CXSD6289

CXSD6289该设备需要12伏和5伏电源。如果电源不可用,设备可提供可选的并联调节器
5V电源为5.8V。两个输出都有独立的软启动和启用SS/EN管脚上组合的功能。从每个
SS/EN插脚接地,设置软启动时间,拉动SS/EN引脚电压低于1V以禁用调节器。该装置还提供180°相位在OUT1和OUT2之间切换功能。

CXSD6289两个同步降压型脉宽调制控制器脉冲宽度调制控制器设计用于同步驱动两个N通道mosfet buck拓扑

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产品订购

产品简介

目录X7C嘉泰姆

1.产品概述                       2.产品特点X7C嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 X7C嘉泰姆
5.产品封装图                     6.电路原理图                   X7C嘉泰姆
7.功能概述                        8.相关产品X7C嘉泰姆

一,产品概述(General Description)      X7C嘉泰姆


          The CXSD6289 has two synchronous buck PWM control-lers with highX7C嘉泰姆
precision internal references voltage to of-fer accurate outputs. The PWMX7C嘉泰姆
controllers are designed to drive two N-channel MOSFETs in synchronousX7C嘉泰姆
buck topology. The device requires 12V and 5V power supplies.If the 5VX7C嘉泰姆
supply is not available, the device can offer an optional shunt regulatorX7C嘉泰姆
5.8V for 5V supply.Both outputs have independent soft-start and enableX7C嘉泰姆
func-tions combined on the SS/EN pin. Connecting a capaci-tor from eachX7C嘉泰姆
SS/EN pin to the ground for setting the soft-start time, and pulling the SS/ENX7C嘉泰姆
pin voltage below 1V to disable regulator. The device also offers 180°phaseX7C嘉泰姆
shift function between OUT1 and OUT2.The default switching frequency isX7C嘉泰姆
300kHz (keep the FS pin open or short to GND), and the device also providesX7C嘉泰姆
the programmable switching frequency function to ad-just the switching frequencyX7C嘉泰姆
from 70kHz to 800kHz. Con-necting a resistor from FS pin to GND increases theX7C嘉泰姆
switching frequency. Conversely, connecting a resistor from FS pin to VCC12X7C嘉泰姆
decreases the switching frequency.There is no current sensing or under-voltageX7C嘉泰姆
sensing on the CXSD6289. However, it provides a simple short-circuit protection by monitoring the COMP1 pin and COMP2 pin for over-voltage. When any of two pinsX7C嘉泰姆
exceed their trip point and the condition keeps for 1-2 internal clock cycles (3-6us atX7C嘉泰姆
300kHz), all regulators are latched off.X7C嘉泰姆
二.产品特点(Features)X7C嘉泰姆


1.)Two Synchronous Buck Converters(OUT1,OUT2)X7C嘉泰姆
2.)Converter Input Voltage Range up to 12VX7C嘉泰姆
3.)0.6V Reference for OUT1 with 0.8% AccuracyX7C嘉泰姆
4.)3.3V Reference for OUT2 with 0.8% AccuracyX7C嘉泰姆
5.)Both Outputs have Independent Soft-Start andX7C嘉泰姆
    Enable FunctionsX7C嘉泰姆
6.)Internal 300kHz Oscillator and ProgrammableX7C嘉泰姆
    Frequency Range from 70 kHz to 800kHzX7C嘉泰姆
7.)180 Degrees Phase Shift etween OUT1 and OUT2X7C嘉泰姆
8.)Short-Circuit ProtectionX7C嘉泰姆
9.)Thermally Enhanced SOP-20 PackageX7C嘉泰姆
10.)Lead Free and Green Devices AvailableX7C嘉泰姆
(RoHS Compliant)X7C嘉泰姆
三,应用范围 (Applications)X7C嘉泰姆


Graphic CardsX7C嘉泰姆
Low-Voltage Distributed Power SuppliesX7C嘉泰姆
SMPS ApplicationX7C嘉泰姆
四.下载产品资料PDF文档 X7C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X7C嘉泰姆

 QQ截图20160419174301.jpgX7C嘉泰姆

五,产品封装图 (Package)X7C嘉泰姆
blob.pngX7C嘉泰姆

六.电路原理图X7C嘉泰姆


blob.pngX7C嘉泰姆
七,功能概述X7C嘉泰姆


Output Inductor Selection (Cont.)X7C嘉泰姆
Where Fs is the switching frequency of the regulator. Al-though increase the inductor value and frequencyX7C嘉泰姆
reduce the ripple current and voltage, but there is a tradeoff ex-ists between the inductor’s ripple current andX7C嘉泰姆
the regula-tor load transient response time.A smaller inductor will give the regulator a faster load transientX7C嘉泰姆
response at the expense of higher ripple current.Increasing the switching frequency (FS) also reduces theX7C嘉泰姆
ripple current and voltage, but it will increase the switch-ing loss of the MOSFET and the power dissipationX7C嘉泰姆
of the converter. The maximum ripple current occurs at the maximum input voltage. A good starting point isX7C嘉泰姆
to choose the ripple current to be approximately 30% of the maxi-mum output current.Once the inductanceX7C嘉泰姆
value has been chosen, select an inductor that is capable of carrying the required peak cur-rent without goingX7C嘉泰姆
into saturation. In some types of inductors, especially core that is made of ferrite, the ripple current will increaseX7C嘉泰姆
abruptly when it saturates. This will result in a larger output ripple voltage.X7C嘉泰姆
Output Capacitor SelectionX7C嘉泰姆
Higher Capacitor value and lower ESR reduce the output ripple and the load transient drop. Therefore select highX7C嘉泰姆
performance low ESR capacitors that are intended for switching regulator applications. In some applications,X7C嘉泰姆
multiple capacitors have to be parallel to achieve the de-sired ESR value. A small decoupling capacitor in parallelX7C嘉泰姆
for bypassing the noise is also recommended, and the voltage rating of the output capacitors are also must beX7C嘉泰姆
considered. If tantalum capacitors are used, make sure they are surge tested by the manufactures. If in doubt,X7C嘉泰姆
consult the capacitors manufacturer.X7C嘉泰姆
Input Capacitor SelectionX7C嘉泰姆
The input capacitor is chosen based on the voltage rating and the RMS current rating. For reliable operation, X7C嘉泰姆

select the capacitor voltage rating to be at least 1.3 times higher than the maximum input voltage.X7C嘉泰姆
The maximum RMS current rating requirement is approxi-mately IOUT/2, where IOUT is the load current. X7C嘉泰姆

During power up, the input capacitors have to handle large amount of surge current. If tantalum capacitors X7C嘉泰姆

are used, make sure they are surge tested by the manufactures. If in doubt, consult the capacitors X7C嘉泰姆

manufacturer. For high frequency decoupling, a ceramic capacitor 1uF can be connected between the X7C嘉泰姆

drain of upper MOSFET and the source of lower MOSFETX7C嘉泰姆
MOSFET SelectionX7C嘉泰姆
The selection of the N-channel power MOSFETs are de-termined by the RDS(ON), reverse transfer X7C嘉泰姆

capacitance (CRSS) and maximum output current requirement. The losses in the MOSFETs have X7C嘉泰姆

two components: conduction loss and transition loss. For the upper and lower MOSFET, the X7C嘉泰姆

losses are approximately given by the following :X7C嘉泰姆
PUPPER=IOUT(1+TC)(RDS(ON))D+(0.5)(IOUT)(VIN)(tSW)FSX7C嘉泰姆
PLOWER=IOUT(1+TC)(RDS(ON))(1-D)X7C嘉泰姆
Where I is the load current OUT TC is the temperature dependency of RDS(ON) F is the switchingX7C嘉泰姆

 frequency St is the switching interval sw D is the duty cycle Note that both MOSFETs have X7C嘉泰姆

conduction losses while the upper MOSFET include an additional transition loss.The switching X7C嘉泰姆

internal, tsw, is a function of the reverse transfer capacitance CRSS. The (1+TC) term is to X7C嘉泰姆

factor in the temperature depen-dency of the RDS(ON) and can be extracted from the “RDS(ON)X7C嘉泰姆
vs Temperature” curve of the power MOSFET.X7C嘉泰姆
Short Circuit ProtectionX7C嘉泰姆
The CXSD6289 provides a simple short circuit protection function, and it is not easy to predict itsX7C嘉泰姆

 performance, since many factors can affect how well it works. Therefore, the limitations and X7C嘉泰姆

suggestions of this method must be pro-vided for users to understand how to work it well.TheX7C嘉泰姆

 short circuit protection was not designed to work for the output in initial short condition. In this X7C嘉泰姆

case, the short circuit protection may not work, and damage the MOSFETs. If the circuit still works,X7C嘉泰姆

 remove the short can cause an inductive kick on the phase pin, and it may damage the IC and X7C嘉泰姆

MOSFETs.  If the resistance of the short is not low enough to cause protection, the regulator willX7C嘉泰姆

 work as the load hasX7C嘉泰姆

Short Circuit Protection (Cont.)X7C嘉泰姆
increased, and continue to regulate up until the MOSFETs is damaged. The resistance of the shortX7C嘉泰姆

 should include wiring, PCB traces, contact resistances, and all of the return paths.The higher duty X7C嘉泰姆

cycle will give a higher COMP voltage level, and it is easy to touch the trip point. The compensa-X7C嘉泰姆
tion components also affect the response of COMP voltage; smaller caps may give a faster response.X7C嘉泰姆
The output current has faster rising time during short;the COMP pin will have a sharp rise. However,X7C嘉泰姆

 if the cur-rent rises too fast, it may cause a false trip. The output capacitance and its ESR can affectX7C嘉泰姆

 the rising time of the current during short.X7C嘉泰姆

八,相关产品                 更多同类产品......X7C嘉泰姆


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tectuX7C嘉泰姆

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(uA) X7C嘉泰姆

minX7C嘉泰姆

maxX7C嘉泰姆

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VM    X7C嘉泰姆

1   X7C嘉泰姆

1     X7C嘉泰姆

30X7C嘉泰姆

2.9    X7C嘉泰姆

13.2X7C嘉泰姆

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12     X7C嘉泰姆

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13.2 X7C嘉泰姆

0.8X7C嘉泰姆

12X7C嘉泰姆

5000X7C嘉泰姆

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VMX7C嘉泰姆

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1X7C嘉泰姆

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2.9X7C嘉泰姆

13.2X7C嘉泰姆

0.8X7C嘉泰姆

12X7C嘉泰姆

5000X7C嘉泰姆

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2.2X7C嘉泰姆

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0.8X7C嘉泰姆

5~12X7C嘉泰姆

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2100X7C嘉泰姆

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1X7C嘉泰姆

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13.2X7C嘉泰姆

1.25|0.8X7C嘉泰姆

5~12X7C嘉泰姆

3000X7C嘉泰姆

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SOP-8X7C嘉泰姆

VMX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

10X7C嘉泰姆

3.3X7C嘉泰姆

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0.8X7C嘉泰姆

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1X7C嘉泰姆

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2000X7C嘉泰姆

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|QFN5x5-32X7C嘉泰姆

