CXSD62102A

CXSD62102A降压在not中产生低压芯片组或RAM电源单相,恒定时间,同步PWM控制器,驱动N通道mosfet。CXSD62102A降压以在笔记本电脑中产生低压芯片组或RAM电源。

CXSD62102A单相定时同步的PWM控制器驱动N通道mosfet功率因数调制(PFM)或脉宽调制(PWM)模式下都能瞬态响应和准确的直流电压输出

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产品简介

目录Gc6嘉泰姆

1.产品概述                       2.产品特点Gc6嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 Gc6嘉泰姆
5.产品封装图                     6.电路原理图                   Gc6嘉泰姆
7.功能概述                        8.相关产品Gc6嘉泰姆

一,产品概述(General Description)    Gc6嘉泰姆


  The CXSD62102A is a single-phase, constant on-time,synchronous PWM controller, which drives N-channel MOSFETs. The CXSD62102A steps down high voltage to generate low-voltage chipset or RAM supplies in notebook computers.Gc6嘉泰姆
  The CXSD62102A provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode.In Pulse Frequency Mode (PFM), the CXSD62102A provides very high efficiency over light to heavy loads with loading-Gc6嘉泰姆
modulated switching frequencies. In PWM Mode, the converter works nearly at constant frequency for low-noise requirements.Gc6嘉泰姆
  The CXSD62102A is equipped with accurate positive current limit, output under-voltage, and output over-voltage protections, perfect for NB applications. The Power-On-Reset function monitors the voltage on VCC to prevent wrong operation during power-on. The CXSD62102A has a 1ms digital soft start and built-in an integrated output discharge device for soft stop. An internal integrated soft-Gc6嘉泰姆
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.Gc6嘉泰姆
  The CXSD62102A is available in 16pin TQFN3x3-16 package respectively.Gc6嘉泰姆
二.产品特点(Features)Gc6嘉泰姆


Adjustable Output Voltage from +0.6V to +3.3VGc6嘉泰姆
- 0.6V Reference VoltageGc6嘉泰姆
- ±0.6% Accuracy Over-TemperatureGc6嘉泰姆
Operates from An Input Battery Voltage Range ofGc6嘉泰姆
+1.8V to +28VGc6嘉泰姆
REFIN Function for Over-clocking Purpose fromGc6嘉泰姆
0.5V~2.5V rangeGc6嘉泰姆
Power-On-Reset Monitoring on VCC pinGc6嘉泰姆
Excellent line and load transient responsesGc6嘉泰姆
PFM mode for increased light load efficiencyGc6嘉泰姆
Programmable PWM Frequency from 100kHz to 500kHzGc6嘉泰姆
Built in 30A Output current driving capabilityGc6嘉泰姆
Integrate MOSFET DriversGc6嘉泰姆
Integrated Bootstrap Forward P-CH MOSFETGc6嘉泰姆
Power Good MonitoringGc6嘉泰姆
70% Under-Voltage ProtectionGc6嘉泰姆
125% Over-Voltage ProtectionGc6嘉泰姆
TQFN3x3-16 PackageGc6嘉泰姆
Lead Free and Green Devices Available (RoHS Compliant)Gc6嘉泰姆
三,应用范围 (Applications)Gc6嘉泰姆


