数据搜索系统,热门电子元器件搜索 |
|
ADP8860ACBZ-R7 数据表(PDF) 1 Page - Analog Devices |
|
ADP8860ACBZ-R7 数据表(HTML) 1 Page - Analog Devices |
1 / 52 page Charge Pump, 7-Channel Smart LED Driver with I2C Interface ADP8860 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalog Devices foritsuse,nor for anyinfringements ofpatents orother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2009 Analog Devices, Inc. All rights reserved. FEATURES Charge pump with automatic gain selection of 1×, 1.5×, and 2× for maximum efficiency Up to two built-in comparator inputs with programmable modes for ambient light sensing Outdoor, office, and dark modes for maximum backlight power savings 7 independent and programmable LED drivers 6 drivers capable of 30 mA (typical) 1 driver capable of 60 mA (typical) Programmable maximum current limit (128 levels) Standby mode for <1 μA current consumption 16 programmable fade in and fade out times 0.1 sec to 5.5 sec Choose from linear, square, or cubic rates Fading override I2C-compatible interface for all programming Dedicated reset pin and built-in power-on reset (POR) Short-circuit, overvoltage, and overtemperature protection Internal soft start to limit inrush currents Input-to-output isolation during faults or shutdown Operation down to VIN = 2.5 V with undervoltage lockout (UVLO) at VIN = 2.0 V Small wafer level chip scale package (WLCSP) or lead frame chip scale package (LFCSP) APPLICATIONS Mobile display backlighting Mobile phone keypad backlighting Dual RGB backlighting LED indication General backlighting of small format displays GENERAL DESCRIPTION The ADP8860 combines a programmable backlight LED charge pump driver with automatic phototransistor control. This combi- nation allows for significant power savings because it changes the current intensity in office and dark ambient light conditions. By performing this function automatically, it eliminates the need for a processor to monitor the phototransistor. The light intensity thresholds are fully programmable via the I2C® interface. A second phototransistor input, with dedicated comparators, improves the ambient light detection levels for various user operating conditions. TYPICAL OPERATING CIRCUIT V D3 D1 E3 D2 E4 D3 D4 D4 C4 D5 B4 D6/ CMP_IN2 B3 D7 ALS VOUT OPTIONAL PHOTOSENSOR PHOTOSENSO C3 CMP_IN R 0.1µF 0.1µF VIN A3 1µF E1 VDDIO nRST C2 VDDIO SDA E2 VDDIO SCL D2 VDDIO nINT A4 GND1 D1 GND2 B1 C2+ B2 C2– C2 1µF A1 C1+ C1 C1– C1 1µF VOUT A2 ADP8860 1µF Figure 1. The ADP8860 allows as many as six LEDs to be independently driven up to 30 mA (typical). A seventh LED can be driven to 60 mA (typical). All LEDs are programmable for minimum/max- imum current and fade in/out times via the I2C interface. These LEDs can also be combined into groups to reduce the processor instructions during fade in/out. Driving this entire configuration is a two-capacitor charge pump with gains of 1×, 1.5×, and 2×. This setup is capable of driving a maximum IOUT of 240 mA from a supply of 2.5 V to 5.5 V. The device includes a variety of safety features including short-circuit, overvoltage, and overtemperature protection. These features allow easy implementation of a safe and robust design. Addi- tionally, input inrush currents are limited via an integrated soft start combined with controlled input-to-output isolation. The ADP8860 is available in two package types, either a compact 2 mm × 2.4 mm × 0.6 mm WLCSP (wafer level chip scale package) or a small LFCSP (lead frame chip scale package). |
类似零件编号 - ADP8860ACBZ-R7 |
|
类似说明 - ADP8860ACBZ-R7 |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |