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WlG嘉泰姆

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

一,产品概述(General Description)    WlG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.WlG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-WlG嘉泰姆
modulated switching frequencies. In PWM Mode, the converter works nearly at constant frequency for low-noise requirements.WlG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-WlG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.WlG嘉泰姆
  The CXSD62102A is available in 16pin TQFN3x3-16 package respectively.WlG嘉泰姆
二.产品特点(Features)WlG嘉泰姆


Adjustable Output Voltage from +0.6V to +3.3VWlG嘉泰姆
- 0.6V Reference VoltageWlG嘉泰姆
- ±0.6% Accuracy Over-TemperatureWlG嘉泰姆
Operates from An Input Battery Voltage Range ofWlG嘉泰姆
+1.8V to +28VWlG嘉泰姆
REFIN Function for Over-clocking Purpose fromWlG嘉泰姆
0.5V~2.5V rangeWlG嘉泰姆
Power-On-Reset Monitoring on VCC pinWlG嘉泰姆
Excellent line and load transient responsesWlG嘉泰姆
PFM mode for increased light load efficiencyWlG嘉泰姆
Programmable PWM Frequency from 100kHz to 500kHzWlG嘉泰姆
Built in 30A Output current driving capabilityWlG嘉泰姆
Integrate MOSFET DriversWlG嘉泰姆
Integrated Bootstrap Forward P-CH MOSFETWlG嘉泰姆
Power Good MonitoringWlG嘉泰姆
70% Under-Voltage ProtectionWlG嘉泰姆
125% Over-Voltage ProtectionWlG嘉泰姆
TQFN3x3-16 PackageWlG嘉泰姆
Lead Free and Green Devices Available (RoHS Compliant)WlG嘉泰姆
三,应用范围 (Applications)WlG嘉泰姆


NotebookWlG嘉泰姆
Table PCWlG嘉泰姆
Hand-Held PortableWlG嘉泰姆
AIO PCWlG嘉泰姆

四.下载产品资料PDF文档 WlG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WlG嘉泰姆

 QQ截图20160419174301.jpgWlG嘉泰姆

五,产品封装图 (Package)WlG嘉泰姆


WlG嘉泰姆

六.电路原理图WlG嘉泰姆


blob.pngWlG嘉泰姆

七,功能概述WlG嘉泰姆


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

Layout Consideration (Cont.)WlG嘉泰姆

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

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

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VMWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

