Frequency - Switching:	100kHz
Base Part Number:	TL3845
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):	48%
Series:	Automotive, AEC-Q100
Voltage - Supply (Vcc/Vdd):	7.6 V ~ 30 V
Output Phases:	1
Number of Outputs:	1
Topology:	Boost, Flyback, Forward Converter
Output Configuration:	Positive
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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PMIC - Voltage Regulators - DC DC Switching Controllers

The TL3845D-8 is a high efficiency, low noise DC/DC switching controller designed for use in the field of power management ICs, specifically voltage regulators. It offers a voltage range of 5.5V to 15V and a maximum output current of 8A and integrates a fast current limiting circuit and over temperature protection for improved system stability.The TL3845D-8 is designed for use in a wide range of applications, from powering portable electronic devices, such as smartphones and tablets, to driving DC/DC and AC/DC converters, such as those found in transportation systems, industrial equipment, and renewable energy applications.

Features and Benefits of the TL3845D-8

The TL3845D-8 is an ideal solution for PMIC applications due to its wide operating voltage range, fast current limiting, and over temperature protection features. It also offers low power consumption, excellent thermal performance, and high efficiency, enabling it to meet the demanding requirements of power-constrained, high-density designs.The TL3845D-8 integrates a range of features, including:• High efficiency DC/DC switching control• Enhanced current Limiting and over temperature protection• Low operating current• Fast response to the load changes• Wide operating temperature range ( -40°C to 125°C) • Low Electro-Magnetic Interference (EMI) • Soft start for optimal system startup • Options for current measure This switch mode power supply (SMPS) also incorporates an active current point in the PWM scheme, which provides a more accurate output voltage measurement and allows for more precise control over the output current.

Working Principle

The TL3845D-8 is a fast response switching controller designed for use in voltage regulator applications. Its operation is based on Pulse-width modulation (PWM), a method of electrical power control in which the output is cyclically modulated at a fast switching rate.The TL3845D-8 operates by utilizing an open loop, current limiting and over temperature protection, as well as soft start circuitry. A current limit circuit is included to protect the regulator from an overload, and also to minimize power dissipation. An over temperature protection circuit prevents the device from over-heating, and a soft start circuit is used to gradually bring the output voltage up to its operating point, ensuring that no excessive voltage fluctuations occur while the output voltage is ramping up.When the TL3845D-8 is loaded, the output voltage is monitored and the switching frequency is adjusted to maintain its desired output voltage. The PWM Controller also utilizes a hysteretic control, which actively switches the power supply on and off as needed to achieve a stable output voltage.

Conclusion

The TL3845D-8 is an ideal choice for use in voltage regulator applications due to its wide operating voltage range, fast current limiting, and over temperature protection features. It also offers low power consumption, excellent thermal performance, and high efficiency, which makes it suitable for use in power-constrained, high-density designs. It is designed for use in a variety of applications, from powering portable electronic devices to driving DC/DC and AC/DC converters.

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