NotebookGc6嘉泰姆
Table PCGc6嘉泰姆
Hand-Held PortableGc6嘉泰姆
AIO PCGc6嘉泰姆

四.下载产品资料PDF文档 Gc6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Gc6嘉泰姆

 QQ截图20160419174301.jpgGc6嘉泰姆

五,产品封装图 (Package)Gc6嘉泰姆


Gc6嘉泰姆

六.电路原理图Gc6嘉泰姆


blob.pngGc6嘉泰姆

七,功能概述Gc6嘉泰姆


Input Capacitor Selection (Cont.)Gc6嘉泰姆
higher than the maximum input voltage. The maximum RMS current rating requirement is approximately IOUT/2,Gc6嘉泰姆
where IOUT is the load current. During power-up, the input capacitors have to handle great amount of surge current.Gc6嘉泰姆
For low-duty notebook appliactions, ceramic capacitor is recommended. The capacitors must be connected be-Gc6嘉泰姆
tween the drain of high-side MOSFET and the source of low-side MOSFET with very low-impeadance PCB layout.Gc6嘉泰姆
MOSFET SelectionGc6嘉泰姆
The application for a notebook battery with a maximum voltage of 24V, at least a minimum 30V MOSFETs shouldGc6嘉泰姆
be used. The design has to trade off the gate charge with the RDS(ON) of the MOSFET:Gc6嘉泰姆
For the low-side MOSFET, before it is turned on, the body diode has been conducting. The low-side MOSFET driverGc6嘉泰姆
will not charge the miller capacitor of this MOSFET.In the turning off process of the low-side MOSFET, theGc6嘉泰姆
load current will shift to the body diode first. The high dv/dt of the phase node voltage will charge the miller capaci-Gc6嘉泰姆
tor through the low-side MOSFET driver sinking current path. This results in much less switching loss of the low-Gc6嘉泰姆
side MOSFETs. The duty cycle is often very small in high battery voltage applications, and the low-side MOSFETGc6嘉泰姆
will conduct most of the switching cycle; therefore, when using smaller RDS(ON) of the low-side MOSFET, the con-Gc6嘉泰姆
verter can reduce power loss. The gate charge for this MOSFET is usually the secondary consideration. TheGc6嘉泰姆
high-side MOSFET does not have this zero voltage switch-ing condition; in addition, it conducts for less time com-Gc6嘉泰姆
pared to the low-side MOSFET, so the switching loss tends to be dominant. Priority should be given to theGc6嘉泰姆
MOSFETs with less gate charge, so that both the gate driver loss and switching loss will be minimized.Gc6嘉泰姆
The selection of the N-channel power MOSFETs are determined by the R DS(ON), reversing transfer capaci-Gc6嘉泰姆
tance (CRSS) and maximum output current requirement.The losses in the MOSFETs have two components:Gc6嘉泰姆
conduction loss and transition loss. For the high-side and low-side MOSFETs, the losses are approximatelyGc6嘉泰姆
given by the following equations:Gc6嘉泰姆
Phigh-side = IOUT (1+ TC)(RDS(ON))D + (0.5)( IOUT)(VIN)( tSW)FSWGc6嘉泰姆
Plow-side = IOUT (1+ TC)(RDS(ON))(1-D)Gc6嘉泰姆
Where TC is the temperature dependency of RDS(ON)FSW is the switching frequencyGc6嘉泰姆
tSW is the switching interval D is the duty cycle Note that both MOSFETs have conduction losses whileGc6嘉泰姆
the high-side MOSFET includes an additional transition loss. The switching interval, tSW, is the function of the reverse transfer capacitance CRSS. The (1+TC) term is a factor in the temperature dependency of the RDS(ON) and can be extracted from the “RDS(ON) vs. Temperature” curve of the power MOSFETGc6嘉泰姆
Layout ConsiderationGc6嘉泰姆
In any high switching frequency converter, a correct layout is important to ensure proper operation of the regulator.Gc6嘉泰姆
With power devices switching at higher frequency, the resulting current transient will cause voltage spike acrossGc6嘉泰姆
the interconnecting impedance and parasitic circuit elements. As an example, consider the turn-off transitionGc6嘉泰姆
of the PWM MOSFET. Before turn-off condition, the MOSFET is carrying the full load current. During turn-off,Gc6嘉泰姆
current stops flowing in the MOSFET and is freewheeling by the low side MOSFET and parasitic diode. Any parasiticGc6嘉泰姆
inductance of the circuit generates a large voltage spike during the switching interval. In general, using short andGc6嘉泰姆
wide printed circuit traces should minimize interconnect- ing impedances and the magnitude of voltage spike.Gc6嘉泰姆
Besides, signal and power grounds are to be kept sepa- rating and finally combined using ground plane construc-Gc6嘉泰姆
tion or single point grounding. The best tie-point between the signal ground and the power ground is at the nega-Gc6嘉泰姆
tive side of the output capacitor on each channel, where there is less noise. Noisy traces beneath the IC are notGc6嘉泰姆
recommended. Below is a checklist for your layout:· Keep the switching nodes (UGATE, LGATE, BOOT,Gc6嘉泰姆
and PHASE) away from sensitive small signal nodes since these nodes are fast moving signals.Gc6嘉泰姆
Therefore, keep traces to these nodes as short asGc6嘉泰姆
side MOSFET. On the other hand, the PGND trace should be a separate trace and independently go toGc6嘉泰姆
the source of the low-side MOSFET. Besides, the cur-rent sense resistor should be close to OCSET pin toGc6嘉泰姆
avoid parasitic capacitor effect and noise coupling.Gc6嘉泰姆
· Decoupling capacitors, the resistor-divider, and boot capacitor should be close to their pins. (For example,Gc6嘉泰姆
place the decoupling ceramic capacitor close to the drain of the high-side MOSFET as close as possible.)Gc6嘉泰姆
· The input bulk capacitors should be close to the drain of the high-side MOSFET, and the output bulk capaci-Gc6嘉泰姆
tors should be close to the loads. The input capaci-tor’s ground should be close to the grounds of theGc6嘉泰姆
output capacitors and low-side MOSFET.Gc6嘉泰姆
· Locate the resistor-divider close to the FB pin to mini-mize the high impedance trace. In addition, FB pinGc6嘉泰姆
traces can’t be close to the switching signal traces (UGATE, LGATE, BOOT, and PHASE).Gc6嘉泰姆

