目录Axg嘉泰姆

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

 Axg嘉泰姆

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

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

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

二.产品特点(Features)Axg嘉泰姆

* High Efficiency: Up to 95%Axg嘉泰姆
* 600KHz Frequency OperationAxg嘉泰姆
* 2.0A Output CurrentAxg嘉泰姆
* No Schottky Diode RequiredAxg嘉泰姆
* 3.5V to 18V Input Voltage RangeAxg嘉泰姆
* 0.6V ReferenceAxg嘉泰姆
 Slope Compensated Current ModeAxg嘉泰姆
 Control for Excellent Line and LoadAxg嘉泰姆
 Transient ResponseAxg嘉泰姆
* Integrated internal compensationAxg嘉泰姆
* Stable with Low ESR Ceramic OutputAxg嘉泰姆
   CapacitorsAxg嘉泰姆
* Over Current Protection withAxg嘉泰姆
    Hiccup-ModeAxg嘉泰姆
* Input over voltage protection(OVP)Axg嘉泰姆
*  Thermal ShutdownAxg嘉泰姆
*  Inrush Current Limit and Soft StartAxg嘉泰姆
*  Available in SOT23-6 PackageAxg嘉泰姆
*  -40°C to +85°C Temperature RangeAxg嘉泰姆
三,应用范围 (Applications)Axg嘉泰姆

Distributed Power SystemsAxg嘉泰姆
Digital Set Top BoxesAxg嘉泰姆
Flat Panel Television and MonitorsAxg嘉泰姆
Wireless and DSL ModemsAxg嘉泰姆
Notebook ComputerAxg嘉泰姆
四.技术规格书下载（产品PDF）Axg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！Axg嘉泰姆

 Axg嘉泰姆

五,产品封装图 (Package)Axg嘉泰姆

Axg嘉泰姆
六.电路原理图Axg嘉泰姆

Axg嘉泰姆
Axg嘉泰姆
七,功能概述Axg嘉泰姆

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

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

共有条评论 用户名: 密码: 验证码: 匿名发表