CXSD62159恒频电流模式开关稳压器PFM/PWM模式操作电流模式控制车辆识别号上电复位(POR)和欠电压锁定

发布时间:2020-04-29 17:48:06 浏览次数:302 作者:oumao18 来源:嘉泰姆
摘要:CXSD62159是一款集成了功率mosfet的2A同步降压变换器。设计采用电流模式控制方案,可将4.5V至24V的宽输入电压转换为0可调的输出电压。8V至20V,提供出色的输出电压调节。配备了自动PFM/PWM模式操作。在轻载时,集成电路以PFM模式工作以减少开关损耗。在大负载下,芯片工作在PWM模式
CXSD62159恒频电流模式开关稳压器PFM/PWM模式操作电流模式控制车辆识别号上电复位(POR)和欠电压锁定

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

一,产品概述(General Description)         aHv嘉泰姆

       CXSD62159 is a 2A synchronous buck converter with integrated power MOSFETs. The CXSD62159 design with a current-mode control scheme, can convert wide input voltage of 4.5V to 24V to the output voltage adjustable from 0. 8V to 20V to provide excellent output voltage regulation. The CXSD62159 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. The CXSD62159 is also equipped with Power-on-reset, softstart, soft-stop, and whole protections (under-voltage, over-temperature, and current-limit) into a single package. This device, available TDFN3x3-10, provides a very compact system solution external components and PCB areaaHv嘉泰姆

