 |
Zakładka z wyszukiwarką danych komponentów |
|
|
Zakładka z wyszukiwarką danych komponentów |
|
CS5151GN16 Arkusz danych(PDF) 8 Page - Cherry Semiconductor Corporation |
|
||||||||||||||||||||||||||||||
CS5151GN16 Arkusz danych(HTML) 8 Page - Cherry Semiconductor Corporation |
|
|
8 / 14 page  Applications Information: continued 8 If the maximum on time is exceeded while responding to a sudden increase in load current, a normal off time occurs to prevent saturation of the output inductor. Figure 7: CS5151 demonstration board response to a 0.5 to 13A load pulse (output set for 2.8V). Figure 8: CS5151 demonstration board response to 13A load turn on (output set for 2.8V). Upon completing a normal off time, the V2™ con- trol loop immediately connects the inductor to the input voltage, pro- viding 100% duty cycle. Regulation is achieved in less than 20µs. Figure 9: CS5151 demonstration board response to 13A load turn off (output set for 2.8V). V2™ control topology immediately connects inductor to ground, providing 0% duty cycle. Regulation is achieved in less than 10µs. VCC1 Monitor To maintain predictable startup and shutdown characteris- tics an internal VCC1 monitor circuit is used to prevent the part from operating below 3.75V minimum startup. The VCC1 monitor comparator provides hysteresis and guaran- tees a 3.70V minimum shutdown threshold. Short Circuit Protection A lossless hiccup mode short circuit protection feature is provided, requiring only the soft start capacitor to imple- ment. If a short circuit condition occurs (VFFB < 1V), the VFFB low comparator sets the FAULT latch. This causes the MOS- FET to shut off, disconnecting the regulator from its input voltage. The soft start capacitor is then slowly discharged by a 2µA current source until it reaches its lower 0.7V threshold. The regulator will then attempt to restart normally, operating in its extended off time mode with a 50% duty cycle, while the soft start capacitor is charged with a 60µA charge current. If the short circuit condition persists, the regulator output will not achieve the 1V low VFFB comparator threshold before the soft start capacitor is charged to its upper 2.5V threshold. If this happens the cycle will repeat itself until the short is removed. The soft start charge/discharge current ratio sets the duty cycle for the pulses (2µA/60µA = 3.3%), while actual duty cycle is half that due to the extended off time mode (1.65%). This protection feature results in less stress to the regulator Protection and Monitoring Features Trace1 - Regulator Output Voltage (1V/div.) Trace 2 - Inductor Switching Node (5V/div.) Trace 3 - Output Current (13 to 0.5 Amps) (20V/div.) Trace 1 - Regulator Output Voltage (1V/div.) Trace 2 - Inductor Switching Node (5V/div.) Trace 3 - Output Current (0.5 to 13 Amps) (20V/div.) Trace 1 - Regulator Output Voltage (1V/div.) Trace 3 - Regulator Output Current (20V/div.) |
Podobny numer części - CS5151GN16 |
|
Podobny opis - CS5151GN16 |
|
|
|
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 |
Polish ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
