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| TECHNICAL DATA VERTICAL DEFLECTION AND GUARD CIRCUIT (110) The KKA3654 is a full performance vertical deflection output circuit for direct drive of the deflection coils and can be used for a wide range of 90and 110deflection systems. A guard circuit is provided which blanks the picture tube screen in the absence of deflection current. FEATURES * * * * Direct drive to the deflection coils 90and 110deflection system Internal blanking guard circuit Internal voltage stabilizer QUICK REFERENCE DATA PARAMETER Output voltage Output current (peak-to-peak) Supply voltage Guard circuit output voltage Operating ambient temperature range Storage temperature THERMAL RESISTANCE From junction to mounting base SYMBOL V5-2 I5(p-p) V9-2 V7-2 Tamb Tstg Rth j-mb MIN. 25 55 3,5 MAX. 60 3 40 5,6 60 150 4 UNIT V A V V o C o C K/W BLOCK DIAGRAM. FUNCTIONAL DESCRIPTION Output stage and protection circuits The output stage consists of two Darlington configurations in class B arrangement. Each output transistor can deliver 1,5 A maximum and the VCEO is 60 V. Protection of the output stage is such that the operation of the transistors remains well within the SOAR area in all circumstances at the output pin, (pin 5). This is obtained by the cooperation of the thermal protection circuit, the current-voltage detector and the short circuit protection. Special measures in the internal circuit layout give the output transistors extra solidity. The same curves also apply for the upper output device. The supply for the output stage is fed to pin 6 and the output stage ground is connected to pin 4. 1 KKA3654 Driver and switching circuit Pin 1 is the input for the driver of the output stage. The signal at pin 1 is also applied to pin 3 which is the input of a switching circuit (pin 1 and 3 are connected via external resistors). This switching circuit rapidly turns off the lower output stage when the flyback starts and it, therefore, allows a quick start of the flyback generator. The maximum required input signal for the maximum output current peak-to-peak value of 3 A is only 3 V, the sum of the currents in pins 1 and 3 is then maximum 1 mA. Flyback generator During scan, the capacitor between pins 6 and 8 is charged to a level which is dependent on the value of the resistor at pin 8 (see Block diagram ). When the flyback starts and the voltage at the output pin (pin 5) exceeds the supply voltage, the flyback generator is activated. The supply voltage is then connected in series, via pin 8, with the voltage across the capacitor during the flyback period. This implies that during scan the supply voltage can be reduced to the required scan voltage plus saturation voltage of the output transistors. The amplitude of the flyback voltage can be chosen by changing the value of the external resistor at pin 8. It should be noted that the application is chosen such that the lowest voltage at pin 8 is > 1,5 V, during normal operation. Guard circuit When there is no deflection current, for any reason, the voltage at pin 8 becomes less than 1 V, the guard circuit will produce a d.c. voltage at pin 7. This voltage can be used to blank the picture tube, so that the screen will not burn in. Voltage stabilizer The internal voltage stabilizer provides a stabilized supply of 6 V to drive the output stage, so the drive current is not affected by supply voltage variations. RATINGS Pins 2 and 4 are externally connected to ground. PARAMETER Voltages Output voltage Supply voltage