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：174

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

一,产品概述(General Description) BLA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.BLA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.BLA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.BLA嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.BLA嘉泰姆
二.产品特点(Features)BLA嘉泰姆
Wide Input Voltage from 4.5V to 24VBLA嘉泰姆
3A Continuous Output CurrentBLA嘉泰姆
Adjustable Output Voltage from 0.925V to 20VBLA嘉泰姆
Intergrated High/Low Side MOSFETBLA嘉泰姆
PFM/PWM mode OperationBLA嘉泰姆
Fixed 340kHz Switching FrequencyBLA嘉泰姆
Stable with Low ESR Ceramic Output CapacitorsBLA嘉泰姆
Power-On-Reset DetectionBLA嘉泰姆
Programmable Soft-StartBLA嘉泰姆
Over-Temperature ProtectionBLA嘉泰姆
Current-Limit Protection with Frequency FoldbackBLA嘉泰姆
Enable/Shutdown FunctionBLA嘉泰姆
Small SOP-8P PackageBLA嘉泰姆
Lead Free and Green Devices AvailableBLA嘉泰姆
(RoHS CompliantBLA嘉泰姆
三,应用范围 (Applications)BLA嘉泰姆

LCD Monitor/TVBLA嘉泰姆

Set-Top BoxBLA嘉泰姆
DSL, Switch HUBBLA嘉泰姆
Notebook ComputerBLA嘉泰姆

四.下载产品资料PDF文档 BLA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！BLA嘉泰姆

QQ截图20160419174301.jpg BLA嘉泰姆

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五,产品封装图 (Package)BLA嘉泰姆

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六.电路原理图BLA嘉泰姆

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七,功能概述BLA嘉泰姆

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

Switching Regulator > Buck ConverterBLA嘉泰姆
Part_No BLA嘉泰姆	PackageBLA嘉泰姆	ArchitectuBLA嘉泰姆	No.ofBLA嘉泰姆 PWM BLA嘉泰姆 OutpuBLA嘉泰姆	DriveBLA嘉泰姆 LoutBLA嘉泰姆 (A) BLA嘉泰姆	Vin(V) BLA嘉泰姆		FmaxBLA嘉泰姆 Khz BLA嘉泰姆	Vref BLA嘉泰姆 (V) BLA嘉泰姆	R-Top (milohm) BLA嘉泰姆	R-Sync (milohm) BLA嘉泰姆	Iq (No load) (uA) BLA嘉泰姆
Part_No BLA嘉泰姆	PackageBLA嘉泰姆	ArchitectuBLA嘉泰姆	No.ofBLA嘉泰姆 PWM BLA嘉泰姆 OutpuBLA嘉泰姆	DriveBLA嘉泰姆 LoutBLA嘉泰姆 (A) BLA嘉泰姆	minBLA嘉泰姆	maxBLA嘉泰姆	FmaxBLA嘉泰姆 Khz BLA嘉泰姆	Vref BLA嘉泰姆 (V) BLA嘉泰姆	R-Top (milohm) BLA嘉泰姆	R-Sync (milohm) BLA嘉泰姆	Iq (No load) (uA) BLA嘉泰姆
CXSD62122BLA嘉泰姆	TQFN5x6-28BLA嘉泰姆	CMBLA嘉泰姆	1BLA嘉泰姆	5BLA嘉泰姆	4.5BLA嘉泰姆	26BLA嘉泰姆	380BLA嘉泰姆	0.8BLA嘉泰姆	50BLA嘉泰姆	20BLA嘉泰姆	1000BLA嘉泰姆
CXSD62123BLA嘉泰姆	SOP-8BLA嘉泰姆	CMBLA嘉泰姆	1BLA嘉泰姆	2BLA嘉泰姆	4.5BLA嘉泰姆	26BLA嘉泰姆	380BLA嘉泰姆	0.8BLA嘉泰姆	100BLA嘉泰姆		1000BLA嘉泰姆
