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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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TEA2037A Scheda tecnica(PDF) 4 Page - STMicroelectronics |
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TEA2037A Scheda tecnica(HTML) 4 Page - STMicroelectronics |
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4 / 9 page  ELECTRICAL CHARACTERISTICS (Tamb =25 oC) (continued) Symbol Parameter Min. Typ. Max. Unit FRAME OUTPUT (PIn 8) LV8A LV8B Saturation Voltage to Ground (V7 = 30V) I8 = 0.1 I8 =1A 0.0.6 0.37 0.6 1 V V HV8A HV8B Saturation Voltage to V7 (V7 = 30V) I8 = -0.1 I8 = -1A 1.3 1.7 1.6 2.4 V V FV8A FV8B Saturation Voltage to V7 in Flyback Mode (V8 >V7) I8 = 0.1 I8 =1A 1.6 2.5 2.1 4.5 V V FLYBACK GENERATOR (Pins 2 and 3) F2DA F2DB FSVA FSVB Flyback Transistor on (output = high state) (V2 = 30V) V3/2 with I3 → 2 = 0.1A I3 → 2 =1A V2/3 with I3 → 2 = 0.1 I3 → 2 =1A 1.5 3.0 0.8 2.2 2.1 4.5 1.1 4.5 V V V V Flyback Transistor off (output = V7 - 8V) (V7 =V2 = 30V) FCI Leakage Current Pin 2 170 µA The TEA2037A performs all the video and power functions required to provide signals for the direct drive of the line darlington and frame yoke. It contains : - A shunt regulator - A synchronization separator - An integrated frame separator without external components - A saw-tooth generator for the frame - A power amplifier for direct drive of frame yoke (short circuit protected) - An open collector output for the line darlington drive - A line phasedetector and a voltage control oscillator 15 V R Video SL1 SL2 R2 R1 Figure 1 : Synchronization Separator Circuit Q3 Q4 V Z/2 SL1 3I I ST1 ST2 V Z Figure 2 : Frame Separator The slice level of sync-separation is fixed by value of the external resistors R1 and R2.VR is an inter- nally fixed voltage. The sync-pulse allows the discharge of the capaci- tor by a 2 x 1 current. A line sync-pulse is not able to discharge the capacitor under VZ/2. Aframe sync pulse permits the complete discharge of the ca- pacitor, so during the frame sync-pulse Q3 and Q4 provide current for the other parts of the circuit. The oscillator thresholds are internally fixed by resistors. The discharge of the capacitor depends on the internal resistor R4. The control voltage is applied on resistor R5. TEA2037A 4/9 |
Codice articolo simile - TEA2037A |
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