Supply voltage output stage Input voltage Input voltage switching circuit External voltage at pin 7 Currents Repetitive peak output current Non-repetitive peak output current (note 1) Repetitive peak output current of flyback generator Non-repetitive peak output current of flyback generator (note 1) Temperatures Storage temperature range Operating ambient temperature range Operating junction temperature range (the output current at pin 5 should not exceed 2.5A) SYMBOL V5-4 V9-4 V6-4 V1-2 V3-2 V7-2 +I5RM +I5SM I8RM +I8SM Tstg Tamb Tj 65 25 25 MIN. 0 0 0 0 0 0 MAX. 60 40 60 V9-4 V9-4 5,6 1,5 3 1,5 1,6 3 150 60 150 UNIT V V V V V V A A A A A o o C C o C 2 KKA3654 CHARACTERISTICS Tamb = 25 oC, supply voltage (V9-4) = 26 V; unless otherwise stated; pin 1 externally connected to pin 3. Pins 2 and 4 externally connected to ground. PARAMETER Supply Supply voltage, pin 9 (note 2) Supply voltage output stage Supply current, pins 6 and 9 (note 3) Quiescent current Variation of quiescent current with temperature Output current Output current, pin 5 (peak-to-peak) Output current flyback generator, pin 8 Output voltage Peak voltage during flyback Saturation voltage to supply at I5 = 1,5 A at I5 = 1,5 A (note 4) at I5 = 1,2 A at I5 = 1,2 A (note 4) Saturation voltage to ground at I5 = 1,2 A at I5 = 1,5 A Flyback generator Saturation voltage at I8 = 1,6 A at I8 = 1,5 A (note 4) at I8 = 1,3 A at I8 = 1,2 A (note 4) Leakage current at pin 8 Flyback generator active if: Input Input current, pin 1, for I5 = 1,5 A Input voltage during scan, pin 1 Input current, pin 3, during scan (note 5) Input voltage, pin 3, during scan (note 5) Input voltage, pin 1, during flyback Input voltage, pin 3, during flyback Guard circuit Output voltage, pin 7 RL = 100 k (note 8) Output voltage, pin 7 at IL = 0,5 mA (note 8) Internal series resistance of pin 7 Guard circuit activates (note 6) General data Thermal protection activation range SYMBOL V9-4 V6-4 I6+I9 I4 TC I5(p-p) I8(p-p) I8(p-p) V5-4 V6-5(sat) V5-6(sat) V6-5(sat) V5-6(sat) V5-4(sat) V5-4(sat) V9-8(sat) V8-9(sat) V9-8(sat) V8-9(sat) I8 V5-9 I1 V1-2 I3 V3-2 V1-2 V3-2 V7-2 V7-2 Ri7 V8-2 Tj 4 0,03 0,8 4,1 3,4 0,95 158 MIN. 10 55 40 0,04 2,5 1,25 1,35 2,5 2,5 2,2 2,3 2,2 2,5 35 25 TYP. MAX. 40 60 85 65 3 1,5 1,6 60 3,2 3,2 2,7 2,8 2,7 3,2 UNIT V V mA mA mA/K A A A V V V V V V V 1,6 2,3 1,4 2,2 5 0,33 2,35 4,5 3,9 1,35 175 2,1 3 1,9 2,7 100 0,55 3 V9-4 250 250 5,8 5,3 1,7 1,0 192 V V V V A V mA V mA V mV mV V V k V o C 3 KKA3654 PARAMETER Thermal resistance From junction to mounting base Open loop gain at 1 kHz; (note 7) Frequency response, 3 dB; (note 9) SYMBOL Rth j-mb Go f MIN. TYP. 3,5 33 60 MAX. 4 UNIT K/W kHz Notes 1. Non-repetitive duty factor 3,3%. 2. The maximum supply voltage should be chosen so that during flyback the voltage at pin 5 does not exceed 60 V. 3. When V5-4 is 13 V and no load at pin 5. 4. Duty cycle, d = 5% or d = 0,05. 5. When pin 3 is driven separately from pin 1. 6. During normal operation the voltage V8-2 may not be lower than 1,5 V. 7. RL = 8 ; IL = 125 mA (r.m.s.). 8. If guard circuit is active. 9. With a 22 pF capacitor between pins 1 and 5. APPLICATION DIAGRAM. 4 KKA3654 * 9-Pin Plastic Power Single-in-Line (SIL-9MPF, SOT 131-2) 24-0.21 19.8 0.026 4.4 0.15 3.2 0.15 16.8 0.135 2 0.06 1 2.54 9 0.4 0.05 0.65 0.05 0.25 M * 9-Pin Plas(SIL-9P, SOT 157-2) 24-0.21 19.8 0.026 4.4 0.15 0.35 2 0.06 1 2.54 0.65 0.05 0.25 M 9 4.3 0.8 M 12 2 0.2 0.4 0.05 5.08 17 max 3.2 0.15 12-0.18 12-0.18 5 |
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