CAN ALSO BE CONFIGURED IN CURRENT MODE; PWM CONTROL TECHNIQUE ALSO POSSIBLE
Analog IC - Other Type:
SWITCHING CONTROLLER
Control Mode:
CURRENT/VOLTAGE-MODE
Control Technique:
RESONANT CONTROL
Input Voltage-Max:
20 V
Input Voltage-Min:
11 V
Input Voltage-Nom:
12 V
JESD-30 Code:
R-PDSO-G28
JESD-609 Code:
e4
Length:
17.9 mm
Moisture Sensitivity Level:
2
Number of Functions:
1
Number of Terminals:
28
Operating Temperature-Max:
85 °C
Operating Temperature-Min:
-25 °C
Output Current-Max:
3 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:
SOP28,.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):
30 mA
Supply Voltage-Max (Vsup):
29 V
Supply Voltage-Min (Vsup):
10.75 V
Supply Voltage-Nom (Vsup):
12 V
Surface Mount:
YES
Switcher Configuration:
PUSH-PULL
Switching Frequency-Max:
1000 kHz
Technology:
BIPOLAR
Temperature Grade:
OTHER
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
UC2875DWPTR Frequently Asked Questions (FAQs)
A good PCB layout for the UC2875DWPTR involves keeping the high-frequency switching nodes (e.g., pins 1, 2, and 3) away from sensitive analog nodes, using a solid ground plane, and minimizing trace lengths and widths to reduce parasitic inductance and capacitance.
To ensure reliable startup and shutdown, ensure that the input voltage (VIN) is within the recommended range, the output voltage (VOUT) is properly decoupled, and the soft-start capacitor (CSS) is properly sized and connected.
When selecting LO and CO, consider the desired output voltage ripple, inductor core saturation, and capacitor ESR. A good starting point is to use an inductor with a high saturation current and a capacitor with low ESR and high capacitance.
To troubleshoot issues, start by verifying the PCB layout and component selection, then check the input and output voltage waveforms using an oscilloscope. Look for signs of oscillation, ringing, or excessive voltage spikes, and adjust the component values or layout as needed.
The UC2875DWPTR has a maximum junction temperature (TJ) of 150°C. Ensure reliable operation at high temperatures by providing adequate heat sinking, using a thermally conductive PCB material, and keeping the device away from heat sources.
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UC2875DWPTR Overview
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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.
