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：299

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

一,产品概述(General Description) KQU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.KQU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.KQU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.KQU嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.KQU嘉泰姆
二.产品特点(Features)KQU嘉泰姆
Wide Input Voltage from 4.5V to 24VKQU嘉泰姆
3A Continuous Output CurrentKQU嘉泰姆
Adjustable Output Voltage from 0.925V to 20VKQU嘉泰姆
Intergrated High/Low Side MOSFETKQU嘉泰姆
PFM/PWM mode OperationKQU嘉泰姆
Fixed 340kHz Switching FrequencyKQU嘉泰姆
Stable with Low ESR Ceramic Output CapacitorsKQU嘉泰姆
Power-On-Reset DetectionKQU嘉泰姆
Programmable Soft-StartKQU嘉泰姆
Over-Temperature ProtectionKQU嘉泰姆
Current-Limit Protection with Frequency FoldbackKQU嘉泰姆
Enable/Shutdown FunctionKQU嘉泰姆
Small SOP-8P PackageKQU嘉泰姆
Lead Free and Green Devices AvailableKQU嘉泰姆
(RoHS CompliantKQU嘉泰姆
三,应用范围 (Applications)KQU嘉泰姆

LCD Monitor/TVKQU嘉泰姆

Set-Top BoxKQU嘉泰姆
DSL, Switch HUBKQU嘉泰姆
Notebook ComputerKQU嘉泰姆

四.下载产品资料PDF文档 KQU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！KQU嘉泰姆

QQ截图20160419174301.jpg KQU嘉泰姆

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五,产品封装图 (Package)KQU嘉泰姆

KQU嘉泰姆

六.电路原理图KQU嘉泰姆

KQU嘉泰姆

七,功能概述KQU嘉泰姆

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

Switching Regulator > Buck ConverterKQU嘉泰姆
Part_No KQU嘉泰姆	PackageKQU嘉泰姆	ArchitectuKQU嘉泰姆	No.ofKQU嘉泰姆 PWM KQU嘉泰姆 OutpuKQU嘉泰姆	DriveKQU嘉泰姆 LoutKQU嘉泰姆 (A) KQU嘉泰姆	Vin(V) KQU嘉泰姆		FmaxKQU嘉泰姆 Khz KQU嘉泰姆	Vref KQU嘉泰姆 (V) KQU嘉泰姆	R-Top (milohm) KQU嘉泰姆	R-Sync (milohm) KQU嘉泰姆	Iq (No load) (uA) KQU嘉泰姆
Part_No KQU嘉泰姆	PackageKQU嘉泰姆	ArchitectuKQU嘉泰姆	No.ofKQU嘉泰姆 PWM KQU嘉泰姆 OutpuKQU嘉泰姆	DriveKQU嘉泰姆 LoutKQU嘉泰姆 (A) KQU嘉泰姆	minKQU嘉泰姆	maxKQU嘉泰姆	FmaxKQU嘉泰姆 Khz KQU嘉泰姆	Vref KQU嘉泰姆 (V) KQU嘉泰姆	R-Top (milohm) KQU嘉泰姆	R-Sync (milohm) KQU嘉泰姆	Iq (No load) (uA) KQU嘉泰姆
CXSD62122KQU嘉泰姆	TQFN5x6-28KQU嘉泰姆	CMKQU嘉泰姆	1KQU嘉泰姆	5KQU嘉泰姆	4.5KQU嘉泰姆	26KQU嘉泰姆	380KQU嘉泰姆	0.8KQU嘉泰姆	50KQU嘉泰姆	20KQU嘉泰姆	1000KQU嘉泰姆
CXSD62123KQU嘉泰姆	SOP-8KQU嘉泰姆	CMKQU嘉泰姆	1KQU嘉泰姆	2KQU嘉泰姆	4.5KQU嘉泰姆	26KQU嘉泰姆	380KQU嘉泰姆	0.8KQU嘉泰姆	100KQU嘉泰姆		1000KQU嘉泰姆
