Accumulation Technology has introduced a high efficiency 60V, 1A step-down DC/DC converter-MBI6661 for LED street lights, wall washers, tunnel lights and other lighting applications. The MBI6661 accepts a wide input voltage range of 9 to 60V with an efficiency of up to 97%. The MBI6661 can be externally adjusted for a constant output current of up to 1A with current accuracy within ±5%. The MBI6661 has a built-in power switch and can drive 10 to 14 LEDs connected in series with a 52V DC power supply. The MBI6661 also features Hysteretic PFM technology, which eliminates the need for additional compensation and optimizes efficiency under light and heavy loads. The MBI6661 only needs to be equipped with 4 external components, which makes the overall design of LED lighting more streamlined and cost-effective. The MBI6661 can also be used for LED dimming via PWM. For system robustness and stability, the MBI6661 also features a full range of protection features including Start-Up, Undervoltage Lockout Protection (UVLO), Over Temperature Protection (OTP), Over Current Protection (OCP), and LED Open Circuit. With short circuit protection. In addition, built-in thermal protection mechanisms and package options with good heat dissipation provide better system reliability. The MBI6661 is currently available in TO-252 and SOP-8 packages with excellent heat dissipation. In addition to the MBI6661, Accumulation Technology also introduced the 60V, 500mA step-down DC/DC converter, the MBI6660, for different LED lighting applications. For LED outdoor lighting applications, the high efficiency of the MBI6661 and MBI6660 reduces power consumption, while its high current accuracy provides uniform brightness of the LED. Therefore, MBI6661 and MBI6660 are especially suitable for lighting applications such as LED street lights, wall washers, and tunnel lights.
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