Texas Instruments TPS2834, TPS2835 Synchronous-Buck Mosfet Drivers with Deadtime Control Data Sheet

查询TPS2834供应商 TPS2834, TPS2835

SYNCHRONOUS-BUCK MOSFET DRIVERS

WITH DEADTIME CONTROL

SLVS223 – NOVEMBER 1999

Floating Bootstrap or Ground-Reference D OR PWP PACKAGE (TOP VIEW)

High-Side Driver Active Deadtime Control

ENABLE BOOT

50-ns Max Rise/Fall Times With 3.3-n F Load IN NC

CROWBAR HIGHDR

2-A Min Peak Output Current

NC BOOTLO

4.5-V to 15-V Supply Voltage Range

SYNC LOWDR

TTL-Compatible Inputs DT NC

Internal Schottky Bootstrap Diode PGND VCC

SYNC Control for Synchronous or

NC – No internal connection

Nonsynchronous Operation CROWBAR for OVP, Protects Against Faulted High-Side Power FETs Low Supply Current 3 m A Typ Ideal for High-Current Single- or Multiphase Applications –40°C to 125°C Junction-Temperature Operating Range

description The TPS2834 and TPS2835 are MOSFET drivers for synchronous-buck power stages. These devices are ideal for designing a high-performance power supply using a switching controller that does not include suitable on-chip MOSFET drivers. The drivers are designed to deliver minimum 2-A peak currents into large capacitive loads. The high-side driver can be configured as ground-reference or as floating-bootstrap. An adaptive dead-time control circuit eliminates shoot-through currents through the main power FETs during switching transitions, and provides high efficiency for the buck regulator. The TPS2834 and TPS2835 have additional control functions: ENABLE, SYNC, and CROWBAR. Both high-side and low-side drivers are off when ENABLE is low. The low-side driver is configured as a nonsynchronous-buck driver when SYNC is low. The CROWBAR function turns on the low-side power FET, overriding the IN signal, for overvoltage protection against faulted high-side power FETs. The TPS2834 has a noninverting input, while the TPS2835 has an inverting input. These drivers are available in 14-terminal SOIC and TSSOP packages and operate over a junction temperature range of –40°C to 125°C.

AVAILABLE OPTIONS

PACKAGED DEVICES

TJ SOIC TSSOP

(D) (PWP) TPS2834D TPS2834PWP

–40°C to 125°C

TPS2835D TPS2835PWP

The D and PWP packages are available taped and reeled. Add R suffix to device type (e.g., TPS2834DR)

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Copyright  1999, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

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