3A连续输出电流CXSD62145高/低边MOSFET PFM/PWM模式操作固定340kHz开关频率低ESR陶瓷输出电容稳定

首页 > 新闻中心 > 行业新闻

发表时间：2020-04-28浏览次数：133

3A连续输出电流CXSD62145高/低边MOSFET PFM/PWM模式操作固定340kHz开关频率低ESR陶瓷输出电容稳定

1.产品概述         2.产品特点IxD嘉泰姆
3.应用范围       4.下载产品资料PDF文档 IxD嘉泰姆
5.产品封装图                     6.电路原理图             IxD嘉泰姆
7.功能概述       8.相关产品IxD嘉泰姆

一,产品概述(General Description) IxD嘉泰姆
CXSD62144 CXSD62145 CXSD62146 CXSD62147 is a 3A synchronous buck converter with integrated 110mΩ power MOSFETs. The CXSD62144 design with a current-mode control scheme, can convert wide input voltage of 4.5V to 24V to the output voltage adjustable from 0.925V to 20V to provide excellent output voltage regulation.IxD嘉泰姆
The CXSD62144 CXSD62145 CXSD62146 CXSD62147 is equipped with an automatic PFM/PWM mode operation. At light load, the IC operates in the PFM mode to reduce the switching losses. At heavy load, the IC works in PWM.IxD嘉泰姆
The CXSD62144 CXSD62145 CXSD62146 CXSD62147 is also equipped with Power-on-reset, softstart, and whole protections (over-temperature, and current-limit) into a single package.IxD嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.IxD嘉泰姆
二.产品特点(Features)IxD嘉泰姆
Wide Input Voltage from 4.5V to 24VIxD嘉泰姆
3A Continuous Output CurrentIxD嘉泰姆
Adjustable Output Voltage from 0.925V to 20VIxD嘉泰姆
Intergrated High/Low Side MOSFETIxD嘉泰姆
PFM/PWM mode OperationIxD嘉泰姆
Fixed 340kHz Switching FrequencyIxD嘉泰姆
Stable with Low ESR Ceramic Output CapacitorsIxD嘉泰姆
Power-On-Reset DetectionIxD嘉泰姆
Programmable Soft-StartIxD嘉泰姆
Over-Temperature ProtectionIxD嘉泰姆
Current-Limit Protection with Frequency FoldbackIxD嘉泰姆
Enable/Shutdown FunctionIxD嘉泰姆
Small SOP-8P PackageIxD嘉泰姆
Lead Free and Green Devices AvailableIxD嘉泰姆
(RoHS CompliantIxD嘉泰姆
三,应用范围 (Applications)IxD嘉泰姆

