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

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发表时间：2020-04-28浏览次数：134

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

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

一,产品概述(General Description) Dmp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.Dmp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.Dmp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.Dmp嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.Dmp嘉泰姆
二.产品特点(Features)Dmp嘉泰姆
Wide Input Voltage from 4.5V to 24VDmp嘉泰姆
3A Continuous Output CurrentDmp嘉泰姆
Adjustable Output Voltage from 0.925V to 20VDmp嘉泰姆
Intergrated High/Low Side MOSFETDmp嘉泰姆
PFM/PWM mode OperationDmp嘉泰姆
Fixed 340kHz Switching FrequencyDmp嘉泰姆
Stable with Low ESR Ceramic Output CapacitorsDmp嘉泰姆
Power-On-Reset DetectionDmp嘉泰姆
Programmable Soft-StartDmp嘉泰姆
Over-Temperature ProtectionDmp嘉泰姆
Current-Limit Protection with Frequency FoldbackDmp嘉泰姆
Enable/Shutdown FunctionDmp嘉泰姆
Small SOP-8P PackageDmp嘉泰姆
Lead Free and Green Devices AvailableDmp嘉泰姆
(RoHS CompliantDmp嘉泰姆
三,应用范围 (Applications)Dmp嘉泰姆

LCD Monitor/TVDmp嘉泰姆

Set-Top BoxDmp嘉泰姆
DSL, Switch HUBDmp嘉泰姆
Notebook ComputerDmp嘉泰姆

四.下载产品资料PDF文档 Dmp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！Dmp嘉泰姆

QQ截图20160419174301.jpg Dmp嘉泰姆

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五,产品封装图 (Package)Dmp嘉泰姆

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六.电路原理图Dmp嘉泰姆

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七,功能概述Dmp嘉泰姆

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

Switching Regulator > Buck ConverterDmp嘉泰姆
Part_No Dmp嘉泰姆	PackageDmp嘉泰姆	ArchitectuDmp嘉泰姆	No.ofDmp嘉泰姆 PWM Dmp嘉泰姆 OutpuDmp嘉泰姆	DriveDmp嘉泰姆 LoutDmp嘉泰姆 (A) Dmp嘉泰姆	Vin(V) Dmp嘉泰姆		FmaxDmp嘉泰姆 Khz Dmp嘉泰姆	Vref Dmp嘉泰姆 (V) Dmp嘉泰姆	R-Top (milohm) Dmp嘉泰姆	R-Sync (milohm) Dmp嘉泰姆	Iq (No load) (uA) Dmp嘉泰姆
Part_No Dmp嘉泰姆	PackageDmp嘉泰姆	ArchitectuDmp嘉泰姆	No.ofDmp嘉泰姆 PWM Dmp嘉泰姆 OutpuDmp嘉泰姆	DriveDmp嘉泰姆 LoutDmp嘉泰姆 (A) Dmp嘉泰姆	minDmp嘉泰姆	maxDmp嘉泰姆	FmaxDmp嘉泰姆 Khz Dmp嘉泰姆	Vref Dmp嘉泰姆 (V) Dmp嘉泰姆	R-Top (milohm) Dmp嘉泰姆	R-Sync (milohm) Dmp嘉泰姆	Iq (No load) (uA) Dmp嘉泰姆
CXSD62122Dmp嘉泰姆	TQFN5x6-28Dmp嘉泰姆	CMDmp嘉泰姆	1Dmp嘉泰姆	5Dmp嘉泰姆	4.5Dmp嘉泰姆	26Dmp嘉泰姆	380Dmp嘉泰姆	0.8Dmp嘉泰姆	50Dmp嘉泰姆	20Dmp嘉泰姆	1000Dmp嘉泰姆
