поискавой системы для электроныых деталей |
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TDA8354 датащи(PDF) 4 Page - NXP Semiconductors |
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TDA8354 датащи(HTML) 4 Page - NXP Semiconductors |
4 / 16 page 1998 Sep 03 4 Philips Semiconductors Preliminary specification Full bridge current driven vertical deflection output circuit in LVDMOS TDA8354Q PINNING SYMBOL PIN DESCRIPTION Vo(guard) 1 guard output voltage Vi(M) 2 measuring resistor input Vi(con) 3 conversion resistor input VP(B) 4 supply voltage B Vo(B) 5 output voltage B GNDB 6 ground B Vflb 7 flyback supply voltage GNDA 8 ground A Vo(A) 9 output voltage A VP(A) 10 supply voltage A Ii(neg) 11 input power-stage (negative); includes Ii(bias) signal bias Ii(pos) 12 input power-stage (positive); includes Ii(bias) signal bias Ii(comp) 13 damping resistor compensation current input Fig.2 Pin configuration. The die has been glued to the metal block of the package. If the metal block is not insulated from the heat sink, the heat sink may only be connected directly to pins 6 and 8. handbook, halfpage TDA8354Q MGL462 1 2 3 4 5 6 7 8 9 10 11 12 13 Vo(guard) Vi(M) Vi(con) VP(B) Vo(B) GNDB Vflb GNDA Vo(A) VP(A) Ii(neg) Ii(pos) Ii(comp) FUNCTIONAL DESCRIPTION The vertical driver circuit is a bridge configuration. The deflection coil is connected between the output amplifiers, which are driven in phase opposition. The differential input circuit is current driven. The input circuit is special intended for direct connection to driver circuits which deliver symmetrical current signals, but is also suitable for asymmetrical currents. The current to voltage conversion is done by the external resistor (Rcon) connected between the output of the input conversion stage and output stage B. This voltage is compared with the output current through the deflection coil measured as voltage across RM, which provides internal feedback information. The relationship between the differential input current and the output current is defined by: 2 × Ii(diff) × Rcon =Icoil × RM The output current is adjustable from 0.5 A (p-p) to 3.2 A (p-p) by varying Rcon. The maximum input current is 800 µA peak for each pin. The minimum input current should be 50 µA. Flyback supply The flyback voltage is determined by an additional supply voltage Vflb. The principle of operating with two supply voltages (class G) makes it possible to fix the supply voltage VP optimum for the scan voltage and the second supply voltage Vflb optimum for the flyback voltage. Using this method, very high efficiency is achieved. The supply voltage Vflb is almost totally available as flyback voltage across the coil, this being possible due to the absence of a coupling capacitor (not necessary, due to the bridge configuration). The very short rise and fall time of the flyback switch is >400 V/ µs. Protection The output circuit has protection circuits for: • Die temperature control • Overvoltage of output stage A. |
Аналогичный номер детали - TDA8354 |
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Аналогичное описание - TDA8354 |
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