Datenblatt-Suchmaschine für elektronische Bauteile |
|
MC78T12 Datenblatt(PDF) 6 Page - ON Semiconductor |
|
MC78T12 Datenblatt(HTML) 6 Page - ON Semiconductor |
6 / 12 page MC78T00 Series 6 MOTOROLA ANALOG IC DEVICE DATA VOLTAGE REGULATOR PERFORMANCE The performance of a voltage regulator is specified by its immunity to changes in load, input voltage, power dissipation, and temperature. Line and load regulation are tested with a pulse of short duration (< 100 µs) and are strictly a function of electrical gain. However, pulse widths of longer duration (> 1.0 ms) are sufficient to affect temperature gradients across the die. These temperature gradients can cause a change in the output voltage, in addition to changes caused by line and load regulation. Longer pulse widths and thermal gradients make it desirable to specify thermal regulation. Thermal regulation is defined as the change in output voltage caused by a change in dissipated power for a specified time, and is expressed as a percentage output voltage change per watt. The change in dissipated power can be caused by a change in either the input voltage or the load current. Thermal regulation is a function of IC layout and die attach techniques, and usually occurs within 10 ms of a change in power dissipation. After 10 ms, additional changes in the output voltage are due to the temperature coefficient of the device. Figure 1 shows the line and thermal regulation response of a typical MC78T05AC to a 20 W input pulse. The variation of the output voltage due to line regulation is labeled and the thermal regulation component is labeled . Figure 2 shows the load and thermal regulation response of a typical MC78T05AC to a 20 W load pulse. The output voltage variation due to load regulation is labeled and the thermal regulation component is labeled . 2 1 2 1 Figure 1. MC78T05AC Line and Thermal Regulation Figure 2. MC78T05AC Load and Thermal Regulation Vout = 5.0 V Vin = 15 Iout = 0 A → 2.0 A → 0 A t, TIME (2.0 ms/DIV) 1 2 2.0 0 Vout = 5.0 V Vin = 8.0 V → 18 V → 8.0 V Iout = 2.0 A = Regline = 2.4 mV t, TIME (2.0 ms/DIV) 1 2 18 8.0 2 2 = Regtherm = 0.0015%VO/W = Regline = 4.4 mV = Regtherm = 0.0015%VO/W Representative Schematic Diagram Q1 Q2 Q4 Q5 Q8 Q9 Q10 Q12 Q13 Q6 Q7 Q11 5.0 VO Q14 Q15 Q17 Q18 Q16 Q20 Q19 Q23 Q22 Q24 Q21 Q25 Q26 Q27 Q3 1.0k 210 Input 16k 6.7V 300 1.0k 100 200 3.6k 6.4k 520 3.0k 5.6k 10pF 300 13 0.12 Output 200 50 2.6k 6.0k 40 pF Gnd 2.8k 3.9k 2.0k 6.0k 1.0k 8.0–15 VO |
Ähnliche Teilenummer - MC78T12 |
|
Ähnliche Beschreibung - MC78T12 |
|
|
Link URL |
Privatsphäre und Datenschutz |
ALLDATASHEETDE.COM |
War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Linktausch | Hersteller 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 |