Overview
The UCC2813D-5G4 is a member of the UCC2813-x family of high-speed, low-power integrated circuits from Texas Instruments. These devices are designed for use in off-line and DC-to-DC fixed-frequency current-mode switching power supplies. They offer a range of features that make them suitable for various power supply applications, including battery-operated systems and industrial power supplies. The UCC2813D-5G4 is characterized by its low starting and operating supply currents, internal soft start, and leading-edge blanking of the current-sense signal, among other features.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Starting Supply Current | 100 µA | - | - | µA |
| Operating Supply Current | 500 µA | - | - | µA |
| Oscillator Frequency | Up to 1 MHz | - | - | Hz |
| Reference Voltage | 4 V | 3.94 V | 4.06 V | V |
| Turn-On Threshold | 4.1 V | - | - | V |
| Turn-Off Threshold | 3.6 V | - | - | V |
| Maximum Duty Cycle | 50% | 48% | 50% | % |
| Current Sense Gain | 1.65 V/V | 1.1 V/V | 1.8 V/V | V/V |
| Output Current | ±1 A | - | - | A |
| Operating Temperature Range | -40°C to 85°C | -40°C | 85°C | °C |
Key Features
- Low starting supply current: typically 100 µA
- Low operating supply current: typically 500 µA
- Internal soft start and fault soft start
- 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
- Pinout compatible with UC3842 and UC3842A families
- Up to 1-MHz oscillator frequency
- Internal full-cycle restart delay
- Low self-biasing output during UVLO
- 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 UCC2813D-5G4? The typical starting supply current is 100 µA.
- What is the operating supply current of the UCC2813D-5G4? The typical operating supply current is 500 µA.
- What is the reference voltage for the UCC2813D-5G4? The reference voltage is 4 V with a tolerance of 1.5%.
- What is the maximum duty cycle for the UCC2813D-5G4? The maximum duty cycle is 50%.
- What is the gain of the current sense amplifier in the UCC2813D-5G4? The gain of the current sense amplifier is typically 1.65 V/V.
- What is the operating temperature range for the UCC2813D-5G4? The operating temperature range is from -40°C to 85°C.
- What types of packages are available for the UCC2813D-5G4? The device is available in surface-mount and PDIP packages.
- Does the UCC2813D-5G4 have internal soft start and fault recovery features? Yes, it has internal soft start and fault soft start features.
- What is the response time from current-sense to gate-drive output in the UCC2813D-5G4? The typical response time is 70 ns.
- Is the UCC2813D-5G4 pinout compatible with other families of PWM controllers? Yes, it is pinout compatible with the UC3842 and UC3842A families.
