BD555BKFV-E2

Datasheet BD555BKFV AC/DC Controller IC for mains dimmable LED lighting BD555BKFV ●Key Specifications  Input voltage range........................................16~39V  Regulated supply voltage.................................11.5V  Fixed DC/DC operating frequency.........40~400kHz  Detectable phase-cut range........................45°~135°  Typical current consumption.............................1mA  Under Voltage Lock Out detection.....................9.0V  Operating temperature range.................-40~+110°C ●General Description The BD555BKFV controller AC/DC controller IC can be used in a wide range of dimmable LED lighting driver applications. The main target application is dimmable retro-fit LED lighting, replacing existing incandescent light bulbs, halogen spot lights, CFL tubes etc. ●Features  Fixed frequency DC/DC controller (selectable)  Peak current or average current control (PCC/ACC)  Dynamic Load Current Controller (DLCC)  Logarithmic compensation of detected dimming level  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) ●Package SSOP-B14 W(Typ.) x D(Typ.) x H(Max.) 5.00mm x 6.40mm x 1.15mm ●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 structure：Silicon monolithic integrated circuit .www.rohm.com © 2013 ROHM Co., Ltd. All rights reserved. TSZ22111・14・001 ○This product is not designed protection against radioactive rays 1/12 TSZ02201-0W1W0C300010-1-2 30.July.2013 Rev.003 Datasheet BD555BKFV ●Pin Configuration Figure 2. Pin configuration Figure 3. Equivalent circuit ●Pin Description Pin Pin name I/O 1 BLDR Out 2 WBLD In 3 ISYS *1 4 GND - 5 DIM In/Out 6 DET 7 8 REF In Driver for dynamic load current controller (DLCC) transistor Internal strong load current input (connected to internal ‘open drain’ NMOS) Sense voltage input for DLCC ON/OFF function Ground terminal Detected dimming level reference voltage Input for detecting phase-cut angle *2 Out Pin for external resistor to set LED current (average current control mode) *2 Out Pin for external resistor to set DC/DC operating frequency OSC *3 9 FB 10 ISNS *4 11 PGND 12 SW 13 VDDH 14 SUP *1 *2 *3 *4 In/Out Function In Average current feedback input or PCC mode selection (VFB