LM34915TL/NOPB

Voltage - Output (Min/Fixed):	--
Base Part Number:	LM34915
Supplier Device Package:	--
Package / Case:	--
Mounting Type:	Surface Mount
Operating Temperature:	--
Synchronous Rectifier:	--
Frequency - Switching:	--
Current - Output:	1.25A
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	33V
Voltage - Input (Min):	8V
Number of Outputs:	1
Output Type:	--
Topology:	Buck
Output Configuration:	--
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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LM34915TL/NOPB Application Field And Working Principle

The LM34915TL/NOPB is a type of DC-DC switching regulator typically found in a number of different applications. It is a low side-drive switching regulator that is able to output a fixed nominal output voltage under a wide range of input voltages. This makes it a great choice for applications such as automotive interior lighting, TVs and LCDs, laptops, and other applications requiring a tightly regulated output voltage. In addition to its wide range of application fields, the LM34915TL/NOPB is also noted for its high efficiency, low quiescent current, and low output noise.

The working principle of the LM34915TL/NOPB controller is based on a two-switch forward converter topology. It utilizes a full-bridge arrangement, which consists of two independent control switches, an inductor and two capacitors. The voltage waveforms at the input and output pins are alternating, creating a waveform that is a combination of a square wave, half wave and full wave. As electric current flows through the inductor during the charge cycle, a voltage wave is created across it that is proportional to the input voltage. The frequency of the wave is determined by the interaction between the inductor, capacitor and power MOSFET switches. This waveform is then applied to the feedback node of the switching regulator, which is used to control the output voltage.

The LM34915TL/NOPB operates in a two-level regulation mode. During the charge period the inductor will store energy and will deliver it to the output capacitor during the discharge period. The output voltage is regulated by maintaining the voltage difference between the output capacitor and the feedback node. This can be done by either increasing or decreasing the on-time of the power switches. The on-time of the switches is determined by the error amplifier, which monitors the output voltage and adjusts the switch duty cycle in order to maintain a constant output voltage. In addition, the LM34915TL/NOPB has several other features such as under-voltage lockout, over-voltage protection, current sense and thermal shutdown that makes it suitable for many different applications.

In conclusion, the LM34915TL/NOPB is a highly efficient and versatile DC-DC switching regulator that is suitable for a wide range of applications. It is capable of providing a regulated voltage output across a wide range of input voltages and is further enhanced by a number of features such as over-voltage protection, undervoltage lockout, current sense and thermal shutdown. Its two-level regulation also makes it a great choice for applications requiring tightly regulated output voltages. All of these factors make the LM34915TL/NOPB an excellent choice for all types of DC-DC switching regulator applications.

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