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MBI6653 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 6 external components. With hysteretic PFM control scheme, MBI6653 eliminates external compensation design and makes the design simple.
The output current of MBI6653 can be programmed by an external resistor and dimmed via pulse width modulation (PWM) through PWMD pin. In addition, a novel fixed frequency analog dimming method is proposed and offered by the device. Users can achieve higher efficiency linear current modulation from 5% to 100% of preset current by applying either PWM-controlled or DC voltage-controlled brightness modulation.
MBI6653 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 being damaged which results from LED open-circuited, short-circuited and other abnormal events. MBI6653 provides thermal-enhanced MSOP-8 and SOP-8 packages as well to handle power dissipation more efficiently.
MBI6653 Specification
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ItemsSpec.Content
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01TopologyBuck
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02Max. Output Current per Channel1A
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03Max. Sustaining Voltage65V
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04Supply Voltage4.6~65V
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05Switch on Resistance0.3Ω
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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
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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
