Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
TDA9556 Datasheet(PDF) 8 Page - STMicroelectronics |
|
TDA9556 Datasheet(HTML) 8 Page - STMicroelectronics |
8 / 15 page TDA9556 8/16 6.3 - Amplifier gain and cut-off adjustment A very simplified schematic of each TDA9556 channel is shown in Figure 3. The feedback net of each channel is integrated with a built-in voltage gain of 19.3 (40k/2k). The output voltage VOUT is given by the following formula: VOUT = (VG+1) x VREF - (VG x VIN) for VG = 19.3 and VREF = 5.5V, we have VOUT = 111.6 - 19.3 x VIN Figure 3. Simplified schematic of one channel 7 ARCING PROTECTION As the amplifier outputs are connected to the CRT cathodes, special attention must be given to por- tect them against possible arcing inside the CRT. Protection must be considered when starting the design of the video CRT board. It should always be implemented before starting to adjust the dy- namic video response of the system. The arcing network that we recommend (see Figure 4) provides efficient protection without de- teriorating the amplifier video performances. The total resistance value between the amplifier and the CRT cathode (R10+R11) should not be less than 300 Ω. Spark gap diodes are strongly recommended for protection against arcing. Figure 4. Arcing protection network (one channel) 2k 40k GND VDD OUT IN VREF + - R11 R29 10 Ω 150 Ω/0.5W C18 100nF C24 4.7 µF/150V C12 100nF/250V R19 33 Ω R10 150 Ω/0.5W L1 0.39 µH D12 FDH400 F1 TDA9556 High Voltage (90-110V) VDD GND OUT Spark gap (*) (*): To be connected as close as possible to the device. |
Número de pieza similar - TDA9556 |
|
Descripción similar - TDA9556 |
|
|
Enlace URL |
Política de Privacidad |
ALLDATASHEET.ES |
¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |