UNDER AND OVER-VOLTAGE FAULT ALERT WITH PROGRAMMABLE DELAY
Adjustable Threshold:
NO
Analog IC - Other Type:
UNDER/OVERVOLTAGE SUPERVISOR
JESD-30 Code:
R-PDIP-T16
JESD-609 Code:
e4
Length:
19.305 mm
Number of Channels:
1
Number of Functions:
1
Number of Terminals:
16
Operating Temperature-Max:
85 °C
Operating Temperature-Min:
-40 °C
Package Body Material:
PLASTIC/EPOXY
Package Code:
DIP
Package Shape:
RECTANGULAR
Package Style:
IN-LINE
Qualification Status:
Not Qualified
Seated Height-Max:
5.08 mm
Supply Voltage-Max (Vsup):
35 V
Supply Voltage-Min (Vsup):
5 V
Supply Voltage-Nom (Vsup):
15 V
Surface Mount:
NO
Technology:
BIPOLAR
Temperature Grade:
INDUSTRIAL
Terminal Finish:
Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal Form:
THROUGH-HOLE
Terminal Pitch:
2.54 mm
Terminal Position:
DUAL
Width:
7.62 mm
UC2834N Frequently Asked Questions (FAQs)
The UC2834N 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 output inductor and diode should be placed close to the IC, and the output capacitors should be placed close to the load. A good rule of thumb is to keep the high-current paths short and wide, and to minimize the loop area of the switching node.
The inductor selection depends on the output current, output voltage, and switching frequency. TI recommends using an inductor with a low DC resistance (DCR) and a high saturation current. The inductor value should be chosen to ensure that the peak inductor current is within the recommended range. A good starting point is to use an inductor with a value between 1-10 μH, and then adjust based on the specific application requirements.
The UC2834N has an absolute maximum input voltage rating of 18V, but the recommended operating input voltage range is 7-15V. Exceeding the maximum input voltage can cause damage to the IC. It's essential to ensure that the input voltage is within the recommended range to ensure reliable operation.
The UC2834N requires a compensation network to ensure stability. TI recommends using a type-III compensation network, which consists of resistors and capacitors connected between the COMP pin and the GND pin. The compensation network values depend on the output voltage, output current, and switching frequency. TI provides a compensation calculator tool to help designers determine the correct values for their specific application.
The bootstrap capacitor (CBOOT) is used to generate the gate drive voltage for the internal power MOSFET. The capacitor is charged from the input voltage during the off-time of the switch, and then discharges to drive the gate of the power MOSFET during the on-time. The bootstrap capacitor value should be chosen to ensure that the gate drive voltage is sufficient to fully enhance the power MOSFET.
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UC2834N 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.
