BD81842MUV-ME2

Datasheet Power Supply IC Series for TFT-LCD Panels Automotive Panel Power Management IC BD81842MUV-M Applications General Description TFT-LCD Panels which are used in car navigation, The BD81842MUV-M is a power management IC for in-vehicle center panel, and instrument cluster. TFT-LCD panels which are used in car navigation, in-vehicle center panel, and instrument cluster. Features Incorporates high-power FET with low on resistance for (Note 1) large currents that employ high-power packages, thus AEC-Q100 Qualified driving large current loads while suppressing the Boost DC/DC converter 18 V / 2.5 A switch current. generation of heat. A charge pump controller is Switching frequency: 2.1 MHz Operational Amplifier (short current 200mA) incorporated as well, thus greatly reducing the number of application components. Also Gate Shading Function Incorporates Positive / Negative Charge-pump is included. Controllers. Gate Shading Function Protection circuits: Key Specifications Under Voltage Lockout Input voltage range : 2.0V to 5.5V Protection Circuit AVDD Output voltage range : 6.0V to 18V Thermal Shutdown Circuit (Latch Mode) SRC Output voltage range : 12V to 34V Over Current Protection Circuit (AVDD) VCOM Output current : 200mA (Typ.) Timer Latch Mode Short Circuit Protection (AVDD Oscillator Frequency : 2.1MHz (Typ.) SRC /VGL) Operating temperature range : -40 to +105 Over / Under Voltage Protection Circuit for Boost DC/DC Output Special Characteristics No SCP time included (185ms from UVLO-off) FB Regulation voltage : 3% (Ta=-40105) (Note1: Grade 2) Oscillator Frequency : 10.5% (Ta=-40105) Package W(Typ.) x D(Typ.) x H(Max.) Typical Application Circuit (TOP VIEW) VQFN24SV4040 4.0mm x 4.0mm x 1.0mm TDK VIN SLF7055T-100M2R5(10H,2.5A) 10V/0.5Amax RSX301LA-30 10uF 10uF AVDD AVDD 10uF 10uF 10uF 1k 18k 33nF SRC GSOUT 24 23 22 21 20 19 22k 91k 1 18 INP PGND 2 5.5V 17 13k INN FB VCOM 3 16 VCOM COMP 24k 4 1uF 15 AGND1 RSTIN AVDD 10k 10k 2.2nF 5 14 AVDD AGND2 DA227 6 DRP VIN 13 VIN 0.1uF 3.3V 1uF 78 9 10 11 12 0.1uF 0.1uF 10k DA227 CTL RST 20V/20mA max 1uF SRC 16k 0.22F 0.1uF 120k 150k 10k 1uF VGL DA227 -7.1V/20mA max 1uF Figure 1. Application Circuit Product structureSilicon monolithic integrated circuit This product is not designed for protection against radioactive rays www.rohm.com TSZ02201-0313AAF00540-1-2 2015 ROHM Co., Ltd. All rights reserved. 1/31 23. Jun. 2016 Rev.002 TSZ2211114001 DRN DLY CTL SRC RST GSOUT FBP RE FBN SW VREF PGNDDatasheetDatasheet BD81842MUV-M Contents General Description .................................................................................................................................................................. 1 Key Specifications .................................................................................................................................................................... 1 Special Characteristics ............................................................................................................................................................. 1 Applications ............................................................................................................................................................................... 1 Features ..................................................................................................................................................................................... 1 Pin Configuration ...................................................................................................................................................................... 3 Pin Descriptions ........................................................................................................................................................................ 3 Block Diagram ........................................................................................................................................................................... 4 Main Block Function ................................................................................................................................................................. 5 Absolute Maximum Ratings ..................................................................................................................................................... 6 Thermal Resistance .................................................................................................................................................................. 6 Recommended Operating Range ............................................................................................................................................. 6 Electrical characteristics .......................................................................................................................................................... 7 Electrical characteristic curves ............................................................................................................................................... 9 Application Example ............................................................................................................................................................... 15 Power Sequence ..................................................................................................................................................................... 16 Protect Operation .................................................................................................................................................................... 17 Reset Function ........................................................................................................................................................................ 17 Gate Shading Function ........................................................................................................................................................... 18 How to select parts of application ......................................................................................................................................... 19 PCB Layout Guide ................................................................................................................................................................... 24 I/O Equivalent Circuit Diagrams ............................................................................................................................................. 26 Operation Notes ...................................................................................................................................................................... 27 Ordering Information .............................................................................................................................................................. 29 Marking Diagrams ................................................................................................................................................................... 29 Physical Dimension, Tape and Reel Information .................................................................................................................. 30 Revision History ...................................................................................................................................................................... 31 www.rohm.com TSZ02201-0313AAF00540-1-2 2015 ROHM Co., Ltd. All rights reserved. 2/31 23. Jun. 2016 Rev.002 TSZ2211115001