Description
Texas Instruments UCC3804D Switching Controller Single Out 1A 1000 kHz 8-Pin SOIC SMD SOIC-8
The UCC1800/1/2/3/4/5 family of high-speed, low-power integrated 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.
These devices have the same pin configuration as the UC1842/3/4/5 family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.
The UCC1800/1/2/3/4/5 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 UCC1803 and UCC1805 fit best into battery operated systems, while the higher reference and the higher UVLO hysteresis of the UCC1802 and UCC1804 make these ideal choices for use in off-line power supplies.
The UCC180x series is specified for operation from –55°C to +125°C, the UCC280x series is specified for operation from –40°C to +85°C, and the UCC380x series is specified for operation from 0°c to +70°C.
The isolated-flyback power supply controller provides Constant-Voltage (CV) and Constant-Current (CC) output regulation to improve transient response to large load steps. Primary-Side Regulation (PSR) eliminates the need for an Optocoupler.
Specifications
Control Method Current
Dimensions 4.9 x 3.91 x 1.58mm
Fall Time 44ns
Maximum Operating Temperature +70 °C
Minimum Operating Temperature 0 °C
Number of PWM Outputs 1
Output Current 1 A
Package Type SOIC
Pin Count 8
Topology Boost, Buck, Flyback, Forward
Width 3.91mm
Maximum Switching Frequency 1000 kHz
Height 1.58mm
Length 4.9mm
Mounting Type Surface Mount
Rise Time 41ns
Maximum Duty Cycle 50%
Manufacturer Part Number: UCC3804D
Manufacturer: Texas Instruments
