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

首页 > 新闻中心 > 行业新闻

发表时间：2020-04-28浏览次数：76

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

一,产品概述(General Description) jnp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.jnp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.jnp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.jnp嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.jnp嘉泰姆
二.产品特点(Features)jnp嘉泰姆
Wide Input Voltage from 4.5V to 24Vjnp嘉泰姆
3A Continuous Output Currentjnp嘉泰姆
Adjustable Output Voltage from 0.925V to 20Vjnp嘉泰姆
Intergrated High/Low Side MOSFETjnp嘉泰姆
PFM/PWM mode Operationjnp嘉泰姆
Fixed 340kHz Switching Frequencyjnp嘉泰姆
Stable with Low ESR Ceramic Output Capacitorsjnp嘉泰姆
Power-On-Reset Detectionjnp嘉泰姆
Programmable Soft-Startjnp嘉泰姆
Over-Temperature Protectionjnp嘉泰姆
Current-Limit Protection with Frequency Foldbackjnp嘉泰姆
Enable/Shutdown Functionjnp嘉泰姆
Small SOP-8P Packagejnp嘉泰姆
Lead Free and Green Devices Availablejnp嘉泰姆
(RoHS Compliantjnp嘉泰姆
三,应用范围 (Applications)jnp嘉泰姆