LCD Monitor/TVIxD嘉泰姆

Set-Top BoxIxD嘉泰姆
DSL, Switch HUBIxD嘉泰姆
Notebook ComputerIxD嘉泰姆

四.下载产品资料PDF文档 IxD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！IxD嘉泰姆

QQ截图20160419174301.jpg IxD嘉泰姆

IxD嘉泰姆

五,产品封装图 (Package)IxD嘉泰姆

IxD嘉泰姆

六.电路原理图IxD嘉泰姆

IxD嘉泰姆

七,功能概述IxD嘉泰姆

Main Control LoopIxD嘉泰姆
The CXSD62144 is a constant frequency current mode switching regulator. During normal operation, the inter-IxD嘉泰姆
nal N-channel power MOSFET is turned on each cycle when the oscillator sets an internal RS latch and wouldIxD嘉泰姆
be turned off when an internal current comparator (ICMP) resets the latch. The peak inductor current at which ICMPIxD嘉泰姆
resets the RS latch is controlled by the voltage on the COMP pin, which is the output of the error amplifierIxD嘉泰姆
(EAMP). An external resistive divider connected between VOUT and ground allows the EAMP to receive an outputIxD嘉泰姆
feedback voltage VFB at FB pin. When the load current increases, it causes a slight decrease in VFB relative toIxD嘉泰姆
the 0.925V reference, which in turn causes the COMP voltage to increase until the average inductor currentIxD嘉泰姆
matches the new load current.IxD嘉泰姆
VIN Power-On-Reset (POR) and EN Under-voltage LockoutIxD嘉泰姆
The CXSD62144 keep monitoring the voltage on VIN pin to prevent wrong logic operations which may occur whenIxD嘉泰姆
VIN voltage is not high enough for the internal control circuitry to operate. The VIN POR has a rising thresholdIxD嘉泰姆
of 4.05V (typical) with 0.3V of hysteresis.IxD嘉泰姆
An external under-voltage lockout (UVLO) is sensed atthe EN pin. The EN UVLO has a rising threshold of 2.5VIxD嘉泰姆
with 0.2V of hysteresis. The EN pin should be connected a resistor divider from VIN to EN .After the VIN and ENIxD嘉泰姆
voltages exceed their respective voltage thresholds, the IC starts a start-up process and then ramps up the outputIxD嘉泰姆
voltage to the setting of output voltage.IxD嘉泰姆
Over-Temperature Protection (OTP)IxD嘉泰姆
The over-temperature circuit limits the junction tempera-ture of the CXSD62144 When the junction temperature ex-IxD嘉泰姆
ceeds TJ =+160oC, a thermal sensor turns off the power MOSFET, allowing the device to cool down. The thermalIxD嘉泰姆
sensor allows the converter to start a start-up process and regulate the output voltage again after the junctionIxD嘉泰姆
temperature cools by 50oC.IxD嘉泰姆
The OTP designed with a 50 oC hysteresis lowers the average T J during c ontinuous thermal overload conditions,IxD嘉泰姆
increasing life time of the IC.IxD嘉泰姆
Enable/ShutdownIxD嘉泰姆
Driving EN to ground places the CXSD62144 in shutdown.When in shutdown, the internal N-Channel power MOSFET turns off, all internal circuitry shuts down and the quies-cent supply current reduces to 0.3μA.IxD嘉泰姆
Current-Limit ProtectionIxD嘉泰姆
The CXSD62144 monitors the output current, flowing through the N-Channel power MOSFET, and limits theIxD嘉泰姆
IC from damages during overload, short-circuit and over-voltage conditions.IxD嘉泰姆
Frequency FoldbackIxD嘉泰姆
The foldback frequency is controlled by the FB voltage.When the FB pin voltage is under 0.6V, the frequency ofIxD嘉泰姆
the oscillator will be reduced to 110kHz. This lower fre-quency allows the inductor current to safely discharge,IxD嘉泰姆
thereby preventing current runaway. The oscillator’s fre-quency will switch to its designed rate when the feedbackIxD嘉泰姆
voltage on FB rises above the rising frequency foldback threshold (0.6V, typical) again.IxD嘉泰姆
Over-Voltage ProtectionIxD嘉泰姆
The over-voltage function monitors the output voltage by FB pin. When the FB voltage increase over 120% of theIxD嘉泰姆
reference voltage, the over-voltage protection compara-tor will force the high-and low-side MOSFET gate driverIxD嘉泰姆
off. As soon as the output voltage is within regulation, the OVP comparator is disengaged. The chip will restore itsIxD嘉泰姆
normal operation.IxD嘉泰姆
八,相关产品 更多同类产品.......IxD嘉泰姆

