数据搜索系统,热门电子元器件搜索 |
|
LM3550 数据表(PDF) 1 Page - Texas Instruments |
|
LM3550 数据表(HTML) 1 Page - Texas Instruments |
1 / 37 page CIN COUT VIN VOUT C1+ C1- C2+ C2- C1 C2 BAL FET_CON LED- FB SCL SDA STROBE IND VIO LM3550 GND 4.7 PF 2.2 PF 1 PF 1 PF ALD/TEMP C1 = C2 = 1 PF, CIN = 4.7 PF, COUT = 2.2 PF 10V X5R or X7R Super- Capacitor 2.7V to 5.5V RSENSE EOC NTC 4.2 mm 3 mm Current Source Super-Capacitor Charger LM3550 www.ti.com SNVS569B – MAY 2009 – REVISED MAY 2013 LM3550 5A Flash LED Driver with Automatic VLED and ESR Detection for Mobile Camera Systems Check for Samples: LM3550 1 FEATURES 2 • Up to 5A Flash Current • Flash Time-Out Protection • 4 Selectable Super-Capacitor Charge Voltage • LED Temperature Protection or Ambient Light Levels (4.5V, 5.0V, 5.3V, Optimized) Sensing Pin • Flash Optimized Charge Mode for Optimal • Low Profile 20-Pin UQFN Package (3.0 mm × Efficiency 2.5 mm × 0.8 mm) – 33% Faster Charge Time Using Optimal APPLICATIONS Mode • Camera Phones – 49% Less Power Dissipated in Current Source using Optimal Charge Mode • Digital Still Camera • Fast Super-Capacitor Charger with 500 mA • Voltage Rail Management Input Current Limit DESCRIPTION • Adjustable Torch Current (60 mA to 200 mA) LM3550 is a low-noise, switched-capacitor DC/DC • Ambient Light or LED Thermal Sensing with converter designed to operate as a current-limited Current Scaleback and adjustable (up to 5.3V) super-capacitor charger. • End-of-Charge Output (EOC) LM3550 features user-selectable super-capacitor • Dedicated Indicator LED Current Source charge-termination voltages and an optimal charge- termination mode that maximizes flash-energy • No Inductor Required efficiency by accounting for flash element losses. • Manual Flash Enable via Strobe Pin Input Additionally, the device provides one adjustable • Programmable Flash Pulse Duration, and constant current output (up to 200 mA) and one Torch and Flash Currents via I2C-compatible NFET controller ideal for driving one or more high- Interface current LEDs either in a high-power flash mode or a low-power torch mode. • True Shutdown (LED Disconnect) Typical Application Circuit 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 © 2009–2013, 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. |
类似零件编号 - LM3550_13 |
|
类似说明 - LM3550_13 |
|
|
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 |