Main Control LoopaHv嘉泰姆

        The CXSD62159 is a constant frequency current mode switching regulator.aHv嘉泰姆
During normal operation, the internal N-channel power MOSFET is turned onaHv嘉泰姆
each cycle when the oscillator sets an internal RS latch and would be turnedaHv嘉泰姆
off when an internal current comparator (ICMP) resets the latch. The peakaHv嘉泰姆
inductor current at which ICMP resets the RS latch is controlled by the voltageaHv嘉泰姆
on the COMP pin, which is the output of the error amplifier (EAMP). An externalaHv嘉泰姆
resistive divider connected between VOUT and ground allows the EAMP toaHv嘉泰姆
receive an output feedback voltage VFB at FB pin. When the load currentaHv嘉泰姆
increases, it causes a slight decrease in VFB relative to the 0.8V reference,aHv嘉泰姆
which in turn causes the COMP voltage to increase until the average inductoraHv嘉泰姆
current matches the new load current.aHv嘉泰姆
VIN Power-On-Reset (POR) and EN Under-voltageLockoutaHv嘉泰姆
The CXSD62159 keep monitoring the voltage on VIN pin to prevent wrong logicaHv嘉泰姆
operations which may occur when VIN voltage is not high enough for the internalaHv嘉泰姆
control circuitry to operate. The VIN POR has a rising threshold of 4.05V (typical)aHv嘉泰姆
with 0.3V of hysteresis.An external under-voltage lockout (UVLO) is sensed ataHv嘉泰姆
the EN pin. The EN UVLO has a rising threshold of 2.5V with 0.2V of hysteresis.aHv嘉泰姆
The EN pin should be connected a resistor divider from VIN to EN .After the VINaHv嘉泰姆
and EN voltages exceed their respective voltage thresholds, the IC starts aaHv嘉泰姆
start-up process and then ramps up the output voltage to the setting of outputaHv嘉泰姆
voltage.aHv嘉泰姆
Over-Temperature Protection (OTP)aHv嘉泰姆
The over-temperature circuit limits the junction tempera ture of the CXSD62159aHv嘉泰姆
When the junction temperature exceeds TJ =+160oC, a thermal sensor turnsaHv嘉泰姆
off the power MOSFET, allowing the device to cool down. The thermal sensoraHv嘉泰姆
allows the converter to start a start-up process and regulate the output voltageaHv嘉泰姆
again after the junction temperature cools by 50oC.The OTP designed with a 50 oCaHv嘉泰姆
hysteresis lowers the average T J during c ontinuous thermal overload conditions,aHv嘉泰姆
increasing life time of the IC.aHv嘉泰姆
Enable/ShutdownaHv嘉泰姆
Driving EN to ground places the CXSD62159 in shutdown.When in shutdown, theaHv嘉泰姆
internal N-Channel power MOSFET turns off, all internal circuitry shuts down andaHv嘉泰姆
the quiescent supply current reduces to 0.3μA.aHv嘉泰姆
Current-Limit ProtectionaHv嘉泰姆
The CXSD62159 monitors the output current, flowing through the N-Channel poweraHv嘉泰姆
MOSFET, and limits the IC from damages during overload, short-circuit and over-aHv嘉泰姆
voltage conditions. aHv嘉泰姆
Frequency FoldbackaHv嘉泰姆
The foldback frequency is controlled by the FB voltage.When the FB pin voltageaHv嘉泰姆
is under 0.6V, the frequency of the oscillator will be reduced to 110kHz. This loweraHv嘉泰姆
frequency allows the inductor current to safely discharge,thereby preventing currentaHv嘉泰姆
runaway. The oscillator’s frequency will switch to its designed rate when the feedbackaHv嘉泰姆
voltage on FB rises above the rising frequency foldback threshold (0.6V, typical) again.aHv嘉泰姆
Over-Voltage ProtectionaHv嘉泰姆
The over-voltage function monitors the output voltage by FB pin. When the FB voltageaHv嘉泰姆
increase over 120% of the reference voltage, the over-voltage protection compara-aHv嘉泰姆
tor will force the high-and low-side MOSFET gate driver off. As soon as the outputaHv嘉泰姆
voltage is within regulation, the OVP comparator is disengaged. The chip will restore itsaHv嘉泰姆
normal operation.aHv嘉泰姆
二.产品特点(Features)aHv嘉泰姆
Wide Input Voltage from 4.5V to 24VaHv嘉泰姆
2A Continuous Output CurrentaHv嘉泰姆
Adjustable Output Voltage from 0.8V to 20VaHv嘉泰姆
Intergrated High/Low Side MOSFETaHv嘉泰姆
PFM/PWM mode OperationaHv嘉泰姆
Fixed 340kHz Switching FrequencyaHv嘉泰姆
Stable with Low ESR Ceramic Output CapacitorsaHv嘉泰姆
Power-On-Reset DetectionaHv嘉泰姆
Programmable Soft-StartaHv嘉泰姆
Over-Temperature ProtectionaHv嘉泰姆
Current-Limit Protection with Frequency FoldbackaHv嘉泰姆
Enable/Shutdown FunctionaHv嘉泰姆
Small TDFN3x3-10 PackagesaHv嘉泰姆
Lead Free and Green Devices Available (RoHS Compliant)aHv嘉泰姆
三,应用范围 (Applications) aHv嘉泰姆

LCD Monitor/TVaHv嘉泰姆

Set-Top BoxaHv嘉泰姆
DSL, Switch HUBaHv嘉泰姆
Notebook ComputeraHv嘉泰姆

四.下载产品资料PDF文档 aHv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aHv嘉泰姆

 QQ截图20160419174301.jpgaHv嘉泰姆

 aHv嘉泰姆

五,产品封装图 (Package)aHv嘉泰姆

blob.pngaHv嘉泰姆

六.电路原理图aHv嘉泰姆

blob.pngaHv嘉泰姆

七,功能概述aHv嘉泰姆


CXSD62159 is a 2A synchronous buck converter with integrated power MOSFETs. The CXSD62159 design with a cur-aHv嘉泰姆

rent-mode control scheme, can convert wide input voltage of 4.5V to 24V to the output voltage adjustable from 0.aHv嘉泰姆
8V to 20V to provide excellent output voltage regulation.The CXSD62159 is equipped with an automatic PFM/PWMaHv嘉泰姆
mode operation. At light load, the IC operates in the PFM mode to reduce the switching losses. At heavy load, theaHv嘉泰姆
IC works in PWM.aHv嘉泰姆
The CXSD62159 is also equipped with Power-on-reset, softstart, soft-stop, and whole protections (under-voltage,aHv嘉泰姆
over-temperature, and current-limit) into a single package.This device, available TDFN3x3-10, provides a very com-aHv嘉泰姆
pact system solution external components and PCB areaaHv嘉泰姆
八,相关产品            更多同类产品.......aHv嘉泰姆


