Zakładka z wyszukiwarką danych komponentów |
|
TEA2019 Arkusz danych(PDF) 6 Page - STMicroelectronics |
|
TEA2019 Arkusz danych(HTML) 6 Page - STMicroelectronics |
6 / 7 page The TEA2019 has some additional capabilities compared to the TEA2018A : • The oscillator charge current its supplied through an internal current generator,programmed exter- nally - instead of using an external charging resistor. The sawtooth so obtained is linear. • The oscillator can be synchronized through an internal PLL circuit. This feature provides syn- chronization between the external sync pulse and the end of the switching transistor current. The sync pulse can be for example the fly-back pulse of a TV horizontal sweep circuit. As indi- cated in the application diagram, this pulse is applied first to a R.C. network to obtain a low voltage sawtooth and then to pin 7 of the circuit. The PLL output (pin 8) supplies a correction current to pin 9 through an external resistor, so as to maintain the oscillator at the correct fre- quency (refer to application note AN406/0591 for detailed information). • In the TEA2019, the power supply of the positive output stage is separated from the main power supply, so that it can be supplied from a lower voltage in order to reduce the I.C. power dissipa- tion. For low power applications, the circuit can be normally supplied by connecting pins 2 and 3 together. • In order to protect the substrate (pin 13) from the parasitic voltage peaks produced by negative output current peaks at pin 14, the substrate (pin 13) is internally separated from the negative supply (pin 14). They must be externally con- nected together. • The switching transistor saturation voltage can be monitored at pin 4. To achieve this, a high voltage diode must be connected between the collector of the switching transistor and pin 4. Also a resistor must be connected from pin 4 to V + CC (see application diagram). This arrange- ment is useful when the chosen value of base current is very low and as a consequence the saturationvoltage will be high. In this event, when VCE(sat) increases above 2.5V, the base current is interrupted before the normal end of the period. Remark : the TEA2019 can also operate without this protection. 47 µF 385V 0.1 µF 0.1 µF 4 x 1N4007 RF Filter 2 x 12mH 0.5A 1N4148 Primary Ground Secondary Ground TEA2019 Mains Input 7 8 65 910 4 11 3 12 21 13 14 1.5nF 22nF 3.3nF 56k Ω 56k Ω 3.9k Ω 82k Ω 10k Ω 10k Ω 1.8k Ω 47nF 33nF C2 10 µF 18 Ω 10 Ω 10k Ω 470 µF 1N4148 3.9 Ω 120k Ω 1W 3.3 Ω BUV 46A BYT 11-100 BYT11-100 0.47 Ω 4.7 Ω 10 µF BYT11-800 BYT11-800 100 µF 160V 470 µF 40V 120V 0.4A 24V 0.5A 1k Ω 3W 680 Ω 3W 2.2nF 100 Ω 3 x 1N4001 n3 n0 n2 n1 Sync. Pulse TYPICAL APPLICATION . PMAX = 60W . Free-running Frequency : 15kHz . 155VRMS ≤ VAC ≤ 250VRMS . Outputs: 120V ± 3%, 0.4A 24V ±3%, 0.5A . VCE Monitoring TEA2019 6/7 |
Podobny numer części - TEA2019 |
|
Podobny opis - TEA2019 |
|
|
Link URL |
Polityka prywatności |
ALLDATASHEET.PL |
Czy Alldatasheet okazała się pomocna? [ DONATE ] |
O Alldatasheet | Reklama | Kontakt | Polityka prywatności | Linki | Lista producentów 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 |