UCC2813PWTR-4G4

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The UCC2813PWTR-4G4 is part of Texas Instruments’ (TI) family of integrated alternating current (AC) and direct current (DC) converters, which are designed specifically to provide the highest power efficiency and precision voltage regulation in an offline switcher. This specific series is a current mode PWM controller with integrated brownout protection and internal digital diagnostics, making it suitable for many applications.

The UCC2813PWTR-4G4 is an addition to TI’s extensive portfolio of power management and power protection products. This IC can support up to 5 A peak current output with a wide input supply range of 8V to 40V. It is designed to work with a wide selection of integrated power switches and external components to offer a power solution from the smallest CMOS-based logic load to the largest transformer-based switch mode power supply (SMPS).

In terms of application fields, the UCC2813PWTR-4G4 is designed for single-ended, isolated, offline flyback applications such as desktop and small to medium-sized networking power supplies. These power supplies require small, low-profile packages and precise voltage regulation on a range of input voltages. Additionally, this IC is suitable for small-scale, low-power UPSs, battery chargers, home appliances, and electronic toys.

The UCC2813PWTR-4G4 has a built-in 650 V MOSFET; with this, the IC minimizes external component counts. The IC also features integrated brownout protection and offers fault-protection functions such as OC and OV, as well as adjustable protection levels. This makes it especially suitable for low-power applications where space and cost are both a consideration.

The operating principle of the UCC2813PWTR-4G4 is based on a current mode PWM scheme. The IC utilizes an internal oscillator, an error amplifier, a voltage reference, a current monitoring and control module, and a protection block to create a pulsed voltage regulation system. The current mode PWM scheme runs at a variable frequency, allowing for high-efficiency operation. The IC’s programmable parameters include switching frequency, peak current limit, forced on/off, and soft start.

The UCC2813PWTR-4G4 from TI is a compact yet powerful current mode PWM controller designed specifically for offline switch applications. It is an ideal choice for single-ended, isolated, offline flyback designs, offering peak current output of up to 5 A while minimizing the external component count and providing precise voltage regulation on a wide input voltage range. Its current mode PWM scheme allows for higher efficiency operation, while an integrated 650 V MOSFET helps to reduce cost and space further.

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