Overview
The UCC2800DTRG4, part of the UCC2800 family, is a high-speed, low-power integrated circuit designed by Texas Instruments. This device is tailored for use in off-line and dc-to-dc fixed frequency current-mode switching power supplies, requiring minimal external components. The UCC2800 family offers various models with different maximum duty cycles and reference voltages, making them versatile for various applications, including battery-operated systems and off-line power supplies.
Key Specifications
| Parameter | UCC2800 | Unit |
|---|---|---|
| Maximum Duty Cycle | 100% | % |
| Reference Voltage | 5 V | V |
| Turn-On Threshold | 7.2 V | V |
| Turn-Off Threshold | 6.9 V | V |
| VCC Voltage | 12 V | V |
| VCC Current | 30 mA | mA |
| Output Current (IO) | ±1 A | A |
| Output Energy (Capacitive Load) | 20 μJ | μJ |
| Analog Inputs (FB, CS, RC, COMP) | −0.3 V to the lesser of 6.3 V or VCC + 0.3 V | V |
| Power Dissipation at TA < +25°C (D package) | 0.65 W | W |
| Oscillator Frequency | Up to 1 MHz | Hz |
| Response Time from Current-Sense to Gate Drive Output | 70 ns | ns |
| Soft Start Time | 4-10 ms | ms |
Key Features
- Internal Soft Start and Fault Soft Start
- Internal Leading-Edge Blanking of the Current Sense Signal
- 1 Amp Totem-Pole Output
- 70 ns Typical Response from Current-Sense to Gate Drive Output
- 1.5% Tolerance Voltage Reference
- Same Pinout as UC3842 and UC3842A
- Low Power BICMOS Technology
- Full-Cycle Soft Start and Overcurrent Protection
- Digital Current Sense Filtering
- High Accuracy Error Amplifier with 2 MHz Gain Bandwidth Product
Applications
- Off-line and dc-to-dc fixed frequency current-mode switching power supplies
- Battery-operated systems (e.g., UCC2803 and UCC2805)
- Off-line power supplies (e.g., UCC2802 and UCC2804)
- High-efficiency power conversion systems
- Telecommunication and networking equipment
- Industrial power supplies and control systems
Q & A
- What is the maximum duty cycle of the UCC2800?
The maximum duty cycle of the UCC2800 is 100%.
- What is the reference voltage of the UCC2800?
The reference voltage of the UCC2800 is 5 V.
- What is the turn-on threshold voltage of the UCC2800?
The turn-on threshold voltage of the UCC2800 is 7.2 V.
- What is the typical response time from current-sense to gate drive output?
The typical response time from current-sense to gate drive output is 70 ns.
- Does the UCC2800 have internal soft start and fault soft start features?
- What is the power dissipation at TA < +25°C for the D package?
The power dissipation at TA < +25°C for the D package is 0.65 W.
- What is the oscillator frequency range of the UCC2800?
The oscillator frequency range of the UCC2800 can be up to 1 MHz.
- Does the UCC2800 have the same pinout as the UC3842 and UC3842A?
- What is the typical soft start time of the UCC2800?
The typical soft start time of the UCC2800 is between 4-10 ms.
- What are some common applications of the UCC2800?
The UCC2800 is commonly used in off-line and dc-to-dc fixed frequency current-mode switching power supplies, battery-operated systems, and off-line power supplies.
