UC3845BN Integrated Circuits (ICs)

Series:	--
Packaging:	Tube
Part Status:	Active
Output Type:	Transistor Driver
Function:	Step-Up/Step-Down
Output Configuration:	Positive, Isolation Capable
Topology:	Boost, Flyback
Number of Outputs:	1
Output Phases:	1
Voltage - Supply (Vcc/Vdd):	7.6 V ~ 30 V
Frequency - Switching:	250kHz
Duty Cycle (Max):	48%
Synchronous Rectifier:	No
Clock Sync:	No
Serial Interfaces:	--
Control Features:	Frequency Control
Operating Temperature:	-40°C ~ 150°C (TJ)
Package / Case:	8-DIP (0.300", 7.62mm)
Supplier Device Package:	8-Mini DIP
Base Part Number:	UC3845B

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UC3845BN is a high performance pulse width modulation controller. It is widely used in voltage regulator, DC to DC switching controller and other power management integrated circuits.This device features a wide operating input voltage range, low quiescent current, and an adjustable PWM frequency. UC3845BN is suitable for voltage regulation in both single and multi-phase applications, as well as in DC to DC converter applications.Voltage regulation is a critical component in many electronic applications, from consumer electronics to industrial applications. An integrated voltage regulator helps to maintain a constant voltage level, which is necessary for sensitive electronics to function properly. The UC3845BN voltage regulator helps ensure a stable and reliable power supply for sensitive electronics.The UC3845BN is an integrated pulse width modulation controller that operates in either voltage mode or current mode control. In voltage mode control, the output voltage is regulated by controlling the duty cycle of the output signal. In current mode control, the output current is regulated by controlling the duty cycle of the output signal. The PWM frequency is adjustable with the use of an external resistor. The UC3845BN has an internal power MOSFET driver, allowing an external MOSFET to be used as the primary switch in a DC to DC converter application. This integrated driver provides a low switching delay, low quiescent current, and low on-resistance. This makes the UC3845BN suitable for use in power supply applications such as DC to DC converters, voltage regulators, and DC motor control applications.The UC3845BN also features two latched shutdown inputs, enabling the device to be disabled in a very short amount of time. It also has an undervoltage lockout function, protecting the device from voltage surges. It is capable of operating over a wide input voltage range (4.5v~44V). This makes the UC3845BN suitable for applications that require a large input voltage range, such as automotive and portable applications. Finally, the UC3845BN features a temperature compensation circuit, allowing the output voltage to be regulated over a wide temperature range. This helps ensure that the output voltage remains stable over temperature variations, helping to improve the reliability of voltage regulation.In conclusion, the UC3845BN is an integrated pulsed width modulation controller that is suitable for use in voltage and current mode control applications. It features an internal power MOSFET driver, latched shutdown input, undervoltage lockout, wide input voltage range and temperature compensation circuit. These features make the UC3845BN suitable for a variety of applications, including DC to DC converter, voltage regulator and DC motor control applications.

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