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

发表时间：2020-04-28浏览次数：9

1.产品概述         2.产品特点ts9嘉泰姆
3.应用范围       4.下载产品资料PDF文档 ts9嘉泰姆
5.产品封装图                     6.电路原理图             ts9嘉泰姆
7.功能概述       8.相关产品ts9嘉泰姆

一,产品概述(General Description) ts9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.ts9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.ts9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.ts9嘉泰姆
This device, available SOP-8P, provides a very compact system solution external components and PCB area.ts9嘉泰姆
二.产品特点(Features)ts9嘉泰姆
Wide Input Voltage from 4.5V to 24Vts9嘉泰姆
3A Continuous Output Currentts9嘉泰姆
Adjustable Output Voltage from 0.925V to 20Vts9嘉泰姆
Intergrated High/Low Side MOSFETts9嘉泰姆
PFM/PWM mode Operationts9嘉泰姆
Fixed 340kHz Switching Frequencyts9嘉泰姆
Stable with Low ESR Ceramic Output Capacitorsts9嘉泰姆
Power-On-Reset Detectionts9嘉泰姆
Programmable Soft-Startts9嘉泰姆
Over-Temperature Protectionts9嘉泰姆
Current-Limit Protection with Frequency Foldbackts9嘉泰姆
Enable/Shutdown Functionts9嘉泰姆
Small SOP-8P Packagets9嘉泰姆
Lead Free and Green Devices Availablets9嘉泰姆
(RoHS Compliantts9嘉泰姆
三,应用范围 (Applications)ts9嘉泰姆

LCD Monitor/TVts9嘉泰姆

Set-Top Boxts9嘉泰姆
DSL, Switch HUBts9嘉泰姆
Notebook Computerts9嘉泰姆

四.下载产品资料PDF文档 ts9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！ts9嘉泰姆

QQ截图20160419174301.jpg ts9嘉泰姆

ts9嘉泰姆

五,产品封装图 (Package)ts9嘉泰姆

ts9嘉泰姆

六.电路原理图ts9嘉泰姆

ts9嘉泰姆

七,功能概述ts9嘉泰姆

Main Control Loopts9嘉泰姆
The CXSD62144 is a constant frequency current mode switching regulator. During normal operation, the inter-ts9嘉泰姆
nal N-channel power MOSFET is turned on each cycle when the oscillator sets an internal RS latch and wouldts9嘉泰姆
be turned off when an internal current comparator (ICMP) resets the latch. The peak inductor current at which ICMPts9嘉泰姆
resets the RS latch is controlled by the voltage on the COMP pin, which is the output of the error amplifierts9嘉泰姆
(EAMP). An external resistive divider connected between VOUT and ground allows the EAMP to receive an outputts9嘉泰姆
feedback voltage VFB at FB pin. When the load current increases, it causes a slight decrease in VFB relative tots9嘉泰姆
the 0.925V reference, which in turn causes the COMP voltage to increase until the average inductor currentts9嘉泰姆
matches the new load current.ts9嘉泰姆
VIN Power-On-Reset (POR) and EN Under-voltage Lockoutts9嘉泰姆
The CXSD62144 keep monitoring the voltage on VIN pin to prevent wrong logic operations which may occur whents9嘉泰姆
VIN voltage is not high enough for the internal control circuitry to operate. The VIN POR has a rising thresholdts9嘉泰姆
of 4.05V (typical) with 0.3V of hysteresis.ts9嘉泰姆
An external under-voltage lockout (UVLO) is sensed atthe EN pin. The EN UVLO has a rising threshold of 2.5Vts9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 ENts9嘉泰姆
voltages exceed their respective voltage thresholds, the IC starts a start-up process and then ramps up the outputts9嘉泰姆
voltage to the setting of output voltage.ts9嘉泰姆
Over-Temperature Protection (OTP)ts9嘉泰姆
The over-temperature circuit limits the junction tempera-ture of the CXSD62144 When the junction temperature ex-ts9嘉泰姆
ceeds TJ =+160oC, a thermal sensor turns off the power MOSFET, allowing the device to cool down. The thermalts9嘉泰姆
sensor allows the converter to start a start-up process and regulate the output voltage again after the junctionts9嘉泰姆
temperature cools by 50oC.ts9嘉泰姆
The OTP designed with a 50 oC hysteresis lowers the average T J during c ontinuous thermal overload conditions,ts9嘉泰姆
increasing life time of the IC.ts9嘉泰姆
Enable/Shutdownts9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.ts9嘉泰姆
Current-Limit Protectionts9嘉泰姆
The CXSD62144 monitors the output current, flowing through the N-Channel power MOSFET, and limits thets9嘉泰姆
IC from damages during overload, short-circuit and over-voltage conditions.ts9嘉泰姆
Frequency Foldbackts9嘉泰姆
The foldback frequency is controlled by the FB voltage.When the FB pin voltage is under 0.6V, the frequency ofts9嘉泰姆
the oscillator will be reduced to 110kHz. This lower fre-quency allows the inductor current to safely discharge,ts9嘉泰姆
thereby preventing current runaway. The oscillator’s fre-quency will switch to its designed rate when the feedbackts9嘉泰姆
voltage on FB rises above the rising frequency foldback threshold (0.6V, typical) again.ts9嘉泰姆
Over-Voltage Protectionts9嘉泰姆
The over-voltage function monitors the output voltage by FB pin. When the FB voltage increase over 120% of thets9嘉泰姆
reference voltage, the over-voltage protection compara-tor will force the high-and low-side MOSFET gate driverts9嘉泰姆
off. As soon as the output voltage is within regulation, the OVP comparator is disengaged. The chip will restore itsts9嘉泰姆
normal operation.ts9嘉泰姆
八,相关产品 更多同类产品.......ts9嘉泰姆

