Product Summary

The MBI6661 is a high efficiency, constant current and step-down DC/DC converter. The MBI6661 is designed to deliver constant current to light up high power LED with minimum 5 external components. By hysteretic PFM control scheme, the MBI6661 omits the external compensation design. The applications of the MBI6661 include signage and decorative LED lighting, Automotive LED lighting, high power LED lighting, and constant current source.

Parametrics

MBI6661 absolute maximum ratings: (1)Supply voltage: 0 to 75V; (2)Output current: 1.2A; (3)Sustaining voltage at SW pin: 1.2A; (4)GND Terminal Current: 1.2A; (5)Power dissipation: 3.80W; (6)Operating Juntion temperating: 150℃; (7)Operating temperature: -40 to 125℃; (8)Storage temperature: -55 to 150℃.

Features

MBI6661 features: (1)Maximum 1A constant output current; (2)97% efficiency@input voltage 48V, loading condition 350mA, 12LEDs in series; (3)9 to 60V wide input voltage range; (4)Hysteretic PFM eliminates external compensation design; (5)Settable constant output current; (6)Integrated power switch with 0.35ohm low Rds(on); (7)Full protections; (8)Only 5 external components required.

Diagrams

MBI6661 block diagram