Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
L6377D Datasheet(PDF) 6 Page - STMicroelectronics |
|
L6377D Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 11 page INPUT SECTION An Input and Asynchronous RESET, both TTL/CMOS compatible with wide voltage range and high noise immunity (thanks to a built in hys- teresis) are available. OVER TEMPERATURE PROTECTION (OVT) An on-chip Over Temperature Protection providse an excellent protection of the device in extreme conditions. Whenever the temperature - meas- ured on a central portion of the chip- exceeds Tmax=150 C (typical value) the device is shut off, and the DIAG output goes LOW. Normal operation is resumed as the chip tem- perature (normally after few seconds) falls below Tmax-Thys= 130 C (typical value). The hysteresis avoid thats an intermittent behaviour take place. UNDER VOLTAGE PROTECTION (UV) The supply voltage is expected to range from 8 to 35 V. In this range the device operates correctly. Below 8 V the overall system has to be consid- ered not reliable. To avoid any misfunctioning the supply voltage is continuously monitored to pro- vide an under voltage protection. As Vs falls be- low Vsth-Vshys (typically 7.5 V, see fig.1) the output power MOS is switched off and DIAG out- put goes LOW. Normal operation is resumed as soon as Vs exceeds Vsth. The hysteretic behav- iour prevents intermittent operation at low supply voltage. OVER CURRENT OPERATION In order to implement a short circuit protection the output power MOS is driven in linear mode to limit the output current to the Isc value. This Isc limit is externally settable by means of an external 1/4 W resistor connected from Rsc pin and GND. The value of the resistor must be chosen according to the following formula: Isc (A) = 5/Rsc (kohm) with 5 < Rsc < 30 (kohm) For Rsc < 5 (kohm) Isc is limited to Isc=1.1 A (typical value). This condition (current limited to the Isc value) lasts for a Ton time interval, that can be set by means of a capacitor (Cdon) connected to the ON DELAY pin according to the following formula: Ton = 1.28 msec/pF for 50pF<Cdon< 2nF After the Ton interval has expired the output power MOS is switched off for the Toff time inter- val with: Toff = 64*Ton. OUTPUT CURRENT tON tON tOFF tOFF Time t<tON DIAG (active low) Time Short Circuit Short Circuit Isc Iout D94IN105 Figure 3: Short Circuit Operation Waveforms L6377 6/11 |
Número de pieza similar - L6377D |
|
Descripción similar - L6377D |
|
|
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 |