TDA8153 RGB VIDEO OUTPUT AMPLIFIER . . .. . . THREE INDEPENDENT VIDEO AMPLIFIERS WITH TYPICAL SR > 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 TDA8153 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 in a 15 lead Multiwatt plastic power package. MULTIWATT15 (Plastic Package) ORDER CODE : TDA8153 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 8153-01.EPS 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Tab connected to Pin 8 January 1993 1/11 TDA8153 PIN FUNCTIONS 2 3 4 5 6 7 8 9 10 11 12 13 14 15 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 is 68kΩ 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). 8153-01.TBL N° 1 SCHEMATIC DIAGRAM Q31 R1 I1 R6 Q32 R2 I2 R11 Q33 D4 D7 D5 Q13 D6 D8 3 D9 15 Q2 13 Q14 Q8 2 14 1 R3 I4 D10 Q7 D3 I3 R12 R7 Q1 D2 R27 R26 R25 4 R9 R13 12 Q5 Q11 Q17 11 5 D11 Q4 7 Q6 R4 9 Q10 Q16 Q12 R5 R9 R10 Q15 R14 R15 10 1.6V 8 2/11 8153-02.EPS 6 TDA8153 BLOCK DIAGRAM VS VH 11 4 2 SHORT CIRCUIT PR OTECT HV OUTPUT RED IN 6 3 RED OUT 15 GREEN OUT 13 BLUE OUT 12 CUT-OFF SAMPLING CUT-OFF SEN SING VH 1 VS GREEN IN SHORT CIRCUIT PR OTECT HV OUTPUT 7 CUT-OFF SEN SING VH 14 VS BLUE IN SHORT CIRCUIT PR OTECT HV OUTPUT 9 CUT-OFF SEN SING REFERENCE VOLTAGE TDA8153 8 8153-03.EPS 10 Symbol Parameter Value Unit 250 V VH High Voltage Supply VS Low Voltage Supply 35 V Ptot Power Dissipation at Tcase = 90°C 20 W Input Voltage Vs VI Tstg, Tj Toper Storage and Junction Temperature Operating Ambient Temperature – 25, + 150 °C 0, + 70 °C 8153-02.TBL ABSOLUTE MAXIMUM RATINGS Symbol Rth (j-c) Parameter Thermal Resistance Junction-case Max Value Unit 3 °C/W 3/11 8153-03.TBL THERMAL DATA TDA8153 Symbol Parameter Test Conditions Pin VHT High Voltage Supply 4 VS Low Voltage Supply 11 IHT Quiescent Drain Current Vin = 0, Vodc = Vsat H 4 IS Quiescent Drain Current Vin = 0, Vodc = Vsat H 11 Min. 10.8 Max. Unit Fig. 200 220 V 1-2 12 13.2 V 1-2 10 15 mA 1 10 17 mA 1 1.6 1.9 V 1 Vref Reference Voltage 10 Vg1 CRT G1 Voltage Supply 5 Vs + Vbe V 1 Vsat H Output Saturation Vin = 0, Vdc = – 3V 3 13 15 VHT –3V V 1 Vsat L Output Saturation Vin = 0, Vdc = 9V 3 13 15 Vs V 1 See schematic diagr. Vin = 0 ; Vodc = 150V 12 µA 1 Quiescent Output Voltage Inputs Floating 3 13 15 V 1 Peak-to-peak Output Swing f = 10KHz 3 13 15 Vpp 1 V/°C 1 V/°C 1 I1, I2, I3 Vodc Vo 1.4 Typ. 7 15 20 123 170 ∆Vodc ∆T DC Output Voltage versus Temperature ∆Vodc ∆T DC Differential Voltage versus Temperature Vodc = 150V Tamb = 0 ÷ 70°C GVo Open-loop Gain Vin = 50mVpp, f = 10kHz 50 56 dB 1 GVc Closed-loop Gain Vin = 1.5Vpp, f = 10kHz 20 25 dB 1 Bw Video Bandwidth (– 3 dB) Vobl = 125V, 0dB at f = 100kHz Vo = 80Vpp 50Vpp 10Vpp 4.5 6.5 12 6.0 8.0 15 MHz 2 Vodc = 150V Tamb = 0 ÷ 70°C 3 13 15 0.03 3 13 15 0.015 tr Rise Time Vo = 100Vpp ; Vobl = 150V f = 100kHz, Duty Cycle = 0.5 80 120 ns 2 tf Fall Time Vo = 100Vpp ; Vobl = 150V f = 100kHz, Duty Cycle = 0.5 80 120 ns 2 ∆T 20 ns 2 Overshoot Differential Rise and Fall Time Vo = 100Vpp , Vobl = 150V f = 100kHz, Duty Cycle = 0.5 5 % 2 Undershoot Vo = 100Vpp ; Vobl = 150V f = 100kHz, Duty Cycle = 0.5 5 % 2 * CL = 10pF is the sum of the P.C. board capacitance (with socket) and the cathode capacitance of the CRT. 4/11 8153-04.TBL ELECTRICAL CHARACTERISTICS (ref. to test and application circuits, VHT = 200V, VS = 12V, CL = 10pF *, heatsink Rth = 9oC/W, Tamb = 25oC unless otherwise specified) TDA8153 TEST CIRCUIT R2 +VHT R1 +VS C2 C1 4 11 R16 2 5 1 R3 13 14 R4 B OUT CL R5 B IN VG1 R13 R14 R6 15 G OUT 9 G IN CL R7 R15 7 Vin VDC R IN 3 R8 R OUT CL 6 CUT-OFF R12 R11 R10 R9 12 10 8 8153-04.EPS C3 GND 5/11 TDA8153 TEST CIRCUIT GREEN IN R2 +VHT R16 VG1 R15 RED OUT R3 C2 R8 R4 R7 R11 R12 R10 RED IN R6 + C3 R5 R9 R14 GREEN OUT CUT OFF R13 BLUE IN +VS R1 BLUE OUT + C1 R1 R2 R3 R4 R5 R6 R7 R8 6/11 = 10Ω = 220Ω = 68kΩ = 68kΩ = 68kΩ = 3kΩ = 3kΩ = 3kΩ 1/2W 1/2W 1/2W 1/2W R9 = 47kΩ R10 = 1.8kΩ R11 = 1.8kΩ R12 = 1.8kΩ R13 = 1kΩ R14 = 1kΩ R15 = 1kΩ R16 = 2.2kΩ 1/2W 1/2W 1/2W 1/2W 1/2W 1/2W C1 = 4µF 16V C2 = 100nF 250V C3 = 10µF 16V 8153-05.TIF / 8153-06.EPS GND R11 1.8kΩ R12 1.8kΩ R5 68kΩ 1/2W C11 100pF 7 9 14 1 2 13 15 8153-07.EPS GND 12 R10 1.8kΩ R4 68kΩ 1/2W C10 100pF 3 CUT-OFF R8 2.2kΩ R9 680Ω R3 68kΩ 1/2W C9 100pF 6 C8 22pF R7 2.2kΩ P2 C14 68pF C7 22pF C13 39pF R6 2.2kΩ P1 C2 0.1µF C6 22pF C1 47µF 16V C12 68pF R1 10Ω R2 220Ω-1W R IN G IN B IN +VS +VHT 10 11 C4 10µF 16V 8 4 3 15 13 5 R17 0.1Ω 2W R15 1kΩ-1/2W R14 1kΩ-1/2W R13 1kΩ-1/2W R16 2.2kΩ C3 0.1µF 250V HG R18 10kΩ 2W G2 G1 C5 2.2nF 1kV G3 EHT TDA8153 APPLICATION CIRCUIT 7/11 TDA8153 APPLICATION CIRCUIT GND +VHT C1 F R17 C2 + R14 +VS R1 GND BLUE IN R13 C11 GND CUT OFF C12 RED IN P1 C7 C4 R7 + R10 C14 R11 C10 R12 C3 R9 R6 R18 C9 C6 P2 R15 C5 G2 R16 C13 R2 8/11 GREEN IN 8153-08.TIF / 8153-09.EPS R3 C9 TDA8153 Figure 1 : Video Bandwith G(dB) +1 0 VO = 80 V PP -1 VOBL = 125V -2 -3 -4 -5 -6 -8 f(MHz) 1M 10M Figure 2 : Fall Time Figure 3 : Rise Time 90% 90% 50 ns/div. ; uncal 8153-11.EPS 10% 50 ns/div. ; uncal 10% 8153-12.EPS -9 100k 8153-10.EPS -7 APPLICATION NOTES P. C. Board The best performance of the RGB video amplifier can be obtained only with a carefully designed P.C. board. The layout of the printed circuit must be realized to achieve the best possible symmetry of the three channels. Output to input capacitances are of particular importance. The input-output capacitances, in parallel with the relative high feedback resistances, create poles in the closed loop transfer function. To optimize the band response and to minimize the channels crosstalk a low parasitic capacitance feedback resistors of not inductive type is necessary. Capacitive coupling from the output of an amplifier and the input of another one may induce excessive crosstalk. It is advisable to keep the amplifier outputs away from amplifier inputs. The small size of the P.C. board allows you to mount the TDA8153 directly beside the picture tube socket, to minimize the capacitances of the connections between the video amplifiers and the picture tube cathodes. The capacitors connected