The PAM2861 is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device operates from an input supply between 6V and 40V and provides an externally adjustable output current of up to 1A. Depending upon supply voltage and external components, this can provide up to 30 watts of output power.
The PAM2861 includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current.
Output current can be adjusted below the set value, by applying an external control signal to the VSET pin.
The VSET pin will accept either a DC voltage or a PWM waveform.
The soft-start time can be increased using an external capacitor from the VSET pin to ground. Applying a voltage of 0.2V or lower to the VSET pin turns the output off and switches the device into a low current standby state.
特點:
Simple Low Parts Count
Internal 40V NDMOS Switch
1A Output Current
Single Pin On/Off and Brightness Control Using DC Voltage or PWM
Soft-Start
High Efficiency (up to 97%)
Wide Input Voltage Range: 6V to 40V
Output Shutdown
Open LED Protection
Short LED Protection
Up to 1MHz Switching Frequency
Inherent Open-Circuit LED Protection
Typical 5% Output Current Accuracy
Pb-free TSOT25 and SOT89-5 Packages
應用:
Low voltage halogen replacement LEDs
Low voltage industrial lighting
LED back-side lighting
Illuminated signs
全球領先的高性能傳感器解決方案供應商艾邁斯半導體公司(ams AG)今日推出新品PCap04,一款可配置的電容式傳感前端,使傳感器制造商能夠平衡速度和分辨率以匹配他們的設計需求。
優化速度時,PCap04可以捕獲每秒高達50,000次的傳感器測量值并將其轉為數字化。當采樣速度較慢以優化精度時,PCap04可以實現8aF的測量分辨率。
設備的可配置性也使得傳感器制造商在測量速度與功耗之間取得良好的權衡。在低功耗模式下,PCap04僅需4.0μA的低電流。艾邁斯半導體已經開發了一款無外部電源的演示板,其中PCap04依靠從手機等NFC閱讀器產生的RF場域中采集的能量運行。
PCap04 IC適用于任何電容產生變化的傳感元件。該器件具有6個電容測量通道,非常適合與其它傳感元件搭配使用,如測量壓力、力量、位置、傾斜、濕度、重量、水平及其它傳感參數。
PCap04的輸出可以將原始測量電容值以PWM或PDM展示。該器件還具備DSP,幫助處理傳感器測量值,并通過I2C或SPI接口將其轉換成數字值。它可以處理廣泛的輸入電容值,低至1pF,高達100nF。
PCap04提供各種內置可配置選項,包括支持接地、浮動、差分和差動接地傳感器連接。DSP可以運行艾邁斯半導體開源代碼及用戶生成代碼,以實現測量值線性化和轉換等功能。艾邁斯半導體提供評估套件及易于掌握的軟件開發工具,以便設計工程師在PCap04上開發、測試和調試代碼運行。
艾邁斯半導體醫療及特殊傳感器營銷總監Jose Vinau表示:“PCap04為傳感器制造商針對當今市場上固定運行特性的其它傳感器前端提供靈活的替代選擇。該器件提供的獨特優勢能夠使傳感器制造商通過調整傳感器前端的運行來滿足其特定應用的需求。”
公司:深圳市哲瀚電子科技有限公司
聯系人:陳小姐
手機:13714441972
電話:0755-82549527/83259945/13714441972
傳真:0755-83259945
地址:深圳市福田區深圳市福田區華強北街道深南中路3006號佳和大廈3C006