CXSD62124BLA嘉泰姆	SOP-8PBLA嘉泰姆	CMBLA嘉泰姆	1BLA嘉泰姆	4BLA嘉泰姆	4.5BLA嘉泰姆	26BLA嘉泰姆	380BLA嘉泰姆	0.8BLA嘉泰姆	80BLA嘉泰姆		1000BLA嘉泰姆
CXSD62125BLA嘉泰姆	SOT23-5\|TSOT23-5BLA嘉泰姆	CMBLA嘉泰姆	1BLA嘉泰姆	1BLA嘉泰姆	2.7BLA嘉泰姆	6BLA嘉泰姆	1500BLA嘉泰姆	0.6BLA嘉泰姆	280BLA嘉泰姆	250BLA嘉泰姆	25BLA嘉泰姆
CXSD62125ABLA嘉泰姆	SOT23-5BLA嘉泰姆	CMBLA嘉泰姆	1BLA嘉泰姆	1BLA嘉泰姆	2.7BLA嘉泰姆	6BLA嘉泰姆	1500BLA嘉泰姆	0.6BLA嘉泰姆	280BLA嘉泰姆	250BLA嘉泰姆
CXSD62126BLA嘉泰姆	SOP-8BLA嘉泰姆	CMBLA嘉泰姆	1BLA嘉泰姆	3BLA嘉泰姆	4.3BLA嘉泰姆	14BLA嘉泰姆	500BLA嘉泰姆	0.8BLA嘉泰姆	70BLA嘉泰姆	70BLA嘉泰姆	500BLA嘉泰姆
CXSD62127BLA嘉泰姆	SOP-8PBLA嘉泰姆	CMBLA嘉泰姆	1BLA嘉泰姆	3BLA嘉泰姆	4.3BLA嘉泰姆	14BLA嘉泰姆	500BLA嘉泰姆	0.8BLA嘉泰姆	55BLA嘉泰姆	45BLA嘉泰姆	500BLA嘉泰姆
CXSD62128BBLA嘉泰姆	TDFN3x3-10BLA嘉泰姆			3BLA嘉泰姆	2.6BLA嘉泰姆	5.5BLA嘉泰姆	2000BLA嘉泰姆	0.8BLA嘉泰姆	110BLA嘉泰姆	110BLA嘉泰姆	460BLA嘉泰姆
CXSD62129BLA嘉泰姆	TDFN3x3-10BLA嘉泰姆	CMBLA嘉泰姆	2BLA嘉泰姆	1BLA嘉泰姆	2.7BLA嘉泰姆	6BLA嘉泰姆	1500BLA嘉泰姆	0.6BLA嘉泰姆	280BLA嘉泰姆	250BLA嘉泰姆	500BLA嘉泰姆
CXSD62129ABLA嘉泰姆	TDFN3x3-10BLA嘉泰姆	CMBLA嘉泰姆	2BLA嘉泰姆	1BLA嘉泰姆	2.7BLA嘉泰姆	6BLA嘉泰姆	1500BLA嘉泰姆	0.6BLA嘉泰姆	280BLA嘉泰姆	250BLA嘉泰姆
CXSD62130BLA嘉泰姆	TDFN2x2-6BLA嘉泰姆	CMBLA嘉泰姆	1BLA嘉泰姆	1BLA嘉泰姆	2.7BLA嘉泰姆	6BLA嘉泰姆	1500BLA嘉泰姆	0.6BLA嘉泰姆	280BLA嘉泰姆	250BLA嘉泰姆	25BLA嘉泰姆
CXSD62130ABLA嘉泰姆	TDFN2x2-6BLA嘉泰姆	CMBLA嘉泰姆	1BLA嘉泰姆	1BLA嘉泰姆	2.7BLA嘉泰姆	6BLA嘉泰姆	1500BLA嘉泰姆	0.6BLA嘉泰姆	280BLA嘉泰姆	250BLA嘉泰姆
CXSD62131BLA嘉泰姆	TDFN3x3-12BLA嘉泰姆	CMBLA嘉泰姆	2BLA嘉泰姆	1BLA嘉泰姆	2.7BLA嘉泰姆	6BLA嘉泰姆	1500BLA嘉泰姆	0.6BLA嘉泰姆	280BLA嘉泰姆	250BLA嘉泰姆	25BLA嘉泰姆
CXSD62131ABLA嘉泰姆	TDFN3x3-12BLA嘉泰姆	CMBLA嘉泰姆	2BLA嘉泰姆	1BLA嘉泰姆	2.7BLA嘉泰姆	6BLA嘉泰姆	1500BLA嘉泰姆	0.6BLA嘉泰姆	280BLA嘉泰姆	250BLA嘉泰姆
CXSD62131CBLA嘉泰姆	TDFN 3x3 12BLA嘉泰姆	CMBLA嘉泰姆	2BLA嘉泰姆	1BLA嘉泰姆	3BLA嘉泰姆	5.5BLA嘉泰姆	1500BLA嘉泰姆	0.6BLA嘉泰姆	280BLA嘉泰姆	250BLA嘉泰姆	30BLA嘉泰姆
CXSD62132BLA嘉泰姆	TQFN3x3-20BLA嘉泰姆	CMBLA嘉泰姆	3BLA嘉泰姆	2BLA嘉泰姆	2.9BLA嘉泰姆	5.5BLA嘉泰姆	1500BLA嘉泰姆	0.6BLA嘉泰姆	-BLA嘉泰姆	-BLA嘉泰姆	300BLA嘉泰姆
CXSD62133BLA嘉泰姆	TDFN2x2-8BLA嘉泰姆	CMBLA嘉泰姆	1BLA嘉泰姆	1BLA嘉泰姆	3.3BLA嘉泰姆	8BLA嘉泰姆	1500BLA嘉泰姆	0.6BLA嘉泰姆	280BLA嘉泰姆	250BLA嘉泰姆	25BLA嘉泰姆
CXSD62134BLA嘉泰姆	SOP-8BLA嘉泰姆	CMBLA嘉泰姆	1BLA嘉泰姆	2BLA嘉泰姆	4.5BLA嘉泰姆	24BLA嘉泰姆	340BLA嘉泰姆	0.925BLA嘉泰姆	110BLA嘉泰姆	110BLA嘉泰姆	1900BLA嘉泰姆
CXSD62135BLA嘉泰姆	SOP-8PBLA嘉泰姆	CMBLA嘉泰姆	1BLA嘉泰姆	3BLA嘉泰姆	4.5BLA嘉泰姆	24BLA嘉泰姆	340BLA嘉泰姆	0.925BLA嘉泰姆	110BLA嘉泰姆	110BLA嘉泰姆	1900BLA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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