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：60

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

一,产品概述(General Description) uJE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.uJE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.uJE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.uJE嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.uJE嘉泰姆
二.产品特点(Features)uJE嘉泰姆
Wide Input Voltage from 4.5V to 24VuJE嘉泰姆
3A Continuous Output CurrentuJE嘉泰姆
Adjustable Output Voltage from 0.925V to 20VuJE嘉泰姆
Intergrated High/Low Side MOSFETuJE嘉泰姆
PFM/PWM mode OperationuJE嘉泰姆
Fixed 340kHz Switching FrequencyuJE嘉泰姆
Stable with Low ESR Ceramic Output CapacitorsuJE嘉泰姆
Power-On-Reset DetectionuJE嘉泰姆
Programmable Soft-StartuJE嘉泰姆
Over-Temperature ProtectionuJE嘉泰姆
Current-Limit Protection with Frequency FoldbackuJE嘉泰姆
Enable/Shutdown FunctionuJE嘉泰姆
Small SOP-8P PackageuJE嘉泰姆
Lead Free and Green Devices AvailableuJE嘉泰姆
(RoHS CompliantuJE嘉泰姆
三,应用范围 (Applications)uJE嘉泰姆

LCD Monitor/TVuJE嘉泰姆

Set-Top BoxuJE嘉泰姆
DSL, Switch HUBuJE嘉泰姆
Notebook ComputeruJE嘉泰姆

四.下载产品资料PDF文档 uJE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！uJE嘉泰姆

QQ截图20160419174301.jpg uJE嘉泰姆

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五,产品封装图 (Package)uJE嘉泰姆

uJE嘉泰姆

六.电路原理图uJE嘉泰姆

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七,功能概述uJE嘉泰姆

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

Switching Regulator > Buck ConverteruJE嘉泰姆
Part_No uJE嘉泰姆	PackageuJE嘉泰姆	ArchitectuuJE嘉泰姆	No.ofuJE嘉泰姆 PWM uJE嘉泰姆 OutpuuJE嘉泰姆	DriveuJE嘉泰姆 LoutuJE嘉泰姆 (A) uJE嘉泰姆	Vin(V) uJE嘉泰姆		FmaxuJE嘉泰姆 Khz uJE嘉泰姆	Vref uJE嘉泰姆 (V) uJE嘉泰姆	R-Top (milohm) uJE嘉泰姆	R-Sync (milohm) uJE嘉泰姆	Iq (No load) (uA) uJE嘉泰姆
Part_No uJE嘉泰姆	PackageuJE嘉泰姆	ArchitectuuJE嘉泰姆	No.ofuJE嘉泰姆 PWM uJE嘉泰姆 OutpuuJE嘉泰姆	DriveuJE嘉泰姆 LoutuJE嘉泰姆 (A) uJE嘉泰姆	minuJE嘉泰姆	maxuJE嘉泰姆	FmaxuJE嘉泰姆 Khz uJE嘉泰姆	Vref uJE嘉泰姆 (V) uJE嘉泰姆	R-Top (milohm) uJE嘉泰姆	R-Sync (milohm) uJE嘉泰姆	Iq (No load) (uA) uJE嘉泰姆
CXSD62122uJE嘉泰姆	TQFN5x6-28uJE嘉泰姆	CMuJE嘉泰姆	1uJE嘉泰姆	5uJE嘉泰姆	4.5uJE嘉泰姆	26uJE嘉泰姆	380uJE嘉泰姆	0.8uJE嘉泰姆	50uJE嘉泰姆	20uJE嘉泰姆	1000uJE嘉泰姆
CXSD62123uJE嘉泰姆	SOP-8uJE嘉泰姆	CMuJE嘉泰姆	1uJE嘉泰姆	2uJE嘉泰姆	4.5uJE嘉泰姆	26uJE嘉泰姆	380uJE嘉泰姆	0.8uJE嘉泰姆	100uJE嘉泰姆		1000uJE嘉泰姆
