поискавой системы для электроныых деталей |
|
TPS2393 датащи(PDF) 7 Page - Texas Instruments |
|
|
TPS2393 датащи(HTML) 7 Page - Texas Instruments |
7 / 31 page TPS2392 TPS2393 SLUS536C − AUGUST 2002 − REVISED AUGUST 2004 www.ti.com 7 PIN ASSIGNMENTS ISENS: Current sense input. An external low-value resistor connected between this pin and −VIN is used to feed back current magnitude information to the TPS2392 and TPS2393. There are two internal device thresholds associated with the voltage at the ISENS pin. During ramp-up of the load’s input capacitance, or during other periods of excessive demand, the HSPM acts to limit this voltage to 40 mV. Whenever the LCA is in current regulation mode, the capacitor at FLTTIME is charged to activate the timer. If, when the LCA is driving to its supply rail, a fast-acting fault such as a short-circuit, causes the ISENS voltage to exceed 100 mV (the overload threshold), the GATE pin is pulled low rapidly, bypassing the fault timer. OVLO: Voltage sense input for supply overvoltage lockout (OVLO) protection. Overvoltage protection can be achieved by applying a divided down sample of the input supply voltage to this pin. In order to turn on gate drive to the external FET, the OVLO pin must be below the 1.4-V typical threshold, while all other input qualifications are met. If the OVLO pin is raised above this threshold, as with increasing supply voltage, the GATE output is pulled low, interrupting the supply to the load. An internal 10- µA pull-up is switched to this pin when the threshold is exceeded, providing a mechanism for setting the amount of OVLO hysteresis along with the trip threshold. PG: Open-drain, active-low indication of load power good condition. The TPS2392 and TPS2393 devices define power good as the voltage at the DRAINSNS pin below the power good threshold, and the voltage at the IRAMP pin being above 5 V. This assures that full programmed sourcing current is available to the load prior to declaring power good, even with very slow current ramp rates. The additional protection prevents potential discharging of the module bulk capacitance during load turn-on. RTN: Positive supply input for the TPS2392 and TPS2393. For negative voltage systems, the supply pin connects directly to the return node of the input power bus. Internal regulators step down the input voltage to generate the various supply levels used by the TPS2392 and TPS2393. UVLO: Voltage sense input for supply uvervoltage lockout (UVLO) protection. Undervoltage protection can be achieved by applying a divided down sample of the input supply voltage to this pin. In order to turn on the gate drive to the external FET, the UVLO pin must be above the 1.4-V typical threshold, while all other input qualifications are met. If the UVLO pin drops below this threshold, as with decreasing supply voltage, the GATE output is pulled low, interrupting the supply to the load. An internal 10- µA pull−up is switched to this pin when the threshold is exceeded, providing a mechanism for setting the amount of UVLO hysteresis along with the trip threshold. For proper operation, a minimum 1500-pF capacitor, connected between the UVLO and −VIN pins, is required. −VIN: Negative supply input and reference pin for the TPS2392 and TPS2393. This pin connects directly to the input supply negative rail. The input and output pins and all internal circuitry are referenced to this pin, so it is essentially the GND or VSS pin of the device. |
Аналогичный номер детали - TPS2393 |
|
Аналогичное описание - TPS2393 |
|
|
ссылки URL |
Конфиденциальность |
ALLDATASHEETRU.COM |
Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | обмен ссыками | поиск по производителю 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 |