Press release 意法半导体（ ）突破 LED 相机闪光灯极限 意法半导体（ST） 超级电容 LED 闪光灯/手电筒双模式闪光灯控制器改进传统相机模块架构, 提供泛光灯级别的光线强度 中国， 中国，2012 年 2 月 13 日 —— 横跨多重电子应用领域的全球领先的半导体供应商意法半 导体（STMicroelectronics，简称 ST；纽约证券交易所代码：STM）将让尺寸紧凑的数码 相机和智能手机能够满足用户提高内置闪光灯输出功率的要求，同时支持更先进的用户控 制功能。 意法半导体的新芯片 STCF04 是一个内置的闪光灯/手电筒双模式相机闪光灯控制器，能够 把 LED 闪光灯模块的最大功率从今天一般的几瓦功率设计提高到 40W 以上，发出户外安 全泛光灯级别的亮度。新产品还可提供更多的闪光灯和手电筒亮度控制功能，闪光灯模式 有 8 个用户可选亮度，手电筒模式有 12 个用户可选亮度，并提供一个光线传感器输入。 控制器芯片内置闪光灯和手电筒安全计时器、温度传感器和短路保护功能。 STCF04 采用意法半导体独有的架构设计，整合 1 个超级电容、1 个高电流 MOSFET 开关 分立器件和多支大功率白光 LED 灯，是高亮度应急闪光灯以及相机和相机手机闪光灯的理 想选择。 MOSFET 分立器件是 STCF04 的功率高于同类产品的关键所在，因为其它品牌的控制器 只集成一个小功率的 MOSFET。新产品让设计人员能够用 LED 闪光灯替代传统的大功率 氙闪光灯（xenon flash），以满足当今的高像素相机传感器对更高光能的要求，同时还具 有设计紧凑且简单的优势。 意法半导体已开始向两大主 要合作伙伴 村田（MURATA） 和欧司朗（OSRAM）提供 STCF04 样片。株式会社村田制作所是市场领先的超级电容制造商，欧司朗则是全球领先 的智能手机闪光灯模组供应商，这两家公司已开始展示使用该芯片的最新产品。 STCF04 主要特性 主要特性： • 最大闪光灯功率 >40W • 手电筒模式电流（torch current）：1 x 320mA • 100mA 红光 LED 隐私指标灯输出；12 级调节 • 地址可选 I2C 总线 • 温度传感、短路关闭、过压保护和闪光灯/手电筒模式计时器安全功能 STCF04 采用 25 个焊球 3 x 3mm TFBGA 封装，目前已可提供样片。预计于 2012 年第一 季度开始量产。 - 关于意法半导体 意法半导体（STMicroelectronics；ST）是全球领先的半导体解决方案供应商，为传感及 功率技术和多媒体融合应用领域提供创新的解决方案。从能源管理和节能技术，到数字信 任和数据安全，从医疗健身设备，到智能消费电子，从家电、汽车，到办公设备，从工作 到娱乐，意法半导体的微电子器件无所不在，在丰富人们的生活方面发挥着积极、创新的 作用。意法半导体代表着科技引领智能生活(life.augmented)的理念。 意法半导体 2011 年净收入 97. 3 亿美元。详情请访问公司网站 www.st.com。 STCF04 High power white LED SuperCap driver with I²C interface Data brief Features ■ 1.8 MHz buck-boost converter with 1.2 A peak current limiting and synchronous rectification ■ Programmable current limit ■ Burst mode operation when output is charged ■ Selectable 200 mA / 400 mA SuperCap charging current TFBGA25 (3 x 3 mm.) ■ Input voltage range 2.7 V to 5.5 V ■ Programmable output charging voltage up to 5.5 V Applications ■ Full I²C control ■ Cell phones and smartphones ■ Operation modes: – Shutdown mode – Monitoring mode with NTC and SuperCap monitoring – Idle mode – Flash mode – Torch mode: up to 300 mA ■ Camera flash/strobe ■ PDAs and digital still cameras Description The STCF04 is a dedicated and space optimized high efficiency solution for driving a flash LED module in camera phones, PDAs and other handheld devices using the SuperCap technology. It is based on a DC-DC buck-boost converter, which ensures proper and efficient charging control and monitoring of the SuperCap within the entire battery voltage range. The output current control ensures good current regulation over the forward voltage spread characteristics of the flash LEDs in torch and flash mode operation. The SuperCap charging current is programmed to a defined value which avoids overload of the battery. The SuperCap discharge current flows through the LEDs and the external MOSFET which must be chosen according to the desired flash current. See Description (continued). ■ Controlled LED current in all modes ■ Soft and hard triggering of flash, torch and picture light modes ■ Torch dimming in 12 exponential steps ■ Flash dimming in 8 steps ■ Torch mode safety time-out ■ Active balancing of SuperCap voltage ■ SuperCap status flag ■ Internally or externally timed flash operation ■ Digitally programmable safety time-out in flash mode ■ LED overtemperature detection and protection with external NTC resistor ■ Shorted LED failure detection and protection ■ Chip overtemperature detection and protection Table 1. Device summary March 2009 Order code Package Packaging STCF04TBR TFBGA25 (3 x 3 mm.) 3000 parts per reel Rev 1 For further information contact your local STMicroelectronics sales office. 1/7 www.st.com 7 Description (continued) 1 STCF04 Description (continued) All the functions of the device are controlled through the I²C bus which reduces the number of logic pins of the package and saves PCB tracks on the application board. Hard and softtriggering of flash and torch are both supported. The device includes many functions to protect the chip and the power LEDs. These include a soft-start control, chip overtemperature detection and protection, shorted LEDs detection and protection. In addition, a digital programmable time-out function protects the LEDs in case of a wrong command issued by the microprocessor. An optional external NTC is supported to protect the LEDs against overheating. It is possible to separately program the current intensity in flash and torch mode by I²C. In order to guarantee the proper function of flash mode, the SuperCap voltage should be monitored by the microprocessor using the READY pin feature. In case of insufficient power from the SuperCap, a warning is generated. The device is packaged in 3 x 3 mm BGA package with a 1 mm height. 2/7 Package mechanical data 2 STCF04 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark. 3/7 Package mechanical data STCF04 TFBGA25 mechanical data mm. mils. Dim. A Min. Typ. Max. Min. Typ. Max. 1.0 1.1 1.16 39.4 43.3 45.7 A1 0.25 A2 0.78 b 0.25 D 2.9 D1 E 9.8 0.86 30.7 0.30 0.35 9.8 11.8 13.8 3.0 3.1 114.2 118.1 122.0 2 2.9 3.0 33.9 78.8 3.1 114.2 118.1 E1 2 78.8 e 0.5 19.7 SE 0.25 9.8 122.0 7539979/A 4/7 Package mechanical data STCF04 Tape & reel TFBGA25 mechanical data mm. inch. Dim. Min. Typ. A Min. Typ. 330 13.2 Max. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 5/7 Max. 0.504 0.519 14.4 0.567 Ao 3.3 0.130 Bo 3.3 0.130 Ko 1.60 0.063 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 Revision history 3 STCF04 Revision history Table 2. Document revision history 6/7 Date Revision 24-Mar-2009 1 Changes Initial release. STCF04 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. 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