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目录Yoo嘉泰姆

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

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一,产品概述(General Description)   Yoo嘉泰姆

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

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

二.产品特点(Features)Yoo嘉泰姆

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

Up to 93% EfficiencyYoo嘉泰姆

Programmable Switching Frequency up to 500KHzYoo嘉泰姆

No Loop Compensation RequiredYoo嘉泰姆

CC/CV controlYoo嘉泰姆

Programmable CC CurrentYoo嘉泰姆

Thermal ShutdownYoo嘉泰姆

Available in SOP8-PP PackageYoo嘉泰姆

三,应用范围 (Applications) Yoo嘉泰姆

Car Charger / AdaptorYoo嘉泰姆

LED DriverYoo嘉泰姆

Pre-Regulator for Linear RegulatorsYoo嘉泰姆

Distributed Power SystemsYoo嘉泰姆

Battery ChargerCar Charger / AdaptorYoo嘉泰姆

LED DriverYoo嘉泰姆

Pre-Regulator for Linear RegulatorsYoo嘉泰姆

Distributed Power SystemsYoo嘉泰姆

Battery ChargerYoo嘉泰姆

四,产品封装图 (Package)Yoo嘉泰姆
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五,电路原理图Yoo嘉泰姆

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六, 产品PCBYoo嘉泰姆
(略)Yoo嘉泰姆
七.产品BOM  Yoo嘉泰姆
  (略)Yoo嘉泰姆
八.产品PDF文档 Yoo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！Yoo嘉泰姆

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九,功能概述Yoo嘉泰姆

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

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