Switching Regulator > Buck Converterts9嘉泰姆
Part_No ts9嘉泰姆	Packagets9嘉泰姆	Architectuts9嘉泰姆	No.ofts9嘉泰姆 PWM ts9嘉泰姆 Outputs9嘉泰姆	Drivets9嘉泰姆 Loutts9嘉泰姆 (A) ts9嘉泰姆	Vin(V) ts9嘉泰姆		Fmaxts9嘉泰姆 Khz ts9嘉泰姆	Vref ts9嘉泰姆 (V) ts9嘉泰姆	R-Top (milohm) ts9嘉泰姆	R-Sync (milohm) ts9嘉泰姆	Iq (No load) (uA) ts9嘉泰姆
Part_No ts9嘉泰姆	Packagets9嘉泰姆	Architectuts9嘉泰姆	No.ofts9嘉泰姆 PWM ts9嘉泰姆 Outputs9嘉泰姆	Drivets9嘉泰姆 Loutts9嘉泰姆 (A) ts9嘉泰姆	mints9嘉泰姆	maxts9嘉泰姆	Fmaxts9嘉泰姆 Khz ts9嘉泰姆	Vref ts9嘉泰姆 (V) ts9嘉泰姆	R-Top (milohm) ts9嘉泰姆	R-Sync (milohm) ts9嘉泰姆	Iq (No load) (uA) ts9嘉泰姆
CXSD62122ts9嘉泰姆	TQFN5x6-28ts9嘉泰姆	CMts9嘉泰姆	1ts9嘉泰姆	5ts9嘉泰姆	4.5ts9嘉泰姆	26ts9嘉泰姆	380ts9嘉泰姆	0.8ts9嘉泰姆	50ts9嘉泰姆	20ts9嘉泰姆	1000ts9嘉泰姆
CXSD62123ts9嘉泰姆	SOP-8ts9嘉泰姆	CMts9嘉泰姆	1ts9嘉泰姆	2ts9嘉泰姆	4.5ts9嘉泰姆	26ts9嘉泰姆	380ts9嘉泰姆	0.8ts9嘉泰姆	100ts9嘉泰姆		1000ts9嘉泰姆
CXSD62124ts9嘉泰姆	SOP-8Pts9嘉泰姆	CMts9嘉泰姆	1ts9嘉泰姆	4ts9嘉泰姆	4.5ts9嘉泰姆	26ts9嘉泰姆	380ts9嘉泰姆	0.8ts9嘉泰姆	80ts9嘉泰姆		1000ts9嘉泰姆
CXSD62125ts9嘉泰姆	SOT23-5\|TSOT23-5ts9嘉泰姆	CMts9嘉泰姆	1ts9嘉泰姆	1ts9嘉泰姆	2.7ts9嘉泰姆	6ts9嘉泰姆	1500ts9嘉泰姆	0.6ts9嘉泰姆	280ts9嘉泰姆	250ts9嘉泰姆	25ts9嘉泰姆
CXSD62125Ats9嘉泰姆	SOT23-5ts9嘉泰姆	CMts9嘉泰姆	1ts9嘉泰姆	1ts9嘉泰姆	2.7ts9嘉泰姆	6ts9嘉泰姆	1500ts9嘉泰姆	0.6ts9嘉泰姆	280ts9嘉泰姆	250ts9嘉泰姆
CXSD62126ts9嘉泰姆	SOP-8ts9嘉泰姆	CMts9嘉泰姆	1ts9嘉泰姆	3ts9嘉泰姆	4.3ts9嘉泰姆	14ts9嘉泰姆	500ts9嘉泰姆	0.8ts9嘉泰姆	70ts9嘉泰姆	70ts9嘉泰姆	500ts9嘉泰姆
CXSD62127ts9嘉泰姆	SOP-8Pts9嘉泰姆	CMts9嘉泰姆	1ts9嘉泰姆	3ts9嘉泰姆	4.3ts9嘉泰姆	14ts9嘉泰姆	500ts9嘉泰姆	0.8ts9嘉泰姆	55ts9嘉泰姆	45ts9嘉泰姆	500ts9嘉泰姆
CXSD62128Bts9嘉泰姆	TDFN3x3-10ts9嘉泰姆			3ts9嘉泰姆	2.6ts9嘉泰姆	5.5ts9嘉泰姆	2000ts9嘉泰姆	0.8ts9嘉泰姆	110ts9嘉泰姆	110ts9嘉泰姆	460ts9嘉泰姆
