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NTE7135 Integrated Circuit Vertical Deflection Power Amplifier for Monitors
Description: The NTE7135 is a vertical power amplifier for differential input signals in a 9-Lead SIP type package suitable for color monitor/TV systems with deflection frequencies up to 140Hz. Features: D Vertical Pre-Amplifier with Differential Inputs D Powerless Vertical Shift D Flyback Voltage Generation Suitable for Two Operating Modes (Doubling the Supply Voltage or External Supply for the Short Flyback Time, this Achieves a Minimum of Power Dissipation) D Vertical Output Stage with Thermal and SOAR Protection D High Deflection Frequency up to 140Hz D High Linear Sawtooth Signal Amplification D Possibility of Guarding the Deflection D Voltage Stabilizer Absolute Maximum Ratings: (Voltages referenced to substrate (Pin6) unbless otherwise specified) Supply Voltage (Pin1), VP1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V Supply Voltage (Pin4), VP2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60V Supply Voltage (Pin8), VP3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60V Voltage on Pin2, Pin3, and Pin9, V2, V3, V9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VP1 Voltage on Pin5 and Pin7, V5, V7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60V Current on Pin4, I4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A Output Current on Pin5 (Peak Value, Note 1), I5 (M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3A Flyback Current on Pin7 (Peak Value), I7 (M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3A Current on Pin9, I9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8A Junction Temperature (Note 1), TVJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +168C Operating Ambient Temperatrure Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +75C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -25 to +150C Thermal Resistance, Junction-to-Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10K/W Electrostatic Handling for all Pins (Note 2), Ves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300V Note 1. Internally limited by thermal protection; switching temperature point at 160 8C Note 2. Equivalent to discharging a 200pF capacitor throuhg a 0 series resistor.
Electrical Characteristics: (VP1 = VP2 = 25V, VN = V6 = 0V, TA = +25C, voltages referenced to substrate (Pin6) unless otherwise specified)
Parameter Supply Voltage 1 (Pin1) Supply Voltage 2 (Pin4) Supply Voltage 3 (Pin8) Supply Current (Pin1) Quiescent Supply Current (Pin4) Pre-Amplifier Input Voltage (Pin2 and Pin3) Input Quiescent Current Flyback Generator Output Voltage Flyback Output Current (Maximum Value, Pin7) Threshold Voltage to Switch Flyback Flyback Pulse Time Vertical Output Output Voltage V5 I5 (M) LIN Upper Value, I5 = -1A Lower Value, I5 = 1A Vertical Output Current (Maximum Value, Pin5) Non-Linearity of Output Signal Pulse Circuit Output Output Voltage Output Voltage for Thermal Protection Active Voltage to Insert Flyback Pulse on Pin9 Pulse Width V9 V9 V1-5 tp9 Normal Condition Deflection Open-Circuit Normal Condition RPCO = 10k 0.4 VP1-0.4 - - tp FLB - - - 50 - VP1-0.4 - 1.4 - - V V V % s VP3-2.3 - - - VP2-2 1.5 - - - 1.7 1 1 V V A % V7 I7 (M) V1-5 tp FLB ON/OFF Threshold Upper Value, I7 = -1A - - - - VP3-2.2 - 1.4 250 - 1 - - V A V s V2, V3 I2, I3 Without Input Signal 1.6 - - 100 VP1-0.5 - V nA Symbol VP1 VP2 VP3 IP1 IP2 Without Input Signal Test Conditions Min 9 9 9 - - Typ 25 25 - - 9 Max 30 60 60 10 - Unit V V V mA mA
Functional Description: Differential Input Amplifier The differential sawtooth input signal (coming from a ramp output of the NTE7132 for example) is fed to the input pins 2 and 3. The non-inverted signal is attached to Pin3. The vertical feedback signal is superimposed on the inverted input signal on Pin2. Vertical shift is applied at the inputs in a power-less way. Flyback Generator Signals for the flyback generator and the pulse circuit are generated in the flyback driver stage. The flyback output consists of a Darlington transistor and a flyback diode. The flyback generator can operate in two modes: 1. An external supply voltage is applied for the short flyback time, thus power dissipation is minimum. 2. The flyback voltage is generated by doubling the supply voltage. The 100F capacitor C2 between Pin4 and Pin7 is charged up to VP1 during scan, using the external diode and the resistor R2. The cathode of the capacitor C2 is connected to the positive rail during flyback. Thus, the flyback voltage is twice the supply voltage.
Functional Description (Cont'd): Vertical Output The vertical output stage is a quasi-complementary class-B amplifier with a high linearity. The output contains SOAR (short-circuit protection) and thermal protection. Tne output current on Pin5 is reduced for a short time (to let the temperature decrease to TJ < +150C), when the junction temperature (TJ) exceeds +160C. Deflection GUARD Pin9 will go HIGH if the junction temperature goes to high. A pulse signal with 50% duty cycle is output on Pin9, if the deflection coil is open-circuit. A flyback pulse signal is output at normal conditions. Further watching can be achieved by means of an external GUARD circuit. The 22F capacitor is charged during flyback time (V5 > V8) at normal conditions. In case of failures, the capacitor is discharged and the GUARD output goes HIGH. GUARD output level: D LOW for normal conditions D HIGH for deflection coil short-circuit respectively open-circuit D HIGH when there are neither input or output signals
Pin Connection Diagram (Front View)
9 Pulse Circuit Output 8 VP3 (Flyback) 7 Flyback Generator Output 6 Substrate 5 Vertical Output 4 VP2 (Vertical Output Stage) 3 Differential Input Amp Input 2 2 Differential Input Amp Input 1 1 VP1
.827 (21.0) .130 (3.3) Dia .590 (15.0) .065 (1.68) .242 (6.1)
Seating Plane
.228 (5.8)
.169 (4.3) 1 9
.728 (18.5)
.250 (6.35)
.134 (3.42) .100 (2.54)
.118 (3.0) Min .140 (3.56) .886 (22.0)

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