
January 1999 TOKO, Inc.
Page 1
TK75050
GND
PGND/CS
GND
INPUT
GND
GND
VCC
OUTPUT
1.0/0.9 V
INPUT
VCC
THERMAL
GND
PGND/CS
OUTPUT
155/80
°
C
CURRENT
OVERLOAD
R
S
Q
Q
S
R
BIAS
11/10 V
UVLO
STARTUP
EN
EN
1.6/1.0 V
T
FEATURES
I
20 ns Rise and Fall Times into 1000 pF
I
550
μ
A Standby Current Consumption
I
Undervoltage Lockout Combined with First Pulse
Wake-Up Feature *
I
Cycle-by-Cycle Current Limiting
I
Current Sense Voltage Spike Cancellation when
Used with Gate Charge Recovery Circuit *
I
Thermal Overload Protection
I
TTL/CMOS Compatible Input
APPLICATIONS
I
Driving of Power MOSFETs and IGBTs
I
Switch Mode Power Supplies
I
Step Motor Drivers
I
Solenoid Drivers
BLOCK DIAGRAM
TK75050
DESCRIPTION
The TK75050 is a non-inverting buffer to drive high power
insulated gate transistors (e.g., MOSFETs and IGBTs).
The output can source or sink 2 A into a 10,000 pF
equivalent load. The IC features built-in cycle-by-cycle
current limiting. Its Undervoltage Lockout (UVLO) circuit is
combined with a First Pulse Wake-up Feature*. The chip
has thermal overload protection. Using the IC in the Gate
Charge Recovery* application, the switching spike
developed across the current sense resistor practically
becomes negligible. Due to its low standby current and
first-pulse wake-up feature, the device can be used in self-
biased power supplies. The IC's high-speed cycle-by-
cycle current limiting capability eliminates the short circuit
runaway problem which characterizes most current-
controlled converters. The IC is well suited to provide
supplementary overload protection in voltage-controlled
converters, too. The TK75050 is available in the widely
used 8-pin DIP package.
*Toko proprietary feature: See "Application Information" section.
ORDERING INFORMATION
TAPE/REEL CODE
TL: Tape Left
Tape/Reel Code
TK75050D
Temperature Code
PACKAGE CODE
D: DIP-8
EXTENDED TEMP. RANGE
I: -40 TO +85 C
75050
SMART MOSFET DRIVER