MBI6651 Datasheet | Macroblock

Macroblock Step-Down, 1A LED Driver Features z 1A constant output current z 96% efficiency @ input voltage 12V, 350m A, 3-LED z 9~36V input voltage range z Hysteretic PFM improves efficiency at light loading Surface Mount Device z Settable output current z Integrated power switch with 0.45ohm low Rds(on) z Full protection: Thermal/UVLO/Start-Up/LED Open-/Short- Circuit z Only 4 external ponents required GPSSDD: TO-252-5L Product Description Small Outline Transistor The MBI6651 is a high efficiency, constant current and step-down DC/DC converter. It is designed to deliver constant current to light up high power LED with only 4 external ponents. With hysteretic PFM control scheme, MBI6651 improves the efficiency of light loading. The output current of MBI6651 can be programmed by an external resistor and LED dimming can be controlled via pulse width modulation (PWM) through DIM pin. In addition, the start-up function limits the inrush current while the power is switch on. The MBI6651 also Features under voltage lock out (UVLO), over temperature protection, LED open-circuit protection and LED short-circuit protection to protect IC from being damaged. Additionally, to ensure the system reliability, the MBI6651 builds thermal protection (TP) function inside. This function protects IC from overheating (165°C) in various application conditions. MBI6651 provides thermalenhanced packages as well to handle power dissipation more efficiently. MBI6651 is available in TO-252, SOT-23 and MSOP-8 packages. GST: SOT-23-6L Mini Small Outline Package GMS: MSOP-8L-118mil Applications z Signage and Decorative LED Lighting z Automotive LED Lighting z High Power LED Lighting z Constant Current Source ©Macroblock, Inc. 2011 Floor 6-4, No.18, Pu-Ting Rd., Hsinchu, Taiwan 30077, ROC. TEL: +886-3-579-0068, FAX: +886-3-579-7534 E-mail: info@mblock..tw - 1 - July 2011, VA.00 Typical Application Circuit Step-Down, 1A LED Driver CIN: VISHAY,...