UCC2804DTR Integrated Circuits (ICs)

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The Texas Instruments UCC2804DTR is an integrated switch-mode power supply (SMPS) controller used with power factor correction (PFC) and other applications. It controls the on/off time of the switching power supply, adjusts the current limit and voltage level, and also handles short-circuit protection and other related functions. The UCC2804DTR supports a wide input voltage range and is perfect for low-power offline power supply designs. It has an impressive power efficiency of up to 96%, low EMI, and low standby power consumption.

The UCC2804DTR is part of the Texas Instruments family of switch-mode power supply (SMPS) controllers, which provide a wide range of integration and operation features, including sensing components and protection circuits. The primary application field for UCC2804DTR is off-line SMPS, typically for AC/DC converters and other applications characterized as "non-isolated converters", industry field such as telecom power supply and adapter, domestic products like climate control, home appliances and entertainment, increasingly applied in mid- to high-end products.

The UCC2804DTR integrates a number of features including standby supply voltage regulation, under-voltage lockout, soft start, over-current protection, fixed on-time, adaptive frequency control, fixed frequency operation and brown-out protection. The device is available in a small 8-pin SOIC package, perfect for space constraints applications. It is also AEC-Q100 qualified and RoHS-compliant.

The UCC2804DTR is a current-mode, pulse-width modulated (PWM) offline SMPS controller with low standby power consumption and IEC60950-1 primary-side-protection. It designed to meet two main objectives - reduce the external components count and simplify the design. The UCC2804DTR supports fixed on-time, pulse skip mode and frequency fold-back operation. It operates over a wide frequency range up to 500 kHz and generates gate drivers of up to 2.5 A(5.5 A peak). Voltage mode control compensates for variations in load, line, temperature and component tolerances, while the hysteretic current limit circuit ensures fast loop response.

The UCC2804DTR controller provides many options for external components such as current sensing, voltage regulation and loop compensation. The current sensing can be done externally, using resistors for current sensing, or with external isolation MOSFETs. The output voltage can be regulated with an RC network, and the loop compensation can be implemented with capacitor-resistor elements.

The UCC2804DTR is a cost-effective solution for universal input AC/DC power supplies, and it is suitable for a wide range of applications. Its integrated features make it easy to design, and its fast response time and wide operating frequency range make it suitable for a variety of applications such as one time programming, lighting, medical, industrial and home appliance applications.

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