The THX201 is a power management integrated circuit (PMIC) designed for offline power supplies. It is a highly integrated and cost-effective solution for applications requiring efficient and reliable power conversion. This IC incorporates several features to simplify the design and reduce the component count of power supplies, making it suitable for a wide range of consumer and industrial applications.

Applications

• Battery chargers
• Adapters for mobile devices
• Standby power supplies
• LED lighting drivers
• Small appliances power supplies

Features

• Built-in high voltage power MOSFET
• Current-mode PWM control
• Frequency jittering for improved EMI performance
• Over-temperature protection (OTP)
• Over-current protection (OCP)
• Over-voltage protection (OVP)
• Under-voltage lockout (UVLO)
• Short-circuit protection (SCP)
• Soft start to reduce stress on components

Benefits

• Simplified Design: The integrated MOSFET and control circuitry reduce the number of external components required, simplifying the power supply design and lowering the bill of materials (BOM) cost.
• High Efficiency: Current-mode PWM control optimizes the efficiency of the power conversion process, minimizing power losses and reducing heat generation.
• Enhanced Reliability: Comprehensive protection features such as OTP, OCP, OVP, UVLO, and SCP ensure the robust and reliable operation of the power supply under various fault conditions.
• Improved EMI Performance: Frequency jittering technique reduces electromagnetic interference (EMI), making it easier to meet regulatory requirements.
• Cost-Effective Solution: The high level of integration and reduced component count result in a cost-effective power supply solution.

Additional Details

The THX201 typically operates with an input voltage range of 85VAC to 265VAC. The switching frequency is internally set to around 65kHz. It is available in a DIP-8 package. The device's comprehensive protection features safeguard against potential failures, enhancing the lifespan and dependability of the end product. It's often used in low-power applications where efficiency, size, and cost are critical factors. The internal soft-start function minimizes stress on the MOSFET and other components during startup, contributing to increased reliability.