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

首页 > 新闻中心 > 行业新闻

发表时间：2020-04-28浏览次数：133

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g1y嘉泰姆
3.应用范围       4.下载产品资料PDF文档 g1y嘉泰姆
5.产品封装图                     6.电路原理图             g1y嘉泰姆
7.功能概述       8.相关产品g1y嘉泰姆

一,产品概述(General Description) g1y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.g1y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.g1y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.g1y嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.g1y嘉泰姆
二.产品特点(Features)g1y嘉泰姆
Wide Input Voltage from 4.5V to 24Vg1y嘉泰姆
3A Continuous Output Currentg1y嘉泰姆
Adjustable Output Voltage from 0.925V to 20Vg1y嘉泰姆
Intergrated High/Low Side MOSFETg1y嘉泰姆
PFM/PWM mode Operationg1y嘉泰姆
Fixed 340kHz Switching Frequencyg1y嘉泰姆
Stable with Low ESR Ceramic Output Capacitorsg1y嘉泰姆
Power-On-Reset Detectiong1y嘉泰姆
Programmable Soft-Startg1y嘉泰姆
Over-Temperature Protectiong1y嘉泰姆
Current-Limit Protection with Frequency Foldbackg1y嘉泰姆
Enable/Shutdown Functiong1y嘉泰姆
Small SOP-8P Packageg1y嘉泰姆
Lead Free and Green Devices Availableg1y嘉泰姆
(RoHS Compliantg1y嘉泰姆
三,应用范围 (Applications)g1y嘉泰姆

LCD Monitor/TVg1y嘉泰姆

Set-Top Boxg1y嘉泰姆
DSL, Switch HUBg1y嘉泰姆
Notebook Computerg1y嘉泰姆

四.下载产品资料PDF文档 g1y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！g1y嘉泰姆

QQ截图20160419174301.jpg g1y嘉泰姆

g1y嘉泰姆

五,产品封装图 (Package)g1y嘉泰姆

g1y嘉泰姆

六.电路原理图g1y嘉泰姆

g1y嘉泰姆

七,功能概述g1y嘉泰姆

Main Control Loopg1y嘉泰姆
The CXSD62144 is a constant frequency current mode switching regulator. During normal operation, the inter-g1y嘉泰姆
nal N-channel power MOSFET is turned on each cycle when the oscillator sets an internal RS latch and wouldg1y嘉泰姆
be turned off when an internal current comparator (ICMP) resets the latch. The peak inductor current at which ICMPg1y嘉泰姆
resets the RS latch is controlled by the voltage on the COMP pin, which is the output of the error amplifierg1y嘉泰姆
(EAMP). An external resistive divider connected between VOUT and ground allows the EAMP to receive an outputg1y嘉泰姆
feedback voltage VFB at FB pin. When the load current increases, it causes a slight decrease in VFB relative tog1y嘉泰姆
the 0.925V reference, which in turn causes the COMP voltage to increase until the average inductor currentg1y嘉泰姆
matches the new load current.g1y嘉泰姆
VIN Power-On-Reset (POR) and EN Under-voltage Lockoutg1y嘉泰姆
The CXSD62144 keep monitoring the voltage on VIN pin to prevent wrong logic operations which may occur wheng1y嘉泰姆
VIN voltage is not high enough for the internal control circuitry to operate. The VIN POR has a rising thresholdg1y嘉泰姆
of 4.05V (typical) with 0.3V of hysteresis.g1y嘉泰姆
An external under-voltage lockout (UVLO) is sensed atthe EN pin. The EN UVLO has a rising threshold of 2.5Vg1y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 ENg1y嘉泰姆
voltages exceed their respective voltage thresholds, the IC starts a start-up process and then ramps up the outputg1y嘉泰姆
voltage to the setting of output voltage.g1y嘉泰姆
Over-Temperature Protection (OTP)g1y嘉泰姆
The over-temperature circuit limits the junction tempera-ture of the CXSD62144 When the junction temperature ex-g1y嘉泰姆
ceeds TJ =+160oC, a thermal sensor turns off the power MOSFET, allowing the device to cool down. The thermalg1y嘉泰姆
sensor allows the converter to start a start-up process and regulate the output voltage again after the junctiong1y嘉泰姆
temperature cools by 50oC.g1y嘉泰姆
The OTP designed with a 50 oC hysteresis lowers the average T J during c ontinuous thermal overload conditions,g1y嘉泰姆
increasing life time of the IC.g1y嘉泰姆
Enable/Shutdowng1y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.g1y嘉泰姆
Current-Limit Protectiong1y嘉泰姆
The CXSD62144 monitors the output current, flowing through the N-Channel power MOSFET, and limits theg1y嘉泰姆
IC from damages during overload, short-circuit and over-voltage conditions.g1y嘉泰姆
Frequency Foldbackg1y嘉泰姆
The foldback frequency is controlled by the FB voltage.When the FB pin voltage is under 0.6V, the frequency ofg1y嘉泰姆
the oscillator will be reduced to 110kHz. This lower fre-quency allows the inductor current to safely discharge,g1y嘉泰姆
thereby preventing current runaway. The oscillator’s fre-quency will switch to its designed rate when the feedbackg1y嘉泰姆
voltage on FB rises above the rising frequency foldback threshold (0.6V, typical) again.g1y嘉泰姆
Over-Voltage Protectiong1y嘉泰姆
The over-voltage function monitors the output voltage by FB pin. When the FB voltage increase over 120% of theg1y嘉泰姆
reference voltage, the over-voltage protection compara-tor will force the high-and low-side MOSFET gate driverg1y嘉泰姆
off. As soon as the output voltage is within regulation, the OVP comparator is disengaged. The chip will restore itsg1y嘉泰姆
normal operation.g1y嘉泰姆
八,相关产品 更多同类产品.......g1y嘉泰姆