Layout Consideration (Cont.)Gc6嘉泰姆

possible and there should be no other weak signal traces in parallel with theses traces on any layer.Gc6嘉泰姆
· The signals going through theses traces have both high dv/dt and high di/dt with high peak charging andGc6嘉泰姆
discharging current. The traces from the gate drivers to the MOSFETs (UGATE and LGATE) should be shortGc6嘉泰姆
and wide.Gc6嘉泰姆
· Place the source of the high-side MOSFET and the drain of the low-side MOSFET as close as possible.Gc6嘉泰姆
Minimizing the impedance with wide layout plane be-tween the two pads reduces the voltage bounce ofGc6嘉泰姆
the drain of the MOSFETs (VIN and PHASE nodes) can get better heat sinking.Gc6嘉泰姆

· The PGND is the current sensing circuit reference ground and also the power ground of the LGATE low-Gc6嘉泰姆

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VMGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

20Gc6嘉泰姆

3Gc6嘉泰姆

13.2Gc6嘉泰姆

0.8Gc6嘉泰姆

5~12Gc6嘉泰姆

2500Gc6嘉泰姆

CXSD6296A|B|C|DGc6嘉泰姆

SOP8PGc6嘉泰姆

VMGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

25Gc6嘉泰姆

3Gc6嘉泰姆

13.2Gc6嘉泰姆

0.6|0.8Gc6嘉泰姆

5~12Gc6嘉泰姆

1200Gc6嘉泰姆

CXSD6297Gc6嘉泰姆

TDFN3x3-10Gc6嘉泰姆

VMGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

25Gc6嘉泰姆

4Gc6嘉泰姆

13.2Gc6嘉泰姆

0.8Gc6嘉泰姆

5~12Gc6嘉泰姆

2000Gc6嘉泰姆

CXSD6298Gc6嘉泰姆

TDFN3x3-10Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

25Gc6嘉泰姆

4.5Gc6嘉泰姆

25Gc6嘉泰姆

0.6Gc6嘉泰姆

5~12Gc6嘉泰姆

80Gc6嘉泰姆

CXSD6299|AGc6嘉泰姆

SOP-8PGc6嘉泰姆

VMGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

25Gc6嘉泰姆

4.5Gc6嘉泰姆

13.2Gc6嘉泰姆

0.8Gc6嘉泰姆

5~12Gc6嘉泰姆

16000Gc6嘉泰姆

CXSD62100Gc6嘉泰姆

TQFN3x3-10Gc6嘉泰姆

VMGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

25Gc6嘉泰姆

4.5Gc6嘉泰姆

13.2Gc6嘉泰姆

0.6Gc6嘉泰姆

5~12Gc6嘉泰姆

2500Gc6嘉泰姆

CXSD62101|LGc6嘉泰姆

TDFN3x3-10Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

