UCC27423, UCC27424, UCC27425
SLUS545B − NOVEMBER 2002 − REVISED NOVEMBER 2004
DUAL 4 A HIGH SPEED LOW-SIDE MOSFET DRIVERS WITH ENABLE
FEATURES
D
Industry-Standard Pin-Out
D
Enable Functions for Each Driver
D
High Current Drive Capability of
±4
A
D
Unique BiPolar and CMOS True Drive Output
D
D
D
D
D
D
D
Stage Provides High Current at MOSFET
Miller Thresholds
TTL/CMOS Compatible Inputs Independent of
Supply Voltage
20-ns Typical Rise and 15-ns Typical Fall
Times with 1.8-nF Load
Typical Propagation Delay Times of 25 ns with
Input Falling and 35 ns with Input Rising
4-V to 15-V Supply Voltage
Dual Outputs Can Be Paralleled for Higher
Drive Current
Available in Thermally Enhanced MSOP
PowerPAD
TM
Package with 4.7°C/W
θjc
Rated From –40°C to 105°C
DESCRIPTION
The UCC27423/4/5 family of high-speed dual MOSFET
drivers can deliver large peak currents into capacitive
loads.Three standard logic options are offered –
dual-inverting, dual-noninverting and one-inverting and
one-noninverting driver. The thermally enhanced 8-pin
PowerPAD
TM
MSOP package (DGN) drastically lowers
the thermal resistance to improve long-term reliability.
It is also offered in the standard SOIC-8 (D) or PDIP-8
(P) packages.
Using a design that inherently minimizes shoot-through
current, these drivers deliver 4-A of current where it is
needed most at the Miller plateau region during the
MOSFET switching transition. A unique BiPolar and
MOSFET hybrid output stage in parallel also allows
efficient current sourcing and sinking at low supply
voltages.
The UCC27423/4/5 provides enable (ENBL) functions
to have better control of the operation of the driver
applications. ENBA and ENBB are implemented on pins
1 and 8 which were previously left unused in the industry
standard pin-out. They are internally pulled up to Vdd for
active high logic and can be left open for standard
operation.
APPLICATIONS
D
Switch Mode Power Supplies
D
DC/DC Converters
D
Motor Controllers
D
Line Drivers
D
Class D Switching Amplifiers
BLOCK DIAGRAM
8
ENBA 1
INVERTING
ENBB
7
INA 2
VDD
NON−INVERTING
INVERTING
GND 3
5
INB 4
NON−INVERTING
6
OUTA
VDD
OUTB
UDG−01063
PowerPADt is a trademark of Texas Instruments Incorporated.
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.
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
2003, Texas Instruments Incorporated
www.ti.com
1
TI [ TEXAS INSTRUMENTS ]
