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PT3845IFE#PBF Application Field and Working Principle

Name: LT3845IFE#PBF
Brand: Linear Technology/Analog Devices
SKU: LT3845IFE#PBF-ND
Availability: InStock

Introduction

The PT3845IFE#PBF is a high-side power switch integrated circuit (IC) manufactured by Texas Instruments. This PowerSwitch IC combines the high-side power switch and logics to drive it into a single package. The IC’s operating temperature range is -40°C to 85°C and its supply voltage range is 2.0V to 16V. The PT3845IFE#PBF is capable of switching between 2.0A to 6.5A of current across an inductive load.

Application Field and Working Principle

The main application field for the PT3845IFE#PBF is Power Management, with the IC being used as an efficient and cost-effective solution for designing power controllers and converters. Its main purpose is to regulate the power supply for digital systems and other applications that require a stable power source. The PT3845IFE#PBF works on the principle of DC-DC switch control. It uses a pulse width modulation technique to control the voltage output in order to maintain a constant current output. The IC consists of an internal high-side power switch, along with voltage and current sensing circuits and several logic circuits.The IC\'s output voltage is regulated by two different methods: the initial voltage across the primaries (Vin) and the secondary output voltage (Vout). To ensure efficient operation, the input voltage is monitored via the internal voltage sensing circuit, while the output voltage is regulated using the internal current sensing circuit.To adjust the output voltage, an integrated transconductance amplifier is used. The amplifier compares the actual output voltage to a reference voltage and adjusts the gain of the amplifier according to the difference between the voltage levels.The PT3845IFE#PBF also features current limiting capabilities. When the duty cycle of the pulse width modulation rises past a certain point (as determined by the controller), the integrated current limit circuit takes over and reduces the duty cycle to prevent the current from exceeding a preset limit. This feature helps protect the device from current surges.

Conclusion

The PT3845IFE#PBF is a high-side power switch IC that is perfect for designing power controllers and converters. It operates on a DC-DC switch control principle, using a combination of pulse width modulation, voltage sensing and current sensing to regulate the output voltage. The product also features current limiting capabilities, making it a safe and reliable option for a variety of applications.

Allicdata Part #:	LT3845IFE#PBF-ND
Manufacturer Part#:	LT3845IFE#PBF
Price:	$ 0.00
Product Category:	Integrated Circuits (ICs)
Manufacturer:	Linear Technology/Analog Devices
Short Description:	IC REG CTRLR BUCK 16TSSOP
More Detail:	Buck Regulator Positive Output Step-Down DC-DC Co...
DataSheet:	LT3845IFE#PBF Datasheet/PDF
Quantity:	1160

Frequency - Switching:	300kHz
Base Part Number:	LT3845
Supplier Device Package:	16-TSSOP-EP
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Enable, Frequency Control, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	--
Voltage - Supply (Vcc/Vdd):	4 V ~ 60 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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LT3845IFE#PBF-ND

LT3845IFE#PBF

Integrated Circuits (ICs)

PT3845IFE#PBF Application Field and Working Principle

Introduction

Application Field and Working Principle

Conclusion