|
|
Número de pieza | SC1214 | |
Descripción | High Speed - Combi-Sense Two-Phase - Synchronous MOSFET Driver | |
Fabricantes | Semtech | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de SC1214 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
No Preview Available ! POWER MANAGEMENT
SC1214
High Speed, Combi-SenseTM
Two-Phase, SynchronouwswwM.DaOtaSShFeEet4TU.Dcormiver
Description
Features
The SC1214 is a high speed, Combi-SenseTM, two-phase
driver designed to drive high-side and low-side MOSFETs
in two synchronous Buck converters. The driver com-
bined with Combi-Sense PWM controllers, such as
Semtech SC2643VX or SC2643, provides a cost effec-
tive two-phase voltage regulator for advanced micro-
processors
The Combi-SenseTM is a technique to sense the inductor
current for peak current mode control of voltage regula-
tor without using sensing resistor. It provides the follow-
ing advantages:
- No costly precision sensing resistor
- Lossless current sensing
- High level noise free signal
- Fast response
- Suitable for wide range of duty cycle
The detailed explanation of the technique can be found
in the Applications Information section.
u High efficiency
u +12V gate drive voltage
u High peak drive current
u Adaptive non-overlapping gate drives provide
shoot-through protection
u Support Combi-SenseTM and VID-on-fly operations
u Fast rise and fall times (15ns typical with 3000pf
load)
u Ultra-low (<30ns) propagation delay (BG going low)
u Floating top gate drive
u Crowbar function for over voltage protection
u High frequency (to 1.5 MHz) operation allows use
of small inductors and low cost ceramic capacitors
u Under-voltage-lockout
u Low quiescent current
A 30ns max propagation delay from input transition to
the gate of the power FET’s guarantees operation at high
switching frequencies. Internal overlap protection circuit
prevents shoot-through from Vin to PGND in the main
and synchronous MOSFETs. The adaptive overlap pro-
tection circuit ensures the bottom FET does not turn on
until the top FET source has reached 1V, to prevent cross-
conduction.
Applications
u Intel Pentium® processor power supplies
u AMD AthlonTM and AMD-K8TM processor power
supplies
u High current low voltage DC-DC converters
High current drive capability allows fast switching, thus
reducing switching losses at high (up to 1.5MHz) frequen-
cies without causing thermal stress on the driver.
Under-voltage-lockout and over-temperature shutdown
features are included for proper and safe operation.
Timed latches and improved robustness are built into
the housekeeping functions such as the Under Voltage
Lockout and adaptive Shoot-through protection circuitry
to prevent false triggering and to assure safe operation.
The SC1214 is offered in a TSSOP-20 package.
May 9, 2005
1 www.semtech.com
1 page POWER MANAGEMENT
Timing Diagrams
CO
DRN
TG
tPDH_TG tR_TG
BG 1.4V
tPDL_BG tF_BG
Rising Edge Transition
SC1214
www.DataSheet4U.com
1.0V
tPDL_TG tF_TG
tPDH_BG tR_BG
Falling Edge Transition
2005 Semtech Corp.
5
www.semtech.com
5 Page |
Páginas | Total 8 Páginas | |
PDF Descargar | [ Datasheet SC1214.PDF ] |
Número de pieza | Descripción | Fabricantes |
SC1210 | High Speed- 12V/ Synchronous Power MOSFET Driver | Semtech |
SC1211 | Combi-SenseTM Synchronous MOSFET Driver | Semtech Corporation |
SC1211VX | High Speed - Combi-Sense - Synchronous MOSFET Driver for Mobile Applications | Semtech |
SC1214 | High Speed - Combi-Sense Two-Phase - Synchronous MOSFET Driver | Semtech |
Número de pieza | Descripción | Fabricantes |
SLA6805M | High Voltage 3 phase Motor Driver IC. |
Sanken |
SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |