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

一,产品概述(General Description)     CXSD62136 CXSD62136B is a 2A synchronous buck converter with integrated power MOSFETs.The CXSD62136 CXSD62136B design with a current-mode control scheme, can convert wide input voltage of 4.5V to 24V to the output voltage adjustable from 0.92V to 20V to provide excellent output voltage regulation. The CXSD62136 CXSD62136B is also equipped with Power-on-reset, softstart, and whole protections (over-temperature, and current-limit) into a single package.This device, available SOP-8, provides a very compact system solution external components and PCB area  JeI嘉泰姆

二.产品特点(Features)JeI嘉泰姆

Wide Input Voltage from 4.5V to 24VJeI嘉泰姆
2A Continuous Output CurrentJeI嘉泰姆
Adjustable Output Voltage from 0.92V to 20VJeI嘉泰姆
Intergrated N-MOSFETJeI嘉泰姆
Fixed 340kHz Switching FrequencyJeI嘉泰姆
Stable with Low ESR CapacitorsJeI嘉泰姆
Power-On-Reset DetectionJeI嘉泰姆
Programmable Soft-StartJeI嘉泰姆
Over-Temperature ProtectionJeI嘉泰姆
Over-Voltage ProtectionJeI嘉泰姆
Current-Limit Protection with Frequency FoldbackJeI嘉泰姆
Enable/Shutdown FunctionJeI嘉泰姆
Small SOP-8 PackageJeI嘉泰姆
Lead Free and Green Devices Available (RoHS Compliant)JeI嘉泰姆

三,应用范围 (Applications)JeI嘉泰姆

LCD Monitor/TVJeI嘉泰姆
Set-Top BoxJeI嘉泰姆

DSL, Switch HUBJeI嘉泰姆
Notebook ComputerJeI嘉泰姆

四.下载产品资料PDF文档 JeI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！JeI嘉泰姆

 JeI嘉泰姆

五,产品封装图 (Package)JeI嘉泰姆

JeI嘉泰姆

六.电路原理图JeI嘉泰姆

JeI嘉泰姆

• 七,功能概述JeI嘉泰姆

  ---

Main Control Loop The CXSD62136 CXSD62136B is a constant frequency current mode switching regulator. During normal operation, the inter-JeI嘉泰姆

nal N-channel power MOSFET is turned on each cycle when the oscillator sets an internal RS latch and wouldJeI嘉泰姆
be turned off when an internal current comparator (ICMP) resets the latch. The peak inductor current at which ICMPJeI嘉泰姆
resets the RS latch is controlled by the voltage on the COMP pin, which is the output of the error amplifierJeI嘉泰姆
(EAMP). An external resistive divider connected between VOUT and ground allows the EAMP to receive an outputJeI嘉泰姆
feedback voltage VFB at FB pin. When the load current increases, it causes a slight decrease in VFB relative toJeI嘉泰姆
the 0.92V reference, which in turn causes the COMP volt- age to increase until the average inductor current matchesJeI嘉泰姆
the new load current. JeI嘉泰姆
VIN Power-On-Reset (POR) and EN Under-voltage LockoutJeI嘉泰姆
The CXSD62136 CXSD62136B keep monitoring the voltage on VIN pin to prevent wrong logic operations which may occur when VIN voltage is not high enough for the internal control circuitry to operate. The VIN POR has a rising thresholdJeI嘉泰姆
of 4.1V (typical) with 0.5V of hysteresis.An external under-voltage lockout (UVLO) is sensed at the EN pin. TheJeI嘉泰姆
EN UVLO has a rising threshold of 2.5V with 0.2V of hysteresis. The EN pin should be connectedJeI嘉泰姆
a resistor divider from VIN to EN.After the VIN and EN voltages exceed their respective voltage thresholds,JeI嘉泰姆
the IC starts a start-up process and then ramps up the output voltage to the setting of output voltage.JeI嘉泰姆
Over-Temperature Protection (OTP)JeI嘉泰姆
The over-temperature circuit limits the junction tempera-ture of the CXSD62136 CXSD62136B. When the junction temperature ex-ceeds TJ = +160oC, a thermal sensor turns off the power MOSFET, allowing the devices to cool. The thermal sen-sor allows the converter to start a start-up process and regulate the output voltage again after the junction tem-JeI嘉泰姆
perature cools by 50oC.The OTP is designed with a 50oC hysteresis to lower the average TJ during continuous thermal overload conditions,increasing lifetime of the lC.JeI嘉泰姆
Enable / ShutdownJeI嘉泰姆
Driving EN to ground places the CXSD62136 CXSD62136B in shutdown. When in shutdown, the internal power MOSFET turns off,all internal circuitry shuts down.JeI嘉泰姆
Current-Limit ProtectionJeI嘉泰姆
The CXSD62136 CXSD62136B monitors the output current, flowing through the N-Channel power MOSFET, and limits theJeI嘉泰姆
IC from damages during overload, short-circuit and over- voltage conditions. JeI嘉泰姆
Frequency FoldbackJeI嘉泰姆
The foldback frequency is controlled by the FB voltage.When the FB pin voltage is under 0.6V, the frequency ofJeI嘉泰姆
the oscillator will be reduced to 110kHz. This lower fre-quency allows the inductor current to safely discharge,JeI嘉泰姆
thereby preventing current runaway. The oscillator’s fre-quency will switch to its designed rate when the feedbackJeI嘉泰姆
voltage on FB rises above the rising frequency foldback threshold (0.6V, typical) again.JeI嘉泰姆
Over-Voltage ProtectionJeI嘉泰姆
The over-voltage function monitors the output voltage by FB pin. When the FB voltage increase over 120% of theJeI嘉泰姆
reference voltage, the over-voltage protection compara-tor will force the low-side MOSFET gate driver high. ThisJeI嘉泰姆
action actively pulls down the output voltage. As soon as the output voltage is within regulation, the OVP compara-JeI嘉泰姆
tor is disengaged. The chip will restore its normal operation.JeI嘉泰姆

