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

发表时间：2020-04-28浏览次数：13

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

一,产品概述(General Description) uzE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.uzE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.uzE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.uzE嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.uzE嘉泰姆
二.产品特点(Features)uzE嘉泰姆
Wide Input Voltage from 4.5V to 24VuzE嘉泰姆
3A Continuous Output CurrentuzE嘉泰姆
Adjustable Output Voltage from 0.925V to 20VuzE嘉泰姆
Intergrated High/Low Side MOSFETuzE嘉泰姆
PFM/PWM mode OperationuzE嘉泰姆
Fixed 340kHz Switching FrequencyuzE嘉泰姆
Stable with Low ESR Ceramic Output CapacitorsuzE嘉泰姆
Power-On-Reset DetectionuzE嘉泰姆
Programmable Soft-StartuzE嘉泰姆
Over-Temperature ProtectionuzE嘉泰姆
Current-Limit Protection with Frequency FoldbackuzE嘉泰姆
Enable/Shutdown FunctionuzE嘉泰姆
Small SOP-8P PackageuzE嘉泰姆
Lead Free and Green Devices AvailableuzE嘉泰姆
(RoHS CompliantuzE嘉泰姆
三,应用范围 (Applications)uzE嘉泰姆

LCD Monitor/TVuzE嘉泰姆

Set-Top BoxuzE嘉泰姆
DSL, Switch HUBuzE嘉泰姆
Notebook ComputeruzE嘉泰姆

四.下载产品资料PDF文档 uzE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！uzE嘉泰姆

QQ截图20160419174301.jpg uzE嘉泰姆

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五,产品封装图 (Package)uzE嘉泰姆

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六.电路原理图uzE嘉泰姆

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七,功能概述uzE嘉泰姆

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

Switching Regulator > Buck ConverteruzE嘉泰姆
Part_No uzE嘉泰姆	PackageuzE嘉泰姆	ArchitectuuzE嘉泰姆	No.ofuzE嘉泰姆 PWM uzE嘉泰姆 OutpuuzE嘉泰姆	DriveuzE嘉泰姆 LoutuzE嘉泰姆 (A) uzE嘉泰姆	Vin(V) uzE嘉泰姆		FmaxuzE嘉泰姆 Khz uzE嘉泰姆	Vref uzE嘉泰姆 (V) uzE嘉泰姆	R-Top (milohm) uzE嘉泰姆	R-Sync (milohm) uzE嘉泰姆	Iq (No load) (uA) uzE嘉泰姆
Part_No uzE嘉泰姆	PackageuzE嘉泰姆	ArchitectuuzE嘉泰姆	No.ofuzE嘉泰姆 PWM uzE嘉泰姆 OutpuuzE嘉泰姆	DriveuzE嘉泰姆 LoutuzE嘉泰姆 (A) uzE嘉泰姆	minuzE嘉泰姆	maxuzE嘉泰姆	FmaxuzE嘉泰姆 Khz uzE嘉泰姆	Vref uzE嘉泰姆 (V) uzE嘉泰姆	R-Top (milohm) uzE嘉泰姆	R-Sync (milohm) uzE嘉泰姆	Iq (No load) (uA) uzE嘉泰姆
CXSD62122uzE嘉泰姆	TQFN5x6-28uzE嘉泰姆	CMuzE嘉泰姆	1uzE嘉泰姆	5uzE嘉泰姆	4.5uzE嘉泰姆	26uzE嘉泰姆	380uzE嘉泰姆	0.8uzE嘉泰姆	50uzE嘉泰姆	20uzE嘉泰姆	1000uzE嘉泰姆
