Overview
The UCC28083D is a BiCMOS pulse width modulation (PWM) controller designed by Texas Instruments for use in high-performance power management applications. This device is part of the UCC38083/4/5/6 family and is specifically tailored for dc-to-dc or off-line fixed-frequency current-mode switching power supplies. The UCC28083D features a push-pull topology with dual output stages, making it suitable for a variety of applications including telecommunications, industrial power systems, and consumer electronics.
Although the UCC28083D is currently obsolete and no longer in production, it remains a significant component in legacy systems and designs. New designs should consider alternative products, but existing systems can still benefit from understanding its capabilities and features.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | SOIC-8 | 8 pins |
| Operating Temperature Range | -40°C to 85°C | |
| Supply Voltage Range | 8.3 V to 15 V | |
| Switching Frequency Range | 50 kHz to 1 MHz | |
| Output Stage Capability | 1-A sink, 0.5-A source | |
| Start-Up Threshold Voltage | 12.5 V (UCC38083/5), 4.3 V (UCC38084/6) | |
| Dead Time Between Outputs | Typically 110 ns | |
| Soft-Start Interval Time | 3.5 ms (UCC38083/4), less than 100 µs (UCC38085/6) | |
| Current Limiting | Cycle-by-cycle current limiting | |
| RoHS Status | Lead free / RoHS Compliant |
Key Features
- Programmable slope compensation to improve stability and reduce subharmonic oscillations.
- Internal soft-start function to minimize inrush current, with different soft-start intervals depending on the device variant.
- Cycle-by-cycle current limiting for enhanced protection.
- Low start-up current of 120 µA and typical run current of 1.5 mA.
- Single external component oscillator programmable from 50 kHz to 1 MHz.
- High-current totem-pole dual output stage with 1-A sink and 0.5-A source capability.
- Current sense discharge transistor to improve dynamic response.
- Internally trimmed bandgap reference for stable operation.
- Undervoltage lockout with hysteresis for robust start-up and shutdown.
- Thermal shutdown and overcurrent protection for enhanced safety.
Applications
- High-efficiency switch-mode power supplies.
- Telecom dc-to-dc converters.
- Point-of-load or point-of-use power modules.
- Low-cost push-pull and half-bridge applications.
- Industrial automation power converters.
- Consumer electronics adapters.
- LED lighting drivers.
- Solar power inverters.
- Electric vehicle chargers.
- Medical equipment power supplies).
Q & A
- What is the UCC28083D used for?
The UCC28083D is used in high-performance power management applications, including dc-to-dc converters, switch-mode power supplies, and various industrial and consumer electronics.
- What is the operating temperature range of the UCC28083D?
The operating temperature range of the UCC28083D is -40°C to 85°C.
- What is the switching frequency range of the UCC28083D?
The switching frequency range of the UCC28083D is 50 kHz to 1 MHz.
- Does the UCC28083D have built-in protection features?
- What is the start-up current of the UCC28083D?
The start-up current of the UCC28083D is 120 µA, with a typical run current of 1.5 mA.
- Is the UCC28083D RoHS compliant?
- What is the package type of the UCC28083D?
The UCC28083D is available in an 8-pin SOIC (D) package.
- What are the typical applications of the UCC28083D?
- Is the UCC28083D still in production?
- What is the purpose of the internal soft-start function in the UCC28083D?
