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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发表时间：2020-04-28浏览次数：157

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

一,产品概述(General Description) KfO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.KfO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.KfO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.KfO嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.KfO嘉泰姆
二.产品特点(Features)KfO嘉泰姆
Wide Input Voltage from 4.5V to 24VKfO嘉泰姆
3A Continuous Output CurrentKfO嘉泰姆
Adjustable Output Voltage from 0.925V to 20VKfO嘉泰姆
Intergrated High/Low Side MOSFETKfO嘉泰姆
PFM/PWM mode OperationKfO嘉泰姆
Fixed 340kHz Switching FrequencyKfO嘉泰姆
Stable with Low ESR Ceramic Output CapacitorsKfO嘉泰姆
Power-On-Reset DetectionKfO嘉泰姆
Programmable Soft-StartKfO嘉泰姆
Over-Temperature ProtectionKfO嘉泰姆
Current-Limit Protection with Frequency FoldbackKfO嘉泰姆
Enable/Shutdown FunctionKfO嘉泰姆
Small SOP-8P PackageKfO嘉泰姆
Lead Free and Green Devices AvailableKfO嘉泰姆
(RoHS CompliantKfO嘉泰姆
三,应用范围 (Applications)KfO嘉泰姆

LCD Monitor/TVKfO嘉泰姆

Set-Top BoxKfO嘉泰姆
DSL, Switch HUBKfO嘉泰姆
Notebook ComputerKfO嘉泰姆

四.下载产品资料PDF文档 KfO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！KfO嘉泰姆

QQ截图20160419174301.jpg KfO嘉泰姆

KfO嘉泰姆

五,产品封装图 (Package)KfO嘉泰姆

KfO嘉泰姆

六.电路原理图KfO嘉泰姆

KfO嘉泰姆

七,功能概述KfO嘉泰姆

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

Switching Regulator > Buck ConverterKfO嘉泰姆
Part_No KfO嘉泰姆	PackageKfO嘉泰姆	ArchitectuKfO嘉泰姆	No.ofKfO嘉泰姆 PWM KfO嘉泰姆 OutpuKfO嘉泰姆	DriveKfO嘉泰姆 LoutKfO嘉泰姆 (A) KfO嘉泰姆	Vin(V) KfO嘉泰姆		FmaxKfO嘉泰姆 Khz KfO嘉泰姆	Vref KfO嘉泰姆 (V) KfO嘉泰姆	R-Top (milohm) KfO嘉泰姆	R-Sync (milohm) KfO嘉泰姆	Iq (No load) (uA) KfO嘉泰姆
Part_No KfO嘉泰姆	PackageKfO嘉泰姆	ArchitectuKfO嘉泰姆	No.ofKfO嘉泰姆 PWM KfO嘉泰姆 OutpuKfO嘉泰姆	DriveKfO嘉泰姆 LoutKfO嘉泰姆 (A) KfO嘉泰姆	minKfO嘉泰姆	maxKfO嘉泰姆	FmaxKfO嘉泰姆 Khz KfO嘉泰姆	Vref KfO嘉泰姆 (V) KfO嘉泰姆	R-Top (milohm) KfO嘉泰姆	R-Sync (milohm) KfO嘉泰姆	Iq (No load) (uA) KfO嘉泰姆
CXSD62122KfO嘉泰姆	TQFN5x6-28KfO嘉泰姆	CMKfO嘉泰姆	1KfO嘉泰姆	5KfO嘉泰姆	4.5KfO嘉泰姆	26KfO嘉泰姆	380KfO嘉泰姆	0.8KfO嘉泰姆	50KfO嘉泰姆	20KfO嘉泰姆	1000KfO嘉泰姆
CXSD62123KfO嘉泰姆	SOP-8KfO嘉泰姆	CMKfO嘉泰姆	1KfO嘉泰姆	2KfO嘉泰姆	4.5KfO嘉泰姆	26KfO嘉泰姆	380KfO嘉泰姆	0.8KfO嘉泰姆	100KfO嘉泰姆		1000KfO嘉泰姆