30Gc6嘉泰姆

3Gc6嘉泰姆

25Gc6嘉泰姆

0.8Gc6嘉泰姆

5~12Gc6嘉泰姆

2000Gc6嘉泰姆

CXSD62102Gc6嘉泰姆

TQFN3x3-16Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

30Gc6嘉泰姆

1.8Gc6嘉泰姆

28Gc6嘉泰姆

0.6Gc6嘉泰姆

5Gc6嘉泰姆

600Gc6嘉泰姆

CXSD62102AGc6嘉泰姆

TQFN 3x3 16Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

30Gc6嘉泰姆

1.8Gc6嘉泰姆

28Gc6嘉泰姆

0.6Gc6嘉泰姆

5Gc6嘉泰姆

600Gc6嘉泰姆

CXSD62103Gc6嘉泰姆

QFN4x4-24Gc6嘉泰姆

VMGc6嘉泰姆

2Gc6嘉泰姆

1Gc6嘉泰姆

50Gc6嘉泰姆

4.5Gc6嘉泰姆

13.2Gc6嘉泰姆

0.6Gc6嘉泰姆

5~12Gc6嘉泰姆

5000Gc6嘉泰姆

CXSD62104Gc6嘉泰姆

TQFN4x4-24Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

2Gc6嘉泰姆

15Gc6嘉泰姆

6Gc6嘉泰姆

25Gc6嘉泰姆

2Gc6嘉泰姆

NGc6嘉泰姆

550Gc6嘉泰姆

CXSD62105Gc6嘉泰姆

TQFN4x4-24Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

2Gc6嘉泰姆

15Gc6嘉泰姆

6Gc6嘉泰姆

25Gc6嘉泰姆

2Gc6嘉泰姆

NGc6嘉泰姆

550Gc6嘉泰姆

CXSD62106|AGc6嘉泰姆

TQFN4x4-4Gc6嘉泰姆

TQFN3x3-20Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

2Gc6嘉泰姆

20Gc6嘉泰姆

3Gc6嘉泰姆

28Gc6嘉泰姆

0.75Gc6嘉泰姆

5Gc6嘉泰姆

800Gc6嘉泰姆

CXSD62107Gc6嘉泰姆

TQFN3x3-16Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

20Gc6嘉泰姆

1.8Gc6嘉泰姆

28Gc6嘉泰姆

0.75Gc6嘉泰姆

5Gc6嘉泰姆

400Gc6嘉泰姆

CXSD62108Gc6嘉泰姆

QFN3.5x3.5-14Gc6嘉泰姆

TQFN3x3-16Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

20Gc6嘉泰姆

1.8Gc6嘉泰姆

28Gc6嘉泰姆

0.75Gc6嘉泰姆

5Gc6嘉泰姆

400Gc6嘉泰姆

CXSD62109Gc6嘉泰姆

TQFN3x3-16Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

2Gc6嘉泰姆

20Gc6嘉泰姆

1.8Gc6嘉泰姆

28Gc6嘉泰姆

0.75Gc6嘉泰姆

5Gc6嘉泰姆

400Gc6嘉泰姆

CXSD62110Gc6嘉泰姆

QFN3x3-20Gc6嘉泰姆

TQFN3x3-16Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

2Gc6嘉泰姆

20Gc6嘉泰姆

3Gc6嘉泰姆

28Gc6嘉泰姆

1.8|1.5|0.5Gc6嘉泰姆

5Gc6嘉泰姆

740Gc6嘉泰姆

CXSD62111Gc6嘉泰姆

TQFN4x4-24Gc6嘉泰姆

|QFN3x3-20Gc6嘉泰姆

CMGc6嘉泰姆

1Gc6嘉泰姆

2Gc6嘉泰姆

15Gc6嘉泰姆

5Gc6嘉泰姆

28Gc6嘉泰姆

0.5Gc6嘉泰姆

NGc6嘉泰姆

3000Gc6嘉泰姆

CXSD62112Gc6嘉泰姆

TDFN3x3-10Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

