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ADP8861ACPZ-RL 数据表(PDF) 1 Page - Analog Devices |
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ADP8861ACPZ-RL 数据表(HTML) 1 Page - Analog Devices |
1 / 40 page Charge Pump, 7-Channel Smart LED Driver with I2C Interface ADP8861 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother 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 ©2010 Analog Devices, Inc. All rights reserved. FEATURES Charge pump with automatic gain selection of 1×, 1.5×, and 2× for maximum efficiency 7 independent, programmable LED drivers 7 drivers capable of 30 mA (typical) 1 driver also 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 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 TYPICAL OPERATING CIRCUIT D1 D2 D3 D4 D5 D6 D7 VDDIO nRST VDDIO SDA VDDIO SCL VDDIO nINT VIN CIN 1µF GND1 GND2 C2+ C2– C2 1µF C1+ C1– C1 1µF VOUT COUT 1µF ADP8861 Figure 1. GENERAL DESCRIPTION The ADP8861 provides a powerful charge pump driver with independent control of up to seven LEDs. These seven LEDs can be independently driven up to 30 mA (typical). The seventh LED can also be driven to 60 mA (typical). All LEDs are pro- grammable for maximum 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. This entire configuration is driven by a two-capacitor charge pump with gains of 1×, 1.5×, and 2×. The charge pump is capable of driving a maximum IOUT of 240 mA from a supply of 2.5 V to 5.5 V. A full suite of safety features, including short- circuit, overvoltage, and overtemperature protection, allows easy implementation of a safe and robust design. Additionally, input inrush currents are limited via an integrated soft start combined with controlled input-to-output isolation. The ADP8861 is available in a compact lead frame chip scale package (LFCSP). |
类似零件编号 - ADP8861ACPZ-RL |
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类似说明 - ADP8861ACPZ-RL |
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