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  1. 产品描述
  2. 参数列表
  3. 技术资料
  4. 封装信息
  5. 样品申请

快速搜索

  1. input
  2. Vin(Min)

    Vin(Max)

  3. v

    v

  4. Output
  5. Vout(Max)

    Iout(Max)

  6. v

    A

SCT12A1

2.7V-14V输入,30W高效全集成同步升压DCDC转换器, 具有输出断开控制

特性

• 通(tong)过控制P沟道MOSFET实现对(dui)负(fu)载断开(kai)隔离
• 1uA典型关断电(dian)流
• 宽范围(wei)2.7V-14V输入电压(ya)
• 宽范围4.5V-14.6V输出电压
• 全集成13mΩ 和11mΩ上下功率MOSFET管
• 高达92%的(de)效(xiao)率在 Vin=3.6V, Vout=9V, Iout=3A
• 高达12A功率管开(kai)关电流(liu), 可调峰值限流(liu)阈值
• 可编程200kHz-2.2MHz开关频率
• 可(ke)选PFM和强(qiang)制PWM工作模式
• 可(ke)编程软(ruan)启动时间
• 输(shu)出电(dian)压过压保护阈值 15.4V
• 反馈电(dian)压(ya)过(guo)压(ya)保护 110%的参考(kao)电(dian)压(ya)
• 150°C过温保护
• 3.5mmx4.5mm超扁平20脚DFN封装(zhuang)

描述

SCT12A1是(shi)一款高功(gong)(gong)率(lv)密(mi)度(du)的(de)(de)(de)(de)全(quan)集成(cheng)升压DCDC转换(huan)器(qi)。内部(bu)(bu)集成(cheng)上(shang)下功(gong)(gong)率(lv)MOSFET管(guan),导通(tong)(tong)电(dian)(dian)(dian)阻(zu)为上(shang)管(guan)13mΩ和(he)下管(guan)11mΩ。该(gai)转换(huan)器(qi)可(ke)支持(chi) 2.7V到(dao)14V的(de)(de)(de)(de)宽输(shu)(shu)(shu)入电(dian)(dian)(dian)压范围和(he)最(zui)(zui)大到(dao)14.6V的(de)(de)(de)(de)输(shu)(shu)(shu)出(chu)电(dian)(dian)(dian)压。功(gong)(gong)率(lv)开(kai)关(guan)管(guan)的(de)(de)(de)(de)开(kai)关(guan)电(dian)(dian)(dian)流可(ke)高达12A,并(bing)可(ke)以(yi)通(tong)(tong)过(guo)外接电(dian)(dian)(dian)阻(zu)进行限流阈值(zhi)(zhi)的(de)(de)(de)(de)设置。SCT12A1采用恒定关(guan)断时(shi)间(jian)(jian)峰(feng)值(zhi)(zhi)电(dian)(dian)(dian)流控(kong)制(zhi)(zhi)模(mo)式(shi)实(shi)现(xian)快(kuai)速的(de)(de)(de)(de)动态响应。通(tong)(tong)过(guo)外部(bu)(bu)补偿(chang)网(wang)络可(ke)以(yi)优化环路设计(ji)以(yi)获得在(zai)(zai)(zai)不同负载(zai)(zai)条件下最(zui)(zui)佳的(de)(de)(de)(de)瞬态性能(neng)(neng)。该(gai)转换(huan)器(qi)通(tong)(tong)过(guo)MODE 引脚(jiao)设置脉冲(chong)频(pin)率(lv)调制(zhi)(zhi)模(mo)式(shi)PFM或强制(zhi)(zhi)脉宽调制(zhi)(zhi)模(mo)式(shi)PWM工作(zuo)模(mo)式(shi)。在(zai)(zai)(zai)PWM模(mo)式(shi)下,开(kai)关(guan)频(pin)率(lv)可(ke)以(yi)通(tong)(tong)过(guo)外部(bu)(bu)电(dian)(dian)(dian)阻(zu)设置在(zai)(zai)(zai)200KHz到(dao)2.2MH之间(jian)(jian)。软(ruan)启动时(shi)间(jian)(jian)可(ke)以(yi)通(tong)(tong)过(guo)外部(bu)(bu)电(dian)(dian)(dian)容调节。SCT12A1通(tong)(tong)过(guo)控(kong)制(zhi)(zhi)外部(bu)(bu)P沟道MOSFET实(shi)现(xian)升压转换(huan)器(qi)输(shu)(shu)(shu)出(chu)和(he)负载(zai)(zai)电(dian)(dian)(dian)路的(de)(de)(de)(de)断开(kai)与(yu)隔离,这种(zhong)安(an)全(quan)功(gong)(gong)能(neng)(neng),防止关(guan)断时(shi)输(shu)(shu)(shu)入到(dao)输(shu)(shu)(shu)出(chu)的(de)(de)(de)(de)直通(tong)(tong),以(yi)及输(shu)(shu)(shu)出(chu)对地短路时(shi)损坏(huai)负载(zai)(zai)。SCT12A1通(tong)(tong)过(guo)监控(kong)输(shu)(shu)(shu)出(chu)电(dian)(dian)(dian)压和(he)反馈电(dian)(dian)(dian)压提供(gong)过(guo)压保(bao)护(hu)。在(zai)(zai)(zai)输(shu)(shu)(shu)出(chu)过(guo)载(zai)(zai)时(shi),芯片具有逐个周(zhou)期(qi)限制(zhi)(zhi)峰(feng)值(zhi)(zhi)电(dian)(dian)(dian)流以(yi)及过(guo)热关(guan)断保(bao)护(hu)功(gong)(gong)能(neng)(neng)。该(gai)转换(huan)器(qi)提供(gong)20引脚(jiao)3.5mmx4.5mmx0.9mm的(de)(de)(de)(de)超扁(bian)平DFN封(feng)装,底部(bu)(bu)有增强型功(gong)(gong)率(lv)散(san)热焊(han)盘。 


应用 

蓝牙音响,充电宝(bao)POS机电子烟USB PD 


典型应用框图