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首页 > 产品中心 > 电源管理 > DC降压型芯片 > Buck降压型芯片 >CXSD6288双通道恒定时间和同步的PWM控制器每个通道驱动双N通道MOSFET功率因数调制或脉宽调制模式下瞬态响应和精确的直流电压输出
CXSD6288双通道恒定时间和同步的PWM控制器每个通道驱动双N通道MOSFET功率因数调制或脉宽调制模式下瞬态响应和精确的直流电压输出
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CXSD6288在功率因数调制或脉宽调制模式下都能提供出色的瞬态响应和精确的直流电压输出。在PFM模式下,TMA7108通过加载模块在轻到重负载上提供非常高的效率-
相关开关频率。为了达到低噪声的要求,强制PWM模式几乎在恒定频率下工作。

CXSD6288双通道恒定时间和同步的PWM控制器每个通道驱动双N通道MOSFET功率因数调制或脉宽调制模式下瞬态响应和精确的直流电压输出
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产品简介

目录yRu嘉泰姆

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

一,产品概述(General Description)   yRu嘉泰姆


       The CXSD6288 is a dual-channel, constant on-time, and yRu嘉泰姆
synchronous PWM controller which drives dual N-channel MOSFETsyRu嘉泰姆
for each channel. The CXSD6288 steps down high voltage of a batteryyRu嘉泰姆
to generate low-voltage chipset or RAM supplies in notebook computers.yRu嘉泰姆
The CXSD6288 provides excellent transient response and accurate DC voltage output in either PFM or PWM mode. In PFM mode, the CXSD6288 provides very high efficiency over light to heavy loads with loading-modu-yRu嘉泰姆
lated switching frequencies. The Forced-PWM mode works nearly at constant frequency for low-noise requirements.yRu嘉泰姆
        The CXSD6288 is equipped with accurate current-limit,output under-voltag, and output over-voltage protections,perfect for NB applications. A Power-On-Reset function monitors the voltage on V CC to prevent wrong opera-tion during power on. A soft-start ramps up the output voltage with programmable slew rate to reduce the start-up current. A soft-stop  function actively discharges the output capacitors with controlled reverse inductor current. At the end of the soft-stop, the CXSD6288 forces yRu嘉泰姆
LGATE high to prevent over-voltage in shutdown. The CXSD6288 has individual enable controls for each channel. Pulling both EN pin low shuts down the whole chip with low quiescent current close to zero.yRu嘉泰姆
        The CXSD6288 is available in SSOP-28 and QFN4x4-24 packages.yRu嘉泰姆
二.产品特点(Features)yRu嘉泰姆


1.)Adjustable Output Voltage up to 5.5VyRu嘉泰姆
       - 0.9V Reference VoltageyRu嘉泰姆
       - ±1% Accuracy Over TemperatureyRu嘉泰姆
2.)Operates from an Input Battery Voltage Range ofyRu嘉泰姆
3.)5V to 24V or from 3.3V/5V System RailyRu嘉泰姆
4.)Power-On-Reset Monitoring on VCC PinyRu嘉泰姆
     Selectable Forced PWM or Automatic PFM/PWM ModeyRu嘉泰姆
5.)Constant-On-Time Control SchemeyRu嘉泰姆
     - Switching Frequency Compensation for PWM ModeyRu嘉泰姆
     - Constant Switching Frequency (CH1: 345kHz,yRu嘉泰姆
    CH2: 255KHz) in PWM Mode with DC Output CurrentyRu嘉泰姆
6.)Excellent Line and Load Transient ResponsesyRu嘉泰姆
7.)Adjustable Soft-Start and Soft-StopyRu嘉泰姆
8.)Power-Good Outputs for both ChannelsyRu嘉泰姆
9.)Adjustable Current-Limit ProtectionyRu嘉泰姆
     - Using Sense Resistor or MOSFET’s RDS(ON)yRu嘉泰姆
10.)115% Over-Voltage ProtectionyRu嘉泰姆
- No Negative Output Voltage OccurredyRu嘉泰姆
11.)70% Under-Voltage ProtectionyRu嘉泰姆
12.)Adaptive Dead-Time ControlyRu嘉泰姆
     - Sensing G-to-S Voltage of Power MOSFETsyRu嘉泰姆
13.)Shutdown Control for both ChannelsyRu嘉泰姆
14.)28-pin SSOP (SSOP-28) and 4mmx4mm 24-leadyRu嘉泰姆
       QFN (QFN4x4-24) PackagesyRu嘉泰姆
15.)Lead Free and Green Devices AvailableyRu嘉泰姆
三,应用范围 (Applications)yRu嘉泰姆


