Overview
The UCC2813PWTR-1 is a high-speed, low-power integrated circuit from Texas Instruments, part of the UCC2813-x device family. This BiCMOS current-mode PWM controller is designed for use in off-line and DC-to-DC fixed-frequency switching power supplies. It offers a minimal parts count and is compatible with the pin configuration of the UC384x device family. The UCC2813PWTR-1 is particularly suited for applications requiring high efficiency and reliability, with features such as internal soft start, leading-edge blanking of the current-sense signal, and a 1.5% tolerance voltage reference.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Starting Supply Current | - | 100 µA | - | µA |
| Operating Supply Current | - | 500 µA | - | µA |
| Oscillator Frequency | - | Up to 1 MHz | - | Hz |
| Maximum Duty Cycle | 97% | - | 100% | % |
| Reference Voltage | 4.925 | 5 | 5.075 | V |
| Turn-On Threshold | 7.2 | - | 12.5 | V |
| Turn-Off Threshold | 6.9 | - | 8.3 | V |
| Operating Temperature Range | -40°C | - | 85°C | °C |
| Package Type | - | TSSOP (8-pin) | - | - |
Key Features
- Low starting and operating supply current (100 µA and 500 µA respectively)
- Internal soft start and fault soft start
- Internal leading-edge blanking of the current-sense signal
- 1-A totem-pole output
- 70-ns typical response from current-sense to gate-drive output
- 1.5% tolerance voltage reference
- Same pinout as UC384x device family
- Up to 1-MHz oscillator frequency
- Minimal external components required
- Available in surface-mount and PDIP packages
Applications
- Switch mode power supplies (SMPS)
- DC-DC converters
- Power modules
- Industrial power supplies
- Battery-operated power supplies
Q & A
- What is the typical starting supply current of the UCC2813PWTR-1?
The typical starting supply current is 100 µA. - What is the maximum oscillator frequency of the UCC2813PWTR-1?
The maximum oscillator frequency is up to 1 MHz. - What is the operating temperature range for the UCC2813PWTR-1?
The operating temperature range is from -40°C to 85°C. - What type of package is the UCC2813PWTR-1 available in?
The UCC2813PWTR-1 is available in an 8-pin TSSOP package. - Does the UCC2813PWTR-1 have internal soft start and fault soft start features?
Yes, it does. - What is the typical response time from current-sense to gate-drive output?
The typical response time is 70 ns. - What is the tolerance of the voltage reference in the UCC2813PWTR-1?
The voltage reference has a 1.5% tolerance. - Is the UCC2813PWTR-1 compatible with the UC384x device family pinout?
Yes, it is. - What are some common applications of the UCC2813PWTR-1?
Common applications include switch mode power supplies, DC-DC converters, power modules, industrial power supplies, and battery-operated power supplies. - Does the UCC2813PWTR-1 require many external components?
No, it requires very few external components.
