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MBI6646 is a step-down constant-current high-brightness LED driver to provide a cost-effective design solution for interior/exterior illumination applications. It is designed to deliver constant current to light up high power LED with only 5 external components. With hysteretic PFM control scheme, MBI6646 eliminates external compensation design and makes the design simple.
The output current of MBI6646 can be programmed by an external resistor and dimmed via pulse width modulation (PWM) or DC voltage through DIM pin to achieve higher efficiency linear current modulation.
MBI6646 features completed protection design to handle faulty situations. The start-up function limits the inrush current while the power is switched on. Under voltage lock out (UVLO), over temperature protection (OTP), and over current protection (OCP) guard the system to be robust and keep the driver away from damage which results from LED open-circuited, short-circuited and other abnormal events. Besides SOT-236 small package, MBI6646 provides thermal-enhanced SOT-89 and SOP-8 packages as well to handle power dissipation more efficiently.
MBI6646 Specification
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ItemsSpec.Content
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01TopologyBuck / Hysteretic PFM
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02Max. Output Current per Channel1A
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03Max. Sustaining Voltage40V
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04Supply Voltage6~36V
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05Switch on Resistance0.6Ω
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06Common Anode
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07Dimming MethodDigital
Analog -
08Protection - LED Open
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09Protection - LED Short
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10Protection - Thermal Shutdown
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11Protection - Start-Up
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12Protection - UVLO
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13Protection - OCP/OCL
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14Protection - Themal Fold-back
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15Protection - OTP Error FLAG
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16Protection - OCP Error FLAG
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17Soft Start-up
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18RoHS Compliant PackageSOP8
SOT89
SOT23 -
19Major ApplicationsMR11, MR16, flood light, PAR light, wall wash light, stage light, panel light, emergency lighting, street light, tunnel lighting, high power LED lighting, automotive lighting
