• [ 产品资料下载 ]

样品申请

目录Zxf嘉泰姆

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

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

    The CXSD61055 is a fully integrated, high– efficiency 2A synchronous rectified step-down converter.The CXSD61055 operates at high efficiency over a wide output current load range.Zxf嘉泰姆
This device offers two operation modes, PWM control and PFM Mode switching control, which allows a high efficiency over the wider range of the load.Zxf嘉泰姆
    The CXSD61055 requires a minimum number of readily available standard externalZxf嘉泰姆
components and is available in an 6-pin SOT23 ROHS compliant package.Zxf嘉泰姆
二.产品特点(Features)Zxf嘉泰姆

1.)High Efficiency: Up to 96%Zxf嘉泰姆
2.)600KHz Frequency OperationZxf嘉泰姆
3.)2A Output CurrentZxf嘉泰姆
4.)No Schottky Diode RequiredZxf嘉泰姆
5.)4.5V to 16V Input Voltage RangeZxf嘉泰姆
6.)0.6V ReferenceZxf嘉泰姆
7.)Slope Compensated Current Mode Control forZxf嘉泰姆
     Excellent Line and Load Transient ResponseZxf嘉泰姆
8.)Integrated internal compensationZxf嘉泰姆
9.)Stable with Low ESR Ceramic Output CapacitorsZxf嘉泰姆
10.)Over Current Protection with Hiccup-ModeZxf嘉泰姆
11.)Thermal ShutdownZxf嘉泰姆
12.)Inrush Current Limit and Soft StartZxf嘉泰姆
13.)Available in SOT23-6 PackageZxf嘉泰姆
14.)-40°C to +85°C Temperature RangeZxf嘉泰姆
三,应用范围 (Applications)Zxf嘉泰姆

Distributed Power SystemsZxf嘉泰姆
Digital Set Top BoxesZxf嘉泰姆
Flat Panel Television and MonitorsZxf嘉泰姆
Wireless and DSL ModemsZxf嘉泰姆
Notebook ComputerZxf嘉泰姆
四.下载产品资料PDF文档 Zxf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！Zxf嘉泰姆

 Zxf嘉泰姆

五,产品封装图 (Package)Zxf嘉泰姆
Zxf嘉泰姆
六.电路原理图Zxf嘉泰姆

Zxf嘉泰姆
七,功能概述Zxf嘉泰姆

Internal RegulatorZxf嘉泰姆
    The CXSD61055 is a current mode step down DC/DC converter that provides excellent transientZxf嘉泰姆
response with no extra external compensation components. This device contains an internal,Zxf嘉泰姆
low resistance, high voltage power MOSFET, and operates at a high 600K operating frequency toZxf嘉泰姆
ensure a compact, high efficiency design with excellent AC and DC performance. Zxf嘉泰姆
Error AmplifierZxf嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (V FB) and outputs aZxf嘉泰姆
current proportional to the difference between the two. This output current is then used to chargeZxf嘉泰姆
or discharge the internal compensation network to form the COMP voltage, which is used toZxf嘉泰姆
control the power MOSFET current.The optimized internal compensation network minimizes theZxf嘉泰姆
external component counts and simplifies the control loop design. Zxf嘉泰姆
Internal Soft-StartZxf嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingZxf嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)Zxf嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SS overridesZxf嘉泰姆
REF so the error amplifier uses SS as the reference. When SS is higher than REF, REFZxf嘉泰姆
regains control. The SS time is internally fixed to 1 ms. Over-Current-Protection and HiccupZxf嘉泰姆
The CXSD61055 has cycle-by-cycle over current limit when the inductor current peak valueZxf嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FBZxf嘉泰姆
is below the Under-Voltage (UV) threshold,typically 30% below the reference. Once a UV isZxf嘉泰姆
triggered, the CXSD61055 enters hiccup mode to periodically restart the part. This protection modeZxf嘉泰姆
is especially useful when the output is dead-short to ground. The average short circuitZxf嘉泰姆
current is greatly reduced to alleviate the thermal issue and to protect the regulator. The CXSD61055Zxf嘉泰姆
exits the hiccup mode once the over current condition is removed. Zxf嘉泰姆
Startup and ShutdownZxf嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. TheZxf嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then theZxf嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingZxf嘉泰姆
circuitries. Three events can shut down the chip: EN low, VIN low and thermal shutdown. In theZxf嘉泰姆
shutdown procedure, the signaling path is first blocked to avoid any fault triggering. The COMPZxf嘉泰姆
voltage and the internal supply rail are then pulled down. The floating driver is not subject toZxf嘉泰姆
this shutdown command.Zxf嘉泰姆
八,相关产品                     更多同类产品......Zxf嘉泰姆

◀ 上一篇:CXSD61054 fully in tegrated , high-efficiency 2.0A synchronous rectified step-down converter high efficiency over a wide output current load range

返回顶部

下一篇▶:CXSD61055A step-down DC/DC converter wide 4.5V to 21V input voltage range 2A continuous load current capability

共有条评论 用户名: 密码: 验证码: 匿名发表