CXSD62147 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：181

CXSD62147 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ArI嘉泰姆
3.应用范围       4.下载产品资料PDF文档 ArI嘉泰姆
5.产品封装图                     6.电路原理图             ArI嘉泰姆
7.功能概述       8.相关产品ArI嘉泰姆

一,产品概述(General Description) ArI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.ArI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.ArI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.ArI嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.ArI嘉泰姆
二.产品特点(Features)ArI嘉泰姆
Wide Input Voltage from 4.5V to 24VArI嘉泰姆
3A Continuous Output CurrentArI嘉泰姆
Adjustable Output Voltage from 0.925V to 20VArI嘉泰姆
Intergrated High/Low Side MOSFETArI嘉泰姆
PFM/PWM mode OperationArI嘉泰姆
Fixed 340kHz Switching FrequencyArI嘉泰姆
Stable with Low ESR Ceramic Output CapacitorsArI嘉泰姆
Power-On-Reset DetectionArI嘉泰姆
Programmable Soft-StartArI嘉泰姆
Over-Temperature ProtectionArI嘉泰姆
Current-Limit Protection with Frequency FoldbackArI嘉泰姆
Enable/Shutdown FunctionArI嘉泰姆
Small SOP-8P PackageArI嘉泰姆
Lead Free and Green Devices AvailableArI嘉泰姆
(RoHS CompliantArI嘉泰姆
三,应用范围 (Applications)ArI嘉泰姆

