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目录DHe嘉泰姆

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

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一,产品概述(General Description)   DHe嘉泰姆

        The CXSD61051 is a synchronous step down regulator with CC control from a high voltage input supply. Operating with an input voltageDHe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 architectureDHe嘉泰姆
provides for highly efficient designs. Current  mode operation provides fast transient response and eases loop stabilization.DHe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.DHe嘉泰姆

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

二.产品特点(Features)DHe嘉泰姆

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

Up to 93% EfficiencyDHe嘉泰姆

Programmable Switching Frequency up to 500KHzDHe嘉泰姆

No Loop Compensation RequiredDHe嘉泰姆

CC/CV controlDHe嘉泰姆

Programmable CC CurrentDHe嘉泰姆

Thermal ShutdownDHe嘉泰姆

Available in SOP8-PP PackageDHe嘉泰姆

三,应用范围 (Applications) DHe嘉泰姆

Car Charger / AdaptorDHe嘉泰姆

LED DriverDHe嘉泰姆

Pre-Regulator for Linear RegulatorsDHe嘉泰姆

Distributed Power SystemsDHe嘉泰姆

Battery ChargerCar Charger / AdaptorDHe嘉泰姆

LED DriverDHe嘉泰姆

Pre-Regulator for Linear RegulatorsDHe嘉泰姆

Distributed Power SystemsDHe嘉泰姆

Battery ChargerDHe嘉泰姆

四,产品封装图 (Package)DHe嘉泰姆
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五,电路原理图DHe嘉泰姆

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六, 产品PCBDHe嘉泰姆
(略)DHe嘉泰姆
七.产品BOM  DHe嘉泰姆
  (略)DHe嘉泰姆
八.产品PDF文档 DHe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！DHe嘉泰姆

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九,功能概述DHe嘉泰姆

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

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