• [ 产品资料下载 ]

样品申请

目录JYq嘉泰姆

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

一,产品概述(General Description)         JYq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.JYq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.JYq嘉泰姆
    The CXSD61055 requires a minimum number of readily available standard externalJYq嘉泰姆
components and is available in an 6-pin SOT23 ROHS compliant package.JYq嘉泰姆
二.产品特点(Features)JYq嘉泰姆

1.)High Efficiency: Up to 96%JYq嘉泰姆
2.)600KHz Frequency OperationJYq嘉泰姆
3.)2A Output CurrentJYq嘉泰姆
4.)No Schottky Diode RequiredJYq嘉泰姆
5.)4.5V to 16V Input Voltage RangeJYq嘉泰姆
6.)0.6V ReferenceJYq嘉泰姆
7.)Slope Compensated Current Mode Control forJYq嘉泰姆
     Excellent Line and Load Transient ResponseJYq嘉泰姆
8.)Integrated internal compensationJYq嘉泰姆
9.)Stable with Low ESR Ceramic Output CapacitorsJYq嘉泰姆
10.)Over Current Protection with Hiccup-ModeJYq嘉泰姆
11.)Thermal ShutdownJYq嘉泰姆
12.)Inrush Current Limit and Soft StartJYq嘉泰姆
13.)Available in SOT23-6 PackageJYq嘉泰姆
14.)-40°C to +85°C Temperature RangeJYq嘉泰姆
三,应用范围 (Applications)JYq嘉泰姆

Distributed Power SystemsJYq嘉泰姆
Digital Set Top BoxesJYq嘉泰姆
Flat Panel Television and MonitorsJYq嘉泰姆
Wireless and DSL ModemsJYq嘉泰姆
Notebook ComputerJYq嘉泰姆
四.下载产品资料PDF文档 JYq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！JYq嘉泰姆

 JYq嘉泰姆

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

JYq嘉泰姆
七,功能概述JYq嘉泰姆

Internal RegulatorJYq嘉泰姆
    The CXSD61055 is a current mode step down DC/DC converter that provides excellent transientJYq嘉泰姆
response with no extra external compensation components. This device contains an internal,JYq嘉泰姆
low resistance, high voltage power MOSFET, and operates at a high 600K operating frequency toJYq嘉泰姆
ensure a compact, high efficiency design with excellent AC and DC performance. JYq嘉泰姆
Error AmplifierJYq嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (V FB) and outputs aJYq嘉泰姆
current proportional to the difference between the two. This output current is then used to chargeJYq嘉泰姆
or discharge the internal compensation network to form the COMP voltage, which is used toJYq嘉泰姆
control the power MOSFET current.The optimized internal compensation network minimizes theJYq嘉泰姆
external component counts and simplifies the control loop design. JYq嘉泰姆
Internal Soft-StartJYq嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingJYq嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)JYq嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SS overridesJYq嘉泰姆
REF so the error amplifier uses SS as the reference. When SS is higher than REF, REFJYq嘉泰姆
regains control. The SS time is internally fixed to 1 ms. Over-Current-Protection and HiccupJYq嘉泰姆
The CXSD61055 has cycle-by-cycle over current limit when the inductor current peak valueJYq嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FBJYq嘉泰姆
is below the Under-Voltage (UV) threshold,typically 30% below the reference. Once a UV isJYq嘉泰姆
triggered, the CXSD61055 enters hiccup mode to periodically restart the part. This protection modeJYq嘉泰姆
is especially useful when the output is dead-short to ground. The average short circuitJYq嘉泰姆
current is greatly reduced to alleviate the thermal issue and to protect the regulator. The CXSD61055JYq嘉泰姆
exits the hiccup mode once the over current condition is removed. JYq嘉泰姆
Startup and ShutdownJYq嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. TheJYq嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then theJYq嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingJYq嘉泰姆
circuitries. Three events can shut down the chip: EN low, VIN low and thermal shutdown. In theJYq嘉泰姆
shutdown procedure, the signaling path is first blocked to avoid any fault triggering. The COMPJYq嘉泰姆
voltage and the internal supply rail are then pulled down. The floating driver is not subject toJYq嘉泰姆
this shutdown command.JYq嘉泰姆
八,相关产品                     更多同类产品......JYq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