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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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LP5521 Datenblatt(PDF) 1 Page - Texas Instruments |
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LP5521 Datenblatt(HTML) 1 Page - Texas Instruments |
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1 / 51 page  LP5521 MCU COUT 1 µF CIN 1 µF 0.47 µF CFLY1 CFLY2 SCL SDA CLK_32K INT ADDR_SEL0 ADDR_SEL1 TRIG EN VDD GNDs R G B VOUT CFLY1P CFLY1N CFLY2P CFLY2N RGB LED 0...25.5 mA/LED GPO 0.47 µF Copyright © 2016, Texas Instruments Incorporated Product Folder Sample & Buy Technical Documents Tools & Software Support & Community An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LP5521 SNVS441I – JANUARY 2007 – REVISED NOVEMBER 2016 LP5521 Three-Channel RGB, White-LED Driver With Internal Program Memory and Integrated Charge Pump 1 1 Features 1 • Adaptive Charge Pump With 1× and 1.5× Gain Provides Up to 95% LED Drive Efficiency • Charge Pump with Soft Start and Overcurrent, Short-Circuit Protection • Low Input Ripple and EMI • Very Small Solution Size, No Inductor or Resistors Required • 200-nA Typical Shutdown Current • Automatic Power Save Mode • I2C-Compatible Interface • Independently Programmable Constant Current Outputs with 8-Bit Current Setting and 8-Bit PWM Control • Typical LED Output Saturation Voltage 50 mV and Current Matching 1% • Three Program Execution Engines with Flexible Instruction Set • Autonomous Operation Without External Control • Large SRAM Program Memory • Two General Purpose Digital Outputs 2 Applications • Fun and Indicator Lights • LCD Sub-Display Backlighting • Keypad RGB Backlighting and Phone Cosmetics • Vibra, Speakers, Waveform Generator • Blood Glucose Meter • Handheld POS Terminals • Electronic Access Control • Where RGB Indication is Needed Typical Application Circuit 3 Description The LP5521 is a three-channel LED driver designed to produce variety of lighting effects for mobile devices. A high-efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device has a program memory for creating variety of lighting sequences. When program memory has been loaded, LP5521 can operate autonomously without processor control allowing power savings. The device maintains excellent efficiency over a wide operating range by automatically selecting proper charge pump gain based on LED forward voltage requirements and is able to automatically enter power-save mode, when LED outputs are not active and thus lowering current consumption. Three independent LED channels have accurate programmable current sources and PWM control. Each channel has program memory for creating desired lighting sequences with PWM control. The LP5521 has a flexible digital interface. Trigger I/O and a 32-kHz clock input allow synchronization between multiple devices. Interrupt output can be used to notify processor, when LED sequence has ended. The LP5521 has four pin selectable I2C- compatible addresses. This allows connecting up to four parallel devices in one I2C-compatible bus. GPO and INT pins can be used as a digital control pin for other devices. The LP5521 requires only four small, low-cost ceramic capacitors. Comprehensive application tools are available, including command compiler for easy LED sequence programming. Device Information(1) PART NUMBER PACKAGE BODY SIZE LP5521TM DSBGA (20) 2.093 mm × 1.733 mm (MAX) LP5521YQ WQFN (24) 5.00 mm × 4.00 mm (NOM) (1) For all available packages, see the orderable addendum at the end of the data sheet. |
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Ähnliche Beschreibung - LP5521 |
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