STR-A6061HD

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STR-A6061HD is a high performance offline switcher IC designed for use in AC-DC and DC-DC converters. It has built-in protections against over-voltage, over-load, and short-circuit. It also features several control and protection features for reliable operation and minimal output ripple.

The STR-A6061HD is a current-mode switching controller incorporating a wide range of features for regulation and fault protection in AC/DC and DC/DC applications. These features include cycle by cycle current limiting, over voltage protection, under voltage lockout, soft-start and under voltage shutdown. It also has a built in MOSFET gate driver with an adjustable slew rate.

The STR-A6061HD includes a secondary control loop that operates independently of the primary control loop. It can be used to achieve higher line regulation or tighter load regulation, depending on the application requirements. The secondary loop is also useful for implementing active power limit or current limit schemes.

The main feature of this controller is that it offers superior line and load regulation. Over-voltage and over-load protection are achieved by means of pulse-by-pulse current limiting, which will cause the controller to shut down if an overload condition is detected. Short-circuit protection is accomplished by limiting the gate drive voltage. This prevents the power MOSFET from being over-driven and causing excessive power dissipation.

The STR-A6061HD works by switching an inverted sinusoidal current waveform through the load, converted from a voltage by a transformer. A feedback signal from the secondary side of the transformer is detected and compared to an internal reference voltage applied at the feedback input. The resulting error signal drives a closed-loop PWM controller, which adjusts the duty cycle of the inverted waveform. This ensures that the output voltage is precisely regulated and within the required range.

The STR-A6061HD is well-suited for a variety of applications, including AC/DC and DC/DC converters, LED lighting, security and safety systems, industrial process controls and motor control systems. Its use also extends beyond power supply and motor control, including use in portable applications where space is at a premium. The device provides superior regulation and protection, combined with extensive fault protection, making it an ideal choice for a wide range of applications.

Thanks to its built-in features and fault protection, the STR-A6061HD is a reliable choice for applications that require high levels of power efficiency and reliability with limited input voltage and loadcurrent capability. The device is easy to integrate with minimal external components and offers a cost-effective solution for power management.

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