目录dvK嘉泰姆

1.产品概述                       2.产品特点dvK嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 dvK嘉泰姆
5.产品封装图                     6.电路原理图                   dvK嘉泰姆
7.功能概述                        8.相关产品dvK嘉泰姆

 dvK嘉泰姆

一,产品概述(General Description)      dvK嘉泰姆

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencydvK嘉泰姆
over a wide output current load range.dvK嘉泰姆

      This device offers two operation modes,PWM control and PFM ModedvK嘉泰姆
switching control, which allows a high efficiency over the wider range of thedvK嘉泰姆
load.The  rber of readily available standard external components and isdvK嘉泰姆
available in an 6-pin SOT23 ROHS compliant package.dvK嘉泰姆

二.产品特点(Features)dvK嘉泰姆

* High Efficiency: Up to 95%dvK嘉泰姆
* 600KHz Frequency OperationdvK嘉泰姆
* 2.0A Output CurrentdvK嘉泰姆
* No Schottky Diode RequireddvK嘉泰姆
* 3.5V to 18V Input Voltage RangedvK嘉泰姆
* 0.6V ReferencedvK嘉泰姆
 Slope Compensated Current ModedvK嘉泰姆
 Control for Excellent Line and LoaddvK嘉泰姆
 Transient ResponsedvK嘉泰姆
* Integrated internal compensationdvK嘉泰姆
* Stable with Low ESR Ceramic OutputdvK嘉泰姆
   CapacitorsdvK嘉泰姆
* Over Current Protection withdvK嘉泰姆
    Hiccup-ModedvK嘉泰姆
* Input over voltage protection(OVP)dvK嘉泰姆
*  Thermal ShutdowndvK嘉泰姆
*  Inrush Current Limit and Soft StartdvK嘉泰姆
*  Available in SOT23-6 PackagedvK嘉泰姆
*  -40°C to +85°C Temperature RangedvK嘉泰姆
三,应用范围 (Applications)dvK嘉泰姆

Distributed Power SystemsdvK嘉泰姆
Digital Set Top BoxesdvK嘉泰姆
Flat Panel Television and MonitorsdvK嘉泰姆
Wireless and DSL ModemsdvK嘉泰姆
Notebook ComputerdvK嘉泰姆
四.技术规格书下载（产品PDF）dvK嘉泰姆

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！dvK嘉泰姆

 dvK嘉泰姆

五,产品封装图 (Package)dvK嘉泰姆

dvK嘉泰姆
六.电路原理图dvK嘉泰姆

dvK嘉泰姆
dvK嘉泰姆
七,功能概述dvK嘉泰姆

Internal Regulator dvK嘉泰姆
The CXSD61054 is a current mode step down DC/DC converter that provides excellentdvK嘉泰姆
transient response with no extra external compensation components. This device containsdvK嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600KdvK嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DCdvK嘉泰姆
performance.dvK嘉泰姆

Error AmplifierdvK嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) anddvK嘉泰姆
outputs a current proportional to the difference between the two. This output current is thendvK嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,dvK嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationdvK嘉泰姆
network minimizes the external component counts and simplifies the control loop design. dvK嘉泰姆
Internal Soft-StartdvK嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingdvK嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)dvK嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSdvK嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thandvK嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.dvK嘉泰姆
Over-Current-Protection and HiccupdvK嘉泰姆
The CXSD61054 has cycle-by-cycle over current limit when the inductor current peak valuedvK嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB isdvK嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV isdvK嘉泰姆
triggered, the CXSD61054 enters hiccup mode to periodically restart the part. ThisdvK嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averagedvK嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect thedvK嘉泰姆
regulator. The CXSD61054 exits the hiccup mode once the over current condition isdvK嘉泰姆
removed. dvK嘉泰姆
Startup and Shutdown dvK嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. ThedvK嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then thedvK嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingdvK嘉泰姆
八,相关芯片选择指南               更多同类产品......dvK嘉泰姆

共有条评论 用户名: 密码: 验证码: 匿名发表