20Gc6嘉泰姆

1.8Gc6嘉泰姆

28Gc6嘉泰姆

0.5Gc6嘉泰姆

5Gc6嘉泰姆

250Gc6嘉泰姆

CXSD62113|CGc6嘉泰姆

TQFN3x3-20Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

2Gc6嘉泰姆

15Gc6嘉泰姆

6Gc6嘉泰姆

25Gc6嘉泰姆

2Gc6嘉泰姆

NGc6嘉泰姆

550Gc6嘉泰姆

CXSD62113EGc6嘉泰姆

TQFN 3x3 20Gc6嘉泰姆

COTGc6嘉泰姆

2Gc6嘉泰姆

2Gc6嘉泰姆

11Gc6嘉泰姆

6Gc6嘉泰姆

25Gc6嘉泰姆

2Gc6嘉泰姆

NGc6嘉泰姆

550Gc6嘉泰姆

CXSD62114Gc6嘉泰姆

TQFN3x3-20Gc6嘉泰姆

COTGc6嘉泰姆

2Gc6嘉泰姆

2Gc6嘉泰姆

11Gc6嘉泰姆

5.5Gc6嘉泰姆

25Gc6嘉泰姆

2Gc6嘉泰姆

NGc6嘉泰姆

280Gc6嘉泰姆

CXSD62115Gc6嘉泰姆

QFN4x4-24Gc6嘉泰姆

VMGc6嘉泰姆

2Gc6嘉泰姆

1Gc6嘉泰姆

60Gc6嘉泰姆

3.1Gc6嘉泰姆

13.2Gc6嘉泰姆

0.85Gc6嘉泰姆

12Gc6嘉泰姆

5000Gc6嘉泰姆

CXSD62116A|B|CGc6嘉泰姆

SOP-8PGc6嘉泰姆

VMGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

20Gc6嘉泰姆

2.9Gc6嘉泰姆

13.2Gc6嘉泰姆

0.8Gc6嘉泰姆

12Gc6嘉泰姆

16000Gc6嘉泰姆

CXSD62117Gc6嘉泰姆

SOP-20Gc6嘉泰姆

VMGc6嘉泰姆

2Gc6嘉泰姆

2Gc6嘉泰姆

30Gc6嘉泰姆

10Gc6嘉泰姆

13.2Gc6嘉泰姆

1Gc6嘉泰姆

12Gc6嘉泰姆

5000Gc6嘉泰姆

CXSD62118Gc6嘉泰姆

TDFN3x3-10Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

1Gc6嘉泰姆

25Gc6嘉泰姆

1.8Gc6嘉泰姆

28Gc6嘉泰姆

0.7Gc6嘉泰姆

5Gc6嘉泰姆

250Gc6嘉泰姆

CXSD62119Gc6嘉泰姆

TQFN3x3-20Gc6嘉泰姆

COTGc6嘉泰姆

2Gc6嘉泰姆

1Gc6嘉泰姆

40Gc6嘉泰姆

1.8Gc6嘉泰姆

25Gc6嘉泰姆

REFIN SettingGc6嘉泰姆

5Gc6嘉泰姆

700Gc6嘉泰姆

CXSD62120Gc6嘉泰姆

QFN 3x3 20Gc6嘉泰姆

TQFN 3x3 16Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

2Gc6嘉泰姆

20Gc6嘉泰姆

3Gc6嘉泰姆

28Gc6嘉泰姆

1.8|1.5 1.35|1.2 0.5Gc6嘉泰姆

5Gc6嘉泰姆

800Gc6嘉泰姆

CXSD62121AGc6嘉泰姆

TQFN3x3 20Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

2Gc6嘉泰姆

15Gc6嘉泰姆

3Gc6嘉泰姆

28Gc6嘉泰姆

0.75Gc6嘉泰姆

5Gc6嘉泰姆

220Gc6嘉泰姆

CXSD62121BGc6嘉泰姆

TQFN3x3 20Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

2Gc6嘉泰姆

15Gc6嘉泰姆

3Gc6嘉泰姆

28Gc6嘉泰姆

0.75Gc6嘉泰姆

5Gc6嘉泰姆

220Gc6嘉泰姆

CXSD62121Gc6嘉泰姆

TQFN3x3-20Gc6嘉泰姆

COTGc6嘉泰姆

1Gc6嘉泰姆

2Gc6嘉泰姆

20Gc6嘉泰姆

3Gc6嘉泰姆

28Gc6嘉泰姆

0.75Gc6嘉泰姆

5Gc6嘉泰姆

180Gc6嘉泰姆

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