US letter introduces high-brightness LED drivers, power output exceeding 50W

Maxim (US letter) recently introduced a high brightness (HB) LED driver with wide input voltage range, MAX16801 / MAX16802. The MAX16801 is suitable for universal AC inputs (85V to 265V AC voltage rectification input) LED driver, the MAX16802 is suitable for DC input voltage LED drivers (10.8V to 24VDC, the input voltage can be higher when using external bias). Be Be Maxim said that the MAX16801 / MAX16802 has a 262 kHz fixed switching frequency and a current mode control scheme. With external MOSFETs, high-power output (more than 50W) can be provided and high efficiency (more than 85%). Small size components are allowed to reduce system costs. Be The drive IC can drive several HB LEDs in series, which can achieve a wide adjustment range (0 to 100%) by PWM or linear brightness adjustment. When the LED current is needed, the designer can use the board error amplifier and a reference to 1%. This device is suitable for Buck, Boost, Sepic, Isolated or Non-isolated flexion topics for universal lighting applications, decorative lights, and architectural lighting, display backlighting, and other constant current source LED applications. Be Both devices have 45μA boot current, allowing the use of large resistance to start resistance and small capacity starting capacitance. The LED driver is started quickly, and the power consumption is reduced. Allows the input start voltage through the external resistor divider, implement the input voltage undervoltage lock (UVLO) function; pull down the UVLO pin will turn off the device. The MAX16801 / MAX16802 has digital soft start, which can better control the rise in output current during startup. This fundamentally eliminates the output current overshoot. Both devices have thermal shutdown characteristics, and 50% or 75% maximum duty cycle. Be The MAX16801 / MAX16802 rated in the expanded stage temperature range (-40 ° C to + 85 ° C), with surface mount, lead-free, 8-pin μmax package. The price is 0.63 US dollars (1,000 pieces, the US offshore price). Technology area Texas Instrument Q2 net profit 1405 million US dollars, simulated products contribute 90% profit Empowering Electronics Industry Chain Specialized Service Huaqiang Jufeng won the B-round over 100 million financing Professor Wei Jun, Weihua University: From IA to Ai, we have to go far PCB layout restriction based on X2SON package Independent control, synergistic development, how to integrate military and civilians?

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