MBI6904

Macroblock Features Preliminary Datasheet MBI6904 AC/DC LED Controller with 4-step Dimming Capability z Efficiency> 85% when VAC =110V, ILED=100mA, VLED =80V z PWM switching control z 4-step dimming capability z Operation with active power factor correction z THD < 15% when VAC =110V, ILED=100mA, VLED =80V z Full protections: OTP/UVLO/OVP/OCP/LED open-/short-circuit z Current setting accuracy within ±5% z Full range line regulation within 1.7% z Available in SOP-8L package Small Outline Package GD: SOP8L-150-1.27 Product Description MBI6904 is a high efficiency buck-boost AC/DC controller designed to deliver constant output current. The input voltage range of MBI6904 application is universal from 85VAC to 265VAC. It is featured by a PWM control scheme. MBI6904 is designed to operate with active power factor correction (PFC) circuit and is therefore capable of maintaining system power factor greater than 0.9 with proper design. MBI6904 regulates the output current within ±5% of the preset current by well controlling the external MOSFET. In addition, MBI6904 can operate with 4-step dimming. MBI6904 also protects the controller from fault conditions, inclusive of under voltage lock-out (UVLO), over voltage protection (OVP) and over current protection (OCP). To ensure the system reliability, over temperature protection (OTP) is built-in to prevent IC from over temperature (155°C) by turning off the external MOSFET. Once the temperature drops below 125°C, the external MOSFET...