AX9370 Datasheet | AXElite

AX9370 Universal High Brightness Led Driver  GENERAL DESCRIPTION The AX9370 is a high performance LED lighting controller with PFC integrated which uses primary-side-control to eliminate opto-coupler and simplify the LED lighting driving system. AX9370 removes the need for secondary feedback circuitry while achieving excellent line regulation. AX9370 integrates power factor correction function and works in boundary conduction mode (BCM) which can minimize the switching loss, thus increasing efficiency. In a flyback circuit with the controller AX9370 at BCM operation can also reduce choke variation and enhance the LED current accuracy for line input voltage variation and output voltage variation. pared with a traditional LED driver IC, AX9370 can achieve the PF>0.95 and provide accurate constant current <±5% in a universal input voltage range (90VAC~264VAC). Thus AX9370 is designed for lowering total costs, size, and ponents while simultaneously increasing efficiency and system reliability.  Features Primary-side Feedback Constant Current Control Universal Rectified 90VAC to 264VAC Input Voltage Range Boundary Conduction Mode (BCM) Operation with PFC (>0.95) Constant Current Control LED Driver (<±5%) Built-in Secondary Short Circuit Protection and Secondary Open Circuit Protection. Line pensation Output Voltage pensation LED Series/Parallel binations SOT-23-6L Package Available 1/12 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.1 Dec.25, 2012  BLOCK DIAGRAM 5V Regulator Duty Control DMG 4.8V + ZCD Tp SSP Figure 1  PIN ASSIGNMENT The package of AX9370 is SOT-23-6L; the pin assignment is given by: Name Description CS Current sense SOT-23-6L Ground return for all internal GND circuitry GAT Gate driver output 1 CS VIN 6 Power supply pin for all internal VDD circuit DMG 5 2 GND This pin is zero current DMG demagnetization sensing for transition-mode operation 3 GAT VDD 4...