Current Mode PWM UC2844

The UC2844 integrated circuit is a versatile solution tailored for various power management applications. Packed with features, it offers precise frequency control with a trimmed oscillator, ensuring a guaranteed oscillator frequency of 250 kHz. This device supports current mode operation, enabling an output switching frequency of up to 500 kHz.

One of its remarkable features is the adjustable output dead time, ranging from 50% to 70%, providing flexibility in your designs. The UC2844 also incorporates automatic feedforward compensation and latching PWM for current limiting on a cycle-by-cycle basis, ensuring stable and efficient operation.

For added convenience, this IC includes an internally trimmed reference with Undervoltage lockout, enhancing both precision and safety in your power supply systems. Its high-current totem pole output allows it to handle demanding applications with ease.

The UC2844 has flexible functionality, including step-up, step-down, and isolation capabilities. It runs across a wide voltage range of 10V to 36V and has a duty cycle of up to 48%. Although it does not provide synchronous rectification or clock synchronization, it is notable for its simplicity and efficiency.

This circuit is available in multiple package options, including an 8-pin dual-in-line package and a surface-mount (SOIC-8) plastic container. Additionally, it comes in a 14-pin plastic surface mount (SOIC-14) package with separate power and ground pins for the totem pole output stage.

If you're working on applications in the automotive industry or other fields with specific site and control change requirements, look for the NCV prefix versions of UC2844. These are AEC-Q100 qualified and PPAP capable, meeting stringent automotive industry standards.

In summary, the UC2844 IC offers precision, versatility, and safety features, making it an excellent choice for your power management needs. Whether you're designing power supplies, converters, or other related systems, this IC is ready to provide the performance and reliability you require.

Voltage - Supply (Vcc/Vdd): 10V ~ 36V

Frequency - Switching: Up to 500kHz

Duty Cycle (Max): 48%

Output Type: Transistor Driver

Function: Step-Up, Step-Up/Step-Down

Output Configuration: Positive, Isolation Capable

Topology: Boost, Flyback

Number of Outputs: 1

Output Phases: 1

Synchronous Rectifier: No

Clock Sync: No

Control Features: Frequency Control

Operating Temperature: -25°C ~ 85°C (TA)

Mounting Type: Surface Mount

Category: Integrated Circuits (ICs), Power Management (PMIC), DC DC Switching Controllers

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