LM5035MHX/NOPB

Frequency - Switching:	200kHz, 500kHz
Base Part Number:	LM5035
Supplier Device Package:	20-HTSSOP
Package / Case:	20-PowerTSSOP (0.173", 4.40mm Width)
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Frequency Control, Ramp, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	--
Voltage - Supply (Vcc/Vdd):	13 V ~ 105 V
Output Phases:	1
Number of Outputs:	1
Topology:	Half-Bridge
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to LM5035MHX/NOPB Application Field and Working Principle

The LM5035MHX/NOPB is a family of DC-to-DC switching controllers with excellent performance capabilities that allow them to run regulated switching power supplies using high power conversion rates. It has a wide range of operating input voltage and operating temperature that make it beneficial for applications where there are varying current and temperature imbalances.

Description of DC-DC Switching Controller

A DC-DC switching controller is a type of power electronic circuit that controls the transfer of power from a DC source to a DC load. This kind of circuit is typically used when relatively large loads need to be energized from a conforming power source. The LM5035MHX/NOPB switching controller is suitable for operations that require high power conversion efficiency, smooth power conversion, and a wide operating temperature range. This versatile switching controller offers several advantages which make it useful for various applications, such as high power efficiency, improved thermal performance, and compatibility with distinct machine tolerance profiles. Moreover, it contains several safety features, such as overvoltage protection, over-temperature protection, under-temperature protection, and crowbar protection.

Bridge Control Topology

The LM5035MHX/NOPB utilizes a bridge control topology, which allows the controller to control both the magnitude and the direction of current flow and voltage applied across the load. This topology also enables the use of pulse width modulation (PWM) to deliver the desired output voltage. The controller comprises two inputs: one for the voltage generated from the source and one for the feedback signal from the load. This bridge control allows for a high power conversion rate and flexibility in controlling the power of the load. It allows for the flow of current from any point of the source to any point in the load, thereby allowing for greater control over the parameters of the power.

Operation

The LM5035MHX/NOPB operates on a pulse width modulation (PWM) technique. This technique uses the ratio of on-time and off-time of the pulse width modulation to produce the desired output. The amount of this modulation can be adjusted by the user to vary the magnitude of the output voltage. In the LM5035MHX/NOPB, the reference voltage is applied to the error amplifier, and the dc-link voltage is applied to the sampling comparator. The PWM signal is then generated based on the difference between the feedback signal and the reference signal. The pulse width modulation ratio is then adjusted to control the output-voltage up to a desired value.

Output Control

In addition to the PWM signal, the LM5035MHX/NOPB provides an output control signal that is capable of controlling the output voltage independently from the pulse width modulation signal. This signal can be used to adjust the output voltage or to lower the output current for improved power efficiency. The adjustment of this output control signal is done through an open-loop or closed-loop control system, depending on the application requirements.

Applications

The LM5035MHX/NOPB is suitable for a wide range of applications, such as LED Lighting, LED backlighting, DC-to-DC converters, isolated power supplies, electric motor power supplies, and power management circuits. It is especially suitable for applications in high power, high efficiency, and wide operating temperature ranges.

Conclusion

The LM5035MHX/NOPB is a versatile and highly efficient DC-DC switching controller capable of providing reliable and high-performance power conversion for a wide range of applications. It features bridge control topology, enabling the use of PWM to control the output voltage, an adjustable output control signal to further improve the power efficiency, and a wide operating temperature range. With its excellent performance and characteristics, the LM5035MHX/NOPB is ideal for operating regulated switching power supplies with high power conversion rates.

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