Switching Regulator > Buck Converterg1y嘉泰姆
Part_No g1y嘉泰姆	Packageg1y嘉泰姆	Architectug1y嘉泰姆	No.ofg1y嘉泰姆 PWM g1y嘉泰姆 Outpug1y嘉泰姆	Driveg1y嘉泰姆 Loutg1y嘉泰姆 (A) g1y嘉泰姆	Vin(V) g1y嘉泰姆		Fmaxg1y嘉泰姆 Khz g1y嘉泰姆	Vref g1y嘉泰姆 (V) g1y嘉泰姆	R-Top (milohm) g1y嘉泰姆	R-Sync (milohm) g1y嘉泰姆	Iq (No load) (uA) g1y嘉泰姆
Part_No g1y嘉泰姆	Packageg1y嘉泰姆	Architectug1y嘉泰姆	No.ofg1y嘉泰姆 PWM g1y嘉泰姆 Outpug1y嘉泰姆	Driveg1y嘉泰姆 Loutg1y嘉泰姆 (A) g1y嘉泰姆	ming1y嘉泰姆	maxg1y嘉泰姆	Fmaxg1y嘉泰姆 Khz g1y嘉泰姆	Vref g1y嘉泰姆 (V) g1y嘉泰姆	R-Top (milohm) g1y嘉泰姆	R-Sync (milohm) g1y嘉泰姆	Iq (No load) (uA) g1y嘉泰姆
CXSD62122g1y嘉泰姆	TQFN5x6-28g1y嘉泰姆	CMg1y嘉泰姆	1g1y嘉泰姆	5g1y嘉泰姆	4.5g1y嘉泰姆	26g1y嘉泰姆	380g1y嘉泰姆	0.8g1y嘉泰姆	50g1y嘉泰姆	20g1y嘉泰姆	1000g1y嘉泰姆
CXSD62123g1y嘉泰姆	SOP-8g1y嘉泰姆	CMg1y嘉泰姆	1g1y嘉泰姆	2g1y嘉泰姆	4.5g1y嘉泰姆	26g1y嘉泰姆	380g1y嘉泰姆	0.8g1y嘉泰姆	100g1y嘉泰姆		1000g1y嘉泰姆
CXSD62124g1y嘉泰姆	SOP-8Pg1y嘉泰姆	CMg1y嘉泰姆	1g1y嘉泰姆	4g1y嘉泰姆	4.5g1y嘉泰姆	26g1y嘉泰姆	380g1y嘉泰姆	0.8g1y嘉泰姆	80g1y嘉泰姆		1000g1y嘉泰姆
CXSD62125g1y嘉泰姆	SOT23-5\|TSOT23-5g1y嘉泰姆	CMg1y嘉泰姆	1g1y嘉泰姆	1g1y嘉泰姆	2.7g1y嘉泰姆	6g1y嘉泰姆	1500g1y嘉泰姆	0.6g1y嘉泰姆	280g1y嘉泰姆	250g1y嘉泰姆	25g1y嘉泰姆
CXSD62125Ag1y嘉泰姆	SOT23-5g1y嘉泰姆	CMg1y嘉泰姆	1g1y嘉泰姆	1g1y嘉泰姆	2.7g1y嘉泰姆	6g1y嘉泰姆	1500g1y嘉泰姆	0.6g1y嘉泰姆	280g1y嘉泰姆	250g1y嘉泰姆
CXSD62126g1y嘉泰姆	SOP-8g1y嘉泰姆	CMg1y嘉泰姆	1g1y嘉泰姆	3g1y嘉泰姆	4.3g1y嘉泰姆	14g1y嘉泰姆	500g1y嘉泰姆	0.8g1y嘉泰姆	70g1y嘉泰姆	70g1y嘉泰姆	500g1y嘉泰姆
CXSD62127g1y嘉泰姆	SOP-8Pg1y嘉泰姆	CMg1y嘉泰姆	1g1y嘉泰姆	3g1y嘉泰姆	4.3g1y嘉泰姆	14g1y嘉泰姆	500g1y嘉泰姆	0.8g1y嘉泰姆	55g1y嘉泰姆	45g1y嘉泰姆	500g1y嘉泰姆
CXSD62128Bg1y嘉泰姆	TDFN3x3-10g1y嘉泰姆			3g1y嘉泰姆	2.6g1y嘉泰姆	5.5g1y嘉泰姆	2000g1y嘉泰姆	0.8g1y嘉泰姆	110g1y嘉泰姆	110g1y嘉泰姆	460g1y嘉泰姆