Switching Regulator > Buck ConverterIxD嘉泰姆
Part_No IxD嘉泰姆	PackageIxD嘉泰姆	ArchitectuIxD嘉泰姆	No.ofIxD嘉泰姆 PWM IxD嘉泰姆 OutpuIxD嘉泰姆	DriveIxD嘉泰姆 LoutIxD嘉泰姆 (A) IxD嘉泰姆	Vin(V) IxD嘉泰姆		FmaxIxD嘉泰姆 Khz IxD嘉泰姆	Vref IxD嘉泰姆 (V) IxD嘉泰姆	R-Top (milohm) IxD嘉泰姆	R-Sync (milohm) IxD嘉泰姆	Iq (No load) (uA) IxD嘉泰姆
Part_No IxD嘉泰姆	PackageIxD嘉泰姆	ArchitectuIxD嘉泰姆	No.ofIxD嘉泰姆 PWM IxD嘉泰姆 OutpuIxD嘉泰姆	DriveIxD嘉泰姆 LoutIxD嘉泰姆 (A) IxD嘉泰姆	minIxD嘉泰姆	maxIxD嘉泰姆	FmaxIxD嘉泰姆 Khz IxD嘉泰姆	Vref IxD嘉泰姆 (V) IxD嘉泰姆	R-Top (milohm) IxD嘉泰姆	R-Sync (milohm) IxD嘉泰姆	Iq (No load) (uA) IxD嘉泰姆
CXSD62122IxD嘉泰姆	TQFN5x6-28IxD嘉泰姆	CMIxD嘉泰姆	1IxD嘉泰姆	5IxD嘉泰姆	4.5IxD嘉泰姆	26IxD嘉泰姆	380IxD嘉泰姆	0.8IxD嘉泰姆	50IxD嘉泰姆	20IxD嘉泰姆	1000IxD嘉泰姆
CXSD62123IxD嘉泰姆	SOP-8IxD嘉泰姆	CMIxD嘉泰姆	1IxD嘉泰姆	2IxD嘉泰姆	4.5IxD嘉泰姆	26IxD嘉泰姆	380IxD嘉泰姆	0.8IxD嘉泰姆	100IxD嘉泰姆		1000IxD嘉泰姆
CXSD62124IxD嘉泰姆	SOP-8PIxD嘉泰姆	CMIxD嘉泰姆	1IxD嘉泰姆	4IxD嘉泰姆	4.5IxD嘉泰姆	26IxD嘉泰姆	380IxD嘉泰姆	0.8IxD嘉泰姆	80IxD嘉泰姆		1000IxD嘉泰姆
CXSD62125IxD嘉泰姆	SOT23-5\|TSOT23-5IxD嘉泰姆	CMIxD嘉泰姆	1IxD嘉泰姆	1IxD嘉泰姆	2.7IxD嘉泰姆	6IxD嘉泰姆	1500IxD嘉泰姆	0.6IxD嘉泰姆	280IxD嘉泰姆	250IxD嘉泰姆	25IxD嘉泰姆
CXSD62125AIxD嘉泰姆	SOT23-5IxD嘉泰姆	CMIxD嘉泰姆	1IxD嘉泰姆	1IxD嘉泰姆	2.7IxD嘉泰姆	6IxD嘉泰姆	1500IxD嘉泰姆	0.6IxD嘉泰姆	280IxD嘉泰姆	250IxD嘉泰姆
CXSD62126IxD嘉泰姆	SOP-8IxD嘉泰姆	CMIxD嘉泰姆	1IxD嘉泰姆	3IxD嘉泰姆	4.3IxD嘉泰姆	14IxD嘉泰姆	500IxD嘉泰姆	0.8IxD嘉泰姆	70IxD嘉泰姆	70IxD嘉泰姆	500IxD嘉泰姆
CXSD62127IxD嘉泰姆	SOP-8PIxD嘉泰姆	CMIxD嘉泰姆	1IxD嘉泰姆	3IxD嘉泰姆	4.3IxD嘉泰姆	14IxD嘉泰姆	500IxD嘉泰姆	0.8IxD嘉泰姆	55IxD嘉泰姆	45IxD嘉泰姆	500IxD嘉泰姆
CXSD62128BIxD嘉泰姆	TDFN3x3-10IxD嘉泰姆			3IxD嘉泰姆	2.6IxD嘉泰姆	5.5IxD嘉泰姆	2000IxD嘉泰姆	0.8IxD嘉泰姆	110IxD嘉泰姆	110IxD嘉泰姆	460IxD嘉泰姆
