to GND 62 64 66 µs
FLP2 R = 13.7kΩ, C = 2.2nF –27 –µs
Oscilator Threshold for Line Output
Pulse Triggering OT9–4.6 –V
Horizontal Frequency Drift
w/Temperature DF
∆Θ –2–Hz/°C
Saturation Voltage LV14 @ Pin14 I14 = 200mA –1.1 1.6 V
Output Pulse Width OPW Line Period = 64µs 20 22 24 µs
Bias Voltage V11 @ Pin11 1.8 2.4 3.2 V
Input Impedance Z11 4.5 5.8 8.0 kΩ
Output Current During Synchro
Pulse I10 @ Pin10 250 450 800 µA
Current Ratio RI10 Positive/Negative 0.95 1.0 1.05
Leakage Current LI10 –2–+2 µA
Control Range Voltage CV10 2.6 –7.1 V
Low Threshold Voltage LT1@ Pin1 1.6 2.0 2.3 V
High Threshold Voltage HT12.6 3.1 3.6 V
Bias Current BI1–30 –nA
Discharge Impedance DR1300 470 700 W
Free Running Frame Period FFP1 @ Pin1 R = 845kΩ to Vcc1,
C = 180nF to GND 20.5 23.0 25.0 ms
Minimum Frame Period MFP I15 = –100µA,
R = 845kΩ to Vcc1,
C = 180nF to GND
–12.8 –ms
Free Running Frame Period FFP2 R = 408kΩ, C = 220nF –14.3 –ms
Frame Period Ratio FPR Note 1 1.7 1.8 1.9
Frame Sawtooth Gain FG Between Pin1 and
Non–Inverting input of
the Frame Amplifier
– –0.4 –
Vertical Frequency Drift
w/Temperature DF
∆Θ @ Pin1 –4.1–3–Hz/°C
Operating Voltage V7@ Pin7 w/Flyback Generator 10 –58 V
Note 1. Frame Period Ratio =
FFP
MFP
Electrical Characteristics (Cont’d): (TA = +25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Supply Current I7@ Pin7 V7 = 30V – – 22 mA
Operating Voltage V2@ Pin2 10 –30 V
Saturation Voltage to GND LV8A @ Pin8 V7 = 80V, I8 = 0.1A –0.06 0.6 V
LV8B V7 = 80V, I8 = 1A –0.37 1.0 V
Saturation Voltage to V7HV8A V7 = 30V, I8 = –0.1A –1.3 1.6 V
HV8B V7 = 30V, I8 = –1A –1.7 2.4 V
Saturation Voltage to V7 in FV8A V8 > V7, I8 = 0.1A –1.6 2.1 V
Flyback Mode FV8B V8 > V7, I8 = 1A –2.5 4.5 V
Flyback Transistor ON F2DA @ Pin2 V2/3 with I3 →2 = 0.1A –1.5 2.1 V
(Output = High State) F2DB & Pin3,
V = 30V V2/3 with I3 →2 = 1A –3.0 4.5 V
FSVA V2 = 30V V3/2 with I2 →3 = 0.1A –0.8 1.1 V
FSVB V3/2 with I2 →3 = 0.1A –2.2 4.5 V
Flyback Transistor OFF
(Output = V7 – V8)FCI @ Pin2
& Pin3 V7 = V2 = 30V,
Leakage Current Pin2 – – 170 µA
Note 1. Frame Period Ratio =
Application Notes:
The NTE1888 performs all the video and power functions required to provide signals for the direct
drive of the line darlington and frame yoke. It contains:
DA shunt regulator
DA synchronization separator
DAn integrated frame separator without external components
DA saw–tooth generator for the frame
DA power amplifier for direct drive of frame yoke (short circuit protected)
DAn open collector output for the line darlington drive
DA line phase detector and a voltage control oscillator
Synchronization Separator
The slice level of sync separation is fixed by the value of external resistors controlled by an
internally fixed voltage.
Frame Separator
The sync–pulse allows the discharge of the external capacitor by a 2 x I current. Capacitor
discharge is held by VZ/2, and a frame sync pulse permits the complete discharge of the capci-
tor to provide current for the other parts of the circuit.
Line Oscillator
The oscillator thresholds are internally fixed by resistors. The discharge of the capacitor de-
pends on a internal resistor.
Phase Comparator
The sync–pulse drives the current in the comparator. The line flyback integrated by the exter-
nal network gives a sawtooth on Pin11. The comparator output provides a positive current for
the part of the signal on Pin11 greater than VCC and a negative current for the other part. When
the line flyback and the video signal are synchronized, the output of the comparator is an alter-
natively negative and positive current. The frame sync–pulse inhibits the comparator to pre-
vent frequency drift of the line oscillator on the frame beginning.
Application Notes (Cont’d):
Line Output (Pin14)
It i s a n o pen c ollector o utput w hich i s a ble t o d rive a p ulse c urrent o f 8 00mA f or a r apid d ischarging
of the darlington base. The output pulse time is 22µs for a 64µs period.
Frame Oscillator
The oscillator thresholds are internally fixed by resistors. The oscillator is synchronized during
the last half free run period. The input current during the charge of the capacitor is less than
100nA.
Frame Output Amplifier
This amplifier is able to directly drive the frame yoke. Its output is short circuit and overload
protected; it contains also thermal protection
VCC1
Pin Connection Diagram
1
2
3
4
Frame OSC
Flyback Generator Supply
Frame Flyback
GND
5GND
6INV Input
7
Frame Power Supply
16
15
14
13
Video Input
Line Output
GND
12 GND
11 Line Flyback
10 Phase Detector
8Frame Output 9Line OSC
.700 (17.78)
.100 (2.54)
18
16 9
.200
(5.08)
Max
.870 (22.0) Max .260 (6.6)
Max
.099 (2.5) Min