CXSD62129ts9嘉泰姆	TDFN3x3-10ts9嘉泰姆	CMts9嘉泰姆	2ts9嘉泰姆	1ts9嘉泰姆	2.7ts9嘉泰姆	6ts9嘉泰姆	1500ts9嘉泰姆	0.6ts9嘉泰姆	280ts9嘉泰姆	250ts9嘉泰姆	500ts9嘉泰姆
CXSD62129Ats9嘉泰姆	TDFN3x3-10ts9嘉泰姆	CMts9嘉泰姆	2ts9嘉泰姆	1ts9嘉泰姆	2.7ts9嘉泰姆	6ts9嘉泰姆	1500ts9嘉泰姆	0.6ts9嘉泰姆	280ts9嘉泰姆	250ts9嘉泰姆
CXSD62130ts9嘉泰姆	TDFN2x2-6ts9嘉泰姆	CMts9嘉泰姆	1ts9嘉泰姆	1ts9嘉泰姆	2.7ts9嘉泰姆	6ts9嘉泰姆	1500ts9嘉泰姆	0.6ts9嘉泰姆	280ts9嘉泰姆	250ts9嘉泰姆	25ts9嘉泰姆
CXSD62130Ats9嘉泰姆	TDFN2x2-6ts9嘉泰姆	CMts9嘉泰姆	1ts9嘉泰姆	1ts9嘉泰姆	2.7ts9嘉泰姆	6ts9嘉泰姆	1500ts9嘉泰姆	0.6ts9嘉泰姆	280ts9嘉泰姆	250ts9嘉泰姆
CXSD62131ts9嘉泰姆	TDFN3x3-12ts9嘉泰姆	CMts9嘉泰姆	2ts9嘉泰姆	1ts9嘉泰姆	2.7ts9嘉泰姆	6ts9嘉泰姆	1500ts9嘉泰姆	0.6ts9嘉泰姆	280ts9嘉泰姆	250ts9嘉泰姆	25ts9嘉泰姆
CXSD62131Ats9嘉泰姆	TDFN3x3-12ts9嘉泰姆	CMts9嘉泰姆	2ts9嘉泰姆	1ts9嘉泰姆	2.7ts9嘉泰姆	6ts9嘉泰姆	1500ts9嘉泰姆	0.6ts9嘉泰姆	280ts9嘉泰姆	250ts9嘉泰姆
CXSD62131Cts9嘉泰姆	TDFN 3x3 12ts9嘉泰姆	CMts9嘉泰姆	2ts9嘉泰姆	1ts9嘉泰姆	3ts9嘉泰姆	5.5ts9嘉泰姆	1500ts9嘉泰姆	0.6ts9嘉泰姆	280ts9嘉泰姆	250ts9嘉泰姆	30ts9嘉泰姆
CXSD62132ts9嘉泰姆	TQFN3x3-20ts9嘉泰姆	CMts9嘉泰姆	3ts9嘉泰姆	2ts9嘉泰姆	2.9ts9嘉泰姆	5.5ts9嘉泰姆	1500ts9嘉泰姆	0.6ts9嘉泰姆	-ts9嘉泰姆	-ts9嘉泰姆	300ts9嘉泰姆
CXSD62133ts9嘉泰姆	TDFN2x2-8ts9嘉泰姆	CMts9嘉泰姆	1ts9嘉泰姆	1ts9嘉泰姆	3.3ts9嘉泰姆	8ts9嘉泰姆	1500ts9嘉泰姆	0.6ts9嘉泰姆	280ts9嘉泰姆	250ts9嘉泰姆	25ts9嘉泰姆
CXSD62134ts9嘉泰姆	SOP-8ts9嘉泰姆	CMts9嘉泰姆	1ts9嘉泰姆	2ts9嘉泰姆	4.5ts9嘉泰姆	24ts9嘉泰姆	340ts9嘉泰姆	0.925ts9嘉泰姆	110ts9嘉泰姆	110ts9嘉泰姆	1900ts9嘉泰姆
CXSD62135ts9嘉泰姆	SOP-8Pts9嘉泰姆	CMts9嘉泰姆	1ts9嘉泰姆	3ts9嘉泰姆	4.5ts9嘉泰姆	24ts9嘉泰姆	340ts9嘉泰姆	0.925ts9嘉泰姆	110ts9嘉泰姆	110ts9嘉泰姆	1900ts9嘉泰姆

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