CAN ALSO BE PROGRAMMED FOR CURRENT MODE AND VOLTAGE MODE
Analog IC - Other Type:
POWER FACTOR CONTROLLER WITH POST REGULATOR
Control Mode:
CURRENT-MODE
Control Technique:
PULSE WIDTH MODULATION
Input Voltage-Max:
18 V
Input Voltage-Min:
10.3 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:
1.2 A
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):
4 mA
Supply Voltage-Max (Vsup):
18 V
Supply Voltage-Nom (Vsup):
12 V
Surface Mount:
YES
Switcher Configuration:
BOOST
Switching Frequency-Max:
200 kHz
Technology:
BICMOS
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
UCC38502DW Frequently Asked Questions (FAQs)
Texas Instruments provides a recommended PCB layout in the application note SLUA433, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize electromagnetic interference (EMI).
The transformer selection depends on the specific application requirements, such as output voltage, current, and power level. Texas Instruments provides a transformer selection guide in the application note SLUA435, which includes guidelines for selecting the right transformer and calculating the transformer's turns ratio, inductance, and core size.
The UCC38502DW has an operating temperature range of -40°C to 125°C, but the maximum junction temperature (TJ) should not exceed 150°C. It's essential to ensure proper thermal management and heat sinking to prevent overheating and ensure reliable operation.
The UCC38502DW has built-in OVP and UVP features, but they require external resistors and capacitors to set the threshold voltages. The application note SLUA434 provides a detailed guide on how to implement OVP and UVP using the UCC38502DW.
The recommended input capacitor value and type depend on the specific application requirements, such as input voltage, current, and ripple rejection. A general guideline is to use a low-ESR ceramic capacitor with a value of 10uF to 22uF, but it's essential to consult the datasheet and application notes for specific recommendations.
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UCC38502DW 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.
