BD555BKFV-E2 ROHM

Datasheet BD555BKFV AC/DC Controller IC for mains dimmable LED lighting BD555BKFV General Description Key Specifications The BD555BKFV controller AC/DC controller IC can be Input voltage range........................................16~39V used in a wide range of dimmable LED lighting driver Regulated supply voltage.................................11.5V applications. The main target application is dimmable Fixed DC/DC operating frequency.........40~400kHz retro-fit LED lighting, replacing existing incandescent Detectable phase-cut range........................45~135 light bulbs, halogen spot lights, CFL tubes etc. Typical current consumption.............................1mA Under Voltage Lock Out detection.....................9.0V Features Operating temperature range.................-40~+110C Fixed frequency DC/DC controller (selectable) Peak current or average current control (PCC/ACC) Package W(Typ.) x D(Typ.) x H(Max.) Dynamic Load Current Controller (DLCC) Logarithmic compensation of detected dimming level SSOP-B14 5.00mm x 6.40mm x 1.15mm Dimmer detector function Anti-flash function when dimmer is OFF PWM and analog dimming control supported Over Current Protection (OCP) Thermal Shutdown protection (TSD) Under Voltage Lock Out (UVLO) Applications Retro-fit dimmable LED lighting (E27, E14, GU10, T8 etc.). Wide range of TRIAC and transistor dimmers supported by DLCC function. Custom LED lighting with PWM or voltage controlled dimming. Typical Application Circuits Figure 1. Typical application circuit for non-isolated dimmable buck topology Product structureSilicon monolithic integrated circuit This product is not designed protection against radioactive rays . www.rohm.com TSZ02201-0W1W0C300010-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/12 30.July.2013 Rev.003 TSZ22111 14 001 DatasheetDatasheet BD555BKFV Pin Configuration Figure 2. Pin configuration Figure 3. Equivalent circuit Pin Description Pin Pin name I/O Function 1 BLDR Out Driver for dynamic load current controller (DLCC) transistor 2 WBLD In Internal strong load current input (connected to internal open drain NMOS) *1 3 ISYS In/Out Sense voltage input for DLCC ON/OFF function 4 GND - Ground terminal 5 DIM In/Out Detected dimming level reference voltage 6 DET In Input for detecting phase-cut angle *2 7 REF Out Pin for external resistor to set LED current (average current control mode) *2 8 OSC Out Pin for external resistor to set DC/DC operating frequency *3 9 FB In Average current feedback input or PCC mode selection (V <1.5V) FB 10 ISNS In Sense voltage for peak current regulation & over current protection (OCP) *4 11 PGND - Ground terminal for internal BLDR and SW driver stages 12 SW Out Driver output for gate of external DC/DC switching MOSFET 13 VDDH In/Out Regulated supply voltage 14 SUP In Input supply voltage *1 Between ISYS and GND are internal anti-parallel surge diodes *2 Connect only resistive load according to application instructions *3 FB terminal is pre-charged to 4V during start-up in order to have smooth start of the LED current regulation. Never connect this pin directly to GND. *4 Between GND and PGND are internal anti-parallel diodes www.rohm.com TSZ02201-0W1W0C300010-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/12 30.July.2013 Rev.003 TSZ22111 15 001