in parallel with the input resistors compensate the effects of the distributed constants of the printed circuit on the step response times. Their values must be selected on the basis of the layout and can be considered as function of the printed circuit. The three capacitors (C9, C10, C11) between the amplifier outputs and the feedback resistors reduces the noise effect on the cut-off control, their value, of course, depends on the noise amplitude and spectrum coming from the I.F. video stage. To prevent possible oscillation problems, it is necessary to place the high voltage filter capacitor (C3) as near as possible to the IC ground and the latter must be of a substantial width. 9/11 TDA8153 Power Dissipation Taking as reference the IC internal schematic diagram we can calculate the power dissipated by the video amplifiers. The power dissipation of the IC is defined by a static an a dynamic part. The statically dissipated power is given by : Vobl2 Vht − Vobl Vobl (Vref + 2V be)2 + PS = 3 Vht −3 −3 Rf Rf Rb R1 Where Rf is the feedback resistance and Rb the input to ground resistance with a black level Vobl = 150V, Vht = 200V, Rf = 68kΩ and Rb = 1.8kΩ we have : PS = 1.75W The dynamic power dissipation has been calculated with a 5MHz, 80Vpp sinusoidal output signal and a load capacitor CL = 10pF with the following expression : white noise output signal with a black level Vob1 = 125V, the total power dissipated by the IC can be measured. It results about PT = 4.8W. With a maximum ambient temperature of 70°C and a junction temperature of 150°C a 15°C/W heatsink is required. Figure 4 : Maximum Allowable Power Dissipation versus Ambient Temperature The value is reduced by 20% (0.8 factor) because during the flyback time there is not signal. The total power dissipated by the IC is therefore : PT = PS + Pd = 1.75 + 1.90 = 3.65W One of the worst working condition of the TV set as regards the power dissipation, is when you get white noise on the screen, for example, when you disconnect the TV aerial or the channels are not properly tuned. In these cases if we set the TV receiver for 80VPP 8153-13.EPS Vop2 Pd = 0.8 Vht (2f CL Vop) − 0.8 = 1.90W 2Rf 8153-14.EPS / 8153-15.EPS Figure 5 : Mounting Examples 10/11 TDA8153 PMMUL15V.EPS PACKAGE MECHANICAL DATA: 15 PINS - PLASTIC MULTIWATT A B C D E F G G1 H1 H2 L L1 L2 L3 L4 L7 M M1 S S1 Dia. 1 Min. Millimeters Typ. Max. 5 2.65 1.6 Min. 0.55 0.75 1.4 17.91 0.019 0.026 0.045 0.692 0.772 1 0.49 0.66 1.14 17.57 19.6 22.1 22 17.65 17.25 10.3 2.65 4.2 4.5 1.9 1.9 3.65 1.27 17.78 17.5 10.7 4.3 5.08 Inches Typ. Max. 0.197 0.104 0.063 0.039 20.2 22.6 22.5 18.1 17.75 10.9 2.9 4.6 5.3 2.6 2.6 3.85 0.870 0.866 0.695 0.679 0.406 0.104 0.165 0.177 0.075 0.075 0.144 0.050 0.700 0.689 0.421 0.169 0.200 0.022 0.030 0.055 0.705 0.795 0.890 0.886 0.713 0.699 0.429 0.114 0.181 0.209 0.102 0.102 0.152 MUL15V.TBL Dimensions Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 1994 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 11/11