LTC7820IUFD#PBF

LTC7820 is a fixed ratio high voltage high power switched capacitor/charge pump controller. This device includes four N-channel MOSFET gate drivers to drive external power MOSFETs in voltage divider, doubler or inverter configurations. This device achieves a 2:1 stepdown ratio from an input voltage as high as 72V, a 1:2 step-up ratio from an input voltage as high as 36V, or a 1:1 inverting ratio from an input voltage up to 36V. Each power MOSFET is switched with 50% duty cycle at a constant pre-programmed switching frequency. System efficiency can be optimized to over 99%. It provides a small and cost effective solution for high power, non-isolated intermediate bus applications with fault protection. It is widely used in applications such as bus converters, high power distributed power systems, communications systems, industrial applications etc.

• Low profile, high power density, capable of 500W+
• Soft switching: 99% peak efficiency and low EMI
• Wide bias VCC range is 6V to 72V
• Soft start-up into steady state operation
• 6.5V to 40V EXTVCC input for improved efficiency
• Input current sensing and overcurrent protection
• Output short-circuit/OV/UV protections with programmable timer and retry
• Oscillator frequency range is 1000KHz maximum at (TA = 25°C, VCC = 12V, VRUN = 5V)
• Operating junction temperature is -40°C to 125°C
• Package style is 28-lead plastic QFN

附註

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