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

首页 > 新闻中心 > 行业新闻

发表时间：2020-04-28浏览次数：78

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

1.产品概述         2.产品特点fOl嘉泰姆
3.应用范围       4.下载产品资料PDF文档 fOl嘉泰姆
5.产品封装图                     6.电路原理图             fOl嘉泰姆
7.功能概述       8.相关产品fOl嘉泰姆

一,产品概述(General Description) fOl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.fOl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.fOl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.fOl嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.fOl嘉泰姆
二.产品特点(Features)fOl嘉泰姆
Wide Input Voltage from 4.5V to 24VfOl嘉泰姆
3A Continuous Output CurrentfOl嘉泰姆
Adjustable Output Voltage from 0.925V to 20VfOl嘉泰姆
Intergrated High/Low Side MOSFETfOl嘉泰姆
PFM/PWM mode OperationfOl嘉泰姆
Fixed 340kHz Switching FrequencyfOl嘉泰姆
Stable with Low ESR Ceramic Output CapacitorsfOl嘉泰姆
Power-On-Reset DetectionfOl嘉泰姆
Programmable Soft-StartfOl嘉泰姆
Over-Temperature ProtectionfOl嘉泰姆
Current-Limit Protection with Frequency FoldbackfOl嘉泰姆
Enable/Shutdown FunctionfOl嘉泰姆
Small SOP-8P PackagefOl嘉泰姆
Lead Free and Green Devices AvailablefOl嘉泰姆
(RoHS CompliantfOl嘉泰姆
三,应用范围 (Applications)fOl嘉泰姆