Note Book ComputersyRu嘉泰姆
      - Chipset/RAM Supplies as low as 0.9VyRu嘉泰姆
       - 1.8V and 2.5V SuppliesyRu嘉泰姆
   Step-Down Converters Requiring High EfficiencyyRu嘉泰姆
四.下载产品资料PDF文档 yRu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yRu嘉泰姆

 QQ截图20160419174301.jpgyRu嘉泰姆

五,产品封装图 (Package)yRu嘉泰姆


blob.pngyRu嘉泰姆

六.电路原理图yRu嘉泰姆


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七,功能概述yRu嘉泰姆


Layout Consideration (Cont.)yRu嘉泰姆
· Keep the switching nodes (UGATEx, LGATEx, BOOTx,PHASEx, and ISENx) away from sensitive small sig-yRu嘉泰姆
nal nodes since these nodes are fast moving signals.Therefore, keep traces to these nodes as short asyRu嘉泰姆
possible and there should be no other weak signal traces in parallel with theses traces on any layer.yRu嘉泰姆
· The signals going through theses traces have both high dv/dt and high di/dt, with high peak charging andyRu嘉泰姆
discharging current. The traces from the gate drivers to the MOSFETs (UGATEx and LGATEx) should be shortyRu嘉泰姆
and wide.yRu嘉泰姆
· Place the source of the high-side MOSFET and the drain of the low-side MOSFET as close as possible.yRu嘉泰姆
Minimizing the impedance with wide layout plane between the two pads reduces the voltage bounce ofyRu嘉泰姆
the node.yRu嘉泰姆
· The ISENx trace should be a separate trace, and independently go to the drain terminal of the low-sideyRu嘉泰姆
MOSFET. The current sense resistor should be close to ISENx pin. The loop formed by the bottom MOSFET,yRu嘉泰姆
output inductor, and output capacitor, should be very small. The source of the bottom MOSFET should tieyRu嘉泰姆
to the negative side of the output capacitor in order for the ISENx pin to get the voltage drop on the RDS(ON).yRu嘉泰姆
· Decoupling capacitor, compensation component,the resistor dividers, boot capacitors, and soft-startyRu嘉泰姆
capacitors should be close their pins. (For example,place the decoupling ceramic capacitor near the drainyRu嘉泰姆
of the high-side MOSFET as close as possible. The bulk capacitors are also placed near the drain).yRu嘉泰姆
· The input capacitor should be near the drain of the high-side MOSFET; the high quality ceramicyRu嘉泰姆
decoupling capacitor can be put close to the VCC and GND pins; the output capacitor should be near theyRu嘉泰姆
loads. The input capacitor GND should be close to the output capacitor GND and the low-side MOSFETyRu嘉泰姆
GND.yRu嘉泰姆
· The drain of the MOSFETs (VIN and PHASEx nodes) should be a large plane for heat sinking. AndyRu嘉泰姆
PHASEx pin traces are also the return path for UGATEx. Connect these pins to the respectiveyRu嘉泰姆
converter’s high-side MOSFET source.yRu嘉泰姆
The CXSD6288 uses ripple mode control. Build the resistor divider close to the VSENx pin so that theyRu嘉泰姆
high impedance trace is shorter. The VSENx pin traces can’t be closed to the switching signal traces (UGATEx,yRu嘉泰姆
LGATEx, BOOTx, PHASEx, and ISENx).yRu嘉泰姆
The PGNDx trace should be a seperate trace, and inpendently go to the source of the low-side MOSFET.yRu嘉泰姆
For QFN4x4-24 package only, the thermal pad is the PGND of the dual channels. The sources of the bothyRu嘉泰姆
channels’ low-side MOSFETs should be near the PGND respectively.yRu嘉泰姆

