Overview
The UC3843AN is an enhanced version of the UCx84x family of control devices, designed and manufactured by Texas Instruments. This component is pin-for-pin compatible with the UCx84x family and is optimized for use in DC-DC and off-line converters. It provides the necessary features to regulate switched-mode or current-mode power supplies, making it a versatile choice for various power supply applications.
The UC3843AN is characterized by its low start-up current, trimmed oscillator discharge current, and high-current totem-pole output, which are essential for efficient and stable power supply operation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package / Case | 8-DIP (0.300, 7.62mm) | |
| Mounting Type | Through Hole | |
| Input Voltage Range | 7.6V ~ 30V | V |
| Output Type | Transistor Driver | |
| Max Output Current | 4 A | A |
| Frequency Range | Up to 500kHz | Hz |
| Operating Temperature Range | 0°C to 70°C | °C |
| Lifecycle Status | Active |
Key Features
- Optimized for Off-Line and DC-DC Converters
- Low Start-Up Current (< 0.5 mA)
- Trimmed Oscillator Discharge Current (8.3 mA)
- 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 500kHz Operation
Applications
- Switch Mode Power Supplies (SMPS)
- DC-DC Converters
- Power Modules
- Industrial Power Supplies
- Battery-Powered Power Supplies
Q & A
- What is the UC3843AN used for?
The UC3843AN is used as the primary controller in various types of power supply circuits, such as flyback, forward, and boost converters, to regulate the output voltage and maintain stable operation.
- What is the maximum output current capability of the UC3843AN?
The maximum output current capability of the UC3843AN depends on the specific design and external components used in the power supply circuit, but it can generally handle currents up to a few amperes.
- What is the input voltage range of the UC3843AN?
The input voltage range of the UC3843AN is from 7.6V to 30V.
- What is the operating frequency range of the UC3843AN?
The UC3843AN can operate up to a frequency of 500kHz.
- What type of output does the UC3843AN provide?
The UC3843AN provides a transistor driver output.
- What are the key features of the UC3843AN?
The key features include low start-up current, trimmed oscillator discharge current, automatic feedforward compensation, pulse-by-pulse current limiting, and undervoltage lockout with hysteresis, among others.
- What is the lifecycle status of the UC3843AN?
The UC3843AN is currently in an active lifecycle status, meaning it is in production and available for purchase.
- What is the mounting type of the UC3843AN?
The UC3843AN uses a through-hole mounting type.
- What are the typical applications of the UC3843AN?
The UC3843AN is typically used in switch mode power supplies, DC-DC converters, power modules, industrial power supplies, and battery-powered power supplies.
- What is the operating temperature range of the UC3843AN?
The operating temperature range of the UC3843AN is from 0°C to 70°C.
