TDA8153-Amplificador Vídeo RGB 35/250V

THREE INDEPENDENT VIDEO AMPLIFIERS WITH TYPICAL > 1000V/µs CRT-CATHODE SENSING OUTPUT FOR SEQUENTIAL SAMPLING INTERNAL G1 VOLTAGE GENERATOR CATHODE SHORT CIRCUIT PROTECTION FLASHOVER PROTECTION OF THE OUTPUT STAGES COMPENSATES POSITIVE AND NEGATIVE TUBE LEAKAGES

DESCRIPTION Realized with a high voltage bipolar technology,the is a monolithic RGB video output stage for TV color applications. It drives the CRT cathodes directly and offers a video bandwidth compatible with CCIR standards. In addition to three independent video amplifiers, the device features an internal generator for the first grid voltage, flashover protection, cathode short circuit protection and a common cut-off sensing output for use in sequential sampling applications. The TDA8153 is supplied a 15 lead Multiwatt plastic power package. PIN CONNECTIONS

GREEN OUTPUT BLUE FEEDBACK BLUE OUTPUT CUT-OFF VS V REF BLUE INPUT GROUND GREEN INPUT RED INPUT FIRST GRIDE VOLTAGE VH RED OUTPUT RED FEEDBACK GREEN FEEDBAC K

N° Name GREEN FEEDBACK RED FEEDBACK RED OUTPUT VH FIRST GRID VOLTAGE RED INPUT GREEN INPUT Function Feedback Output for 'Green' Amplifier. The optimal value for the resistor connected here to set gain 68k as shown in fig. 1.2. Other feedback connections are pin 2 (red) and pin 14 (blue). Feedback Output for 'Red' Amplifier. See pin 1. Output of 'Red' Video Amplifier. See pin 15. High Voltage Supply for Amplifier Stages, Typically 200V (see fig. 1.2). Output providing DC voltage for first grid of CRT, typically Vs + VBE.

Input of 'Red' Video Amplifier. See pin 7. Input of "Green" Video Amplifier. The bias voltage at the inputs is equal to Vref + 2VBE. Other inputs are pin 6 (red) and pin 9 (blue). GROUND Ground Connection (pin 8 is also connected to the tab). BLUE INPUT Input of 'Blue' Video Amplifier. See pin 7. Vref The reference voltage for the three amplifiers is available on this pin. Typical value is 1.6V. The capacitor connected between pin 10 and ground eliminates AC crosstalk between the amplifiers. Supply Voltage Input for Low Voltage Circuitry, typically 12V. Vs SAMPLING Cathode Current Sampling Output. Provides sum of cathode currents for automatic cut-off adjustment with video processors using the sequential system. The three current generators I1, I2 and I3 bias the inputs of this circuit which performs the cut-off adjustment, allowing also adjustment with in flowing CRT leakages. BLUE OUTPUT Output of 'Blue' Video Amplifier. See pin 15. BLUE FEEDBACK Feedback Output for 'Blue' Amplifier. See pin 1. GREEN OUTPUT Output of the 'Green' Video Amplifier. The output is protected against CRT flashovers. Other outputs are pin 3 (red) and pin 13 (blue).

2 HV OUTPUT RED 6 3 CUT-OFF SEN SING 1 VS GREEN 7 15 CUT-OFF SEN SING 14 VS BLUE 9 13 CUT-OFF SEN SING REFERENCE VOLTAGE 12 BLUE OUT CUT-OFF SAMPLING HV OUTPUT SHORT CIRCUIT PR OTECT GREEN OUT HV OUTPUT SHORT CIRCUIT PR OTECT RED OUT SHORT CIRCUIT PR OTECT

Symbol VH VS Ptot VI Tstg, Tj Toper High Voltage Supply Low Voltage Supply Power Dissipation at Tcase = 90°C Input Voltage Storage and Junction Temperature Operating Ambient Temperature Parameter Value Vs °C Unit V W
Symbol Rth (j-c) Parameter Thermal Resistance Junction-case Max Value 3 Unit °C/W