TL3843D-8

Frequency - Switching:	Up to 500kHz
Base Part Number:	TL3843
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	97%
Series:	--
Voltage - Supply (Vcc/Vdd):	7.6 V ~ 30 V
Output Phases:	1
Number of Outputs:	1
Topology:	Boost, Flyback, Forward
Output Configuration:	Positive
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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TL3843D-8 Application Field and Working Principle

The TL3843D-8 is a monolithic integrated circuit that can be used as a DC/DC converter controller. It is usually used in the voltage regulators and DC/DC switching controllers application fields, where it consists of a switching regulator controller, high- and low- power MOSFET’s and a filter capacitor. This kind of circuit requires external components in order to generate the output voltage and current which is adjustable by the user. The TL3843D-8 is designed with synchronous rectification and high efficiency, so it can be configured to provide fast transient response and low noise at higher frequency. The operating temperature range of this circuit is wide, from -40°C to 85°C. The power dissipation of this circuit is about 510mW at 25°C. Also, the required frequency for the output voltage is between 30 KHz to 150 KHz. The main purpose of using this IC is to regulate the output voltage when the input voltage drops or rises significantly. This will prevent any damage to the equipment and will allow the system to stay within its specified range of operation. In terms of its working principle, the TL3843D-8 consists of a frequency compensation network, a constant (or variable) frequency oscillator, an error amplifier and two power MOSFETS. The oscillator produces a frequency chosen by the user and this is then used to control the output voltage. The error amplifier compares the output voltage with the reference voltage and adjusts the output voltage accordingly. The two power MOSFETs are used to switch the current and voltage to the load. This allows the current and voltage to be regulated in a precise manner. The TL3843D-8 is a DC-DC switching controller, so it can be used to convert the DC voltage from one voltage level to another voltage level. The output voltage is adjustable and can be set by the user. The TL3843D-8 is used in many applications such as DC/DC converters, switching regulators, power supplies and switching power supplies. It is also used in power inverters, UPS systems and other equipment with the purpose of regulating the output voltage. In conclusion, because of its various features, the TL3843D-8 is widely used in many applications in the voltage regulators and DC/DC switching controllers fields. It has proven to be reliable, power-efficient and cost-effective, making it a perfect choice for many users.

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