CXSD62129IxD嘉泰姆	TDFN3x3-10IxD嘉泰姆	CMIxD嘉泰姆	2IxD嘉泰姆	1IxD嘉泰姆	2.7IxD嘉泰姆	6IxD嘉泰姆	1500IxD嘉泰姆	0.6IxD嘉泰姆	280IxD嘉泰姆	250IxD嘉泰姆	500IxD嘉泰姆
CXSD62129AIxD嘉泰姆	TDFN3x3-10IxD嘉泰姆	CMIxD嘉泰姆	2IxD嘉泰姆	1IxD嘉泰姆	2.7IxD嘉泰姆	6IxD嘉泰姆	1500IxD嘉泰姆	0.6IxD嘉泰姆	280IxD嘉泰姆	250IxD嘉泰姆
CXSD62130IxD嘉泰姆	TDFN2x2-6IxD嘉泰姆	CMIxD嘉泰姆	1IxD嘉泰姆	1IxD嘉泰姆	2.7IxD嘉泰姆	6IxD嘉泰姆	1500IxD嘉泰姆	0.6IxD嘉泰姆	280IxD嘉泰姆	250IxD嘉泰姆	25IxD嘉泰姆
CXSD62130AIxD嘉泰姆	TDFN2x2-6IxD嘉泰姆	CMIxD嘉泰姆	1IxD嘉泰姆	1IxD嘉泰姆	2.7IxD嘉泰姆	6IxD嘉泰姆	1500IxD嘉泰姆	0.6IxD嘉泰姆	280IxD嘉泰姆	250IxD嘉泰姆
CXSD62131IxD嘉泰姆	TDFN3x3-12IxD嘉泰姆	CMIxD嘉泰姆	2IxD嘉泰姆	1IxD嘉泰姆	2.7IxD嘉泰姆	6IxD嘉泰姆	1500IxD嘉泰姆	0.6IxD嘉泰姆	280IxD嘉泰姆	250IxD嘉泰姆	25IxD嘉泰姆
CXSD62131AIxD嘉泰姆	TDFN3x3-12IxD嘉泰姆	CMIxD嘉泰姆	2IxD嘉泰姆	1IxD嘉泰姆	2.7IxD嘉泰姆	6IxD嘉泰姆	1500IxD嘉泰姆	0.6IxD嘉泰姆	280IxD嘉泰姆	250IxD嘉泰姆
CXSD62131CIxD嘉泰姆	TDFN 3x3 12IxD嘉泰姆	CMIxD嘉泰姆	2IxD嘉泰姆	1IxD嘉泰姆	3IxD嘉泰姆	5.5IxD嘉泰姆	1500IxD嘉泰姆	0.6IxD嘉泰姆	280IxD嘉泰姆	250IxD嘉泰姆	30IxD嘉泰姆
CXSD62132IxD嘉泰姆	TQFN3x3-20IxD嘉泰姆	CMIxD嘉泰姆	3IxD嘉泰姆	2IxD嘉泰姆	2.9IxD嘉泰姆	5.5IxD嘉泰姆	1500IxD嘉泰姆	0.6IxD嘉泰姆	-IxD嘉泰姆	-IxD嘉泰姆	300IxD嘉泰姆
CXSD62133IxD嘉泰姆	TDFN2x2-8IxD嘉泰姆	CMIxD嘉泰姆	1IxD嘉泰姆	1IxD嘉泰姆	3.3IxD嘉泰姆	8IxD嘉泰姆	1500IxD嘉泰姆	0.6IxD嘉泰姆	280IxD嘉泰姆	250IxD嘉泰姆	25IxD嘉泰姆
CXSD62134IxD嘉泰姆	SOP-8IxD嘉泰姆	CMIxD嘉泰姆	1IxD嘉泰姆	2IxD嘉泰姆	4.5IxD嘉泰姆	24IxD嘉泰姆	340IxD嘉泰姆	0.925IxD嘉泰姆	110IxD嘉泰姆	110IxD嘉泰姆	1900IxD嘉泰姆
CXSD62135IxD嘉泰姆	SOP-8PIxD嘉泰姆	CMIxD嘉泰姆	1IxD嘉泰姆	3IxD嘉泰姆	4.5IxD嘉泰姆	24IxD嘉泰姆	340IxD嘉泰姆	0.925IxD嘉泰姆	110IxD嘉泰姆	110IxD嘉泰姆	1900IxD嘉泰姆

上一篇：110m功率mosfet 3A同步降压转换器CXSD62144电流模式控制4.5V至24V的宽输入电压转换为0.925V至20V的可调输出电压

下一篇：CXSD62146可编程软启动宽输入电压从4.5伏到24伏PFM模式下降低开关损耗上电复位

发表评论

产品中心

电源管理

LED驱动电路

音频放大IC

电机风扇驱动芯片

MCU存储ADC时钟数据线

功率器件

隔离芯片

电池充电芯片

技术支持

产品方案

质量承诺

联系我们