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0.6X7C嘉泰姆

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2500X7C嘉泰姆

CXSD6296A|B|C|DX7C嘉泰姆

SOP8PX7C嘉泰姆

VMX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

25X7C嘉泰姆

3X7C嘉泰姆

13.2X7C嘉泰姆

0.6|0.8X7C嘉泰姆

5~12X7C嘉泰姆

1200X7C嘉泰姆

CXSD6297X7C嘉泰姆

TDFN3x3-10X7C嘉泰姆

VMX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

25X7C嘉泰姆

4X7C嘉泰姆

13.2X7C嘉泰姆

0.8X7C嘉泰姆

5~12X7C嘉泰姆

2000X7C嘉泰姆

CXSD6298X7C嘉泰姆

TDFN3x3-10X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

25X7C嘉泰姆

4.5X7C嘉泰姆

25X7C嘉泰姆

0.6X7C嘉泰姆

5~12X7C嘉泰姆

80X7C嘉泰姆

CXSD6299|AX7C嘉泰姆

SOP-8PX7C嘉泰姆

VMX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

25X7C嘉泰姆

4.5X7C嘉泰姆

13.2X7C嘉泰姆

0.8X7C嘉泰姆

5~12X7C嘉泰姆

16000X7C嘉泰姆

CXSD62100X7C嘉泰姆

TQFN3x3-10X7C嘉泰姆

VMX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

25X7C嘉泰姆

4.5X7C嘉泰姆

13.2X7C嘉泰姆

0.6X7C嘉泰姆

5~12X7C嘉泰姆

2500X7C嘉泰姆

CXSD62101|LX7C嘉泰姆

TDFN3x3-10X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

30X7C嘉泰姆

3X7C嘉泰姆

25X7C嘉泰姆

0.8X7C嘉泰姆

5~12X7C嘉泰姆

2000X7C嘉泰姆

CXSD62102X7C嘉泰姆

TQFN3x3-16X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

30X7C嘉泰姆

1.8X7C嘉泰姆

28X7C嘉泰姆

0.6X7C嘉泰姆

5X7C嘉泰姆

600X7C嘉泰姆

CXSD62102AX7C嘉泰姆

TQFN 3x3 16X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

30X7C嘉泰姆

1.8X7C嘉泰姆

28X7C嘉泰姆

0.6X7C嘉泰姆

5X7C嘉泰姆

600X7C嘉泰姆

CXSD62103X7C嘉泰姆

QFN4x4-24X7C嘉泰姆

VMX7C嘉泰姆

2X7C嘉泰姆

1X7C嘉泰姆

50X7C嘉泰姆

4.5X7C嘉泰姆

13.2X7C嘉泰姆

0.6X7C嘉泰姆

5~12X7C嘉泰姆

5000X7C嘉泰姆

CXSD62104X7C嘉泰姆

TQFN4x4-24X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

2X7C嘉泰姆

15X7C嘉泰姆

6X7C嘉泰姆

25X7C嘉泰姆

2X7C嘉泰姆

NX7C嘉泰姆

550X7C嘉泰姆

CXSD62105X7C嘉泰姆

TQFN4x4-24X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

2X7C嘉泰姆

15X7C嘉泰姆

6X7C嘉泰姆

25X7C嘉泰姆

2X7C嘉泰姆

NX7C嘉泰姆

550X7C嘉泰姆

CXSD62106|AX7C嘉泰姆

TQFN4x4-4X7C嘉泰姆

TQFN3x3-20X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

2X7C嘉泰姆

20X7C嘉泰姆

3X7C嘉泰姆

28X7C嘉泰姆

0.75X7C嘉泰姆

5X7C嘉泰姆

800X7C嘉泰姆

CXSD62107X7C嘉泰姆

TQFN3x3-16X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

20X7C嘉泰姆

1.8X7C嘉泰姆

28X7C嘉泰姆

0.75X7C嘉泰姆

5X7C嘉泰姆

400X7C嘉泰姆

CXSD62108X7C嘉泰姆

QFN3.5x3.5-14X7C嘉泰姆

TQFN3x3-16X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

20X7C嘉泰姆

1.8X7C嘉泰姆

28X7C嘉泰姆

0.75X7C嘉泰姆

5X7C嘉泰姆

400X7C嘉泰姆

CXSD62109X7C嘉泰姆