LCD Monitor/TVArI嘉泰姆

Set-Top BoxArI嘉泰姆
DSL, Switch HUBArI嘉泰姆
Notebook ComputerArI嘉泰姆

四.下载产品资料PDF文档 ArI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！ArI嘉泰姆

QQ截图20160419174301.jpg ArI嘉泰姆

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五,产品封装图 (Package)ArI嘉泰姆

ArI嘉泰姆

六.电路原理图ArI嘉泰姆

ArI嘉泰姆

七,功能概述ArI嘉泰姆

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

Switching Regulator > Buck ConverterArI嘉泰姆
Part_No ArI嘉泰姆	PackageArI嘉泰姆	ArchitectuArI嘉泰姆	No.ofArI嘉泰姆 PWM ArI嘉泰姆 OutpuArI嘉泰姆	DriveArI嘉泰姆 LoutArI嘉泰姆 (A) ArI嘉泰姆	Vin(V) ArI嘉泰姆		FmaxArI嘉泰姆 Khz ArI嘉泰姆	Vref ArI嘉泰姆 (V) ArI嘉泰姆	R-Top (milohm) ArI嘉泰姆	R-Sync (milohm) ArI嘉泰姆	Iq (No load) (uA) ArI嘉泰姆
Part_No ArI嘉泰姆	PackageArI嘉泰姆	ArchitectuArI嘉泰姆	No.ofArI嘉泰姆 PWM ArI嘉泰姆 OutpuArI嘉泰姆	DriveArI嘉泰姆 LoutArI嘉泰姆 (A) ArI嘉泰姆	minArI嘉泰姆	maxArI嘉泰姆	FmaxArI嘉泰姆 Khz ArI嘉泰姆	Vref ArI嘉泰姆 (V) ArI嘉泰姆	R-Top (milohm) ArI嘉泰姆	R-Sync (milohm) ArI嘉泰姆	Iq (No load) (uA) ArI嘉泰姆
CXSD62122ArI嘉泰姆	TQFN5x6-28ArI嘉泰姆	CMArI嘉泰姆	1ArI嘉泰姆	5ArI嘉泰姆	4.5ArI嘉泰姆	26ArI嘉泰姆	380ArI嘉泰姆	0.8ArI嘉泰姆	50ArI嘉泰姆	20ArI嘉泰姆	1000ArI嘉泰姆
CXSD62123ArI嘉泰姆	SOP-8ArI嘉泰姆	CMArI嘉泰姆	1ArI嘉泰姆	2ArI嘉泰姆	4.5ArI嘉泰姆	26ArI嘉泰姆	380ArI嘉泰姆	0.8ArI嘉泰姆	100ArI嘉泰姆		1000ArI嘉泰姆
CXSD62124ArI嘉泰姆	SOP-8PArI嘉泰姆	CMArI嘉泰姆	1ArI嘉泰姆	4ArI嘉泰姆	4.5ArI嘉泰姆	26ArI嘉泰姆	380ArI嘉泰姆	0.8ArI嘉泰姆	80ArI嘉泰姆		1000ArI嘉泰姆
CXSD62125ArI嘉泰姆	SOT23-5\|TSOT23-5ArI嘉泰姆	CMArI嘉泰姆	1ArI嘉泰姆	1ArI嘉泰姆	2.7ArI嘉泰姆	6ArI嘉泰姆	1500ArI嘉泰姆	0.6ArI嘉泰姆	280ArI嘉泰姆	250ArI嘉泰姆	25ArI嘉泰姆
CXSD62125AArI嘉泰姆	SOT23-5ArI嘉泰姆	CMArI嘉泰姆	1ArI嘉泰姆	1ArI嘉泰姆	2.7ArI嘉泰姆	6ArI嘉泰姆	1500ArI嘉泰姆	0.6ArI嘉泰姆	280ArI嘉泰姆	250ArI嘉泰姆
CXSD62126ArI嘉泰姆	SOP-8ArI嘉泰姆	CMArI嘉泰姆	1ArI嘉泰姆	3ArI嘉泰姆	4.3ArI嘉泰姆	14ArI嘉泰姆	500ArI嘉泰姆	0.8ArI嘉泰姆	70ArI嘉泰姆	70ArI嘉泰姆	500ArI嘉泰姆
CXSD62127ArI嘉泰姆	SOP-8PArI嘉泰姆	CMArI嘉泰姆	1ArI嘉泰姆	3ArI嘉泰姆	4.3ArI嘉泰姆	14ArI嘉泰姆	500ArI嘉泰姆	0.8ArI嘉泰姆	55ArI嘉泰姆	45ArI嘉泰姆	500ArI嘉泰姆
CXSD62128BArI嘉泰姆	TDFN3x3-10ArI嘉泰姆			3ArI嘉泰姆	2.6ArI嘉泰姆	5.5ArI嘉泰姆	2000ArI嘉泰姆	0.8ArI嘉泰姆	110ArI嘉泰姆	110ArI嘉泰姆	460ArI嘉泰姆
CXSD62129ArI嘉泰姆	TDFN3x3-10ArI嘉泰姆	CMArI嘉泰姆	2ArI嘉泰姆	1ArI嘉泰姆	2.7ArI嘉泰姆	6ArI嘉泰姆	1500ArI嘉泰姆	0.6ArI嘉泰姆	280ArI嘉泰姆	250ArI嘉泰姆	500ArI嘉泰姆
CXSD62129AArI嘉泰姆	TDFN3x3-10ArI嘉泰姆	CMArI嘉泰姆	2ArI嘉泰姆	1ArI嘉泰姆	2.7ArI嘉泰姆	6ArI嘉泰姆	1500ArI嘉泰姆	0.6ArI嘉泰姆	280ArI嘉泰姆	250ArI嘉泰姆
CXSD62130ArI嘉泰姆	TDFN2x2-6ArI嘉泰姆	CMArI嘉泰姆	1ArI嘉泰姆	1ArI嘉泰姆	2.7ArI嘉泰姆	6ArI嘉泰姆	1500ArI嘉泰姆	0.6ArI嘉泰姆	280ArI嘉泰姆	250ArI嘉泰姆	25ArI嘉泰姆
CXSD62130AArI嘉泰姆	TDFN2x2-6ArI嘉泰姆	CMArI嘉泰姆	1ArI嘉泰姆	1ArI嘉泰姆	2.7ArI嘉泰姆	6ArI嘉泰姆	1500ArI嘉泰姆	0.6ArI嘉泰姆	280ArI嘉泰姆	250ArI嘉泰姆
CXSD62131ArI嘉泰姆	TDFN3x3-12ArI嘉泰姆	CMArI嘉泰姆	2ArI嘉泰姆	1ArI嘉泰姆	2.7ArI嘉泰姆	6ArI嘉泰姆	1500ArI嘉泰姆	0.6ArI嘉泰姆	280ArI嘉泰姆	250ArI嘉泰姆	25ArI嘉泰姆
CXSD62131AArI嘉泰姆	TDFN3x3-12ArI嘉泰姆	CMArI嘉泰姆	2ArI嘉泰姆	1ArI嘉泰姆	2.7ArI嘉泰姆	6ArI嘉泰姆	1500ArI嘉泰姆	0.6ArI嘉泰姆	280ArI嘉泰姆	250ArI嘉泰姆
CXSD62131CArI嘉泰姆	TDFN 3x3 12ArI嘉泰姆	CMArI嘉泰姆	2ArI嘉泰姆	1ArI嘉泰姆	3ArI嘉泰姆	5.5ArI嘉泰姆	1500ArI嘉泰姆	0.6ArI嘉泰姆	280ArI嘉泰姆	250ArI嘉泰姆	30ArI嘉泰姆
CXSD62132ArI嘉泰姆	TQFN3x3-20ArI嘉泰姆	CMArI嘉泰姆	3ArI嘉泰姆	2ArI嘉泰姆	2.9ArI嘉泰姆	5.5ArI嘉泰姆	1500ArI嘉泰姆	0.6ArI嘉泰姆	-ArI嘉泰姆	-ArI嘉泰姆	300ArI嘉泰姆
CXSD62133ArI嘉泰姆	TDFN2x2-8ArI嘉泰姆	CMArI嘉泰姆	1ArI嘉泰姆	1ArI嘉泰姆	3.3ArI嘉泰姆	8ArI嘉泰姆	1500ArI嘉泰姆	0.6ArI嘉泰姆	280ArI嘉泰姆	250ArI嘉泰姆	25ArI嘉泰姆
CXSD62134ArI嘉泰姆	SOP-8ArI嘉泰姆	CMArI嘉泰姆	1ArI嘉泰姆	2ArI嘉泰姆	4.5ArI嘉泰姆	24ArI嘉泰姆	340ArI嘉泰姆	0.925ArI嘉泰姆	110ArI嘉泰姆	110ArI嘉泰姆	1900ArI嘉泰姆
CXSD62135ArI嘉泰姆	SOP-8PArI嘉泰姆	CMArI嘉泰姆	1ArI嘉泰姆	3ArI嘉泰姆	4.5ArI嘉泰姆	24ArI嘉泰姆	340ArI嘉泰姆	0.925ArI嘉泰姆	110ArI嘉泰姆	110ArI嘉泰姆	1900ArI嘉泰姆

上一篇：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

下一篇：2.5A连续输出电流CXSD62148 固定500kHz开关频率可调输出电压0.807V至13V HICCUP模式的限流保护

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