CXSD62124uJE嘉泰姆	SOP-8PuJE嘉泰姆	CMuJE嘉泰姆	1uJE嘉泰姆	4uJE嘉泰姆	4.5uJE嘉泰姆	26uJE嘉泰姆	380uJE嘉泰姆	0.8uJE嘉泰姆	80uJE嘉泰姆		1000uJE嘉泰姆
CXSD62125uJE嘉泰姆	SOT23-5\|TSOT23-5uJE嘉泰姆	CMuJE嘉泰姆	1uJE嘉泰姆	1uJE嘉泰姆	2.7uJE嘉泰姆	6uJE嘉泰姆	1500uJE嘉泰姆	0.6uJE嘉泰姆	280uJE嘉泰姆	250uJE嘉泰姆	25uJE嘉泰姆
CXSD62125AuJE嘉泰姆	SOT23-5uJE嘉泰姆	CMuJE嘉泰姆	1uJE嘉泰姆	1uJE嘉泰姆	2.7uJE嘉泰姆	6uJE嘉泰姆	1500uJE嘉泰姆	0.6uJE嘉泰姆	280uJE嘉泰姆	250uJE嘉泰姆
CXSD62126uJE嘉泰姆	SOP-8uJE嘉泰姆	CMuJE嘉泰姆	1uJE嘉泰姆	3uJE嘉泰姆	4.3uJE嘉泰姆	14uJE嘉泰姆	500uJE嘉泰姆	0.8uJE嘉泰姆	70uJE嘉泰姆	70uJE嘉泰姆	500uJE嘉泰姆
CXSD62127uJE嘉泰姆	SOP-8PuJE嘉泰姆	CMuJE嘉泰姆	1uJE嘉泰姆	3uJE嘉泰姆	4.3uJE嘉泰姆	14uJE嘉泰姆	500uJE嘉泰姆	0.8uJE嘉泰姆	55uJE嘉泰姆	45uJE嘉泰姆	500uJE嘉泰姆
CXSD62128BuJE嘉泰姆	TDFN3x3-10uJE嘉泰姆			3uJE嘉泰姆	2.6uJE嘉泰姆	5.5uJE嘉泰姆	2000uJE嘉泰姆	0.8uJE嘉泰姆	110uJE嘉泰姆	110uJE嘉泰姆	460uJE嘉泰姆
CXSD62129uJE嘉泰姆	TDFN3x3-10uJE嘉泰姆	CMuJE嘉泰姆	2uJE嘉泰姆	1uJE嘉泰姆	2.7uJE嘉泰姆	6uJE嘉泰姆	1500uJE嘉泰姆	0.6uJE嘉泰姆	280uJE嘉泰姆	250uJE嘉泰姆	500uJE嘉泰姆
CXSD62129AuJE嘉泰姆	TDFN3x3-10uJE嘉泰姆	CMuJE嘉泰姆	2uJE嘉泰姆	1uJE嘉泰姆	2.7uJE嘉泰姆	6uJE嘉泰姆	1500uJE嘉泰姆	0.6uJE嘉泰姆	280uJE嘉泰姆	250uJE嘉泰姆
CXSD62130uJE嘉泰姆	TDFN2x2-6uJE嘉泰姆	CMuJE嘉泰姆	1uJE嘉泰姆	1uJE嘉泰姆	2.7uJE嘉泰姆	6uJE嘉泰姆	1500uJE嘉泰姆	0.6uJE嘉泰姆	280uJE嘉泰姆	250uJE嘉泰姆	25uJE嘉泰姆
CXSD62130AuJE嘉泰姆	TDFN2x2-6uJE嘉泰姆	CMuJE嘉泰姆	1uJE嘉泰姆	1uJE嘉泰姆	2.7uJE嘉泰姆	6uJE嘉泰姆	1500uJE嘉泰姆	0.6uJE嘉泰姆	280uJE嘉泰姆	250uJE嘉泰姆
CXSD62131uJE嘉泰姆	TDFN3x3-12uJE嘉泰姆	CMuJE嘉泰姆	2uJE嘉泰姆	1uJE嘉泰姆	2.7uJE嘉泰姆	6uJE嘉泰姆	1500uJE嘉泰姆	0.6uJE嘉泰姆	280uJE嘉泰姆	250uJE嘉泰姆	25uJE嘉泰姆
CXSD62131AuJE嘉泰姆	TDFN3x3-12uJE嘉泰姆	CMuJE嘉泰姆	2uJE嘉泰姆	1uJE嘉泰姆	2.7uJE嘉泰姆	6uJE嘉泰姆	1500uJE嘉泰姆	0.6uJE嘉泰姆	280uJE嘉泰姆	250uJE嘉泰姆
CXSD62131CuJE嘉泰姆	TDFN 3x3 12uJE嘉泰姆	CMuJE嘉泰姆	2uJE嘉泰姆	1uJE嘉泰姆	3uJE嘉泰姆	5.5uJE嘉泰姆	1500uJE嘉泰姆	0.6uJE嘉泰姆	280uJE嘉泰姆	250uJE嘉泰姆	30uJE嘉泰姆
CXSD62132uJE嘉泰姆	TQFN3x3-20uJE嘉泰姆	CMuJE嘉泰姆	3uJE嘉泰姆	2uJE嘉泰姆	2.9uJE嘉泰姆	5.5uJE嘉泰姆	1500uJE嘉泰姆	0.6uJE嘉泰姆	-uJE嘉泰姆	-uJE嘉泰姆	300uJE嘉泰姆
CXSD62133uJE嘉泰姆	TDFN2x2-8uJE嘉泰姆	CMuJE嘉泰姆	1uJE嘉泰姆	1uJE嘉泰姆	3.3uJE嘉泰姆	8uJE嘉泰姆	1500uJE嘉泰姆	0.6uJE嘉泰姆	280uJE嘉泰姆	250uJE嘉泰姆	25uJE嘉泰姆
CXSD62134uJE嘉泰姆	SOP-8uJE嘉泰姆	CMuJE嘉泰姆	1uJE嘉泰姆	2uJE嘉泰姆	4.5uJE嘉泰姆	24uJE嘉泰姆	340uJE嘉泰姆	0.925uJE嘉泰姆	110uJE嘉泰姆	110uJE嘉泰姆	1900uJE嘉泰姆
CXSD62135uJE嘉泰姆	SOP-8PuJE嘉泰姆	CMuJE嘉泰姆	1uJE嘉泰姆	3uJE嘉泰姆	4.5uJE嘉泰姆	24uJE嘉泰姆	340uJE嘉泰姆	0.925uJE嘉泰姆	110uJE嘉泰姆	110uJE嘉泰姆	1900uJE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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