LCD Monitor/TVfOl嘉泰姆

Set-Top BoxfOl嘉泰姆
DSL, Switch HUBfOl嘉泰姆
Notebook ComputerfOl嘉泰姆

四.下载产品资料PDF文档 fOl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！fOl嘉泰姆

QQ截图20160419174301.jpg fOl嘉泰姆

fOl嘉泰姆

五,产品封装图 (Package)fOl嘉泰姆

fOl嘉泰姆

六.电路原理图fOl嘉泰姆

fOl嘉泰姆

七,功能概述fOl嘉泰姆

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

Switching Regulator > Buck ConverterfOl嘉泰姆
Part_No fOl嘉泰姆	PackagefOl嘉泰姆	ArchitectufOl嘉泰姆	No.offOl嘉泰姆 PWM fOl嘉泰姆 OutpufOl嘉泰姆	DrivefOl嘉泰姆 LoutfOl嘉泰姆 (A) fOl嘉泰姆	Vin(V) fOl嘉泰姆		FmaxfOl嘉泰姆 Khz fOl嘉泰姆	Vref fOl嘉泰姆 (V) fOl嘉泰姆	R-Top (milohm) fOl嘉泰姆	R-Sync (milohm) fOl嘉泰姆	Iq (No load) (uA) fOl嘉泰姆
Part_No fOl嘉泰姆	PackagefOl嘉泰姆	ArchitectufOl嘉泰姆	No.offOl嘉泰姆 PWM fOl嘉泰姆 OutpufOl嘉泰姆	DrivefOl嘉泰姆 LoutfOl嘉泰姆 (A) fOl嘉泰姆	minfOl嘉泰姆	maxfOl嘉泰姆	FmaxfOl嘉泰姆 Khz fOl嘉泰姆	Vref fOl嘉泰姆 (V) fOl嘉泰姆	R-Top (milohm) fOl嘉泰姆	R-Sync (milohm) fOl嘉泰姆	Iq (No load) (uA) fOl嘉泰姆
CXSD62122fOl嘉泰姆	TQFN5x6-28fOl嘉泰姆	CMfOl嘉泰姆	1fOl嘉泰姆	5fOl嘉泰姆	4.5fOl嘉泰姆	26fOl嘉泰姆	380fOl嘉泰姆	0.8fOl嘉泰姆	50fOl嘉泰姆	20fOl嘉泰姆	1000fOl嘉泰姆
CXSD62123fOl嘉泰姆	SOP-8fOl嘉泰姆	CMfOl嘉泰姆	1fOl嘉泰姆	2fOl嘉泰姆	4.5fOl嘉泰姆	26fOl嘉泰姆	380fOl嘉泰姆	0.8fOl嘉泰姆	100fOl嘉泰姆		1000fOl嘉泰姆
CXSD62124fOl嘉泰姆	SOP-8PfOl嘉泰姆	CMfOl嘉泰姆	1fOl嘉泰姆	4fOl嘉泰姆	4.5fOl嘉泰姆	26fOl嘉泰姆	380fOl嘉泰姆	0.8fOl嘉泰姆	80fOl嘉泰姆		1000fOl嘉泰姆
CXSD62125fOl嘉泰姆	SOT23-5\|TSOT23-5fOl嘉泰姆	CMfOl嘉泰姆	1fOl嘉泰姆	1fOl嘉泰姆	2.7fOl嘉泰姆	6fOl嘉泰姆	1500fOl嘉泰姆	0.6fOl嘉泰姆	280fOl嘉泰姆	250fOl嘉泰姆	25fOl嘉泰姆
CXSD62125AfOl嘉泰姆	SOT23-5fOl嘉泰姆	CMfOl嘉泰姆	1fOl嘉泰姆	1fOl嘉泰姆	2.7fOl嘉泰姆	6fOl嘉泰姆	1500fOl嘉泰姆	0.6fOl嘉泰姆	280fOl嘉泰姆	250fOl嘉泰姆
CXSD62126fOl嘉泰姆	SOP-8fOl嘉泰姆	CMfOl嘉泰姆	1fOl嘉泰姆	3fOl嘉泰姆	4.3fOl嘉泰姆	14fOl嘉泰姆	500fOl嘉泰姆	0.8fOl嘉泰姆	70fOl嘉泰姆	70fOl嘉泰姆	500fOl嘉泰姆
CXSD62127fOl嘉泰姆	SOP-8PfOl嘉泰姆	CMfOl嘉泰姆	1fOl嘉泰姆	3fOl嘉泰姆	4.3fOl嘉泰姆	14fOl嘉泰姆	500fOl嘉泰姆	0.8fOl嘉泰姆	55fOl嘉泰姆	45fOl嘉泰姆	500fOl嘉泰姆
CXSD62128BfOl嘉泰姆	TDFN3x3-10fOl嘉泰姆			3fOl嘉泰姆	2.6fOl嘉泰姆	5.5fOl嘉泰姆	2000fOl嘉泰姆	0.8fOl嘉泰姆	110fOl嘉泰姆	110fOl嘉泰姆	460fOl嘉泰姆
CXSD62129fOl嘉泰姆	TDFN3x3-10fOl嘉泰姆	CMfOl嘉泰姆	2fOl嘉泰姆	1fOl嘉泰姆	2.7fOl嘉泰姆	6fOl嘉泰姆	1500fOl嘉泰姆	0.6fOl嘉泰姆	280fOl嘉泰姆	250fOl嘉泰姆	500fOl嘉泰姆
CXSD62129AfOl嘉泰姆	TDFN3x3-10fOl嘉泰姆	CMfOl嘉泰姆	2fOl嘉泰姆	1fOl嘉泰姆	2.7fOl嘉泰姆	6fOl嘉泰姆	1500fOl嘉泰姆	0.6fOl嘉泰姆	280fOl嘉泰姆	250fOl嘉泰姆
CXSD62130fOl嘉泰姆	TDFN2x2-6fOl嘉泰姆	CMfOl嘉泰姆	1fOl嘉泰姆	1fOl嘉泰姆	2.7fOl嘉泰姆	6fOl嘉泰姆	1500fOl嘉泰姆	0.6fOl嘉泰姆	280fOl嘉泰姆	250fOl嘉泰姆	25fOl嘉泰姆
CXSD62130AfOl嘉泰姆	TDFN2x2-6fOl嘉泰姆	CMfOl嘉泰姆	1fOl嘉泰姆	1fOl嘉泰姆	2.7fOl嘉泰姆	6fOl嘉泰姆	1500fOl嘉泰姆	0.6fOl嘉泰姆	280fOl嘉泰姆	250fOl嘉泰姆
CXSD62131fOl嘉泰姆	TDFN3x3-12fOl嘉泰姆	CMfOl嘉泰姆	2fOl嘉泰姆	1fOl嘉泰姆	2.7fOl嘉泰姆	6fOl嘉泰姆	1500fOl嘉泰姆	0.6fOl嘉泰姆	280fOl嘉泰姆	250fOl嘉泰姆	25fOl嘉泰姆
CXSD62131AfOl嘉泰姆	TDFN3x3-12fOl嘉泰姆	CMfOl嘉泰姆	2fOl嘉泰姆	1fOl嘉泰姆	2.7fOl嘉泰姆	6fOl嘉泰姆	1500fOl嘉泰姆	0.6fOl嘉泰姆	280fOl嘉泰姆	250fOl嘉泰姆
CXSD62131CfOl嘉泰姆	TDFN 3x3 12fOl嘉泰姆	CMfOl嘉泰姆	2fOl嘉泰姆	1fOl嘉泰姆	3fOl嘉泰姆	5.5fOl嘉泰姆	1500fOl嘉泰姆	0.6fOl嘉泰姆	280fOl嘉泰姆	250fOl嘉泰姆	30fOl嘉泰姆
CXSD62132fOl嘉泰姆	TQFN3x3-20fOl嘉泰姆	CMfOl嘉泰姆	3fOl嘉泰姆	2fOl嘉泰姆	2.9fOl嘉泰姆	5.5fOl嘉泰姆	1500fOl嘉泰姆	0.6fOl嘉泰姆	-fOl嘉泰姆	-fOl嘉泰姆	300fOl嘉泰姆
CXSD62133fOl嘉泰姆	TDFN2x2-8fOl嘉泰姆	CMfOl嘉泰姆	1fOl嘉泰姆	1fOl嘉泰姆	3.3fOl嘉泰姆	8fOl嘉泰姆	1500fOl嘉泰姆	0.6fOl嘉泰姆	280fOl嘉泰姆	250fOl嘉泰姆	25fOl嘉泰姆
CXSD62134fOl嘉泰姆	SOP-8fOl嘉泰姆	CMfOl嘉泰姆	1fOl嘉泰姆	2fOl嘉泰姆	4.5fOl嘉泰姆	24fOl嘉泰姆	340fOl嘉泰姆	0.925fOl嘉泰姆	110fOl嘉泰姆	110fOl嘉泰姆	1900fOl嘉泰姆
CXSD62135fOl嘉泰姆	SOP-8PfOl嘉泰姆	CMfOl嘉泰姆	1fOl嘉泰姆	3fOl嘉泰姆	4.5fOl嘉泰姆	24fOl嘉泰姆	340fOl嘉泰姆	0.925fOl嘉泰姆	110fOl嘉泰姆	110fOl嘉泰姆	1900fOl嘉泰姆

上一篇：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

下一篇：CXSD62147 PFM/PWM模式操作固定340kHz开关频率低ESR陶瓷输出电容稳定

发表评论

产品中心

电源管理

LED驱动电路

音频放大IC

电机风扇驱动芯片

MCU存储ADC时钟数据线

功率器件

隔离芯片

电池充电芯片

技术支持

产品方案

质量承诺

联系我们