Overview
The UCC28C43DGK is a high-performance current-mode PWM controller produced by Texas Instruments. This component is part of the UCCx8C4x series, which is an enhanced BiCMOS version offering pin-to-pin compatibility with the industry-standard UCx84xA and UCx84x series PWM controllers. Designed for fixed-frequency, peak current-mode power supplies, the UCC28C43DGK is optimized for efficiency and high-speed applications, supporting operation frequencies up to 1MHz. Its low power consumption, fast current sensing, and precise duty cycle control make it a competitive choice for modern power management solutions. The device is available in an 8-VSSOP package and targets applications in industrial, automotive, and consumer electronics.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Manufacturer | Texas Instruments | - | - |
| Model | UCC28C43DGK | - | - |
| Category | DC-DC Control IC | - | - |
| Package | 8-VSSOP | - | - |
| Operating Frequency | Up to 1 | MHz | - |
| Startup Current | 50 | μA | Max |
| Operating Current | 2.3 | mA | At 52kHz |
| Current Sense to Output Delay | 35 | ns | - |
| Peak Output Current | ±1 | A | - |
| Input Voltage Range | 7.6 to 18 | V | - |
| Output Voltage | Up to 18 | V | - |
| Operating Temperature | 0 to 85 | °C | - |
Key Features
- Pin-to-pin compatibility with UCx84xA and UCx84x series.
- High-frequency operation up to 1MHz for high-speed applications.
- Low startup and operating current for improved efficiency.
- Fast current sense to output delay (35ns) for superior overload protection.
- ±1A peak output current for driving large external MOSFETs.
- Precise duty cycle and dead-time control.
Applications
The UCC28C43DGK is widely used in various power management applications, including industrial automation, automotive electronics, and consumer electronics. Its high efficiency and fast response make it suitable for flyback, boost, buck, and forward converter topologies. In industrial settings, it is ideal for motor control and power supply units. In automotive systems, it supports battery management and LED drivers. For consumer electronics, it is used in adapters, chargers, and portable devices.
Q & A
1. What is the maximum operating frequency of the UCC28C43DGK?
The UCC28C43DGK supports a maximum operating frequency of 1MHz.
2. What is the startup current of this device?
The startup current is 50μA (maximum).
3. Can the UCC28C43DGK drive large external MOSFETs?
Yes, it has a peak output current of ±1A, making it suitable for driving large MOSFETs.
4. What is the input voltage range for this controller?
The input voltage range is 7.6V to 18V.
5. What is the operating temperature range?
The operating temperature range is 0°C to 85°C.
6. Is the UCC28C43DGK compatible with other PWM controllers?
Yes, it is pin-to-pin compatible with the UCx84xA and UCx84x series.
7. What are the key advantages of using this controller?
Key advantages include low power consumption, high efficiency, fast response, and precise control.
8. What package does the UCC28C43DGK come in?
It is available in an 8-VSSOP package.
9. What are typical applications for this device?
Typical applications include flyback, boost, buck, and forward converters in industrial, automotive, and consumer electronics.
10. How does the UCC28C43DGK improve efficiency?
It reduces startup and operating current, minimizes losses, and provides precise control, enhancing overall efficiency.
