CXMD3256

CXMD3256是一种电压模式,固定200kHz/300kHz/600kHz开关频率,同步降压转换器。CXSD6296允许宽输入电压,可以是单个5~12伏或两个电源电压,适用于各种应用。上电复位(POR)电路监测VCC电源电压,以防止错误的逻辑控制。在软启动电路中,它既能防止输出电压过冲,又能限制输入电流。为满足低输出电压应用的要求,设计了一种高精度的0.6V/0.8V温度补偿参考电压。CXSD6296针对负载电流变化提供了卓越的输出电压调节。控制器的过电流保护通过使用低边MOSFET的RDS(ON)上的电压降来监测输出电流,从而消除了对电流传感电阻的需求,该电阻具有高效率和低成本的特点。此外,CXMD3256还集成了excel-lent保护功能。过电压保护(OVP)、欠电压保护(UVP)。监视FB电压以防止PWM输出过电压的OVP电路和监视FB电压以防止PWM输出过电压或短路的UVP电路。CXMD3256在SOP-8P中提供

宽5V至12V电源电压
VCC上电复位监控
良好的输出电压调节
CXMD3256/A/D的0.6V内部参考电压
CXMD3256B/C的0.8V内部参考电压
超过温度范围±0.6%
集成软启动
带外部补偿的电压模式PWM操作
高达90%DutyRatio,快速瞬态响应
恒定开关频率
CXMD3256/B为300kHz±10%
CXMD3256C为200kHz±10%
CXMD3256A/D为600kHz±10%
集成自举正激P-CH MOSFET
50%欠压保护
125%过电压保护
可调过流保护阈值
使用低边MOSFET的RDS(ON)
关闭控制byCOMP
SOP-8P包
提供无铅和绿色设备

CXMD3256电压模式固定200kHz 300kHz 600kHz开关频率同步降压转换器单个5~12伏或两个电源电压上电复位POR电路监测VCC电源电压防止错误的逻辑控制带外部补偿的电压模式PWM操作

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目录

1.产品概述       2.产品特点     oqq嘉泰姆

3.应用范围       4.技术规格书下载(PDF文档)oqq嘉泰姆

5.产品封装       6.电路原理图  oqq嘉泰姆

7.相关产品oqq嘉泰姆

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产品概述 返回TOPoqq嘉泰姆


The CXMD3256 is a voltage mode, fixed 200kHz/300kHz/600kHz switching frequency,synchronous buck converter. The CXSD6296 allows wide input voltage that is either a single 5~1 2V or two supply voltage(s) for various applications. A power-on-reset (POR) circuit monitors the VCC supply voltage to prevent wrong logic controls. Abuilt- in soft-start circuit prevents the output voltages from over- shoot as well as limits the input current. An internal 0.6V/0.8V Temperature-compensated reference voltage with high accuracy is designed to meet the requirement of low out- put voltage applications. The CXSD6296 provides excel- lent output voltage regulations against load current variation. The controller’s over-current protection monitors the out- put current by using the voltage drop across the RDS (ON) of low-side MOSFET, eliminating the need for a cur- rent sensing resistor that features high efficiency and low cost. In addition, the CXMD3256 also integrates excel- lent protection functions. The over-voltage protection (OVP), under-voltage protection (UVP). OVP circuit which monitors the FB voltage to prevent the PWM output from over voltage, and UVP circuit which monitors the FB voltage to prevent the PWM output from under voltage or short circuit.The CXMD3256 is available in SOP-8P packages

   产品特点 返回TOPoqq嘉泰姆


Wide 5V to 12V Supply Voltageoqq嘉泰姆

Power-On-Reset Monitoring on VCCoqq嘉泰姆

Excellent Output Voltage Regulationsoqq嘉泰姆

0.6V Internal Reference for CXMD3256/A/Doqq嘉泰姆

0.8V Internal Reference for CXMD3256B/Coqq嘉泰姆

±0.6% Over-Temperature Rangeoqq嘉泰姆

Integrated Soft-Startoqq嘉泰姆

Voltage Mode PWM Operation with External Compensationoqq嘉泰姆

Up to 90%DutyRatio for Fast Transient Responseoqq嘉泰姆

Constant Switching Frequencyoqq嘉泰姆

300kHz ±10% for CXMD3256/Boqq嘉泰姆

200kHz ±10% for CXMD3256Coqq嘉泰姆

600kHz ±10% for CXMD3256A/Doqq嘉泰姆

Integrated Bootstrap Forward P-CH MOSFEToqq嘉泰姆

50%Under-Voltage Protectionoqq嘉泰姆

125%Over-Voltage Protectionoqq嘉泰姆

Adjustable Over-Current Protection Thresholdoqq嘉泰姆

Using the RDS(ON) of Low-Side MOSFEToqq嘉泰姆

Shutdown Control byCOMPoqq嘉泰姆

SOP-8P Packageoqq嘉泰姆

Lead Free and Green Devices Availableoqq嘉泰姆

   应用范围 返回TOPoqq嘉泰姆


Graphic Cardsoqq嘉泰姆

DSL, Switch HUBoqq嘉泰姆

Wireless Lanoqq嘉泰姆

Notebook Computeroqq嘉泰姆

Mother Boardoqq嘉泰姆

    LCD Monitor/TVoqq嘉泰姆

   技术规格书(产品PDF) 返回TOP oqq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!oqq嘉泰姆

 QQ截图20160419174301.jpgoqq嘉泰姆

产品封装图 返回TOPoqq嘉泰姆


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电路原理图 返回TOPoqq嘉泰姆


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PWM Controller(脉宽调制控制器)oqq嘉泰姆

Part No.oqq嘉泰姆

Input Voltageoqq嘉泰姆

Output oqq嘉泰姆

Voltageoqq嘉泰姆

Frequencyoqq嘉泰姆

Efficiencyoqq嘉泰姆

Packageoqq嘉泰姆

precisionoqq嘉泰姆

Overoqq嘉泰姆

Overoqq嘉泰姆

Short oqq嘉泰姆

Protectionoqq嘉泰姆

Currentoqq嘉泰姆

Temperatureoqq嘉泰姆

Protectionoqq嘉泰姆

Protectionoqq嘉泰姆

CXMD3255oqq嘉泰姆

16Voqq嘉泰姆

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300KHZoqq嘉泰姆

93%oqq嘉泰姆

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◀ 上一篇:CXMD3255电压模式固定300kHz开关频率同步降压转换器宽输入电压5~12V上电复位POR电路监测VCC电源电压防止错误的逻辑控制外部补偿的l电压模式PWM控制

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下一篇▶:CXMD3257单相恒定时间同步的脉宽调制控制器驱动N通道mosfet逐步降低高压在笔记本电脑中生成低压芯片组或RAM电源功率因数调制或脉宽调制模式下提供出色的瞬态响应和精确的直流电压输出