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

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发表时间：2020-04-28浏览次数：75

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

1.产品概述         2.产品特点Od7嘉泰姆
3.应用范围       4.下载产品资料PDF文档 Od7嘉泰姆
5.产品封装图                     6.电路原理图             Od7嘉泰姆
7.功能概述       8.相关产品Od7嘉泰姆

一,产品概述(General Description) Od7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.Od7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.Od7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.Od7嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.Od7嘉泰姆
二.产品特点(Features)Od7嘉泰姆
Wide Input Voltage from 4.5V to 24VOd7嘉泰姆
3A Continuous Output CurrentOd7嘉泰姆
Adjustable Output Voltage from 0.925V to 20VOd7嘉泰姆
Intergrated High/Low Side MOSFETOd7嘉泰姆
PFM/PWM mode OperationOd7嘉泰姆
Fixed 340kHz Switching FrequencyOd7嘉泰姆
Stable with Low ESR Ceramic Output CapacitorsOd7嘉泰姆
Power-On-Reset DetectionOd7嘉泰姆
Programmable Soft-StartOd7嘉泰姆
Over-Temperature ProtectionOd7嘉泰姆
Current-Limit Protection with Frequency FoldbackOd7嘉泰姆
Enable/Shutdown FunctionOd7嘉泰姆
Small SOP-8P PackageOd7嘉泰姆
Lead Free and Green Devices AvailableOd7嘉泰姆
(RoHS CompliantOd7嘉泰姆
三,应用范围 (Applications)Od7嘉泰姆

LCD Monitor/TVOd7嘉泰姆

Set-Top BoxOd7嘉泰姆
DSL, Switch HUBOd7嘉泰姆
Notebook ComputerOd7嘉泰姆

四.下载产品资料PDF文档 Od7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！Od7嘉泰姆

QQ截图20160419174301.jpg Od7嘉泰姆

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五,产品封装图 (Package)Od7嘉泰姆

Od7嘉泰姆

六.电路原理图Od7嘉泰姆

Od7嘉泰姆

七,功能概述Od7嘉泰姆

Main Control LoopOd7嘉泰姆
The CXSD62144 is a constant frequency current mode switching regulator. During normal operation, the inter-Od7嘉泰姆
nal N-channel power MOSFET is turned on each cycle when the oscillator sets an internal RS latch and wouldOd7嘉泰姆
be turned off when an internal current comparator (ICMP) resets the latch. The peak inductor current at which ICMPOd7嘉泰姆
resets the RS latch is controlled by the voltage on the COMP pin, which is the output of the error amplifierOd7嘉泰姆
(EAMP). An external resistive divider connected between VOUT and ground allows the EAMP to receive an outputOd7嘉泰姆
feedback voltage VFB at FB pin. When the load current increases, it causes a slight decrease in VFB relative toOd7嘉泰姆
the 0.925V reference, which in turn causes the COMP voltage to increase until the average inductor currentOd7嘉泰姆
matches the new load current.Od7嘉泰姆
VIN Power-On-Reset (POR) and EN Under-voltage LockoutOd7嘉泰姆
The CXSD62144 keep monitoring the voltage on VIN pin to prevent wrong logic operations which may occur whenOd7嘉泰姆
VIN voltage is not high enough for the internal control circuitry to operate. The VIN POR has a rising thresholdOd7嘉泰姆
of 4.05V (typical) with 0.3V of hysteresis.Od7嘉泰姆
An external under-voltage lockout (UVLO) is sensed atthe EN pin. The EN UVLO has a rising threshold of 2.5VOd7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 ENOd7嘉泰姆
voltages exceed their respective voltage thresholds, the IC starts a start-up process and then ramps up the outputOd7嘉泰姆
voltage to the setting of output voltage.Od7嘉泰姆
Over-Temperature Protection (OTP)Od7嘉泰姆
The over-temperature circuit limits the junction tempera-ture of the CXSD62144 When the junction temperature ex-Od7嘉泰姆
ceeds TJ =+160oC, a thermal sensor turns off the power MOSFET, allowing the device to cool down. The thermalOd7嘉泰姆
sensor allows the converter to start a start-up process and regulate the output voltage again after the junctionOd7嘉泰姆
temperature cools by 50oC.Od7嘉泰姆
The OTP designed with a 50 oC hysteresis lowers the average T J during c ontinuous thermal overload conditions,Od7嘉泰姆
increasing life time of the IC.Od7嘉泰姆
Enable/ShutdownOd7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.Od7嘉泰姆
Current-Limit ProtectionOd7嘉泰姆
The CXSD62144 monitors the output current, flowing through the N-Channel power MOSFET, and limits theOd7嘉泰姆
IC from damages during overload, short-circuit and over-voltage conditions.Od7嘉泰姆
Frequency FoldbackOd7嘉泰姆
The foldback frequency is controlled by the FB voltage.When the FB pin voltage is under 0.6V, the frequency ofOd7嘉泰姆
the oscillator will be reduced to 110kHz. This lower fre-quency allows the inductor current to safely discharge,Od7嘉泰姆
thereby preventing current runaway. The oscillator’s fre-quency will switch to its designed rate when the feedbackOd7嘉泰姆
voltage on FB rises above the rising frequency foldback threshold (0.6V, typical) again.Od7嘉泰姆
Over-Voltage ProtectionOd7嘉泰姆
The over-voltage function monitors the output voltage by FB pin. When the FB voltage increase over 120% of theOd7嘉泰姆
reference voltage, the over-voltage protection compara-tor will force the high-and low-side MOSFET gate driverOd7嘉泰姆
off. As soon as the output voltage is within regulation, the OVP comparator is disengaged. The chip will restore itsOd7嘉泰姆
normal operation.Od7嘉泰姆
八,相关产品 更多同类产品.......Od7嘉泰姆

