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CXSD61051 synchronous step down regulator CC control from a high voltage input supply 3.5A continuou
发表时间:2020-04-09浏览次数:116
CXSD61051 synchronous step down regulator CC control from a high voltage input supply 3.5A continuou
 

目录Icj嘉泰姆

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

 Icj嘉泰姆

一,产品概述(General Description)   Icj嘉泰姆

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

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

二.产品特点(Features)Icj嘉泰姆

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

Up to 93% EfficiencyIcj嘉泰姆

Programmable Switching Frequency up to 500KHzIcj嘉泰姆

No Loop Compensation RequiredIcj嘉泰姆

CC/CV controlIcj嘉泰姆

Programmable CC CurrentIcj嘉泰姆

Thermal ShutdownIcj嘉泰姆

Available in SOP8-PP PackageIcj嘉泰姆

三,应用范围 (Applications) Icj嘉泰姆

Car Charger / AdaptorIcj嘉泰姆

LED DriverIcj嘉泰姆

Pre-Regulator for Linear RegulatorsIcj嘉泰姆

Distributed Power SystemsIcj嘉泰姆

Battery ChargerCar Charger / AdaptorIcj嘉泰姆

LED DriverIcj嘉泰姆

Pre-Regulator for Linear RegulatorsIcj嘉泰姆

Distributed Power SystemsIcj嘉泰姆

Battery ChargerIcj嘉泰姆

四,产品封装图 (Package)Icj嘉泰姆
Icj嘉泰姆

PINIcj嘉泰姆

NAMEIcj嘉泰姆

DESCRIPTIONIcj嘉泰姆

1Icj嘉泰姆

FBIcj嘉泰姆

FeedbackIcj嘉泰姆

2Icj嘉泰姆

ILIMIcj嘉泰姆

CC Current SettngIcj嘉泰姆

3Icj嘉泰姆

ENIcj嘉泰姆

EnableIcj嘉泰姆

4Icj嘉泰姆

PDRIIcj嘉泰姆

PMOS Gate DriveIcj嘉泰姆

5Icj嘉泰姆

NDRIIcj嘉泰姆

NMOS Gate DriveIcj嘉泰姆

6Icj嘉泰姆

VINIcj嘉泰姆

Input Supply VoltageIcj嘉泰姆

7Icj嘉泰姆

RTIcj嘉泰姆

Frequency settingIcj嘉泰姆

8Icj嘉泰姆

SWIcj嘉泰姆

Switch NodeIcj嘉泰姆

9Icj嘉泰姆

GNDIcj嘉泰姆

GroundIcj嘉泰姆

五,电路原理图Icj嘉泰姆


blob.pngIcj嘉泰姆

六, 产品PCBIcj嘉泰姆
(略)Icj嘉泰姆
七.产品BOM  Icj嘉泰姆
  (略)Icj嘉泰姆
八.产品PDF文档 Icj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Icj嘉泰姆

 QQ截图20160419174301.jpgIcj嘉泰姆

九,功能概述Icj嘉泰姆


Application Information Icj嘉泰姆
The CXSD61051 operates by a constant frequency, current mode architecture. The output voltage is setIcj嘉泰姆
by an external divider returned to the FB pin. An error amplifier compares the divided output voltage withIcj嘉泰姆
a reference voltage of 1.21V and adjusts the peak inductor current accordingly. Icj嘉泰姆
Thermal ProtectionIcj嘉泰姆
The total power dissipation in CXSD61051 is limited by a thermal protection circuit. When the deviceIcj嘉泰姆
temperature rises to approximately +160°C, this circuit turns off the output, allowing the IC to cool. TheIcj嘉泰姆
thermal protection circuit can protect the device from being damaged by overheating in the event of faultIcj嘉泰姆
conditions. Continuously running the CXSD61051 into thermal shutdown degrades device reliability. Icj嘉泰姆
Current LimitIcj嘉泰姆
Current limit detection occurs during the off-time by monitoring the current through the low-side switchIcj嘉泰姆
using an external resistor, RLIM. The current limit value is defined by RLIM. If during the off-time theIcj嘉泰姆
current in the low-side switch exceeds the user defined current limit value, the next on-time cycle isIcj嘉泰姆
immediately terminated. Current sensing is achieved by comparing the voltage across the low side FETIcj嘉泰姆
with the voltage across the current limit set resistor RLIM. For example, the current limit value is 4.5A byIcj嘉泰姆
the RLIM =100K. The current limit value rises when the set resistor RLIM rises. The maximum outputIcj嘉泰姆
current is set by RLIM: RLIM (kΩ) = 1500 · IMAX (A) / RDS_PMOS (mΩ). Icj嘉泰姆
Oscillator FrequencyIcj嘉泰姆
The CXSD61051 oscillator frequency is set by a single external resistor connected between the RT pin andIcj嘉泰姆
the GND pin. The resistor should be located very close to the device and connected directly to the pinsIcj嘉泰姆
of the IC (RT and GND). An internal amplifier holds the RT pin at a fixed voltage typically 0.6V. TheIcj嘉泰姆
oscillator frequency rises when the resistor RT falls. To determine the timing resistance for a givenIcj嘉泰姆
switching frequency, use the equation below:Icj嘉泰姆
RT(kΩ)= 22000 /fOSC(kHz) Icj嘉泰姆
Setting Output VoltageIcj嘉泰姆
The output voltage is set with a resistor divider from the output node to the FB pin. It is recommended toIcj嘉泰姆
use divider resistors with 1% tolerance or better. To improve efficiency at very light loads consider usingIcj嘉泰姆
larger value resistors. If the values are too high the regulator is more susceptible to noise and voltageIcj嘉泰姆
errors from the FB input current are noticeable. For most applications, a resistor in the 10kΩ to 1MΩIcj嘉泰姆
range is suggested for R3. R2 is then given by:Icj嘉泰姆
R2 = R3 · [(VOUT / VREF) – 1]Icj嘉泰姆
where VREF is 1.21V.Icj嘉泰姆
Output Cable Resistance CompensationIcj嘉泰姆
To compensate for resistive voltage drop across the charger's output cable, the CXSD61051 integrates aIcj嘉泰姆
simple, user-programmable cable voltage drop compensation using the impedance at the FB pin.Icj嘉泰姆
Choose the proper feedback resistance values for cable compensation refer to the curve in Figure 1.Icj嘉泰姆
The delta VOUT voltage rises when the feedback resistance R3 value rises, use the equation belowIcj嘉泰姆
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