八,相关产品         更多同类产品.......JeI嘉泰姆

• Switching Regulator > Buck ConverterJeI嘉泰姆
  Part_No JeI嘉泰姆	PackageJeI嘉泰姆	ArchitectuJeI嘉泰姆	No.ofJeI嘉泰姆 PWM JeI嘉泰姆 OutpuJeI嘉泰姆	DriveJeI嘉泰姆 LoutJeI嘉泰姆 (A) JeI嘉泰姆	Vin(V) JeI嘉泰姆		FmaxJeI嘉泰姆 Khz JeI嘉泰姆	Vref JeI嘉泰姆 (V) JeI嘉泰姆	R-Top (milohm) JeI嘉泰姆	R-Sync (milohm) JeI嘉泰姆	Iq (No load) (uA) JeI嘉泰姆
  					minJeI嘉泰姆	maxJeI嘉泰姆
  CXSD62122JeI嘉泰姆	TQFN5x6-28JeI嘉泰姆	CMJeI嘉泰姆	1JeI嘉泰姆	5JeI嘉泰姆	4.5JeI嘉泰姆	26JeI嘉泰姆	380JeI嘉泰姆	0.8JeI嘉泰姆	50JeI嘉泰姆	20JeI嘉泰姆	1000JeI嘉泰姆
  CXSD62123JeI嘉泰姆	SOP-8JeI嘉泰姆	CMJeI嘉泰姆	1JeI嘉泰姆	2JeI嘉泰姆	4.5JeI嘉泰姆	26JeI嘉泰姆	380JeI嘉泰姆	0.8JeI嘉泰姆	100JeI嘉泰姆		1000JeI嘉泰姆
  CXSD62124JeI嘉泰姆	SOP-8PJeI嘉泰姆	CMJeI嘉泰姆	1JeI嘉泰姆	4JeI嘉泰姆	4.5JeI嘉泰姆	26JeI嘉泰姆	380JeI嘉泰姆	0.8JeI嘉泰姆	80JeI嘉泰姆		1000JeI嘉泰姆
  CXSD62125JeI嘉泰姆	SOT23-5|TSOT23-5JeI嘉泰姆	CMJeI嘉泰姆	1JeI嘉泰姆	1JeI嘉泰姆	2.7JeI嘉泰姆	6JeI嘉泰姆	1500JeI嘉泰姆	0.6JeI嘉泰姆	280JeI嘉泰姆	250JeI嘉泰姆	25JeI嘉泰姆
  CXSD62125AJeI嘉泰姆	SOT23-5JeI嘉泰姆	CMJeI嘉泰姆	1JeI嘉泰姆	1JeI嘉泰姆	2.7JeI嘉泰姆	6JeI嘉泰姆	1500JeI嘉泰姆	0.6JeI嘉泰姆	280JeI嘉泰姆	250JeI嘉泰姆
  CXSD62126JeI嘉泰姆	SOP-8JeI嘉泰姆	CMJeI嘉泰姆	1JeI嘉泰姆	3JeI嘉泰姆	4.3JeI嘉泰姆	14JeI嘉泰姆	500JeI嘉泰姆	0.8JeI嘉泰姆	70JeI嘉泰姆	70JeI嘉泰姆	500JeI嘉泰姆
  CXSD62127JeI嘉泰姆	SOP-8PJeI嘉泰姆	CMJeI嘉泰姆	1JeI嘉泰姆	3JeI嘉泰姆	4.3JeI嘉泰姆	14JeI嘉泰姆	500JeI嘉泰姆	0.8JeI嘉泰姆	55JeI嘉泰姆	45JeI嘉泰姆	500JeI嘉泰姆
  CXSD62128BJeI嘉泰姆	TDFN3x3-10JeI嘉泰姆			3JeI嘉泰姆	2.6JeI嘉泰姆	5.5JeI嘉泰姆	2000JeI嘉泰姆	0.8JeI嘉泰姆	110JeI嘉泰姆	110JeI嘉泰姆	460JeI嘉泰姆