Switching Regulator > Buck ConverterOd7嘉泰姆
Part_No Od7嘉泰姆	PackageOd7嘉泰姆	ArchitectuOd7嘉泰姆	No.ofOd7嘉泰姆 PWM Od7嘉泰姆 OutpuOd7嘉泰姆	DriveOd7嘉泰姆 LoutOd7嘉泰姆 (A) Od7嘉泰姆	Vin(V) Od7嘉泰姆		FmaxOd7嘉泰姆 Khz Od7嘉泰姆	Vref Od7嘉泰姆 (V) Od7嘉泰姆	R-Top (milohm) Od7嘉泰姆	R-Sync (milohm) Od7嘉泰姆	Iq (No load) (uA) Od7嘉泰姆
Part_No Od7嘉泰姆	PackageOd7嘉泰姆	ArchitectuOd7嘉泰姆	No.ofOd7嘉泰姆 PWM Od7嘉泰姆 OutpuOd7嘉泰姆	DriveOd7嘉泰姆 LoutOd7嘉泰姆 (A) Od7嘉泰姆	minOd7嘉泰姆	maxOd7嘉泰姆	FmaxOd7嘉泰姆 Khz Od7嘉泰姆	Vref Od7嘉泰姆 (V) Od7嘉泰姆	R-Top (milohm) Od7嘉泰姆	R-Sync (milohm) Od7嘉泰姆	Iq (No load) (uA) Od7嘉泰姆
CXSD62122Od7嘉泰姆	TQFN5x6-28Od7嘉泰姆	CMOd7嘉泰姆	1Od7嘉泰姆	5Od7嘉泰姆	4.5Od7嘉泰姆	26Od7嘉泰姆	380Od7嘉泰姆	0.8Od7嘉泰姆	50Od7嘉泰姆	20Od7嘉泰姆	1000Od7嘉泰姆
CXSD62123Od7嘉泰姆	SOP-8Od7嘉泰姆	CMOd7嘉泰姆	1Od7嘉泰姆	2Od7嘉泰姆	4.5Od7嘉泰姆	26Od7嘉泰姆	380Od7嘉泰姆	0.8Od7嘉泰姆	100Od7嘉泰姆		1000Od7嘉泰姆
CXSD62124Od7嘉泰姆	SOP-8POd7嘉泰姆	CMOd7嘉泰姆	1Od7嘉泰姆	4Od7嘉泰姆	4.5Od7嘉泰姆	26Od7嘉泰姆	380Od7嘉泰姆	0.8Od7嘉泰姆	80Od7嘉泰姆		1000Od7嘉泰姆
CXSD62125Od7嘉泰姆	SOT23-5\|TSOT23-5Od7嘉泰姆	CMOd7嘉泰姆	1Od7嘉泰姆	1Od7嘉泰姆	2.7Od7嘉泰姆	6Od7嘉泰姆	1500Od7嘉泰姆	0.6Od7嘉泰姆	280Od7嘉泰姆	250Od7嘉泰姆	25Od7嘉泰姆
CXSD62125AOd7嘉泰姆	SOT23-5Od7嘉泰姆	CMOd7嘉泰姆	1Od7嘉泰姆	1Od7嘉泰姆	2.7Od7嘉泰姆	6Od7嘉泰姆	1500Od7嘉泰姆	0.6Od7嘉泰姆	280Od7嘉泰姆	250Od7嘉泰姆
CXSD62126Od7嘉泰姆	SOP-8Od7嘉泰姆	CMOd7嘉泰姆	1Od7嘉泰姆	3Od7嘉泰姆	4.3Od7嘉泰姆	14Od7嘉泰姆	500Od7嘉泰姆	0.8Od7嘉泰姆	70Od7嘉泰姆	70Od7嘉泰姆	500Od7嘉泰姆
CXSD62127Od7嘉泰姆	SOP-8POd7嘉泰姆	CMOd7嘉泰姆	1Od7嘉泰姆	3Od7嘉泰姆	4.3Od7嘉泰姆	14Od7嘉泰姆	500Od7嘉泰姆	0.8Od7嘉泰姆	55Od7嘉泰姆	45Od7嘉泰姆	500Od7嘉泰姆
CXSD62128BOd7嘉泰姆	TDFN3x3-10Od7嘉泰姆			3Od7嘉泰姆	2.6Od7嘉泰姆	5.5Od7嘉泰姆	2000Od7嘉泰姆	0.8Od7嘉泰姆	110Od7嘉泰姆	110Od7嘉泰姆	460Od7嘉泰姆
