• [ 产品资料下载 ]

样品申请

目录Em0嘉泰姆

1.产品概述                       2.产品特点Em0嘉泰姆
3.应用范围                       4.产品封装图Em0嘉泰姆
5.电路原理图                   6.产品PCB                   Em0嘉泰姆
7.产品BOM                      8.产品PDF文档 Em0嘉泰姆
9.功能概述                      10.相关产品Em0嘉泰姆

 Em0嘉泰姆

一,产品概述(General Description)   Em0嘉泰姆

        The CXSD61051 is a synchronous step down regulator with CC control from a high voltage input supply. Operating with an input voltageEm0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 architectureEm0嘉泰姆
provides for highly efficient designs. Current  mode operation provides fast transient response and eases loop stabilization.Em0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.Em0嘉泰姆

        The CXSD61051 converters are available in the industry standard SOP8-PP packages       Em0嘉泰姆

二.产品特点(Features)Em0嘉泰姆

Wide Input Voltage Range: 8V ～ 30VEm0嘉泰姆

Up to 93% EfficiencyEm0嘉泰姆

Programmable Switching Frequency up to 500KHzEm0嘉泰姆

No Loop Compensation RequiredEm0嘉泰姆

CC/CV controlEm0嘉泰姆

Programmable CC CurrentEm0嘉泰姆

Thermal ShutdownEm0嘉泰姆

Available in SOP8-PP PackageEm0嘉泰姆

三,应用范围 (Applications) Em0嘉泰姆

Car Charger / AdaptorEm0嘉泰姆

LED DriverEm0嘉泰姆

Pre-Regulator for Linear RegulatorsEm0嘉泰姆

Distributed Power SystemsEm0嘉泰姆

Battery ChargerCar Charger / AdaptorEm0嘉泰姆

LED DriverEm0嘉泰姆

Pre-Regulator for Linear RegulatorsEm0嘉泰姆

Distributed Power SystemsEm0嘉泰姆

Battery ChargerEm0嘉泰姆

四,产品封装图 (Package)Em0嘉泰姆
Em0嘉泰姆

五,电路原理图Em0嘉泰姆

Em0嘉泰姆

六, 产品PCBEm0嘉泰姆
(略)Em0嘉泰姆
七.产品BOM  Em0嘉泰姆
  (略)Em0嘉泰姆
八.产品PDF文档 Em0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！Em0嘉泰姆

 Em0嘉泰姆

九,功能概述Em0嘉泰姆

Application Information Em0嘉泰姆
The CXSD61051 operates by a constant frequency, current mode architecture. The output voltage is setEm0嘉泰姆
by an external divider returned to the FB pin. An error amplifier compares the divided output voltage withEm0嘉泰姆
a reference voltage of 1.21V and adjusts the peak inductor current accordingly. Em0嘉泰姆
Thermal ProtectionEm0嘉泰姆
The total power dissipation in CXSD61051 is limited by a thermal protection circuit. When the deviceEm0嘉泰姆
temperature rises to approximately +160°C, this circuit turns off the output, allowing the IC to cool. TheEm0嘉泰姆
thermal protection circuit can protect the device from being damaged by overheating in the event of faultEm0嘉泰姆
conditions. Continuously running the CXSD61051 into thermal shutdown degrades device reliability. Em0嘉泰姆
Current LimitEm0嘉泰姆
Current limit detection occurs during the off-time by monitoring the current through the low-side switchEm0嘉泰姆
using an external resistor, RLIM. The current limit value is defined by RLIM. If during the off-time theEm0嘉泰姆
current in the low-side switch exceeds the user defined current limit value, the next on-time cycle isEm0嘉泰姆
immediately terminated. Current sensing is achieved by comparing the voltage across the low side FETEm0嘉泰姆
with the voltage across the current limit set resistor RLIM. For example, the current limit value is 4.5A byEm0嘉泰姆
the RLIM =100K. The current limit value rises when the set resistor RLIM rises. The maximum outputEm0嘉泰姆
current is set by RLIM: RLIM (kΩ) = 1500 · IMAX (A) / RDS_PMOS (mΩ). Em0嘉泰姆
Oscillator FrequencyEm0嘉泰姆
The CXSD61051 oscillator frequency is set by a single external resistor connected between the RT pin andEm0嘉泰姆
the GND pin. The resistor should be located very close to the device and connected directly to the pinsEm0嘉泰姆
of the IC (RT and GND). An internal amplifier holds the RT pin at a fixed voltage typically 0.6V. TheEm0嘉泰姆
oscillator frequency rises when the resistor RT falls. To determine the timing resistance for a givenEm0嘉泰姆
switching frequency, use the equation below:Em0嘉泰姆
RT(kΩ)= 22000 /fOSC(kHz) Em0嘉泰姆
Setting Output VoltageEm0嘉泰姆
The output voltage is set with a resistor divider from the output node to the FB pin. It is recommended toEm0嘉泰姆
use divider resistors with 1% tolerance or better. To improve efficiency at very light loads consider usingEm0嘉泰姆
larger value resistors. If the values are too high the regulator is more susceptible to noise and voltageEm0嘉泰姆
errors from the FB input current are noticeable. For most applications, a resistor in the 10kΩ to 1MΩEm0嘉泰姆
range is suggested for R3. R2 is then given by:Em0嘉泰姆
R2 = R3 · [(VOUT / VREF) – 1]Em0嘉泰姆
where VREF is 1.21V.Em0嘉泰姆
Output Cable Resistance CompensationEm0嘉泰姆
To compensate for resistive voltage drop across the charger's output cable, the CXSD61051 integrates aEm0嘉泰姆
simple, user-programmable cable voltage drop compensation using the impedance at the FB pin.Em0嘉泰姆
Choose the proper feedback resistance values for cable compensation refer to the curve in Figure 1.Em0嘉泰姆
The delta VOUT voltage rises when the feedback resistance R3 value rises, use the equation belowEm0嘉泰姆
十,相关产品              更多同类产品......Em0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