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Details, datasheet, quote on part number:TPS2831DR
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| Part: | TPS2831DR |
| Category: | Power Management => Power Distribution/Switches => MOSFET Drivers => MOSFET and Power Drivers |
| Description: | ti TPS2831, Inverting Fast Synchronous Buck MOSFET Drivers With Enable |
| Company: | Texas Instruments, Inc. |
| Datasheet: | Download TPS2831DR datasheet File size : 213 kB |
| Request For quote: | Find where to buy TPS2831DR
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Datasheet text preview:
TPS2830, TPS2831 FAST SYNCHRONOUS-BUCK MOSFET DRIVERS WITH DEAD-TIME CONTROL
SLVS196C JANUARY1999 REVISED JANUARY 2001
D D D D D D D D D D D D
Floating Bootstrap or Ground-Reference High-Side Driver Adaptive Dead-Time Control 50-ns Max Rise/Fall Times and 100-ns Max Propagation Delay 3.3-nF Load Ideal for High-Current Single or Multiphase Power Supplies 2.4-A Typical Peak Output Current 4.5-V to 15-V Supply Voltage Range Internal Schottky Bootstrap Diode SYNC Control for Synchronous or Nonsynchronous Operation CROWBAR for OVP, Protects Against Faulted High-Side Power FETs Low Supply Current....3-mA Typical 40°C to 125°C Operating Virtual Junction Temperature Range Available in SOIC and TSSOP PowerPAD Packages
D PACKAGE (TOP VIEW)
ENABLE IN CROWBAR NC SYNC DT PGND
1 2 3 4 5 6 7
14 13 12 11 10 9 8
BOOT NC HIGHDR BOOTLO LOWDR NC VCC
PWP PACKAGE (TOP VIEW)
ENABLE IN CROWBAR NC SYNC DT PGND
1 2 3 4 Thermal Pad 5 6 7
14 13 12 11 10 9 8
BOOT NC HIGHDR BOOTLO LOWDR NC VCC
NC No internal connection
description
The TPS2830 and TPS2831 are MOSFET drivers for synchronous-buck power stages. These devices are ideal for designing a high-performance power supply using switching controllers that do not have MOSFET drivers. The drivers are designed to deliver 2.4-A peak currents into large capacitive loads. The high-side driver can be configured as a ground-reference driver or as a floating bootstrap driver. An adaptive dead-time control circuit eliminates shoot-through currents through the main power FETs during switching transitions, providing higher efficiency for the buck regulator. The TPS2830/31 drivers have additional control functions: ENABLE, SYNC, and CROWBAR. Both drivers are off when ENABLE is low. The driver is configured as a nonsynchronous-buck driver, disabling the low side driver when SYNC is low. The CROWBAR function turns on the low-side power FET, overriding the IN signal, for over-voltage protection against faulted high-side power FETs. The TPS2830 has a noninverting input. The TPS2831 has an inverting input. The TPS2830/31 drivers are available in 14-terminal SOIC and thermally-enhanced TSSOP PowerPAD packages, and operate over a virtual junction temperature range of 40°C to 125°C. Related Synchronous MOSFET Drivers
DEVICE NAME TPS2832 TPS2833 TPS2834 TPS2835 TPS2836 TPS2837 ADDITIONAL FEATURES W/O ENABLE SYNC, and CROWBAR ENABLE, SYNC and CROWBAR ENABLE, SYNC, and CROWBAR SYNC and CROWBAR W/O ENABLE SYNC, and CROWBAR ENABLE, SYNC and CROWBAR CMOS TTL TTL INPUTS Noninverted Inverted Noninverted Inverted Noninverted Inverted
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. PowerPAD is a trademark of 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.
Copyright 2001, Texas Instruments Incorporated
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
1
TPS2830, TPS2831 FAST SYNCHRONOUS-BUCK MOSFET DRIVERS WITH DEAD-TIME CONTROL
SLVS196C JANUARY1999 REVISED JANUARY 2001
AVAILABLE OPTIONS PACKAGED DEVICES TJ 40°C to 125°C SOIC (D) TPS2830D TPS2831D TSSOP (PWP) TPS2830PWP TPS2831PWP
The D and PWP packages are available taped and reeled. Add R suffix to device type (e.g., TPS2830DR)
functional block diagram
8 VCC
14 (TPS2830 Only) 12 11 2 IN
BOOT HIGHDR BOOTLO
(TPS2831 Only)
VCC
10 6 DT ENABLE 1 SYNC CROWBAR 3 5 7
LOWDR PGND
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
TPS2830, TPS2831 FAST SYNCHRONOUS-BUCK MOSFET DRIVERS WITH DEAD-TIME CONTROL
SLVS196C JANUARY1999 REVISED JANUARY 2001
Terminal Functions
TERMINAL NAME BOOT NO. 14 I/O I DESCRIPTION Bootstrap terminal. A ceramic capacitor is connected between BOOT and BOOTLO terminals to develop the floating bootstrap voltage for the high-side MOSFET. The capacitor value is typically between 0.1 µF and 1 µF. A 1-M resistor should be connected across the bootstrap capacitor to provide a discharge path when the driver has been powered down. This terminal connects to the junction of the high-side and low-side MOSFETs. CROWBAR can to be driven by an external OVP circuit to protect against a short across the high-side MOSFET. If CROWBAR is driven low, the low-side driver will be turned on and the high-side driver will be turned off, independent of the status of all other control terminals. Dead-time control terminal. Connect DT to the junction of the high-side and low-side MOSFETs. If ENABLE is low, both drivers are off. Output drive for the high-side power MOSFET Input signal to the MOSFET drivers (noninverting input for the TPS2830; inverting input for the TPS2831). Output drive for the low-side power MOSFET No internal connection Power ground. Connect to the FET power ground I I Synchronous Rectifier Enable terminal. If SYNC is low, the low-side driver is always off; If SYNC is high, the low-side driver provides gate drive to the low-side MOSFET. Input supply. Recommended that a 1-µF capacitor be connected from VCC to PGND.
BOOTLO CROWBAR
11 3
O I
DT ENABLE HIGHDR IN LOWDR NC PGND SYNC VCC
6 1 12 2 10 4, 9, 13 7 5 8
I I O I O
detailed description
low-side driver The low-side driver is designed to drive low Rds(on) N-channel MOSFETs. The current rating of the driver is 2 A, source and sink. high-side driver The high-side driver is designed to drive low Rds(on) N-channel MOSFETs. The current rating of the driver is 2 A, source and sink. The high-side driver can be configured as a GND-reference driver or as a floating bootstrap driver. The internal bootstrap diode is a Schottky, for improved drive efficiency. The maximum voltage that can be applied from BOOT to ground is 30 V. dead-time (DT) control Dead-time control prevents shoot through current from flowing through the main power FETs during switching transitions by controlling the turn-on times of the MOSFET drivers. The high-side driver is not allowed to turn on until the gate drive voltage to the low-side FET is low, and the low-side driver is not allowed to turn on until the voltage at the junction of the power FETs (Vdrain) is low; the DT terminal connects to the junction of the power FETs. ENABLE The ENABLE terminal enables the drivers. When enable is low, the output drivers are low. IN The IN terminal is the input control signal for the drivers. The TPS2830 has a noninverting input; the TPS2831 has an inverting input.
High-level input voltages on ENABLE, SYNC, CROWBAR, IN, and DT must be greater than or equal to 0.7VCC.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
3
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