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LM3553 Arkusz danych(PDF) 1 Page - Texas Instruments |
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LM3553 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 26 page LM3553 2.2 PH COUT 4.7 PF CIN 10 PF ISET RSET SCL SDA VIO GND VIN D1 OVP SW TX FEN D2 M/F 600 mA Flash Current Components: L = Toko FDSE0312-2R2M CIN = Murata GRM188R60J106ME47D COUT = Murata GRM21BR61E475KA12L LEDs = Lumileds LXCL ± PWF3 Or equivalent 29.25mm 2 with 0.4mm spacing around large components (IC and L) 9.0 9.0 2.25 0.5 2.5 L IC CIN D1 COUT RSET LM3553 www.ti.com SNVS414B – FEBRUARY 2008 – REVISED MAY 2013 LM3553 1.2A Dual Flash LED Driver System with I2C Compatible Interface Check for Samples: LM3553 1 FEATURES • Multi-Function Pin (RESET and GPIO) • Low Profile 12-pin WSON Package 2 • Accurate and Programmable LED Current up (DQB0012A: 3mm x 3mm x 0.8mm, 0.4mm to 1.2A in 128 Steps pitch) • Total Solution Size < 30mm2 • 90% Peak Efficiency APPLICATIONS • Drives 2 LEDs in Series with 1.2A from 5V • Camera Phone LED Flash Input • Smartphone and PDA Flash • Drives 2 LEDs in Series with 600mA from 3.0V • LED Backlight Input • Drives 1 LED with 1.2A from 3.0V Input DESCRIPTION • Adjustable Over-Voltage Protection Allows for The LM3553 is a fixed frequency, current mode step- Single or Series LED Operation up DC/DC converter with two regulated current sinks. • Four Operating Modes: Torch, Flash, Indicator, The device is capable of driving loads up to 1.2A and Voltage Mode (4.98V) from a single-cell Li-Ion battery. • Programmable Flash Pulse Safety Timer in 16 The LM3553 includes a TX pin that forces Torch Steps mode during a flash event allowing for synchronization between the RF power amplifier and • TX Input Ensures Synchronization with RF Flash/Torch modes. It also includes a multi-function Power Amplifier Pulse or Prevents LED from pin (M/F) that can serve as a GPIO and a hardware Overheating RESET pin. • LED Disconnect During Shutdown The LM3553 is available in a 3mm by 3mm package. • Flash/Imager Synchronization via FEN Pin • Active Low Hardware Reset Typical Application Circuits Figure 1. Figure 2. Solution Size 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2008–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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