TQFN3x3-16X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

2X7C嘉泰姆

20X7C嘉泰姆

1.8X7C嘉泰姆

28X7C嘉泰姆

0.75X7C嘉泰姆

5X7C嘉泰姆

400X7C嘉泰姆

CXSD62110X7C嘉泰姆

QFN3x3-20X7C嘉泰姆

TQFN3x3-16X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

2X7C嘉泰姆

20X7C嘉泰姆

3X7C嘉泰姆

28X7C嘉泰姆

1.8|1.5|0.5X7C嘉泰姆

5X7C嘉泰姆

740X7C嘉泰姆

CXSD62111X7C嘉泰姆

TQFN4x4-24X7C嘉泰姆

|QFN3x3-20X7C嘉泰姆

CMX7C嘉泰姆

1X7C嘉泰姆

2X7C嘉泰姆

15X7C嘉泰姆

5X7C嘉泰姆

28X7C嘉泰姆

0.5X7C嘉泰姆

NX7C嘉泰姆

3000X7C嘉泰姆

CXSD62112X7C嘉泰姆

TDFN3x3-10X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

20X7C嘉泰姆

1.8X7C嘉泰姆

28X7C嘉泰姆

0.5X7C嘉泰姆

5X7C嘉泰姆

250X7C嘉泰姆

CXSD62113|CX7C嘉泰姆

TQFN3x3-20X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

2X7C嘉泰姆

15X7C嘉泰姆

6X7C嘉泰姆

25X7C嘉泰姆

2X7C嘉泰姆

NX7C嘉泰姆

550X7C嘉泰姆

CXSD62113EX7C嘉泰姆

TQFN 3x3 20X7C嘉泰姆

COTX7C嘉泰姆

2X7C嘉泰姆

2X7C嘉泰姆

11X7C嘉泰姆

6X7C嘉泰姆

25X7C嘉泰姆

2X7C嘉泰姆

NX7C嘉泰姆

550X7C嘉泰姆

CXSD62114X7C嘉泰姆

TQFN3x3-20X7C嘉泰姆

COTX7C嘉泰姆

2X7C嘉泰姆

2X7C嘉泰姆

11X7C嘉泰姆

5.5X7C嘉泰姆

25X7C嘉泰姆

2X7C嘉泰姆

NX7C嘉泰姆

280X7C嘉泰姆

CXSD62115X7C嘉泰姆

QFN4x4-24X7C嘉泰姆

VMX7C嘉泰姆

2X7C嘉泰姆

1X7C嘉泰姆

60X7C嘉泰姆

3.1X7C嘉泰姆

13.2X7C嘉泰姆

0.85X7C嘉泰姆

12X7C嘉泰姆

5000X7C嘉泰姆

CXSD62116A|B|CX7C嘉泰姆

SOP-8PX7C嘉泰姆

VMX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

20X7C嘉泰姆

2.9X7C嘉泰姆

13.2X7C嘉泰姆

0.8X7C嘉泰姆

12X7C嘉泰姆

16000X7C嘉泰姆

CXSD62117X7C嘉泰姆

SOP-20X7C嘉泰姆

VMX7C嘉泰姆

2X7C嘉泰姆

2X7C嘉泰姆

30X7C嘉泰姆

10X7C嘉泰姆

13.2X7C嘉泰姆

1X7C嘉泰姆

12X7C嘉泰姆

5000X7C嘉泰姆

CXSD62118X7C嘉泰姆

TDFN3x3-10X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

1X7C嘉泰姆

25X7C嘉泰姆

1.8X7C嘉泰姆

28X7C嘉泰姆

0.7X7C嘉泰姆

5X7C嘉泰姆

250X7C嘉泰姆

CXSD62119X7C嘉泰姆

TQFN3x3-20X7C嘉泰姆

COTX7C嘉泰姆

2X7C嘉泰姆

1X7C嘉泰姆

40X7C嘉泰姆

1.8X7C嘉泰姆

25X7C嘉泰姆

REFIN SettingX7C嘉泰姆

5X7C嘉泰姆

700X7C嘉泰姆

CXSD62120X7C嘉泰姆

QFN 3x3 20X7C嘉泰姆

TQFN 3x3 16X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

2X7C嘉泰姆

20X7C嘉泰姆

3X7C嘉泰姆

28X7C嘉泰姆

1.8|1.5 1.35|1.2 0.5X7C嘉泰姆

5X7C嘉泰姆

800X7C嘉泰姆

CXSD62121AX7C嘉泰姆

TQFN3x3 20X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

2X7C嘉泰姆

15X7C嘉泰姆

3X7C嘉泰姆

28X7C嘉泰姆

0.75X7C嘉泰姆

5X7C嘉泰姆

220X7C嘉泰姆

CXSD62121BX7C嘉泰姆

TQFN3x3 20X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

2X7C嘉泰姆

15X7C嘉泰姆

3X7C嘉泰姆

28X7C嘉泰姆

0.75X7C嘉泰姆

5X7C嘉泰姆

220X7C嘉泰姆

CXSD62121X7C嘉泰姆

TQFN3x3-20X7C嘉泰姆

COTX7C嘉泰姆

1X7C嘉泰姆

2X7C嘉泰姆

20X7C嘉泰姆

3X7C嘉泰姆

28X7C嘉泰姆

0.75X7C嘉泰姆

5X7C嘉泰姆

180 X7C嘉泰姆

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