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See Technical Specifications

UC3825AN +BOM

Power management integrated circuit for switch mode power supplies with pulse width modulation control

Manufacturer:

Texas Instruments
Mfr.Part #:

UC3825AN
Datasheet:

UC3825AN Datasheet (PDF)
Topology:

Boost, Buck, Flyback, Forward, Full bridge, Half bridge, Push pull
Control mode:

Current, Voltage
Duty cycle (max) (%):

50
Switching frequency (max) (kHz):

1000
EDA/CAD Models:

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UC3825AN General Description

The UC3825AN is a high-speed PWM controller IC manufactured by Texas Instruments. It is commonly used in switch-mode power supply applications to control the power delivery to various electrical loads. The IC operates at a high frequency of up to 1 MHz, allowing for efficient power conversion while minimizing the size of external components.The UC3825AN features a voltage mode control architecture, which adjusts the duty cycle of the PWM signal based on the input voltage and feedback from the output load. This enables precise regulation of the output voltage and current, making it ideal for applications requiring stable and reliable power delivery.The device also includes a range of protection features such as overcurrent protection, overvoltage protection, and thermal shutdown, ensuring the safety and longevity of the power supply system. Additionally, the UC3825AN has a wide supply voltage range of 8V to 35V, making it suitable for a variety of power supply designs.

Key Features

UC3825AN is a high-performance current mode PWM controller.
It features low start-up current (500μA), adjustable operating frequency (to 1MHz), and on-chip error amplifier.
Other features include programmable soft-start, pulse-by-pulse current limiting, and adjustable dead-time control.
It is available in 16-pin PDIP package.

Application

Switching power supplies
DC-DC converters
Battery charging systems
Motor control systems
Industrial inverters and converters
Telecommunication power supplies
Uninterruptible power supplies (UPS)

Specifications

Topology	Boost, Buck, Flyback, Forward, Full bridge, Half bridge, Push pull	Control mode	Current, Voltage
Duty cycle (max) (%)	50	Switching frequency (max) (kHz)	1000
Features	Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Leading edge blanking, Multi-topology, Programmable max duty cycle, Soft start, Synchronization pin	UVLO thresholds on/off (V)	9.2/8.4
Operating temperature range (°C)	0 to 70	Rating	Catalog
Gate drive (typ) (A)	2	Vin (max) (V)	22