Overview
The UC2843AD8, produced by Texas Instruments, is a current-mode PWM (Pulse Width Modulation) controller designed for use in off-line and DC-DC converters. This device is part of the UCx84xA family, which is a pin-for-pin compatible improved version of the UCx84x family. It offers several enhanced features such as low start-up current, trimmed oscillator discharge current, and automatic feedforward compensation, making it suitable for a wide range of power supply applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 40°C to 85°C | °C |
| Maximum Operating Voltage | 30 | V |
| Maximum Output Current | 1 | A |
| Switching Frequency | Up to 500 kHz | kHz |
| Undervoltage Lockout (UVLO) | 8.4 V (on), 7.6 V (off) | V |
| Package Type | SOIC (D) with 8 pins | - |
| Start-Up Current | < 0.5 mA | mA |
| Oscillator Discharge Current | 8.3 mA | mA |
| Maximum Duty Cycle | < 100% | % |
Key Features
- 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
- Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer
Applications
- Switch Mode Power Supplies (SMPS)
- DC-DC Converters
- Power Modules
- Industrial Power Supplies (PSU)
- Battery Operated Power Supplies (PSU)
Q & A
- What is the maximum operating temperature of the UC2843AD8?
The maximum operating temperature is 85°C.
- What is the maximum output current of the UC2843AD8?
The maximum output current is 1 A.
- What is the switching frequency range of the UC2843AD8?
The switching frequency can go up to 500 kHz.
- What are the undervoltage lockout (UVLO) thresholds for the UC2843AD8?
The UVLO thresholds are 8.4 V (on) and 7.6 V (off).
- What is the package type of the UC2843AD8?
The package type is SOIC (D) with 8 pins.
- What is the start-up current of the UC2843AD8?
The start-up current is less than 0.5 mA.
- What is the oscillator discharge current of the UC2843AD8?
The oscillator discharge current is trimmed to 8.3 mA.
- Does the UC2843AD8 support pulse-by-pulse current limiting?
Yes, it supports pulse-by-pulse current limiting.
- What are some typical applications of the UC2843AD8?
Typical applications include switch mode power supplies, DC-DC converters, power modules, industrial power supplies, and battery-operated power supplies.
- Can the UC2843AD8 be used with the WEBENCH Power Designer?
Yes, it can be used to create custom designs with the WEBENCH Power Designer.