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


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20yRu嘉泰姆

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24yRu嘉泰姆

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80yRu嘉泰姆

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13.2yRu嘉泰姆

0.8yRu嘉泰姆

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16000yRu嘉泰姆

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1yRu嘉泰姆

1yRu嘉泰姆

25yRu嘉泰姆

4.5yRu嘉泰姆

13.2yRu嘉泰姆

0.6yRu嘉泰姆

5~12yRu嘉泰姆

2500yRu嘉泰姆

CXSD62101|LyRu嘉泰姆

TDFN3x3-10yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

1yRu嘉泰姆

30yRu嘉泰姆

3yRu嘉泰姆

25yRu嘉泰姆

0.8yRu嘉泰姆

5~12yRu嘉泰姆

2000yRu嘉泰姆

CXSD62102yRu嘉泰姆

TQFN3x3-16yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

1yRu嘉泰姆

30yRu嘉泰姆

1.8yRu嘉泰姆

28yRu嘉泰姆

0.6yRu嘉泰姆

5yRu嘉泰姆

600yRu嘉泰姆

CXSD62102AyRu嘉泰姆

TQFN 3x3 16yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

1yRu嘉泰姆

30yRu嘉泰姆

1.8yRu嘉泰姆

28yRu嘉泰姆

0.6yRu嘉泰姆

5yRu嘉泰姆

600yRu嘉泰姆

CXSD62103yRu嘉泰姆

QFN4x4-24yRu嘉泰姆

VMyRu嘉泰姆

2yRu嘉泰姆

1yRu嘉泰姆

50yRu嘉泰姆

4.5yRu嘉泰姆

13.2yRu嘉泰姆

0.6yRu嘉泰姆

5~12yRu嘉泰姆

5000yRu嘉泰姆

CXSD62104yRu嘉泰姆

TQFN4x4-24yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

2yRu嘉泰姆

15yRu嘉泰姆

6yRu嘉泰姆

25yRu嘉泰姆

2yRu嘉泰姆

NyRu嘉泰姆

550yRu嘉泰姆

CXSD62105yRu嘉泰姆

TQFN4x4-24yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

2yRu嘉泰姆

15yRu嘉泰姆

6yRu嘉泰姆

25yRu嘉泰姆

2yRu嘉泰姆

NyRu嘉泰姆

550yRu嘉泰姆

CXSD62106|AyRu嘉泰姆

TQFN4x4-4yRu嘉泰姆

TQFN3x3-20yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

2yRu嘉泰姆

20yRu嘉泰姆

3yRu嘉泰姆

28yRu嘉泰姆

0.75yRu嘉泰姆

5yRu嘉泰姆

800yRu嘉泰姆

CXSD62107yRu嘉泰姆

TQFN3x3-16yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

1yRu嘉泰姆

20yRu嘉泰姆

1.8yRu嘉泰姆

28yRu嘉泰姆

0.75yRu嘉泰姆

5yRu嘉泰姆

400yRu嘉泰姆

CXSD62108yRu嘉泰姆

QFN3.5x3.5-14yRu嘉泰姆

TQFN3x3-16yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

1yRu嘉泰姆

20yRu嘉泰姆

1.8yRu嘉泰姆

28yRu嘉泰姆

0.75yRu嘉泰姆

5yRu嘉泰姆

400yRu嘉泰姆

CXSD62109yRu嘉泰姆

TQFN3x3-16yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

2yRu嘉泰姆

20yRu嘉泰姆

1.8yRu嘉泰姆

28yRu嘉泰姆

0.75yRu嘉泰姆

5yRu嘉泰姆

400yRu嘉泰姆

CXSD62110yRu嘉泰姆

QFN3x3-20yRu嘉泰姆

TQFN3x3-16yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

