• [ CXSD61051 ]

样品申请

目录WqD嘉泰姆

1.产品概述                       2.产品特点WqD嘉泰姆
3.应用范围                       4.产品封装图WqD嘉泰姆
5.电路原理图                   6.产品PCB                   WqD嘉泰姆
7.产品BOM                      8.产品PDF文档 WqD嘉泰姆
9.功能概述                      10.相关产品WqD嘉泰姆

 WqD嘉泰姆

一,产品概述(General Description)   WqD嘉泰姆

        The CXSD61051 is a synchronous step down regulator with CC control from a high voltage input supply. Operating with an input voltageWqD嘉泰姆
range of 8V ～ 30V, the CXSD61051 achieves 3.5A continuous output current with excellent load and line regulation. The switching  frequency is programmable from 100KHz to 500KHz and the synchronous architectureWqD嘉泰姆
provides for highly efficient designs. Current  mode operation provides fast transient response and eases loop stabilization.WqD嘉泰姆

         The CXSD61051 requires a minimum number of readily available standard external components. Other features include cable compensation programmable current limit and thermal shutdown.WqD嘉泰姆

        The CXSD61051 converters are available in the industry standard SOP8-PP packages       WqD嘉泰姆

二.产品特点(Features)WqD嘉泰姆

Wide Input Voltage Range: 8V ～ 30VWqD嘉泰姆

Up to 93% EfficiencyWqD嘉泰姆

Programmable Switching Frequency up to 500KHzWqD嘉泰姆

No Loop Compensation RequiredWqD嘉泰姆

CC/CV controlWqD嘉泰姆

Programmable CC CurrentWqD嘉泰姆

Thermal ShutdownWqD嘉泰姆

Available in SOP8-PP PackageWqD嘉泰姆

三,应用范围 (Applications) WqD嘉泰姆

Car Charger / AdaptorWqD嘉泰姆

LED DriverWqD嘉泰姆

Pre-Regulator for Linear RegulatorsWqD嘉泰姆

Distributed Power SystemsWqD嘉泰姆

Battery ChargerCar Charger / AdaptorWqD嘉泰姆

LED DriverWqD嘉泰姆

Pre-Regulator for Linear RegulatorsWqD嘉泰姆

Distributed Power SystemsWqD嘉泰姆

Battery ChargerWqD嘉泰姆

四,产品封装图 (Package)WqD嘉泰姆
WqD嘉泰姆

五,电路原理图WqD嘉泰姆

WqD嘉泰姆

六, 产品PCBWqD嘉泰姆
(略)WqD嘉泰姆
七.产品BOM  WqD嘉泰姆
  (略)WqD嘉泰姆
八.产品PDF文档 WqD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！WqD嘉泰姆

 WqD嘉泰姆

九,功能概述WqD嘉泰姆

Application Information WqD嘉泰姆
The CXSD61051 operates by a constant frequency, current mode architecture. The output voltage is setWqD嘉泰姆
by an external divider returned to the FB pin. An error amplifier compares the divided output voltage withWqD嘉泰姆
a reference voltage of 1.21V and adjusts the peak inductor current accordingly. WqD嘉泰姆
Thermal ProtectionWqD嘉泰姆
The total power dissipation in CXSD61051 is limited by a thermal protection circuit. When the deviceWqD嘉泰姆
temperature rises to approximately +160°C, this circuit turns off the output, allowing the IC to cool. TheWqD嘉泰姆
thermal protection circuit can protect the device from being damaged by overheating in the event of faultWqD嘉泰姆
conditions. Continuously running the CXSD61051 into thermal shutdown degrades device reliability. WqD嘉泰姆
Current LimitWqD嘉泰姆
Current limit detection occurs during the off-time by monitoring the current through the low-side switchWqD嘉泰姆
using an external resistor, RLIM. The current limit value is defined by RLIM. If during the off-time theWqD嘉泰姆
current in the low-side switch exceeds the user defined current limit value, the next on-time cycle isWqD嘉泰姆
immediately terminated. Current sensing is achieved by comparing the voltage across the low side FETWqD嘉泰姆
with the voltage across the current limit set resistor RLIM. For example, the current limit value is 4.5A byWqD嘉泰姆
the RLIM =100K. The current limit value rises when the set resistor RLIM rises. The maximum outputWqD嘉泰姆
current is set by RLIM: RLIM (kΩ) = 1500 · IMAX (A) / RDS_PMOS (mΩ). WqD嘉泰姆
Oscillator FrequencyWqD嘉泰姆
The CXSD61051 oscillator frequency is set by a single external resistor connected between the RT pin andWqD嘉泰姆
the GND pin. The resistor should be located very close to the device and connected directly to the pinsWqD嘉泰姆
of the IC (RT and GND). An internal amplifier holds the RT pin at a fixed voltage typically 0.6V. TheWqD嘉泰姆
oscillator frequency rises when the resistor RT falls. To determine the timing resistance for a givenWqD嘉泰姆
switching frequency, use the equation below:WqD嘉泰姆
RT(kΩ)= 22000 /fOSC(kHz) WqD嘉泰姆
Setting Output VoltageWqD嘉泰姆
The output voltage is set with a resistor divider from the output node to the FB pin. It is recommended toWqD嘉泰姆
use divider resistors with 1% tolerance or better. To improve efficiency at very light loads consider usingWqD嘉泰姆
larger value resistors. If the values are too high the regulator is more susceptible to noise and voltageWqD嘉泰姆
errors from the FB input current are noticeable. For most applications, a resistor in the 10kΩ to 1MΩWqD嘉泰姆
range is suggested for R3. R2 is then given by:WqD嘉泰姆
R2 = R3 · [(VOUT / VREF) – 1]WqD嘉泰姆
where VREF is 1.21V.WqD嘉泰姆
Output Cable Resistance CompensationWqD嘉泰姆
To compensate for resistive voltage drop across the charger's output cable, the CXSD61051 integrates aWqD嘉泰姆
simple, user-programmable cable voltage drop compensation using the impedance at the FB pin.WqD嘉泰姆
Choose the proper feedback resistance values for cable compensation refer to the curve in Figure 1.WqD嘉泰姆
The delta VOUT voltage rises when the feedback resistance R3 value rises, use the equation belowWqD嘉泰姆
十,相关产品              更多同类产品......WqD嘉泰姆

◀ 上一篇:CXSD61047B synchronous step-down DC/DC converter wide 4.5V to 23V input voltage range and 3.5A continuous load current capability.

返回顶部

下一篇▶:CXSD61052 current mode monolithic buck switching regulator Operating with an input range of 3.6-40V 2A of continuous output current

共有条评论 用户名: 密码: 验证码: 匿名发表