16V输入电压降压DC/DC控制器CXSD62187输出电流高达3A的电源低ESR电容内置的UVLO (欠压锁闭)功能 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
目录7.相关产品 产品概述 返回TOP CXSD62187系列是多用途,降压DC/DC控制器IC。给该芯片外围配置一个开关管,一个电感,一个二级管和两个电容就可获得一个高效,稳定的,输出电流高达3A的电源。 可使用低ESR电容比如陶瓷电容作为它的输出电容。CXSD62187系列有一个0.9V (±1.5%)参考电压,使用外接分压电阻就可以自由设定输出电压。开关频率为300kHz,500kHz和1MHz,可使用小型外围器件。关于软启动时间, CXSD62187A 和C系列都是内部设定为4毫秒,CXSD62187B和D系列可在外部设定。具有内置的UVLO (欠压锁闭)功能,当输入电压低至2.3V 或更低的时候,外部的P沟道开关管会被强制关断.The CXSD62187/CXSD62188 series is a group of multi-purpose step-down DC/DC controller ICs. The ICs enable a high efficiency, stable power supply with an output current up to 3A to be configured using only a transistor, a coil, a diode, and two capacitors connected externally. Low ESR capacitors such as a ceramic capacitor can be used as an output capacitor. The CXSD62187/CXSD62188 series has a 0.9V (±1.5%) reference voltage, and using externally connected resistors, the output voltage can be set freely. With an internal switching frequency of 300kHz and 500kHz 1.0MHz, small external components can also be used. The CXSD62187 series is PWM control, and the CXSD62188 series is PWM/PFM mode, which automatically switches from PWM to PFM during light loads and high efficiencies can be achieved over a wide range of load conditions. As for the soft-start time, the CXSD62187/CXSD62188A and C series is internally set to 4msec and the CXSD62187/CXSD62188B and D series can be externally set-up. With the built-in UVLO (Under Voltage Lock Out) function, the external P-channel driver transistor is forced OFF when input voltage becomes 2.3V or lower 产品特点 返回TOP 应用范围 返回TOP ●Set top boxes ●Digital TVs ●DVD / HDD recorders ●Smart phones / Mobile phones ●Note PCs / Tablet PCs 技术规格书(产品PDF) 返回TOP 需要详细的PDF规格书请扫一扫微信联系我们,还可以获得免费样品以及技术支持! 产品封装图 返回TOP 电路原理图 返回TOP
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