Overview
The UCC2813PWTR-0 is a high-speed, low-power integrated circuit from Texas Instruments, part of the UCCx813-x family of BiCMOS current-mode PWM controllers. This device is designed for use in off-line and DC-to-DC fixed-frequency switching power supplies, requiring a minimal number of external components. It offers advanced features such as internal full-cycle soft start, internal leading-edge blanking of the current-sense input, and a 1.5% tolerance voltage reference. The UCC2813PWTR-0 is available in a TSSOP package and is specified for operation from –40°C to 85°C, making it suitable for a wide range of applications including switch-mode power supplies, DC-DC converters, and industrial power supplies.
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% | 99% | 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 |
| Output Current | - | - | ±1 A | A |
| Operating Temperature Range | –40°C | - | 85°C | °C |
Key Features
- Low starting and operating supply currents (100 µA and 500 µA respectively)
- High-speed operation up to 1 MHz oscillator frequency
- Internal full-cycle soft start and internal leading-edge blanking of the current-sense input
- 1.5% tolerance voltage reference
- 70-ns typical response from current-sense to gate-drive output
- 1-A totem-pole output capable of driving the gate of a power MOSFET with peak currents exceeding ±750 mA
- Low self-biasing output during UVLO (Under-Voltage Lock-Out)
- Same pinout as UCC3802, UC3842, and UC3842A device families
- Available in surface-mount (TSSOP) 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-0?
The typical starting supply current is 100 µA.
- What is the maximum oscillator frequency of the UCC2813PWTR-0?
The maximum oscillator frequency is up to 1 MHz.
- What is the maximum duty cycle for the UCC2813PWTR-0?
The maximum duty cycle is approximately 100% for certain models.
- What is the reference voltage tolerance of the UCC2813PWTR-0?
The reference voltage tolerance is 1.5%.
- What is the response time from current-sense to gate-drive output?
The typical response time is 70 ns.
- What types of packages are available for the UCC2813PWTR-0?
The device is available in TSSOP and PDIP packages.
- What is the operating temperature range for the UCC2813PWTR-0?
The operating temperature range is from –40°C to 85°C.
- What are some common applications for the UCC2813PWTR-0?
Common applications include switch-mode power supplies, DC-DC converters, power modules, industrial power supplies, and battery-operated power supplies.
- Does the UCC2813PWTR-0 have internal soft start and leading-edge blanking features?
Yes, it has internal full-cycle soft start and internal leading-edge blanking of the current-sense input.
- What is the maximum output current of the UCC2813PWTR-0?
The maximum output current is ±1 A.