Switching Regulator > Buck ConverteraHv嘉泰姆

 Part_No aHv嘉泰姆

 PackageaHv嘉泰姆

ArchitectuaHv嘉泰姆

No.ofaHv嘉泰姆

PWM aHv嘉泰姆

OutpuaHv嘉泰姆

DriveaHv嘉泰姆

LoutaHv嘉泰姆

(A) aHv嘉泰姆

Vin(V) aHv嘉泰姆

FmaxaHv嘉泰姆

Khz aHv嘉泰姆

Vref aHv嘉泰姆

(V) aHv嘉泰姆

R-Top (milohm) aHv嘉泰姆

R-Sync (milohm) aHv嘉泰姆

Iq (No load) (uA) aHv嘉泰姆

minaHv嘉泰姆

maxaHv嘉泰姆

CXSD62122aHv嘉泰姆

TQFN5x6-28aHv嘉泰姆

CMaHv嘉泰姆

1aHv嘉泰姆

5aHv嘉泰姆

4.5aHv嘉泰姆

26aHv嘉泰姆

380aHv嘉泰姆

0.8aHv嘉泰姆

50aHv嘉泰姆

20aHv嘉泰姆

1000aHv嘉泰姆

CXSD62123aHv嘉泰姆

SOP-8aHv嘉泰姆

CMaHv嘉泰姆

1aHv嘉泰姆

2aHv嘉泰姆

4.5aHv嘉泰姆

26aHv嘉泰姆

380aHv嘉泰姆

0.8aHv嘉泰姆

100aHv嘉泰姆

 

1000aHv嘉泰姆

CXSD62124aHv嘉泰姆

SOP-8PaHv嘉泰姆

CMaHv嘉泰姆

1aHv嘉泰姆

4aHv嘉泰姆

4.5aHv嘉泰姆

26aHv嘉泰姆

380aHv嘉泰姆

0.8aHv嘉泰姆

80aHv嘉泰姆

 

1000aHv嘉泰姆

CXSD62125aHv嘉泰姆

SOT23-5|TSOT23-5aHv嘉泰姆

CMaHv嘉泰姆

1aHv嘉泰姆

1aHv嘉泰姆

2.7aHv嘉泰姆

6aHv嘉泰姆

1500aHv嘉泰姆

0.6aHv嘉泰姆

280aHv嘉泰姆

250aHv嘉泰姆

25aHv嘉泰姆

CXSD62125AaHv嘉泰姆

SOT23-5aHv嘉泰姆

CMaHv嘉泰姆

1aHv嘉泰姆

1aHv嘉泰姆

2.7aHv嘉泰姆

6aHv嘉泰姆

1500aHv嘉泰姆

0.6aHv嘉泰姆

280aHv嘉泰姆

250aHv嘉泰姆

 

CXSD62126aHv嘉泰姆

SOP-8aHv嘉泰姆

CMaHv嘉泰姆

1aHv嘉泰姆

3aHv嘉泰姆

4.3aHv嘉泰姆

14aHv嘉泰姆

500aHv嘉泰姆

0.8aHv嘉泰姆

70aHv嘉泰姆

70aHv嘉泰姆

500aHv嘉泰姆

CXSD62127aHv嘉泰姆

SOP-8PaHv嘉泰姆

CMaHv嘉泰姆

1aHv嘉泰姆

3aHv嘉泰姆

4.3aHv嘉泰姆

14aHv嘉泰姆

500aHv嘉泰姆

0.8aHv嘉泰姆

55aHv嘉泰姆

45aHv嘉泰姆

500aHv嘉泰姆

CXSD62128BaHv嘉泰姆

TDFN3x3-10aHv嘉泰姆

   