  CXSD62129JeI嘉泰姆	TDFN3x3-10JeI嘉泰姆	CMJeI嘉泰姆	2JeI嘉泰姆	1JeI嘉泰姆	2.7JeI嘉泰姆	6JeI嘉泰姆	1500JeI嘉泰姆	0.6JeI嘉泰姆	280JeI嘉泰姆	250JeI嘉泰姆	500JeI嘉泰姆
  CXSD62129AJeI嘉泰姆	TDFN3x3-10JeI嘉泰姆	CMJeI嘉泰姆	2JeI嘉泰姆	1JeI嘉泰姆	2.7JeI嘉泰姆	6JeI嘉泰姆	1500JeI嘉泰姆	0.6JeI嘉泰姆	280JeI嘉泰姆	250JeI嘉泰姆
  CXSD62130JeI嘉泰姆	TDFN2x2-6JeI嘉泰姆	CMJeI嘉泰姆	1JeI嘉泰姆	1JeI嘉泰姆	2.7JeI嘉泰姆	6JeI嘉泰姆	1500JeI嘉泰姆	0.6JeI嘉泰姆	280JeI嘉泰姆	250JeI嘉泰姆	25JeI嘉泰姆
  CXSD62130AJeI嘉泰姆	TDFN2x2-6JeI嘉泰姆	CMJeI嘉泰姆	1JeI嘉泰姆	1JeI嘉泰姆	2.7JeI嘉泰姆	6JeI嘉泰姆	1500JeI嘉泰姆	0.6JeI嘉泰姆	280JeI嘉泰姆	250JeI嘉泰姆
  CXSD62131JeI嘉泰姆	TDFN3x3-12JeI嘉泰姆	CMJeI嘉泰姆	2JeI嘉泰姆	1JeI嘉泰姆	2.7JeI嘉泰姆	6JeI嘉泰姆	1500JeI嘉泰姆	0.6JeI嘉泰姆	280JeI嘉泰姆	250JeI嘉泰姆	25JeI嘉泰姆
  CXSD62131AJeI嘉泰姆	TDFN3x3-12JeI嘉泰姆	CMJeI嘉泰姆	2JeI嘉泰姆	1JeI嘉泰姆	2.7JeI嘉泰姆	6JeI嘉泰姆	1500JeI嘉泰姆	0.6JeI嘉泰姆	280JeI嘉泰姆	250JeI嘉泰姆
  CXSD62131CJeI嘉泰姆	TDFN 3x3 12JeI嘉泰姆	CMJeI嘉泰姆	2JeI嘉泰姆	1JeI嘉泰姆	3JeI嘉泰姆	5.5JeI嘉泰姆	1500JeI嘉泰姆	0.6JeI嘉泰姆	280JeI嘉泰姆	250JeI嘉泰姆	30JeI嘉泰姆
  CXSD62132JeI嘉泰姆	TQFN3x3-20JeI嘉泰姆	CMJeI嘉泰姆	3JeI嘉泰姆	2JeI嘉泰姆	2.9JeI嘉泰姆	5.5JeI嘉泰姆	1500JeI嘉泰姆	0.6JeI嘉泰姆	-JeI嘉泰姆	-JeI嘉泰姆	300JeI嘉泰姆
  CXSD62133JeI嘉泰姆	TDFN2x2-8JeI嘉泰姆	CMJeI嘉泰姆	1JeI嘉泰姆	1JeI嘉泰姆	3.3JeI嘉泰姆	8JeI嘉泰姆	1500JeI嘉泰姆	0.6JeI嘉泰姆	280JeI嘉泰姆	250JeI嘉泰姆	25JeI嘉泰姆
  CXSD62134JeI嘉泰姆	SOP-8JeI嘉泰姆	CMJeI嘉泰姆	1JeI嘉泰姆	2JeI嘉泰姆	4.5JeI嘉泰姆	24JeI嘉泰姆	340JeI嘉泰姆	0.925JeI嘉泰姆	110JeI嘉泰姆	110JeI嘉泰姆	1900JeI嘉泰姆
  CXSD62135JeI嘉泰姆	SOP-8PJeI嘉泰姆	CMJeI嘉泰姆	1JeI嘉泰姆	3JeI嘉泰姆	4.5JeI嘉泰姆	24JeI嘉泰姆	340JeI嘉泰姆	0.925JeI嘉泰姆	110JeI嘉泰姆	110JeI嘉泰姆

共有条评论 用户名: 密码: 验证码: 匿名发表