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:
18 V
Input Voltage-Min:
10.5 V
Input Voltage-Nom:
12 V
JESD-30 Code:
R-GDIP-T20
JESD-609 Code:
e0
Length:
24.195 mm
Number of Functions:
1
Number of Terminals:
20
Operating Temperature-Max:
125 °C
Operating Temperature-Min:
-55 °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:
CERAMIC, GLASS-SEALED
Package Code:
DIP
Package Equivalence Code:
DIP20,.3
Package Shape:
RECTANGULAR
Package Style:
IN-LINE
Qualification Status:
Not Qualified
Screening Level:
MIL-STD-883 Class B
Seated Height-Max:
5.08 mm
Supply Current-Max (Isup):
30 mA
Supply Voltage-Max (Vsup):
18 V
Supply Voltage-Min (Vsup):
10.75 V
Supply Voltage-Nom (Vsup):
12 V
Surface Mount:
NO
Switcher Configuration:
PHASE-SHIFT
Switching Frequency-Max:
1000 kHz
Technology:
BIPOLAR
Temperature Grade:
MILITARY
Terminal Finish:
Tin/Lead (Sn/Pb)
Terminal Form:
THROUGH-HOLE
Terminal Pitch:
2.54 mm
Terminal Position:
DUAL
Width:
7.62 mm
UC1875J883B Frequently Asked Questions (FAQs)
A good PCB layout for the UC1875J883B involves keeping the input and output traces separate, using a solid ground plane, and placing the input and output capacitors close to the IC. Additionally, it's recommended to use a shielded inductor and to keep the switching node (pin 5) away from sensitive analog circuits.
The inductor value and type depend on the output voltage, current, and frequency of the converter. A good starting point is to use the inductor value recommended in the datasheet (e.g., 10uH for the UC1875J883B). For high-current applications, consider using a shielded inductor with a low DCR (DC resistance) and a high saturation current rating.
The UC1875J883B can dissipate up to 2.5W of power, so it's essential to ensure good thermal management. This can be achieved by using a heat sink, placing the IC on a thick copper plane, and keeping the ambient temperature below 70°C. Additionally, consider using a thermal interface material (TIM) to improve heat transfer between the IC and the heat sink.
To ensure stability, follow the recommended component values and PCB layout guidelines in the datasheet. Additionally, make sure to decouple the input and output pins with suitable capacitors, and use a compensation network (e.g., R-C network) to stabilize the feedback loop.
The UC1875J883B is a high-voltage, high-current switch-mode controller with a unique set of features, such as a built-in high-voltage regulator and a low-dropout linear regulator. Compared to other similar ICs, the UC1875J883B offers a higher input voltage range (up to 40V) and a higher output current capability (up to 3A).
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UC1875J883B Overview
Use the download button to access the UC1875J883B schematic symbol and PCB footprint.
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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.
