Datasheet Power supply IC series for TFT-LCD panels 12V Input Multi-Channel System Power Supply IC BM81110MUW General Description Key Specifications BM81110MUW is a system power supply for TFT-LCD Input voltage range 8.6V to 14.7V panels used for liquid crystal TVs. This IC is AVDD Output voltage range 13.5V to 19.8V incorporated with Negative and Positive charge pump VIO Output voltage range 2.2V to 3.7V controllers and Gate Pulse Modulation (GPM) function. It VCORE Output voltage range 0.8V to 3.3V also features built-in EEPROM to contain each setting HAVDD Output voltage range 4.8V to 11.1V voltage, soft start time, etc. VGH Output voltage range 20V to 35V VGL Output voltage range -14.5V to -5.5V Features Switching Frequency 750kHz(Typ) Step-up DC/DC converter (AVDD) (Synchronous rectification, built-in load switch) 1MHz(Typ) Step-down DC/DC converter 1 (VIO) Operating temperature range -40 to +85 (Non-synchronous rectification) Step-down DC/DC converter 2 (VCORE) Package W(Typ) x D(Typ) x H(Max) (Synchronous rectification) VQFN40W6060A 6.00mm x 6.00mm x 0.8mm Step-down DC/DC converter 3 (HAVDD) (Synchronous rectification) Positive charge pump controller (VGH) Negative charge pump controller (VGL) Gate Pulse Modulation (GPM) function Output voltage control by I2C Built-in EEPROM Switching Frequency 750kHz (AVDD, VIO) Switching Frequency 1MHz (VCORE, HAVDD) Applications TFT-LCD panel Typical Application Circuit TOP VIEW SW VGH AVDD VIN HAVDD SWB1 EN VGL VGL PGND2 N.C. VCORE SWB2 SWO AVDD VDD2 SWI CTRL SW VIN BM81110MUW VINB2 SW VDD1 PGND SWB1 PGND VIO SWB1 NTC N.C. VL VIN Figure1. Application Circuit Product structureSilicon monolithic chip This chip has no designed protection against radioactive rays. w ww.rohm.com TSZ02201-0313AAF00410-1-2 2014 ROHM Co., Ltd. All rights reserved. 1/46 TSZ2211114001 2015.08.10 Rev.002 VINB1 VDD3 VINB1 PGND3 FAULT SWB3 SDA N.C. SCL VINB3 A0 RE HVS VGHM AVIN VGH AGND DRVP COMP DRVNBM81110MUW Contents General Description ........................................................................................................................................................................ 1 Features.......................................................................................................................................................................................... 1 Applications .................................................................................................................................................................................... 1 Typical Application Circuit ............................................................................................................................................................... 1 Key Specifications ........................................................................................................................................................................... 1 Package .................................................................................................................................................................................. 1 Pin Configuration ......................................................................................................................................................................... 3 Block Diagram (VGH Doubler) ........................................................................................................................................................ 4 Block Diagram (VGH Trippler) ........................................................................................................................................................ 5 Description of each Block ............................................................................................................................................................... 6 Absolute Maximum Ratings ............................................................................................................................................................ 7 Recommended Operating Conditions ......................................................................................................................................... 7 Electrical Characteristics ............................................................................................................................................................. 8 Typical Performance Curves ..................................................................................................................................................... 11 Timing Chart ................................................................................................................................................................................. 21 Example ApplicationVGH Doubler ......................................................................................................................................... 22 Example Application VGH Trippler .......................................................................................................................................... 23 Protection function explanation of each block ............................................................................................................................... 24 Protection function list ................................................................................................................................................................... 26 Upper limit voltage setting of VGH thermal compensation ............................................................................................................ 27 FAULT function ............................................................................................................................................................................. 27 Serial transmission ....................................................................................................................................................................... 28 Register Map ................................................................................................................................................................................ 31 Command Table ............................................................................................................................................................................ 32 Selecting Application Components ............................................................................................................................................... 33 Layout Guideline ............................................................................................................................................................................. 38 Power Dissipation ......................................................................................................................................................................... 38 I/O Equivalence Circuit ................................................................................................................................................................. 39 Operational Notes ......................................................................................................................................................................... 42 Ordering Information ..................................................................................................................................................................... 44 Marking Diagram .......................................................................................................................................................................... 44 Physical Dimension Tape and Reel Information ............................................................................................................................ 45 Revision History ............................................................................................................................................................................ 46 www.rohm.com TSZ02201-0313AAF00410-1-2 2014 ROHM Co., Ltd. All rights reserved. 2/46 TSZ22111 15 001 2015.08.10 Rev.002