2yRu嘉泰姆

20yRu嘉泰姆

3yRu嘉泰姆

28yRu嘉泰姆

1.8|1.5|0.5yRu嘉泰姆

5yRu嘉泰姆

740yRu嘉泰姆

CXSD62111yRu嘉泰姆

TQFN4x4-24yRu嘉泰姆

|QFN3x3-20yRu嘉泰姆

CMyRu嘉泰姆

1yRu嘉泰姆

2yRu嘉泰姆

15yRu嘉泰姆

5yRu嘉泰姆

28yRu嘉泰姆

0.5yRu嘉泰姆

NyRu嘉泰姆

3000yRu嘉泰姆

CXSD62112yRu嘉泰姆

TDFN3x3-10yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

1yRu嘉泰姆

20yRu嘉泰姆

1.8yRu嘉泰姆

28yRu嘉泰姆

0.5yRu嘉泰姆

5yRu嘉泰姆

250yRu嘉泰姆

CXSD62113|CyRu嘉泰姆

TQFN3x3-20yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

2yRu嘉泰姆

15yRu嘉泰姆

6yRu嘉泰姆

25yRu嘉泰姆

2yRu嘉泰姆

NyRu嘉泰姆

550yRu嘉泰姆

CXSD62113EyRu嘉泰姆

TQFN 3x3 20yRu嘉泰姆

COTyRu嘉泰姆

2yRu嘉泰姆

2yRu嘉泰姆

11yRu嘉泰姆

6yRu嘉泰姆

25yRu嘉泰姆

2yRu嘉泰姆

NyRu嘉泰姆

550yRu嘉泰姆

CXSD62114yRu嘉泰姆

TQFN3x3-20yRu嘉泰姆

COTyRu嘉泰姆

2yRu嘉泰姆

2yRu嘉泰姆

11yRu嘉泰姆

5.5yRu嘉泰姆

25yRu嘉泰姆

2yRu嘉泰姆

NyRu嘉泰姆

280yRu嘉泰姆

CXSD62115yRu嘉泰姆

QFN4x4-24yRu嘉泰姆

VMyRu嘉泰姆

2yRu嘉泰姆

1yRu嘉泰姆

60yRu嘉泰姆

3.1yRu嘉泰姆

13.2yRu嘉泰姆

0.85yRu嘉泰姆

12yRu嘉泰姆

5000yRu嘉泰姆

CXSD62116A|B|CyRu嘉泰姆

SOP-8PyRu嘉泰姆

VMyRu嘉泰姆

1yRu嘉泰姆

1yRu嘉泰姆

20yRu嘉泰姆

2.9yRu嘉泰姆

13.2yRu嘉泰姆

0.8yRu嘉泰姆

12yRu嘉泰姆

16000yRu嘉泰姆

CXSD62117yRu嘉泰姆

SOP-20yRu嘉泰姆

VMyRu嘉泰姆

2yRu嘉泰姆

2yRu嘉泰姆

30yRu嘉泰姆

10yRu嘉泰姆

13.2yRu嘉泰姆

1yRu嘉泰姆

12yRu嘉泰姆

5000yRu嘉泰姆

CXSD62118yRu嘉泰姆

TDFN3x3-10yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

1yRu嘉泰姆

25yRu嘉泰姆

1.8yRu嘉泰姆

28yRu嘉泰姆

0.7yRu嘉泰姆

5yRu嘉泰姆

250yRu嘉泰姆

CXSD62119yRu嘉泰姆

TQFN3x3-20yRu嘉泰姆

COTyRu嘉泰姆

2yRu嘉泰姆

1yRu嘉泰姆

40yRu嘉泰姆

1.8yRu嘉泰姆

25yRu嘉泰姆

REFIN SettingyRu嘉泰姆

5yRu嘉泰姆

700yRu嘉泰姆

CXSD62120yRu嘉泰姆

QFN 3x3 20yRu嘉泰姆

TQFN 3x3 16yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

2yRu嘉泰姆

20yRu嘉泰姆

3yRu嘉泰姆

28yRu嘉泰姆

1.8|1.5 1.35|1.2 0.5yRu嘉泰姆

5yRu嘉泰姆

800yRu嘉泰姆

CXSD62121AyRu嘉泰姆

TQFN3x3 20yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

2yRu嘉泰姆

15yRu嘉泰姆

3yRu嘉泰姆

28yRu嘉泰姆

0.75yRu嘉泰姆

5yRu嘉泰姆

220yRu嘉泰姆

CXSD62121ByRu嘉泰姆

TQFN3x3 20yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

2yRu嘉泰姆

15yRu嘉泰姆

3yRu嘉泰姆

28yRu嘉泰姆

0.75yRu嘉泰姆

5yRu嘉泰姆

220yRu嘉泰姆

CXSD62121yRu嘉泰姆

TQFN3x3-20yRu嘉泰姆

COTyRu嘉泰姆

1yRu嘉泰姆

2yRu嘉泰姆

20yRu嘉泰姆

3yRu嘉泰姆

28yRu嘉泰姆

0.75yRu嘉泰姆

5yRu嘉泰姆

180yRu嘉泰姆

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