3aHv嘉泰姆

2.6aHv嘉泰姆

5.5aHv嘉泰姆

2000aHv嘉泰姆

0.8aHv嘉泰姆

110aHv嘉泰姆

110aHv嘉泰姆

460aHv嘉泰姆

CXSD62129aHv嘉泰姆

TDFN3x3-10aHv嘉泰姆

CMaHv嘉泰姆

2aHv嘉泰姆

1aHv嘉泰姆

2.7aHv嘉泰姆

6aHv嘉泰姆

1500aHv嘉泰姆

0.6aHv嘉泰姆

280aHv嘉泰姆

250aHv嘉泰姆

500aHv嘉泰姆

CXSD62129AaHv嘉泰姆

TDFN3x3-10aHv嘉泰姆

CMaHv嘉泰姆

2aHv嘉泰姆

1aHv嘉泰姆

2.7aHv嘉泰姆

6aHv嘉泰姆

1500aHv嘉泰姆

0.6aHv嘉泰姆

280aHv嘉泰姆

250aHv嘉泰姆

 

CXSD62130aHv嘉泰姆

TDFN2x2-6aHv嘉泰姆

CMaHv嘉泰姆

1aHv嘉泰姆

1aHv嘉泰姆

2.7aHv嘉泰姆

6aHv嘉泰姆

1500aHv嘉泰姆

0.6aHv嘉泰姆

280aHv嘉泰姆

250aHv嘉泰姆

25aHv嘉泰姆

CXSD62130AaHv嘉泰姆

TDFN2x2-6aHv嘉泰姆

CMaHv嘉泰姆

1aHv嘉泰姆

1aHv嘉泰姆

2.7aHv嘉泰姆

6aHv嘉泰姆

1500aHv嘉泰姆

0.6aHv嘉泰姆

280aHv嘉泰姆

250aHv嘉泰姆

 

CXSD62131aHv嘉泰姆

TDFN3x3-12aHv嘉泰姆

CMaHv嘉泰姆

2aHv嘉泰姆

1aHv嘉泰姆

2.7aHv嘉泰姆

6aHv嘉泰姆

1500aHv嘉泰姆

0.6aHv嘉泰姆

280aHv嘉泰姆

250aHv嘉泰姆

25aHv嘉泰姆

CXSD62131AaHv嘉泰姆

TDFN3x3-12aHv嘉泰姆

CMaHv嘉泰姆

2aHv嘉泰姆

1aHv嘉泰姆

2.7aHv嘉泰姆

6aHv嘉泰姆

1500aHv嘉泰姆

0.6aHv嘉泰姆

280aHv嘉泰姆

250aHv嘉泰姆

 

CXSD62131CaHv嘉泰姆

TDFN 3x3 12aHv嘉泰姆

CMaHv嘉泰姆

2aHv嘉泰姆

1aHv嘉泰姆

3aHv嘉泰姆

5.5aHv嘉泰姆

1500aHv嘉泰姆

0.6aHv嘉泰姆

280aHv嘉泰姆

250aHv嘉泰姆

30aHv嘉泰姆

CXSD62132aHv嘉泰姆

TQFN3x3-20aHv嘉泰姆

CMaHv嘉泰姆

3aHv嘉泰姆

2aHv嘉泰姆

2.9aHv嘉泰姆

5.5aHv嘉泰姆

1500aHv嘉泰姆

0.6aHv嘉泰姆

-aHv嘉泰姆

-aHv嘉泰姆

300aHv嘉泰姆

CXSD62133aHv嘉泰姆

TDFN2x2-8aHv嘉泰姆

CMaHv嘉泰姆

1aHv嘉泰姆

1aHv嘉泰姆

3.3aHv嘉泰姆

8aHv嘉泰姆

1500aHv嘉泰姆

0.6aHv嘉泰姆

280aHv嘉泰姆

250aHv嘉泰姆

25aHv嘉泰姆

CXSD62134aHv嘉泰姆

SOP-8aHv嘉泰姆

CMaHv嘉泰姆

1aHv嘉泰姆

2aHv嘉泰姆

4.5aHv嘉泰姆

24aHv嘉泰姆

340aHv嘉泰姆

0.925aHv嘉泰姆

110aHv嘉泰姆

110aHv嘉泰姆

1900aHv嘉泰姆

CXSD62135aHv嘉泰姆

SOP-8PaHv嘉泰姆

发表评论

共有条评论
用户名: 密码:
验证码: 匿名发表