CXSD62123uzE嘉泰姆	SOP-8uzE嘉泰姆	CMuzE嘉泰姆	1uzE嘉泰姆	2uzE嘉泰姆	4.5uzE嘉泰姆	26uzE嘉泰姆	380uzE嘉泰姆	0.8uzE嘉泰姆	100uzE嘉泰姆		1000uzE嘉泰姆
CXSD62124uzE嘉泰姆	SOP-8PuzE嘉泰姆	CMuzE嘉泰姆	1uzE嘉泰姆	4uzE嘉泰姆	4.5uzE嘉泰姆	26uzE嘉泰姆	380uzE嘉泰姆	0.8uzE嘉泰姆	80uzE嘉泰姆		1000uzE嘉泰姆
CXSD62125uzE嘉泰姆	SOT23-5\|TSOT23-5uzE嘉泰姆	CMuzE嘉泰姆	1uzE嘉泰姆	1uzE嘉泰姆	2.7uzE嘉泰姆	6uzE嘉泰姆	1500uzE嘉泰姆	0.6uzE嘉泰姆	280uzE嘉泰姆	250uzE嘉泰姆	25uzE嘉泰姆
CXSD62125AuzE嘉泰姆	SOT23-5uzE嘉泰姆	CMuzE嘉泰姆	1uzE嘉泰姆	1uzE嘉泰姆	2.7uzE嘉泰姆	6uzE嘉泰姆	1500uzE嘉泰姆	0.6uzE嘉泰姆	280uzE嘉泰姆	250uzE嘉泰姆
CXSD62126uzE嘉泰姆	SOP-8uzE嘉泰姆	CMuzE嘉泰姆	1uzE嘉泰姆	3uzE嘉泰姆	4.3uzE嘉泰姆	14uzE嘉泰姆	500uzE嘉泰姆	0.8uzE嘉泰姆	70uzE嘉泰姆	70uzE嘉泰姆	500uzE嘉泰姆
CXSD62127uzE嘉泰姆	SOP-8PuzE嘉泰姆	CMuzE嘉泰姆	1uzE嘉泰姆	3uzE嘉泰姆	4.3uzE嘉泰姆	14uzE嘉泰姆	500uzE嘉泰姆	0.8uzE嘉泰姆	55uzE嘉泰姆	45uzE嘉泰姆	500uzE嘉泰姆
CXSD62128BuzE嘉泰姆	TDFN3x3-10uzE嘉泰姆			3uzE嘉泰姆	2.6uzE嘉泰姆	5.5uzE嘉泰姆	2000uzE嘉泰姆	0.8uzE嘉泰姆	110uzE嘉泰姆	110uzE嘉泰姆	460uzE嘉泰姆
CXSD62129uzE嘉泰姆	TDFN3x3-10uzE嘉泰姆	CMuzE嘉泰姆	2uzE嘉泰姆	1uzE嘉泰姆	2.7uzE嘉泰姆	6uzE嘉泰姆	1500uzE嘉泰姆	0.6uzE嘉泰姆	280uzE嘉泰姆	250uzE嘉泰姆	500uzE嘉泰姆
CXSD62129AuzE嘉泰姆	TDFN3x3-10uzE嘉泰姆	CMuzE嘉泰姆	2uzE嘉泰姆	1uzE嘉泰姆	2.7uzE嘉泰姆	6uzE嘉泰姆	1500uzE嘉泰姆	0.6uzE嘉泰姆	280uzE嘉泰姆	250uzE嘉泰姆
CXSD62130uzE嘉泰姆	TDFN2x2-6uzE嘉泰姆	CMuzE嘉泰姆	1uzE嘉泰姆	1uzE嘉泰姆	2.7uzE嘉泰姆	6uzE嘉泰姆	1500uzE嘉泰姆	0.6uzE嘉泰姆	280uzE嘉泰姆	250uzE嘉泰姆	25uzE嘉泰姆
CXSD62130AuzE嘉泰姆	TDFN2x2-6uzE嘉泰姆	CMuzE嘉泰姆	1uzE嘉泰姆	1uzE嘉泰姆	2.7uzE嘉泰姆	6uzE嘉泰姆	1500uzE嘉泰姆	0.6uzE嘉泰姆	280uzE嘉泰姆	250uzE嘉泰姆
CXSD62131uzE嘉泰姆	TDFN3x3-12uzE嘉泰姆	CMuzE嘉泰姆	2uzE嘉泰姆	1uzE嘉泰姆	2.7uzE嘉泰姆	6uzE嘉泰姆	1500uzE嘉泰姆	0.6uzE嘉泰姆	280uzE嘉泰姆	250uzE嘉泰姆	25uzE嘉泰姆
CXSD62131AuzE嘉泰姆	TDFN3x3-12uzE嘉泰姆	CMuzE嘉泰姆	2uzE嘉泰姆	1uzE嘉泰姆	2.7uzE嘉泰姆	6uzE嘉泰姆	1500uzE嘉泰姆	0.6uzE嘉泰姆	280uzE嘉泰姆	250uzE嘉泰姆
CXSD62131CuzE嘉泰姆	TDFN 3x3 12uzE嘉泰姆	CMuzE嘉泰姆	2uzE嘉泰姆	1uzE嘉泰姆	3uzE嘉泰姆	5.5uzE嘉泰姆	1500uzE嘉泰姆	0.6uzE嘉泰姆	280uzE嘉泰姆	250uzE嘉泰姆	30uzE嘉泰姆
CXSD62132uzE嘉泰姆	TQFN3x3-20uzE嘉泰姆	CMuzE嘉泰姆	3uzE嘉泰姆	2uzE嘉泰姆	2.9uzE嘉泰姆	5.5uzE嘉泰姆	1500uzE嘉泰姆	0.6uzE嘉泰姆	-uzE嘉泰姆	-uzE嘉泰姆	300uzE嘉泰姆
CXSD62133uzE嘉泰姆	TDFN2x2-8uzE嘉泰姆	CMuzE嘉泰姆	1uzE嘉泰姆	1uzE嘉泰姆	3.3uzE嘉泰姆	8uzE嘉泰姆	1500uzE嘉泰姆	0.6uzE嘉泰姆	280uzE嘉泰姆	250uzE嘉泰姆	25uzE嘉泰姆
CXSD62134uzE嘉泰姆	SOP-8uzE嘉泰姆	CMuzE嘉泰姆	1uzE嘉泰姆	2uzE嘉泰姆	4.5uzE嘉泰姆	24uzE嘉泰姆	340uzE嘉泰姆	0.925uzE嘉泰姆	110uzE嘉泰姆	110uzE嘉泰姆	1900uzE嘉泰姆
CXSD62135uzE嘉泰姆	SOP-8PuzE嘉泰姆	CMuzE嘉泰姆	1uzE嘉泰姆	3uzE嘉泰姆	4.5uzE嘉泰姆	24uzE嘉泰姆	340uzE嘉泰姆	0.925uzE嘉泰姆	110uzE嘉泰姆	110uzE嘉泰姆	1900uzE嘉泰姆

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