CXSD62123Dmp嘉泰姆	SOP-8Dmp嘉泰姆	CMDmp嘉泰姆	1Dmp嘉泰姆	2Dmp嘉泰姆	4.5Dmp嘉泰姆	26Dmp嘉泰姆	380Dmp嘉泰姆	0.8Dmp嘉泰姆	100Dmp嘉泰姆		1000Dmp嘉泰姆
CXSD62124Dmp嘉泰姆	SOP-8PDmp嘉泰姆	CMDmp嘉泰姆	1Dmp嘉泰姆	4Dmp嘉泰姆	4.5Dmp嘉泰姆	26Dmp嘉泰姆	380Dmp嘉泰姆	0.8Dmp嘉泰姆	80Dmp嘉泰姆		1000Dmp嘉泰姆
CXSD62125Dmp嘉泰姆	SOT23-5\|TSOT23-5Dmp嘉泰姆	CMDmp嘉泰姆	1Dmp嘉泰姆	1Dmp嘉泰姆	2.7Dmp嘉泰姆	6Dmp嘉泰姆	1500Dmp嘉泰姆	0.6Dmp嘉泰姆	280Dmp嘉泰姆	250Dmp嘉泰姆	25Dmp嘉泰姆
CXSD62125ADmp嘉泰姆	SOT23-5Dmp嘉泰姆	CMDmp嘉泰姆	1Dmp嘉泰姆	1Dmp嘉泰姆	2.7Dmp嘉泰姆	6Dmp嘉泰姆	1500Dmp嘉泰姆	0.6Dmp嘉泰姆	280Dmp嘉泰姆	250Dmp嘉泰姆
CXSD62126Dmp嘉泰姆	SOP-8Dmp嘉泰姆	CMDmp嘉泰姆	1Dmp嘉泰姆	3Dmp嘉泰姆	4.3Dmp嘉泰姆	14Dmp嘉泰姆	500Dmp嘉泰姆	0.8Dmp嘉泰姆	70Dmp嘉泰姆	70Dmp嘉泰姆	500Dmp嘉泰姆
CXSD62127Dmp嘉泰姆	SOP-8PDmp嘉泰姆	CMDmp嘉泰姆	1Dmp嘉泰姆	3Dmp嘉泰姆	4.3Dmp嘉泰姆	14Dmp嘉泰姆	500Dmp嘉泰姆	0.8Dmp嘉泰姆	55Dmp嘉泰姆	45Dmp嘉泰姆	500Dmp嘉泰姆
CXSD62128BDmp嘉泰姆	TDFN3x3-10Dmp嘉泰姆			3Dmp嘉泰姆	2.6Dmp嘉泰姆	5.5Dmp嘉泰姆	2000Dmp嘉泰姆	0.8Dmp嘉泰姆	110Dmp嘉泰姆	110Dmp嘉泰姆	460Dmp嘉泰姆
CXSD62129Dmp嘉泰姆	TDFN3x3-10Dmp嘉泰姆	CMDmp嘉泰姆	2Dmp嘉泰姆	1Dmp嘉泰姆	2.7Dmp嘉泰姆	6Dmp嘉泰姆	1500Dmp嘉泰姆	0.6Dmp嘉泰姆	280Dmp嘉泰姆	250Dmp嘉泰姆	500Dmp嘉泰姆
CXSD62129ADmp嘉泰姆	TDFN3x3-10Dmp嘉泰姆	CMDmp嘉泰姆	2Dmp嘉泰姆	1Dmp嘉泰姆	2.7Dmp嘉泰姆	6Dmp嘉泰姆	1500Dmp嘉泰姆	0.6Dmp嘉泰姆	280Dmp嘉泰姆	250Dmp嘉泰姆
CXSD62130Dmp嘉泰姆	TDFN2x2-6Dmp嘉泰姆	CMDmp嘉泰姆	1Dmp嘉泰姆	1Dmp嘉泰姆	2.7Dmp嘉泰姆	6Dmp嘉泰姆	1500Dmp嘉泰姆	0.6Dmp嘉泰姆	280Dmp嘉泰姆	250Dmp嘉泰姆	25Dmp嘉泰姆
CXSD62130ADmp嘉泰姆	TDFN2x2-6Dmp嘉泰姆	CMDmp嘉泰姆	1Dmp嘉泰姆	1Dmp嘉泰姆	2.7Dmp嘉泰姆	6Dmp嘉泰姆	1500Dmp嘉泰姆	0.6Dmp嘉泰姆	280Dmp嘉泰姆	250Dmp嘉泰姆
CXSD62131Dmp嘉泰姆	TDFN3x3-12Dmp嘉泰姆	CMDmp嘉泰姆	2Dmp嘉泰姆	1Dmp嘉泰姆	2.7Dmp嘉泰姆	6Dmp嘉泰姆	1500Dmp嘉泰姆	0.6Dmp嘉泰姆	280Dmp嘉泰姆	250Dmp嘉泰姆	25Dmp嘉泰姆
CXSD62131ADmp嘉泰姆	TDFN3x3-12Dmp嘉泰姆	CMDmp嘉泰姆	2Dmp嘉泰姆	1Dmp嘉泰姆	2.7Dmp嘉泰姆	6Dmp嘉泰姆	1500Dmp嘉泰姆	0.6Dmp嘉泰姆	280Dmp嘉泰姆	250Dmp嘉泰姆
CXSD62131CDmp嘉泰姆	TDFN 3x3 12Dmp嘉泰姆	CMDmp嘉泰姆	2Dmp嘉泰姆	1Dmp嘉泰姆	3Dmp嘉泰姆	5.5Dmp嘉泰姆	1500Dmp嘉泰姆	0.6Dmp嘉泰姆	280Dmp嘉泰姆	250Dmp嘉泰姆	30Dmp嘉泰姆
CXSD62132Dmp嘉泰姆	TQFN3x3-20Dmp嘉泰姆	CMDmp嘉泰姆	3Dmp嘉泰姆	2Dmp嘉泰姆	2.9Dmp嘉泰姆	5.5Dmp嘉泰姆	1500Dmp嘉泰姆	0.6Dmp嘉泰姆	-Dmp嘉泰姆	-Dmp嘉泰姆	300Dmp嘉泰姆
CXSD62133Dmp嘉泰姆	TDFN2x2-8Dmp嘉泰姆	CMDmp嘉泰姆	1Dmp嘉泰姆	1Dmp嘉泰姆	3.3Dmp嘉泰姆	8Dmp嘉泰姆	1500Dmp嘉泰姆	0.6Dmp嘉泰姆	280Dmp嘉泰姆	250Dmp嘉泰姆	25Dmp嘉泰姆
CXSD62134Dmp嘉泰姆	SOP-8Dmp嘉泰姆	CMDmp嘉泰姆	1Dmp嘉泰姆	2Dmp嘉泰姆	4.5Dmp嘉泰姆	24Dmp嘉泰姆	340Dmp嘉泰姆	0.925Dmp嘉泰姆	110Dmp嘉泰姆	110Dmp嘉泰姆	1900Dmp嘉泰姆
CXSD62135Dmp嘉泰姆	SOP-8PDmp嘉泰姆	CMDmp嘉泰姆	1Dmp嘉泰姆	3Dmp嘉泰姆	4.5Dmp嘉泰姆	24Dmp嘉泰姆	340Dmp嘉泰姆	0.925Dmp嘉泰姆	110Dmp嘉泰姆	110Dmp嘉泰姆	1900Dmp嘉泰姆

上一篇：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

下一篇：CXSD62147 PFM/PWM模式操作固定340kHz开关频率低ESR陶瓷输出电容稳定

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