Overview
The UC2844ADM is a high-performance current mode controller integrated circuit (IC) produced by Microsemi Corporation. It is designed for off-line and DC-to-DC converter applications, offering a cost-effective solution with minimal external components. This IC is particularly suited for boost, buck, flyback, and forward converter topologies, making it versatile for various power supply designs.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer Part Number | UC2844ADM |
| Manufacturer | Microsemi Corporation |
| Description | IC REG CTRLR PWM CM 8SOIC |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Voltage - Supply (Vcc/Vdd) | 10 V ~ 30 V |
| Voltage - Start Up | 16 V |
| Topology | Boost, Buck, Flyback, Forward |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Internal Switch(s) | No |
| Frequency - Switching | 500 kHz |
| Fault Protection | Current Limiting |
| Duty Cycle | 48% |
| Control Features | Frequency Control |
Key Features
- Current Mode Operation up to 500 kHz Output Switching Frequency
- Output Deadtime Adjustable from 50% to 70%
- Automatic Feed Forward Compensation
- Latching PWM for Cycle-by-Cycle Current Limiting
- Internally Trimmed Reference with Undervoltage Lockout
- High Current Totem Pole Output
- Input Undervoltage Lockout with Hysteresis
- Low Startup and Operating Current
- Direct Interface with ON Semiconductor SENSEFET Products
- Pb-Free Packages Available
Applications
The UC2844ADM is widely used in various power supply applications, including off-line and DC-to-DC converters. It is suitable for boost, buck, flyback, and forward converter topologies, making it a versatile component for power management in electronic devices such as:
- Switch-mode power supplies
- DC-DC converters
- Power adapters
- Industrial power systems
Q & A
- What is the UC2844ADM used for? The UC2844ADM is used in off-line and DC-to-DC converter applications, providing a high-performance current mode control solution.
- What are the key features of the UC2844ADM? Key features include current mode operation up to 500 kHz, adjustable output deadtime, automatic feed forward compensation, and high current totem pole output.
- What is the operating temperature range of the UC2844ADM? The operating temperature range is -40°C to 85°C.
- What are the typical applications of the UC2844ADM? Typical applications include switch-mode power supplies, DC-DC converters, power adapters, and industrial power systems.
- Does the UC2844ADM have built-in protection features? Yes, it includes features such as input and reference undervoltage lockouts, cycle-by-cycle current limiting, and a latch for single pulse metering.
- What is the package type of the UC2844ADM? The UC2844ADM is available in an 8-SOIC package.
- What is the maximum switching frequency of the UC2844ADM? The maximum switching frequency is 500 kHz.
- Is the UC2844ADM Pb-free? Yes, Pb-free packages are available.
- How does the UC2844ADM handle output deadtime? The output deadtime is adjustable from 50% to 70% and can be programmed using the internal flip-flop and CT discharge period.
- What is the typical supply voltage range for the UC2844ADM? The typical supply voltage range is 10 V to 30 V.