CXSD62124KQU嘉泰姆	SOP-8PKQU嘉泰姆	CMKQU嘉泰姆	1KQU嘉泰姆	4KQU嘉泰姆	4.5KQU嘉泰姆	26KQU嘉泰姆	380KQU嘉泰姆	0.8KQU嘉泰姆	80KQU嘉泰姆		1000KQU嘉泰姆
CXSD62125KQU嘉泰姆	SOT23-5\|TSOT23-5KQU嘉泰姆	CMKQU嘉泰姆	1KQU嘉泰姆	1KQU嘉泰姆	2.7KQU嘉泰姆	6KQU嘉泰姆	1500KQU嘉泰姆	0.6KQU嘉泰姆	280KQU嘉泰姆	250KQU嘉泰姆	25KQU嘉泰姆
CXSD62125AKQU嘉泰姆	SOT23-5KQU嘉泰姆	CMKQU嘉泰姆	1KQU嘉泰姆	1KQU嘉泰姆	2.7KQU嘉泰姆	6KQU嘉泰姆	1500KQU嘉泰姆	0.6KQU嘉泰姆	280KQU嘉泰姆	250KQU嘉泰姆
CXSD62126KQU嘉泰姆	SOP-8KQU嘉泰姆	CMKQU嘉泰姆	1KQU嘉泰姆	3KQU嘉泰姆	4.3KQU嘉泰姆	14KQU嘉泰姆	500KQU嘉泰姆	0.8KQU嘉泰姆	70KQU嘉泰姆	70KQU嘉泰姆	500KQU嘉泰姆
CXSD62127KQU嘉泰姆	SOP-8PKQU嘉泰姆	CMKQU嘉泰姆	1KQU嘉泰姆	3KQU嘉泰姆	4.3KQU嘉泰姆	14KQU嘉泰姆	500KQU嘉泰姆	0.8KQU嘉泰姆	55KQU嘉泰姆	45KQU嘉泰姆	500KQU嘉泰姆
CXSD62128BKQU嘉泰姆	TDFN3x3-10KQU嘉泰姆			3KQU嘉泰姆	2.6KQU嘉泰姆	5.5KQU嘉泰姆	2000KQU嘉泰姆	0.8KQU嘉泰姆	110KQU嘉泰姆	110KQU嘉泰姆	460KQU嘉泰姆
CXSD62129KQU嘉泰姆	TDFN3x3-10KQU嘉泰姆	CMKQU嘉泰姆	2KQU嘉泰姆	1KQU嘉泰姆	2.7KQU嘉泰姆	6KQU嘉泰姆	1500KQU嘉泰姆	0.6KQU嘉泰姆	280KQU嘉泰姆	250KQU嘉泰姆	500KQU嘉泰姆
CXSD62129AKQU嘉泰姆	TDFN3x3-10KQU嘉泰姆	CMKQU嘉泰姆	2KQU嘉泰姆	1KQU嘉泰姆	2.7KQU嘉泰姆	6KQU嘉泰姆	1500KQU嘉泰姆	0.6KQU嘉泰姆	280KQU嘉泰姆	250KQU嘉泰姆
CXSD62130KQU嘉泰姆	TDFN2x2-6KQU嘉泰姆	CMKQU嘉泰姆	1KQU嘉泰姆	1KQU嘉泰姆	2.7KQU嘉泰姆	6KQU嘉泰姆	1500KQU嘉泰姆	0.6KQU嘉泰姆	280KQU嘉泰姆	250KQU嘉泰姆	25KQU嘉泰姆
CXSD62130AKQU嘉泰姆	TDFN2x2-6KQU嘉泰姆	CMKQU嘉泰姆	1KQU嘉泰姆	1KQU嘉泰姆	2.7KQU嘉泰姆	6KQU嘉泰姆	1500KQU嘉泰姆	0.6KQU嘉泰姆	280KQU嘉泰姆	250KQU嘉泰姆
CXSD62131KQU嘉泰姆	TDFN3x3-12KQU嘉泰姆	CMKQU嘉泰姆	2KQU嘉泰姆	1KQU嘉泰姆	2.7KQU嘉泰姆	6KQU嘉泰姆	1500KQU嘉泰姆	0.6KQU嘉泰姆	280KQU嘉泰姆	250KQU嘉泰姆	25KQU嘉泰姆
CXSD62131AKQU嘉泰姆	TDFN3x3-12KQU嘉泰姆	CMKQU嘉泰姆	2KQU嘉泰姆	1KQU嘉泰姆	2.7KQU嘉泰姆	6KQU嘉泰姆	1500KQU嘉泰姆	0.6KQU嘉泰姆	280KQU嘉泰姆	250KQU嘉泰姆
CXSD62131CKQU嘉泰姆	TDFN 3x3 12KQU嘉泰姆	CMKQU嘉泰姆	2KQU嘉泰姆	1KQU嘉泰姆	3KQU嘉泰姆	5.5KQU嘉泰姆	1500KQU嘉泰姆	0.6KQU嘉泰姆	280KQU嘉泰姆	250KQU嘉泰姆	30KQU嘉泰姆
CXSD62132KQU嘉泰姆	TQFN3x3-20KQU嘉泰姆	CMKQU嘉泰姆	3KQU嘉泰姆	2KQU嘉泰姆	2.9KQU嘉泰姆	5.5KQU嘉泰姆	1500KQU嘉泰姆	0.6KQU嘉泰姆	-KQU嘉泰姆	-KQU嘉泰姆	300KQU嘉泰姆
CXSD62133KQU嘉泰姆	TDFN2x2-8KQU嘉泰姆	CMKQU嘉泰姆	1KQU嘉泰姆	1KQU嘉泰姆	3.3KQU嘉泰姆	8KQU嘉泰姆	1500KQU嘉泰姆	0.6KQU嘉泰姆	280KQU嘉泰姆	250KQU嘉泰姆	25KQU嘉泰姆
CXSD62134KQU嘉泰姆	SOP-8KQU嘉泰姆	CMKQU嘉泰姆	1KQU嘉泰姆	2KQU嘉泰姆	4.5KQU嘉泰姆	24KQU嘉泰姆	340KQU嘉泰姆	0.925KQU嘉泰姆	110KQU嘉泰姆	110KQU嘉泰姆	1900KQU嘉泰姆
CXSD62135KQU嘉泰姆	SOP-8PKQU嘉泰姆	CMKQU嘉泰姆	1KQU嘉泰姆	3KQU嘉泰姆	4.5KQU嘉泰姆	24KQU嘉泰姆	340KQU嘉泰姆	0.925KQU嘉泰姆	110KQU嘉泰姆	110KQU嘉泰姆	1900KQU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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