BD9412F-GE2 ROHM

FAIL 5V BD9412F VCC ON/OFF PWMIN Datasheet PFC Direct current resonance type White LED Driver for Large LCD BD9412F General Description Key Specifications BD9412F is a current resonance type LED Driver with Operating Power Supply Voltage Range: frequency-controlled LED current. It can connect to PFC 9.0V to 18.0V directly and can use half-bridge structure reducing the Oscillator Frequency: 60kHz (R =100k) RT number of external components. Operating Current: 2.3mA (Typ) It incorporates some protection functions against fault Operating Temperature Range: -40C to +85C conditions such as Over-Voltage Protection, LED Short Detection (IS High Detection) and LED Open Detection Package W(Typ) x D(Typ) x H(Max) (IS Low Detection). SOP18 11.20mm x 7.80mm x 2.01mm Pin pitch 1.27mm Features 20V High Rating Process 1 Channel Push-pull Control Current and Voltage Feedback by Driving Frequency Adjustable Soft Start Adjustable Timer Latch Under-Voltage Detection for ICs Power Line Output Over-Voltage Protection Output Error Signal from FAIL Terminal Shift to Save Mode by STB Terminal Burst Control by External PWM Signal Analog Dimming by External DC Signal Conversion Function from Pulse to DC Applications TV, Computer Display, LCD Backlighting. Figure. 1 SOP18 Typical Application Circuit < Primary Side > VCC VCC GND GND PDIM PDIM PVIN STB ON/OFF GND PWM PWMIN ERR FAIL T1 PDIM < Secondary Side > Figure. 2 Typical Application Circuit(s) Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays . www.rohm.com TSZ02201-0F5F0C100070-1-2 2015 ROHM Co., Ltd. All rights reserved. 1/24 TSZ22111 14 001 12.Aug.2015 Rev.002 Not Recommended for New Designs 1 VCC N1 18 2 STB N2 17 PGND 16 3 GND PWM2DC 15 4 RT COMPSD 14 5 FB FAIL 13 6 IS SS 12 7 VS ADIM 11 8 PWMCMP PWM IN 10 9 CPBD9412F Contents General Description .................................................................................................................................................... 1 Features ....................................................................................................................................................................... 1 Applications ................................................................................................................................................................ 1 Key Specifications ...................................................................................................................................................... 1 Package ....................................................................................................................................................................... 1 Typical Application Circuit ......................................................................................................................................... 1 Pin Configuration ........................................................................................................................................................ 3 Physical Dimension and Marking Diagram .............................................................................................................. 3 I/O Equivalent Circuits................................................................................................................................................ 7 Block Diagram ............................................................................................................................................................. 8 Pin Function Description ......................................................................................................................................... 10 Detection Condition List of the Protection Functions .......................................................................................... 15 Behavior List of the Protect Function .................................................................................................................... 15 Application Example ................................................................................................................................................ 16 Timing Chart .............................................................................................................................................................. 17 Operational Notes ..................................................................................................................................................... 20 Ordering Information ................................................................................................................................................ 22 Marking Diagrams ..................................................................................................................................................... 22 Physical Dimension, Tape and Reel Information ................................................................................................... 23 Revision History ....................................................................................................................................................... 24 www.rohm.com TSZ02201-0F5F0C100070-1-2 2015 ROHM Co., Ltd. All rights reserved. 2/24 TSZ22111 15 001 12.Aug.2015 Rev.002 Not Recommended for New Designs