Description
Here's a concise introduction to the UC3845AD:
The UC3845AD is a robust AC-DC controller and regulator from Microsemi Corporation, designed for use in switch mode power supplies, voltage regulators, motor control circuits, and battery chargers. It excels at delivering high efficiency, fast transient response, and precise voltage regulation. This 14-pin SOIC device operates within the range of 7.6V to 30V and features a trimmed oscillator discharge current, automatic feedforward compensation, pulse-by-pulse current limiting, and other advanced capabilities. Its optimized design enables reliable performance in various applications where demanding power conversion requirements are necessary. With its impressive feature set and robust construction, the UC3845AD is an ideal choice for designers seeking to create high-performance power supplies, regulators, or motor control systems.
Features
The UC3845AD features include:
- Optimized for Off-Line and DC-DC Converters
- Low Start-Up Current (< 0.5 mA)
- Trimmed Oscillator Discharge Current
- Automatic Feedforward Compensation
- Pulse-by-Pulse Current Limiting
- Enhanced Load Response Characteristics
- Undervoltage Lockout With Hysteresis
- Double Pulse Suppression
- High-Current Totem Pole Output
- Internally-Trimmed Bandgap Reference
- Up to 500-kHz Operation
These features make it suitable for applications such as switch mode power supplies, voltage regulators, motor control circuits, and battery chargers.
Package
The package type of UC3845AD is SOIC-14 (Small Outline Integrated Circuit - 14 pins).
Pinout
The UC3845AD has a package type of SOIC-14, which means it has 14 pins.
Here's a concise breakdown of each pin's function:
1. VCC: Input voltage
2. COMP: Compensation input
3. FB: Feedback input
4. OUT: Output (totem pole)
5. DIS: Discharge output
6. CLR: Clear input
7. TRIM: Trim input
8. UVLO: Undervoltage lockout input
9. VREF: Reference voltage output
10. GND: Ground
11-14: Unused pins
Please note that the UC3845AD is an AC-DC controller and regulator, so it's designed to regulate the output voltage based on the feedback signal (FB) and control the switching of the power stage.
Manufacturer
The manufacturer of the UC3845AD is Microsemi Corporation, a leading provider of semiconductor solutions.
Applications
The UC3845AD is commonly used in switch mode power supplies, voltage regulators, motor control circuits, and battery chargers. It's also suitable for applications requiring high efficiency, fast transient response, and precise voltage regulation.
Equivalent
Based on the features and specifications of the UC3845AD, some equivalent products could be:
- STMicroelectronics' ST5400
- Texas Instruments' UCC28051
- ON Semiconductor's NCP1396
- Analog Devices' ADP8860
These devices share similar characteristics such as high-frequency operation, low start-up current, and pulse-by-pulse current limiting. However, please note that each product may have its unique features and specifications, making them suitable for specific applications.
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Warranty
Good Product. Matches description.