CXSD62129Od7嘉泰姆	TDFN3x3-10Od7嘉泰姆	CMOd7嘉泰姆	2Od7嘉泰姆	1Od7嘉泰姆	2.7Od7嘉泰姆	6Od7嘉泰姆	1500Od7嘉泰姆	0.6Od7嘉泰姆	280Od7嘉泰姆	250Od7嘉泰姆	500Od7嘉泰姆
CXSD62129AOd7嘉泰姆	TDFN3x3-10Od7嘉泰姆	CMOd7嘉泰姆	2Od7嘉泰姆	1Od7嘉泰姆	2.7Od7嘉泰姆	6Od7嘉泰姆	1500Od7嘉泰姆	0.6Od7嘉泰姆	280Od7嘉泰姆	250Od7嘉泰姆
CXSD62130Od7嘉泰姆	TDFN2x2-6Od7嘉泰姆	CMOd7嘉泰姆	1Od7嘉泰姆	1Od7嘉泰姆	2.7Od7嘉泰姆	6Od7嘉泰姆	1500Od7嘉泰姆	0.6Od7嘉泰姆	280Od7嘉泰姆	250Od7嘉泰姆	25Od7嘉泰姆
CXSD62130AOd7嘉泰姆	TDFN2x2-6Od7嘉泰姆	CMOd7嘉泰姆	1Od7嘉泰姆	1Od7嘉泰姆	2.7Od7嘉泰姆	6Od7嘉泰姆	1500Od7嘉泰姆	0.6Od7嘉泰姆	280Od7嘉泰姆	250Od7嘉泰姆
CXSD62131Od7嘉泰姆	TDFN3x3-12Od7嘉泰姆	CMOd7嘉泰姆	2Od7嘉泰姆	1Od7嘉泰姆	2.7Od7嘉泰姆	6Od7嘉泰姆	1500Od7嘉泰姆	0.6Od7嘉泰姆	280Od7嘉泰姆	250Od7嘉泰姆	25Od7嘉泰姆
CXSD62131AOd7嘉泰姆	TDFN3x3-12Od7嘉泰姆	CMOd7嘉泰姆	2Od7嘉泰姆	1Od7嘉泰姆	2.7Od7嘉泰姆	6Od7嘉泰姆	1500Od7嘉泰姆	0.6Od7嘉泰姆	280Od7嘉泰姆	250Od7嘉泰姆
CXSD62131COd7嘉泰姆	TDFN 3x3 12Od7嘉泰姆	CMOd7嘉泰姆	2Od7嘉泰姆	1Od7嘉泰姆	3Od7嘉泰姆	5.5Od7嘉泰姆	1500Od7嘉泰姆	0.6Od7嘉泰姆	280Od7嘉泰姆	250Od7嘉泰姆	30Od7嘉泰姆
CXSD62132Od7嘉泰姆	TQFN3x3-20Od7嘉泰姆	CMOd7嘉泰姆	3Od7嘉泰姆	2Od7嘉泰姆	2.9Od7嘉泰姆	5.5Od7嘉泰姆	1500Od7嘉泰姆	0.6Od7嘉泰姆	-Od7嘉泰姆	-Od7嘉泰姆	300Od7嘉泰姆
CXSD62133Od7嘉泰姆	TDFN2x2-8Od7嘉泰姆	CMOd7嘉泰姆	1Od7嘉泰姆	1Od7嘉泰姆	3.3Od7嘉泰姆	8Od7嘉泰姆	1500Od7嘉泰姆	0.6Od7嘉泰姆	280Od7嘉泰姆	250Od7嘉泰姆	25Od7嘉泰姆
CXSD62134Od7嘉泰姆	SOP-8Od7嘉泰姆	CMOd7嘉泰姆	1Od7嘉泰姆	2Od7嘉泰姆	4.5Od7嘉泰姆	24Od7嘉泰姆	340Od7嘉泰姆	0.925Od7嘉泰姆	110Od7嘉泰姆	110Od7嘉泰姆	1900Od7嘉泰姆
CXSD62135Od7嘉泰姆	SOP-8POd7嘉泰姆	CMOd7嘉泰姆	1Od7嘉泰姆	3Od7嘉泰姆	4.5Od7嘉泰姆	24Od7嘉泰姆	340Od7嘉泰姆	0.925Od7嘉泰姆	110Od7嘉泰姆	110Od7嘉泰姆	1900Od7嘉泰姆

上一篇：带Adj的高输入电压8A脉宽调制转换器CXSD62143软启动同步降压转换器30mW N沟道高侧MOSFET和9mW低侧MOSFET

下一篇：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

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