CXSD62129g1y嘉泰姆	TDFN3x3-10g1y嘉泰姆	CMg1y嘉泰姆	2g1y嘉泰姆	1g1y嘉泰姆	2.7g1y嘉泰姆	6g1y嘉泰姆	1500g1y嘉泰姆	0.6g1y嘉泰姆	280g1y嘉泰姆	250g1y嘉泰姆	500g1y嘉泰姆
CXSD62129Ag1y嘉泰姆	TDFN3x3-10g1y嘉泰姆	CMg1y嘉泰姆	2g1y嘉泰姆	1g1y嘉泰姆	2.7g1y嘉泰姆	6g1y嘉泰姆	1500g1y嘉泰姆	0.6g1y嘉泰姆	280g1y嘉泰姆	250g1y嘉泰姆
CXSD62130g1y嘉泰姆	TDFN2x2-6g1y嘉泰姆	CMg1y嘉泰姆	1g1y嘉泰姆	1g1y嘉泰姆	2.7g1y嘉泰姆	6g1y嘉泰姆	1500g1y嘉泰姆	0.6g1y嘉泰姆	280g1y嘉泰姆	250g1y嘉泰姆	25g1y嘉泰姆
CXSD62130Ag1y嘉泰姆	TDFN2x2-6g1y嘉泰姆	CMg1y嘉泰姆	1g1y嘉泰姆	1g1y嘉泰姆	2.7g1y嘉泰姆	6g1y嘉泰姆	1500g1y嘉泰姆	0.6g1y嘉泰姆	280g1y嘉泰姆	250g1y嘉泰姆
CXSD62131g1y嘉泰姆	TDFN3x3-12g1y嘉泰姆	CMg1y嘉泰姆	2g1y嘉泰姆	1g1y嘉泰姆	2.7g1y嘉泰姆	6g1y嘉泰姆	1500g1y嘉泰姆	0.6g1y嘉泰姆	280g1y嘉泰姆	250g1y嘉泰姆	25g1y嘉泰姆
CXSD62131Ag1y嘉泰姆	TDFN3x3-12g1y嘉泰姆	CMg1y嘉泰姆	2g1y嘉泰姆	1g1y嘉泰姆	2.7g1y嘉泰姆	6g1y嘉泰姆	1500g1y嘉泰姆	0.6g1y嘉泰姆	280g1y嘉泰姆	250g1y嘉泰姆
CXSD62131Cg1y嘉泰姆	TDFN 3x3 12g1y嘉泰姆	CMg1y嘉泰姆	2g1y嘉泰姆	1g1y嘉泰姆	3g1y嘉泰姆	5.5g1y嘉泰姆	1500g1y嘉泰姆	0.6g1y嘉泰姆	280g1y嘉泰姆	250g1y嘉泰姆	30g1y嘉泰姆
CXSD62132g1y嘉泰姆	TQFN3x3-20g1y嘉泰姆	CMg1y嘉泰姆	3g1y嘉泰姆	2g1y嘉泰姆	2.9g1y嘉泰姆	5.5g1y嘉泰姆	1500g1y嘉泰姆	0.6g1y嘉泰姆	-g1y嘉泰姆	-g1y嘉泰姆	300g1y嘉泰姆
CXSD62133g1y嘉泰姆	TDFN2x2-8g1y嘉泰姆	CMg1y嘉泰姆	1g1y嘉泰姆	1g1y嘉泰姆	3.3g1y嘉泰姆	8g1y嘉泰姆	1500g1y嘉泰姆	0.6g1y嘉泰姆	280g1y嘉泰姆	250g1y嘉泰姆	25g1y嘉泰姆
CXSD62134g1y嘉泰姆	SOP-8g1y嘉泰姆	CMg1y嘉泰姆	1g1y嘉泰姆	2g1y嘉泰姆	4.5g1y嘉泰姆	24g1y嘉泰姆	340g1y嘉泰姆	0.925g1y嘉泰姆	110g1y嘉泰姆	110g1y嘉泰姆	1900g1y嘉泰姆
CXSD62135g1y嘉泰姆	SOP-8Pg1y嘉泰姆	CMg1y嘉泰姆	1g1y嘉泰姆	3g1y嘉泰姆	4.5g1y嘉泰姆	24g1y嘉泰姆	340g1y嘉泰姆	0.925g1y嘉泰姆	110g1y嘉泰姆	110g1y嘉泰姆	1900g1y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

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