UCC28C41DR ,BiCMOS Low-Power Current Mode PWM ControllerFeaturesfrequency, peak current-mode power supplies, this1• Enhanced Replacement for UCx84x andfami ..
UCC28C41P , BICMOS LOW POWER CURRENT MODE PWM CONTROLLER
UCC28C42D ,BiCMOS Low Current 8 Pin PWM Current Mode ControllerBlock Diagram... 1213 Mechanical, Packaging, and Orderable8.3 Feature Description.... 12Information ..
UCC28C42DGK ,BiCMOS Low Current 8 Pin PWM Current Mode ControllerMaximum Ratings(1)(2)over operating free-air temperature range (unless otherwise noted)MIN MAX UNIT ..
UCC28C42DGKR ,BiCMOS Low Current 8 Pin PWM Current Mode Controller SLUS458G–JULY 2000–REVISED JANUARY 20175 Device Comparison TableUVLOMAXIMUMTURN ON AT 14.5 V TURN ..
UCC28C42DR ,BiCMOS Low Current 8 Pin PWM Current Mode Controllerfeatures a• Rail-to-Rail Output Swings with 25-ns Rise andfast current-sense-to-output delay time o ..
UPA1813 ,P-CHANNEL MOS FIELD EFFECT TRANSISTOR FOR SWITCHING
UPA1814 ,P-CHANNEL MOS FIELD EFFECT TRANSISTOR FOR SWITCHING
UPA1814GR-9JG-E1 ,Pch enhancement type MOS FET
UPA1815 ,P-CHANNEL MOS FIELD EFFECT TRANSISTOR FOR SWITCHING
UPA1820GR-9JG-E1 ,N Channel enhancement MOS FET
UPA1840 ,N-CHANNEL MOS FIELD EFFECT TRANSISTOR FOR SWITCHING
UCC28C41D-UCC28C41DGK-UCC28C41DGKR-UCC28C41DGKRG4-UCC28C41DR
BiCMOS Low-Power Current Mode PWM Controller
VIN
UCC28C43
VDD
VREF
RT/CT
GND COMP
OUT
VOUT
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UCC28C40, UCC28C41, UCC28C42, UCC28C43, UCC28C44, UCC28C45
UCC38C40, UCC38C41, UCC38C42, UCC38C43, UCC38C44, UCC38C45SLUS458G –JULY 2000–REVISED JANUARY 2017
UCCx8C4x BiCMOS Low-Power Current-Mode PWM Controller Features Enhanced Replacement for UCx84x and
UCx84xA Family With Pin-to-Pin Compatibility 1-MHz Operation 50-µA Standby Current, 100-µA Maximum Low Operating Currentof 2.3 mAat52 kHz Fast 35-ns Cycle-by-Cycle Over-Current Limiting ±1-A Peak Output Current Rail-to-Rail Output Swings with 25-ns Rise and
20-ns Fall Times ±1% Initial Trimmed 2.5-V Error Amplifier
Reference Trimmed Oscillator Discharge Current New Undervoltage Lockout Versions VSSOP-8 Package Minimizes Board Space
Applications Switch-Mode Power Supplies General Purpose DC-DCor Off-Line Isolated
Power Converters Board Mount Power Modules
DescriptionUCCx8C4x family are high-performance, current-
mode PWM controllers. The UCCx8C4x is an
enhanced BiCMOS version with pin-for-pin
compatibilityto the industry standard UCx84xA family
and UCx84x familyof PWM controllers. The BiCMOS
technology offers lower power consumption to
improve efficiencyas wellas faster current sense and
oscillator frequency.In addition, lower startup voltage
versions of7V are offered as UCCx8C40 and
UCCx8C41 for use in battery systems. The
UCC28C4x seriesis specified for operation from
–40°C to 105°C, and the UCC38C4x series is
specified for operation from 0°Cto 70°C.
Providing necessary features to control fixed
frequency, peak current-mode power supplies, this
family offers the following performance advantages.
The device offers high-frequency operation upto1
MHz, suitable for high speed applications. The
trimmed discharge current enables more precise
programmingof the maximum duty cycle and dead-
time limit when compared to the UCx84x family.
Reduced start-up and operating currents minimizes
start-up loss and low operating power consumption
for improved efficiency. The device also featuresa
fast current-sense-to-output delay timeof 35 ns for
superior overload protectionat the power switch, and ±1-A peak output current capability with improved
rise and fall times for driving large external MOSFETs
directly.
The UCC38C4x familyis offeredin 8-pin VSSOP
(DGK), 8-pin SOIC (D), and 8-pin PDIP (P) packages.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Simplified Schematic
