Overview
The UCC28C40DGKR is a high-performance, low-power current-mode PWM (Pulse Width Modulation) controller produced by Texas Instruments. This component is part of the UCCx8C4x family, which offers enhanced replacements for the industry-standard UCx84x and UCx84xA families with pin-to-pin compatibility. The UCC28C40DGKR is designed using BiCMOS technology, providing lower power consumption, faster current sense, and oscillator frequency. It is particularly suited for applications requiring high-frequency operation, precise control, and low power consumption.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | UCC28C40DGKR |
| Package | 8-VSSOP (DGK) |
| Pins | 8 |
| Control Method | Peak Current Mode |
| Duty Cycle (Max) | 100% |
| Frequency (Max) | 1 MHz |
| Frequency (Min) | 26 kHz |
| Gate Drive (Typ) | ±1 A |
| Operating Temperature Range | -40°C to 125°C |
| UVLO Thresholds On/Off | 7 V / 6.6 V |
| Vin (Max) | 20 V |
| Vin (Min) | 7 V |
| Topology | Boost, Buck, Buck-Boost, Flyback, Forward |
| RoHS Status | Compliant |
Key Features
- Enhanced replacement for UCx84x and UCx84xA family with pin-to-pin compatibility
- Operating frequency up to 1 MHz
- Low startup current: 50 µA, maximum 100 µA
- Low operating current: 2.3 mA at fOSC = 52 kHz
- Fast cycle-by-cycle overcurrent limiting: 35 ns
- Peak driving current: ±1 A with rail-to-rail output
- 25 ns rise time and 20 ns fall time
- ±1% accurate 2.5 V error amplifier reference
- Trimmed oscillator discharge current
- Undervoltage lockout protections
- VSSOP-8 package to minimize board space
Applications
- Switch-mode power supplies
- General purpose single-ended DC-DC or off-line isolated power converters
- Board mount power modules
- Battery systems requiring lower startup voltages
Q & A
- What is the UCC28C40DGKR used for? The UCC28C40DGKR is used as a high-performance, low-power current-mode PWM controller in various power supply applications.
- What is the maximum operating frequency of the UCC28C40DGKR? The maximum operating frequency is up to 1 MHz.
- What is the typical startup current of the UCC28C40DGKR? The typical startup current is 50 µA, with a maximum of 100 µA.
- What are the operating temperature ranges for the UCC28C40DGKR? The operating temperature range is from -40°C to 125°C.
- What topologies does the UCC28C40DGKR support? It supports Boost, Buck, Buck-Boost, Flyback, and Forward topologies.
- Is the UCC28C40DGKR RoHS compliant? Yes, the UCC28C40DGKR is RoHS compliant.
- What is the package type of the UCC28C40DGKR? The package type is 8-VSSOP (DGK).
- What is the peak driving current capability of the UCC28C40DGKR? The peak driving current capability is ±1 A.
- Does the UCC28C40DGKR have undervoltage lockout protections? Yes, it has undervoltage lockout protections.
- What is the accuracy of the error amplifier reference voltage? The error amplifier reference voltage is accurate to ±1% at 2.5 V.
