• [ 产品资料下载 ]

样品申请

目录kXW嘉泰姆

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

 kXW嘉泰姆

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

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencykXW嘉泰姆
over a wide output current load range.This device offers two operation modes,PWM control and PFM Mode switching control, which allows a highkXW嘉泰姆
efficiency over the wider range of the load.The  rber of readily available standard external components and is available in an 6-pin SOT23 ROHS compliant package.kXW嘉泰姆

二.产品特点(Features)kXW嘉泰姆

* High Efficiency: Up to 95%kXW嘉泰姆
* 600KHz Frequency OperationkXW嘉泰姆
* 2.0A Output CurrentkXW嘉泰姆
* No Schottky Diode RequiredkXW嘉泰姆
* 3.5V to 18V Input Voltage RangekXW嘉泰姆
* 0.6V ReferencekXW嘉泰姆
 Slope Compensated Current ModekXW嘉泰姆
 Control for Excellent Line and LoadkXW嘉泰姆
 Transient ResponsekXW嘉泰姆
* Integrated internal compensationkXW嘉泰姆
* Stable with Low ESR Ceramic OutputkXW嘉泰姆
   CapacitorskXW嘉泰姆
* Over Current Protection withkXW嘉泰姆
    Hiccup-ModekXW嘉泰姆
* Input over voltage protection(OVP)kXW嘉泰姆
*  Thermal ShutdownkXW嘉泰姆
*  Inrush Current Limit and Soft StartkXW嘉泰姆
*  Available in SOT23-6 PackagekXW嘉泰姆
*  -40°C to +85°C Temperature RangekXW嘉泰姆
三,应用范围 (Applications)kXW嘉泰姆

Distributed Power SystemskXW嘉泰姆
Digital Set Top BoxeskXW嘉泰姆
Flat Panel Television and MonitorskXW嘉泰姆
Wireless and DSL ModemskXW嘉泰姆
Notebook ComputerkXW嘉泰姆
四.技术规格书下载（产品PDF）kXW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！kXW嘉泰姆

 kXW嘉泰姆

五,产品封装图 (Package)kXW嘉泰姆

kXW嘉泰姆
六.电路原理图kXW嘉泰姆
kXW嘉泰姆
七,功能概述kXW嘉泰姆

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

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

◀ 上一篇:CXSD61053 wide input range high efficiency DC step down switching regulator 4A output current Current mode PWM control

返回顶部

下一篇▶: CXSD61055 4.5V to 16V Input Voltage Range Integrated internal compensation 2A Output Current Over Current Protection with Hiccup-Mode

共有条评论 用户名: 密码: 验证码: 匿名发表