LCD Monitor/TVjnp嘉泰姆

Set-Top Boxjnp嘉泰姆
DSL, Switch HUBjnp嘉泰姆
Notebook Computerjnp嘉泰姆

四.下载产品资料PDF文档 jnp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！jnp嘉泰姆

QQ截图20160419174301.jpg jnp嘉泰姆

jnp嘉泰姆

五,产品封装图 (Package)jnp嘉泰姆

jnp嘉泰姆

六.电路原理图jnp嘉泰姆

jnp嘉泰姆

七,功能概述jnp嘉泰姆

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

Switching Regulator > Buck Converterjnp嘉泰姆
Part_No jnp嘉泰姆	Packagejnp嘉泰姆	Architectujnp嘉泰姆	No.ofjnp嘉泰姆 PWM jnp嘉泰姆 Outpujnp嘉泰姆	Drivejnp嘉泰姆 Loutjnp嘉泰姆 (A) jnp嘉泰姆	Vin(V) jnp嘉泰姆		Fmaxjnp嘉泰姆 Khz jnp嘉泰姆	Vref jnp嘉泰姆 (V) jnp嘉泰姆	R-Top (milohm) jnp嘉泰姆	R-Sync (milohm) jnp嘉泰姆	Iq (No load) (uA) jnp嘉泰姆
Part_No jnp嘉泰姆	Packagejnp嘉泰姆	Architectujnp嘉泰姆	No.ofjnp嘉泰姆 PWM jnp嘉泰姆 Outpujnp嘉泰姆	Drivejnp嘉泰姆 Loutjnp嘉泰姆 (A) jnp嘉泰姆	minjnp嘉泰姆	maxjnp嘉泰姆	Fmaxjnp嘉泰姆 Khz jnp嘉泰姆	Vref jnp嘉泰姆 (V) jnp嘉泰姆	R-Top (milohm) jnp嘉泰姆	R-Sync (milohm) jnp嘉泰姆	Iq (No load) (uA) jnp嘉泰姆
CXSD62122jnp嘉泰姆	TQFN5x6-28jnp嘉泰姆	CMjnp嘉泰姆	1jnp嘉泰姆	5jnp嘉泰姆	4.5jnp嘉泰姆	26jnp嘉泰姆	380jnp嘉泰姆	0.8jnp嘉泰姆	50jnp嘉泰姆	20jnp嘉泰姆	1000jnp嘉泰姆
CXSD62123jnp嘉泰姆	SOP-8jnp嘉泰姆	CMjnp嘉泰姆	1jnp嘉泰姆	2jnp嘉泰姆	4.5jnp嘉泰姆	26jnp嘉泰姆	380jnp嘉泰姆	0.8jnp嘉泰姆	100jnp嘉泰姆		1000jnp嘉泰姆
CXSD62124jnp嘉泰姆	SOP-8Pjnp嘉泰姆	CMjnp嘉泰姆	1jnp嘉泰姆	4jnp嘉泰姆	4.5jnp嘉泰姆	26jnp嘉泰姆	380jnp嘉泰姆	0.8jnp嘉泰姆	80jnp嘉泰姆		1000jnp嘉泰姆
CXSD62125jnp嘉泰姆	SOT23-5\|TSOT23-5jnp嘉泰姆	CMjnp嘉泰姆	1jnp嘉泰姆	1jnp嘉泰姆	2.7jnp嘉泰姆	6jnp嘉泰姆	1500jnp嘉泰姆	0.6jnp嘉泰姆	280jnp嘉泰姆	250jnp嘉泰姆	25jnp嘉泰姆
CXSD62125Ajnp嘉泰姆	SOT23-5jnp嘉泰姆	CMjnp嘉泰姆	1jnp嘉泰姆	1jnp嘉泰姆	2.7jnp嘉泰姆	6jnp嘉泰姆	1500jnp嘉泰姆	0.6jnp嘉泰姆	280jnp嘉泰姆	250jnp嘉泰姆
CXSD62126jnp嘉泰姆	SOP-8jnp嘉泰姆	CMjnp嘉泰姆	1jnp嘉泰姆	3jnp嘉泰姆	4.3jnp嘉泰姆	14jnp嘉泰姆	500jnp嘉泰姆	0.8jnp嘉泰姆	70jnp嘉泰姆	70jnp嘉泰姆	500jnp嘉泰姆
CXSD62127jnp嘉泰姆	SOP-8Pjnp嘉泰姆	CMjnp嘉泰姆	1jnp嘉泰姆	3jnp嘉泰姆	4.3jnp嘉泰姆	14jnp嘉泰姆	500jnp嘉泰姆	0.8jnp嘉泰姆	55jnp嘉泰姆	45jnp嘉泰姆	500jnp嘉泰姆
CXSD62128Bjnp嘉泰姆	TDFN3x3-10jnp嘉泰姆			3jnp嘉泰姆	2.6jnp嘉泰姆	5.5jnp嘉泰姆	2000jnp嘉泰姆	0.8jnp嘉泰姆	110jnp嘉泰姆	110jnp嘉泰姆	460jnp嘉泰姆
CXSD62129jnp嘉泰姆	TDFN3x3-10jnp嘉泰姆	CMjnp嘉泰姆	2jnp嘉泰姆	1jnp嘉泰姆	2.7jnp嘉泰姆	6jnp嘉泰姆	1500jnp嘉泰姆	0.6jnp嘉泰姆	280jnp嘉泰姆	250jnp嘉泰姆	500jnp嘉泰姆
CXSD62129Ajnp嘉泰姆	TDFN3x3-10jnp嘉泰姆	CMjnp嘉泰姆	2jnp嘉泰姆	1jnp嘉泰姆	2.7jnp嘉泰姆	6jnp嘉泰姆	1500jnp嘉泰姆	0.6jnp嘉泰姆	280jnp嘉泰姆	250jnp嘉泰姆
CXSD62130jnp嘉泰姆	TDFN2x2-6jnp嘉泰姆	CMjnp嘉泰姆	1jnp嘉泰姆	1jnp嘉泰姆	2.7jnp嘉泰姆	6jnp嘉泰姆	1500jnp嘉泰姆	0.6jnp嘉泰姆	280jnp嘉泰姆	250jnp嘉泰姆	25jnp嘉泰姆
CXSD62130Ajnp嘉泰姆	TDFN2x2-6jnp嘉泰姆	CMjnp嘉泰姆	1jnp嘉泰姆	1jnp嘉泰姆	2.7jnp嘉泰姆	6jnp嘉泰姆	1500jnp嘉泰姆	0.6jnp嘉泰姆	280jnp嘉泰姆	250jnp嘉泰姆
CXSD62131jnp嘉泰姆	TDFN3x3-12jnp嘉泰姆	CMjnp嘉泰姆	2jnp嘉泰姆	1jnp嘉泰姆	2.7jnp嘉泰姆	6jnp嘉泰姆	1500jnp嘉泰姆	0.6jnp嘉泰姆	280jnp嘉泰姆	250jnp嘉泰姆	25jnp嘉泰姆
CXSD62131Ajnp嘉泰姆	TDFN3x3-12jnp嘉泰姆	CMjnp嘉泰姆	2jnp嘉泰姆	1jnp嘉泰姆	2.7jnp嘉泰姆	6jnp嘉泰姆	1500jnp嘉泰姆	0.6jnp嘉泰姆	280jnp嘉泰姆	250jnp嘉泰姆
CXSD62131Cjnp嘉泰姆	TDFN 3x3 12jnp嘉泰姆	CMjnp嘉泰姆	2jnp嘉泰姆	1jnp嘉泰姆	3jnp嘉泰姆	5.5jnp嘉泰姆	1500jnp嘉泰姆	0.6jnp嘉泰姆	280jnp嘉泰姆	250jnp嘉泰姆	30jnp嘉泰姆
CXSD62132jnp嘉泰姆	TQFN3x3-20jnp嘉泰姆	CMjnp嘉泰姆	3jnp嘉泰姆	2jnp嘉泰姆	2.9jnp嘉泰姆	5.5jnp嘉泰姆	1500jnp嘉泰姆	0.6jnp嘉泰姆	-jnp嘉泰姆	-jnp嘉泰姆	300jnp嘉泰姆
CXSD62133jnp嘉泰姆	TDFN2x2-8jnp嘉泰姆	CMjnp嘉泰姆	1jnp嘉泰姆	1jnp嘉泰姆	3.3jnp嘉泰姆	8jnp嘉泰姆	1500jnp嘉泰姆	0.6jnp嘉泰姆	280jnp嘉泰姆	250jnp嘉泰姆	25jnp嘉泰姆
CXSD62134jnp嘉泰姆	SOP-8jnp嘉泰姆	CMjnp嘉泰姆	1jnp嘉泰姆	2jnp嘉泰姆	4.5jnp嘉泰姆	24jnp嘉泰姆	340jnp嘉泰姆	0.925jnp嘉泰姆	110jnp嘉泰姆	110jnp嘉泰姆	1900jnp嘉泰姆
CXSD62135jnp嘉泰姆	SOP-8Pjnp嘉泰姆	CMjnp嘉泰姆	1jnp嘉泰姆	3jnp嘉泰姆	4.5jnp嘉泰姆	24jnp嘉泰姆	340jnp嘉泰姆	0.925jnp嘉泰姆	110jnp嘉泰姆	110jnp嘉泰姆	1900jnp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

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