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
UCC38503DWTR 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 selection of the transformer depends on the specific application requirements, such as input voltage, output voltage, and power rating. 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 leakage inductance.
The maximum operating temperature range for UCC38503DWTR is -40°C to 125°C, as specified in the datasheet. However, the device's performance and reliability may be affected at extreme temperatures, and it is recommended to operate the device within a temperature range of 0°C to 100°C for optimal performance.
The UCC38503DWTR has built-in OVP and UVP features, which can be enabled by connecting the OVP and UVP pins to the input voltage and a voltage reference, respectively. The device will automatically shut down if the input voltage exceeds the OVP threshold or falls below the UVP threshold. The application note SLUA434 provides more details on implementing OVP and UVP using UCC38503DWTR.
The recommended input capacitor value and type depend on the specific application requirements, such as input voltage, output voltage, and ripple current. A general guideline is to use a low-ESR ceramic capacitor with a value of 10uF to 22uF, as specified in the datasheet. However, it is recommended to consult the application note SLUA433 for more detailed guidelines on selecting the right input capacitor.
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UCC38503DWTR 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.
