Overview
The UCC2808D-1G4, produced by Texas Instruments, is a high-performance, low-power current-mode push-pull PWM controller. This device is part of the UCCx808-x family and is designed for use in various switching power supply applications. It features an integrated error amplifier, oscillator, and high-current output stages, making it suitable for server and desktop power supplies, telecom power supplies, DC-DC converters, and other switched-mode power supplies.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VDD) | 5 | 14 | V | |
| Supply Current (IDD) | 1 mA | 20 mA | mA | |
| Output Stage Source Current (Peak) | 0.5 A | A | ||
| Output Stage Sink Current (Peak) | 1.0 A | A | ||
| Oscillator Frequency | 175 kHz | 194 kHz | 213 kHz | kHz |
| Open-Loop Voltage Gain | 60 dB | 80 dB | 100 dB | dB |
| Junction Temperature (TJ) | -40°C | 85°C | °C | |
| Power Dissipation at TA = 25°C (D Package) | 650 mW | mW |
Key Features
- High-speed, low-power current-mode PWM controller
- Internal soft-start and on-chip error amplifier with 2-MHz gain bandwidth product
- On-chip VDD clamping and undervoltage lockout (UVLO) with hysteresis options
- Output drive stages capable of 500-mA peak source current and 1-A peak sink current
- Push-pull configuration with dead time between outputs to prevent simultaneous switching
- Low quiescent VDD current and high efficiency
- Available in SOIC (8-pin) and PDIP (8-pin) packages
Applications
- Server and desktop power supplies
- Telecom power supplies
- DC-DC converters
- Switched-mode power supplies
Q & A
- What is the typical operating current of the UCC2808D-1G4?
The typical operating current is around 1 mA.
- What is the maximum output stage source current of the UCC2808D-1G4?
The maximum output stage source current is 0.5 A.
- What is the oscillator frequency range of the UCC2808D-1G4?
The oscillator frequency range is from 175 kHz to 213 kHz.
- What are the package options available for the UCC2808D-1G4?
The device is available in SOIC (8-pin) and PDIP (8-pin) packages.
- What is the junction temperature range for the UCC2808D-1G4?
The junction temperature range is from -40°C to 85°C.
- Does the UCC2808D-1G4 have internal soft-start and UVLO features?
Yes, it has internal soft-start and undervoltage lockout (UVLO) features with hysteresis options.
- What is the recommended decoupling capacitor for the VDD terminal?
A 0.1-µF 0603-sized 25-V X7R capacitor is recommended.
- What are the typical applications of the UCC2808D-1G4?
Typical applications include server and desktop power supplies, telecom power supplies, DC-DC converters, and switched-mode power supplies.
- How do the output stages of the UCC2808D-1G4 operate?
The output stages operate in a push-pull configuration, switching at half the oscillator frequency with a dead time between the outputs to prevent simultaneous switching.
- What is the power dissipation at TA = 25°C for the SOIC package?
The power dissipation at TA = 25°C for the SOIC package is 650 mW.
