The UCC3808APWTR-2G4 is a low-power, BiCMOS current-mode pulse-width modulation (PWM) controller from Texas Instruments, designed for a wide range of power supply applications. This integrated circuit is engineered to provide reliable and efficient control for switch-mode power supplies while maintaining a low power operation, making it an ideal choice for portable and energy-sensitive applications.

Key Features

• Low Startup and Operating Current: The device boasts a startup current of typically 0.15 mA and an operating current of typically 0.7 mA, which helps in minimizing power consumption during both startup and normal operation.
• Wide Supply Voltage Range: It operates over a wide supply voltage range from 4.5V to 21V, accommodating various application requirements and ensuring flexibility in design.
• Programmable Switching Frequency: The UCC3808APWTR-2G4 allows for a programmable switching frequency up to 1 MHz, enabling designers to optimize the performance of their power supply.
• Trimmed Oscillator Discharge Current: This feature helps in achieving a consistent and accurate frequency of operation over the entire temperature range.
• Current-Mode Control: The current-mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation.
• High Peak Current Drive: The output stage features a high peak current drive capability of ±1 A, suitable for driving a power MOSFET directly.
• Soft Start: The soft-start function limits the inrush current during startup, thus reducing stress on the power supply components.

Applications

The UCC3808APWTR-2G4 is versatile and can be used in a variety of applications, including:

• DC to DC converters
• Off-line power supplies
• Portable devices
• Communication power supplies
• Industrial and medical equipment

Package and Reliability

This device is available in a TSSOP-8 (Thin Shrink Small Outline Package) which is suitable for space-constrained applications. It also features an extended industrial temperature range, ensuring reliable operation under harsh conditions. The UCC3808APWTR-2G4 is a testament to Texas Instruments' commitment to high quality and reliability in power management solutions.