ALSO HAS CONTROL MODE OF IPK, ALSO HAS CONTROL TECHNIQUE OF RESONANT
Analog IC - Other Type:
SWITCHING CONTROLLER
Control Mode:
CURRENT/VOLTAGE-MODE
Control Technique:
PULSE WIDTH MODULATION
Input Voltage-Max:
20 V
Input Voltage-Min:
11 V
Input Voltage-Nom:
12 V
JESD-30 Code:
R-PDSO-G20
JESD-609 Code:
e4
Length:
12.8 mm
Moisture Sensitivity Level:
2
Number of Functions:
1
Number of Terminals:
20
Operating Temperature-Max:
70 °C
Output Current-Max:
0.1 A
Output Voltage-Max:
5.08 V
Output Voltage-Min:
4.92 V
Output Voltage-Nom:
5 V
Package Body Material:
PLASTIC/EPOXY
Package Code:
SOP
Package Equivalence Code:
SOP20,.4
Package Shape:
RECTANGULAR
Package Style:
SMALL OUTLINE
Peak Reflow Temperature (Cel):
260
Qualification Status:
Not Qualified
Seated Height-Max:
2.65 mm
Supply Current-Max (Isup):
35 mA
Surface Mount:
YES
Switcher Configuration:
BUCK-BOOST
Switching Frequency-Max:
300 kHz
Technology:
BIPOLAR
Temperature Grade:
COMMERCIAL
Terminal Finish:
Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal Form:
GULL WING
Terminal Pitch:
1.27 mm
Terminal Position:
DUAL
Time@Peak Reflow Temperature-Max (s):
30
Width:
7.5 mm
UC3879DWG4 Frequently Asked Questions (FAQs)
The UC3879DWG4 is a high-frequency switching regulator, and proper layout and placement are crucial for its operation. TI recommends a 4-layer PCB with a solid ground plane, and the IC should be placed close to the input capacitors. The switching node (SW pin) should be kept away from sensitive nodes, and the output filter components should be placed close to the output pins.
The inductor selection depends on the output voltage, current, and switching frequency. TI recommends using a shielded inductor with a low DC resistance and high saturation current. The inductor value should be chosen to ensure that the peak inductor current is within the recommended range (typically 1.5 to 2.5 times the output current).
The UC3879DWG4 has an absolute maximum input voltage rating of 18V. However, the recommended operating input voltage range is 12V to 15V. Exceeding the maximum input voltage can damage the IC.
The UC3879DWG4 requires a compensation network to ensure stability. TI recommends using a Type II compensation network, which consists of a resistor, capacitor, and resistor (R-C-R) connected between the COMP pin and GND. The values of the compensation components depend on the output voltage, current, and switching frequency.
The bootstrap capacitor (CB) is used to generate the gate drive voltage for the internal power MOSFET. It is charged through the bootstrap diode (DB) during the off-time of the switch. The bootstrap capacitor value should be chosen to ensure that the gate drive voltage is sufficient to fully enhance the power MOSFET.
Trust Checks
This model has been provided by community users.
Community Provided
This model has been verified by system checks.
System Verified
This model has been reviewed by community users.
Community Approved
Sponsored
UC3879DWG4 Overview
Use the download button to access the UC3879DWG4 schematic symbol, PCB footprint, and 3D model.
To find more CAD model downloads similar to this part, try a partial part number search, like UC387,
or try a keyword search, such as Switching Regulator or Controllers
About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