CXSD62124KfO嘉泰姆	SOP-8PKfO嘉泰姆	CMKfO嘉泰姆	1KfO嘉泰姆	4KfO嘉泰姆	4.5KfO嘉泰姆	26KfO嘉泰姆	380KfO嘉泰姆	0.8KfO嘉泰姆	80KfO嘉泰姆		1000KfO嘉泰姆
CXSD62125KfO嘉泰姆	SOT23-5\|TSOT23-5KfO嘉泰姆	CMKfO嘉泰姆	1KfO嘉泰姆	1KfO嘉泰姆	2.7KfO嘉泰姆	6KfO嘉泰姆	1500KfO嘉泰姆	0.6KfO嘉泰姆	280KfO嘉泰姆	250KfO嘉泰姆	25KfO嘉泰姆
CXSD62125AKfO嘉泰姆	SOT23-5KfO嘉泰姆	CMKfO嘉泰姆	1KfO嘉泰姆	1KfO嘉泰姆	2.7KfO嘉泰姆	6KfO嘉泰姆	1500KfO嘉泰姆	0.6KfO嘉泰姆	280KfO嘉泰姆	250KfO嘉泰姆
CXSD62126KfO嘉泰姆	SOP-8KfO嘉泰姆	CMKfO嘉泰姆	1KfO嘉泰姆	3KfO嘉泰姆	4.3KfO嘉泰姆	14KfO嘉泰姆	500KfO嘉泰姆	0.8KfO嘉泰姆	70KfO嘉泰姆	70KfO嘉泰姆	500KfO嘉泰姆
CXSD62127KfO嘉泰姆	SOP-8PKfO嘉泰姆	CMKfO嘉泰姆	1KfO嘉泰姆	3KfO嘉泰姆	4.3KfO嘉泰姆	14KfO嘉泰姆	500KfO嘉泰姆	0.8KfO嘉泰姆	55KfO嘉泰姆	45KfO嘉泰姆	500KfO嘉泰姆
CXSD62128BKfO嘉泰姆	TDFN3x3-10KfO嘉泰姆			3KfO嘉泰姆	2.6KfO嘉泰姆	5.5KfO嘉泰姆	2000KfO嘉泰姆	0.8KfO嘉泰姆	110KfO嘉泰姆	110KfO嘉泰姆	460KfO嘉泰姆
CXSD62129KfO嘉泰姆	TDFN3x3-10KfO嘉泰姆	CMKfO嘉泰姆	2KfO嘉泰姆	1KfO嘉泰姆	2.7KfO嘉泰姆	6KfO嘉泰姆	1500KfO嘉泰姆	0.6KfO嘉泰姆	280KfO嘉泰姆	250KfO嘉泰姆	500KfO嘉泰姆
CXSD62129AKfO嘉泰姆	TDFN3x3-10KfO嘉泰姆	CMKfO嘉泰姆	2KfO嘉泰姆	1KfO嘉泰姆	2.7KfO嘉泰姆	6KfO嘉泰姆	1500KfO嘉泰姆	0.6KfO嘉泰姆	280KfO嘉泰姆	250KfO嘉泰姆
CXSD62130KfO嘉泰姆	TDFN2x2-6KfO嘉泰姆	CMKfO嘉泰姆	1KfO嘉泰姆	1KfO嘉泰姆	2.7KfO嘉泰姆	6KfO嘉泰姆	1500KfO嘉泰姆	0.6KfO嘉泰姆	280KfO嘉泰姆	250KfO嘉泰姆	25KfO嘉泰姆
CXSD62130AKfO嘉泰姆	TDFN2x2-6KfO嘉泰姆	CMKfO嘉泰姆	1KfO嘉泰姆	1KfO嘉泰姆	2.7KfO嘉泰姆	6KfO嘉泰姆	1500KfO嘉泰姆	0.6KfO嘉泰姆	280KfO嘉泰姆	250KfO嘉泰姆
CXSD62131KfO嘉泰姆	TDFN3x3-12KfO嘉泰姆	CMKfO嘉泰姆	2KfO嘉泰姆	1KfO嘉泰姆	2.7KfO嘉泰姆	6KfO嘉泰姆	1500KfO嘉泰姆	0.6KfO嘉泰姆	280KfO嘉泰姆	250KfO嘉泰姆	25KfO嘉泰姆
CXSD62131AKfO嘉泰姆	TDFN3x3-12KfO嘉泰姆	CMKfO嘉泰姆	2KfO嘉泰姆	1KfO嘉泰姆	2.7KfO嘉泰姆	6KfO嘉泰姆	1500KfO嘉泰姆	0.6KfO嘉泰姆	280KfO嘉泰姆	250KfO嘉泰姆
CXSD62131CKfO嘉泰姆	TDFN 3x3 12KfO嘉泰姆	CMKfO嘉泰姆	2KfO嘉泰姆	1KfO嘉泰姆	3KfO嘉泰姆	5.5KfO嘉泰姆	1500KfO嘉泰姆	0.6KfO嘉泰姆	280KfO嘉泰姆	250KfO嘉泰姆	30KfO嘉泰姆
CXSD62132KfO嘉泰姆	TQFN3x3-20KfO嘉泰姆	CMKfO嘉泰姆	3KfO嘉泰姆	2KfO嘉泰姆	2.9KfO嘉泰姆	5.5KfO嘉泰姆	1500KfO嘉泰姆	0.6KfO嘉泰姆	-KfO嘉泰姆	-KfO嘉泰姆	300KfO嘉泰姆
CXSD62133KfO嘉泰姆	TDFN2x2-8KfO嘉泰姆	CMKfO嘉泰姆	1KfO嘉泰姆	1KfO嘉泰姆	3.3KfO嘉泰姆	8KfO嘉泰姆	1500KfO嘉泰姆	0.6KfO嘉泰姆	280KfO嘉泰姆	250KfO嘉泰姆	25KfO嘉泰姆
CXSD62134KfO嘉泰姆	SOP-8KfO嘉泰姆	CMKfO嘉泰姆	1KfO嘉泰姆	2KfO嘉泰姆	4.5KfO嘉泰姆	24KfO嘉泰姆	340KfO嘉泰姆	0.925KfO嘉泰姆	110KfO嘉泰姆	110KfO嘉泰姆	1900KfO嘉泰姆
CXSD62135KfO嘉泰姆	SOP-8PKfO嘉泰姆	CMKfO嘉泰姆	1KfO嘉泰姆	3KfO嘉泰姆	4.5KfO嘉泰姆	24KfO嘉泰姆	340KfO嘉泰姆	0.925KfO嘉泰姆	110KfO嘉泰姆	110KfO嘉泰姆	1900KfO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

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