UCC2813DTR-4 Datasheet, PDF (1/8 Pages) Texas Instruments – Low Power Economy BiCMOS Current Mode PWM

UCC2813-0/-1/-2/-3/-4/-5
UCC3813-0/-1/-2/-3/-4/-5
Low Power Economy BiCMOS Current Mode PWM
FEATURES
100µA Typical Starting Supply Current
500µA Typical Operating Supply Current
Operation to 1MHz
DESCRIPTION
The UCC3813-0/-1/-2/-3/-4/-5 family of high-speed, low-power inte-
grated circuits contain all of the control and drive components required
for off-line and DC-to-DC fixed frequency current-mode switching power
supplies with minimal parts count.
Internal Soft Start
Internal Fault Soft Start
These devices have the same pin configuration as the UC3842/3/4/5
family, and also offer the added features of internal full-cycle soft start
and internal leading-edge blanking of the current-sense input.
Internal Leading-Edge Blanking of the
Current Sense Signal
1 Amp Totem-Pole Output
70ns Typical Response from
Current-Sense to Gate Drive Output
The UCC3813-0/-1/-2/-3/-4/-5 family offers a variety of package options,
temperature range options, choice of maximum duty cycle, and choice
of critical voltage levels. Lower reference parts such as the UCC3813-3
and UCC3813-5 fit best into battery operated systems, while the higher
reference and the higher UVLO hysteresis of the UCC3813-2 and
UCC3813-4 make these ideal choices for use in off-line power supplies.
1.5% Tolerance Voltage Reference
Same Pinout as UCC3802, UC3842, and
UC3842A
The UCC2813-x series is specified for operation from –40°C to +85°C
and the UCC3813-x series is specified for operation from 0°C to +70°C.
ORDERING INFORMATION
Part Number
UCCx813-0
UCCx813-1
UCCx813-2
UCCx813-3
UCCx813-4
UCCx813-5
Maximum Duty Cycle
100%
50%
100%
100%
50%
50%
Reference Voltage
5V
5V
5V
4V
5V
4V
Turn-On Threshold
7.2V
9.4V
12.5V
4.1V
12.5V
4.1V
Turn-Off Threshold
6.9V
7.4V
8.3V
3.6V
8.3V
3.6V
BLOCK DIAGRAM
04/99
UDG-96134