20WlG嘉泰姆

3WlG嘉泰姆

13.2WlG嘉泰姆

0.8WlG嘉泰姆

5~12WlG嘉泰姆

2500WlG嘉泰姆

CXSD6296A|B|C|DWlG嘉泰姆

SOP8PWlG嘉泰姆

VMWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

25WlG嘉泰姆

3WlG嘉泰姆

13.2WlG嘉泰姆

0.6|0.8WlG嘉泰姆

5~12WlG嘉泰姆

1200WlG嘉泰姆

CXSD6297WlG嘉泰姆

TDFN3x3-10WlG嘉泰姆

VMWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

25WlG嘉泰姆

4WlG嘉泰姆

13.2WlG嘉泰姆

0.8WlG嘉泰姆

5~12WlG嘉泰姆

2000WlG嘉泰姆

CXSD6298WlG嘉泰姆

TDFN3x3-10WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

25WlG嘉泰姆

4.5WlG嘉泰姆

25WlG嘉泰姆

0.6WlG嘉泰姆

5~12WlG嘉泰姆

80WlG嘉泰姆

CXSD6299|AWlG嘉泰姆

SOP-8PWlG嘉泰姆

VMWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

25WlG嘉泰姆

4.5WlG嘉泰姆

13.2WlG嘉泰姆

0.8WlG嘉泰姆

5~12WlG嘉泰姆

16000WlG嘉泰姆

CXSD62100WlG嘉泰姆

TQFN3x3-10WlG嘉泰姆

VMWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

25WlG嘉泰姆

4.5WlG嘉泰姆

13.2WlG嘉泰姆

0.6WlG嘉泰姆

5~12WlG嘉泰姆

2500WlG嘉泰姆

CXSD62101|LWlG嘉泰姆

TDFN3x3-10WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

30WlG嘉泰姆

3WlG嘉泰姆

25WlG嘉泰姆

0.8WlG嘉泰姆

5~12WlG嘉泰姆

2000WlG嘉泰姆

CXSD62102WlG嘉泰姆

TQFN3x3-16WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

30WlG嘉泰姆

1.8WlG嘉泰姆

28WlG嘉泰姆

0.6WlG嘉泰姆

5WlG嘉泰姆

600WlG嘉泰姆

CXSD62102AWlG嘉泰姆

TQFN 3x3 16WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

30WlG嘉泰姆

1.8WlG嘉泰姆

28WlG嘉泰姆

0.6WlG嘉泰姆

5WlG嘉泰姆

600WlG嘉泰姆

CXSD62103WlG嘉泰姆

QFN4x4-24WlG嘉泰姆

VMWlG嘉泰姆

2WlG嘉泰姆

1WlG嘉泰姆

50WlG嘉泰姆

4.5WlG嘉泰姆

13.2WlG嘉泰姆

0.6WlG嘉泰姆

5~12WlG嘉泰姆

5000WlG嘉泰姆

CXSD62104WlG嘉泰姆

TQFN4x4-24WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

2WlG嘉泰姆

15WlG嘉泰姆

6WlG嘉泰姆

25WlG嘉泰姆

2WlG嘉泰姆

NWlG嘉泰姆

550WlG嘉泰姆

CXSD62105WlG嘉泰姆

TQFN4x4-24WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

2WlG嘉泰姆

15WlG嘉泰姆

6WlG嘉泰姆

25WlG嘉泰姆

2WlG嘉泰姆

NWlG嘉泰姆

550WlG嘉泰姆

CXSD62106|AWlG嘉泰姆

TQFN4x4-4WlG嘉泰姆

TQFN3x3-20WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

2WlG嘉泰姆

20WlG嘉泰姆

3WlG嘉泰姆

28WlG嘉泰姆

0.75WlG嘉泰姆

5WlG嘉泰姆

800WlG嘉泰姆

CXSD62107WlG嘉泰姆

TQFN3x3-16WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

20WlG嘉泰姆

1.8WlG嘉泰姆

28WlG嘉泰姆

0.75WlG嘉泰姆

5WlG嘉泰姆

400WlG嘉泰姆

CXSD62108WlG嘉泰姆

QFN3.5x3.5-14WlG嘉泰姆

TQFN3x3-16WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

20WlG嘉泰姆

1.8WlG嘉泰姆

28WlG嘉泰姆

0.75WlG嘉泰姆

5WlG嘉泰姆

400WlG嘉泰姆

CXSD62109WlG嘉泰姆

TQFN3x3-16WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

2WlG嘉泰姆

20WlG嘉泰姆

1.8WlG嘉泰姆

28WlG嘉泰姆

0.75WlG嘉泰姆

5WlG嘉泰姆

400WlG嘉泰姆

CXSD62110WlG嘉泰姆

QFN3x3-20WlG嘉泰姆

TQFN3x3-16WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

2WlG嘉泰姆

20WlG嘉泰姆

3WlG嘉泰姆

28WlG嘉泰姆

1.8|1.5|0.5WlG嘉泰姆

5WlG嘉泰姆

740WlG嘉泰姆

CXSD62111WlG嘉泰姆

TQFN4x4-24WlG嘉泰姆

|QFN3x3-20WlG嘉泰姆

CMWlG嘉泰姆

1WlG嘉泰姆

2WlG嘉泰姆

15WlG嘉泰姆

5WlG嘉泰姆

28WlG嘉泰姆

0.5WlG嘉泰姆

NWlG嘉泰姆

3000WlG嘉泰姆

CXSD62112WlG嘉泰姆

TDFN3x3-10WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

20WlG嘉泰姆

1.8WlG嘉泰姆

28WlG嘉泰姆

0.5WlG嘉泰姆

5WlG嘉泰姆

250WlG嘉泰姆

CXSD62113|CWlG嘉泰姆

TQFN3x3-20WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

2WlG嘉泰姆

15WlG嘉泰姆

6WlG嘉泰姆

25WlG嘉泰姆

2WlG嘉泰姆

NWlG嘉泰姆

550WlG嘉泰姆

CXSD62113EWlG嘉泰姆

TQFN 3x3 20WlG嘉泰姆

COTWlG嘉泰姆

2WlG嘉泰姆

2WlG嘉泰姆

11WlG嘉泰姆

6WlG嘉泰姆

25WlG嘉泰姆

2WlG嘉泰姆

NWlG嘉泰姆

550WlG嘉泰姆

CXSD62114WlG嘉泰姆

TQFN3x3-20WlG嘉泰姆

COTWlG嘉泰姆

2WlG嘉泰姆

2WlG嘉泰姆

11WlG嘉泰姆

5.5WlG嘉泰姆

25WlG嘉泰姆

2WlG嘉泰姆

NWlG嘉泰姆

280WlG嘉泰姆

CXSD62115WlG嘉泰姆

QFN4x4-24WlG嘉泰姆

VMWlG嘉泰姆

2WlG嘉泰姆

1WlG嘉泰姆

60WlG嘉泰姆

3.1WlG嘉泰姆

13.2WlG嘉泰姆

0.85WlG嘉泰姆

12WlG嘉泰姆

5000WlG嘉泰姆

CXSD62116A|B|CWlG嘉泰姆

SOP-8PWlG嘉泰姆

VMWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

20WlG嘉泰姆

2.9WlG嘉泰姆

13.2WlG嘉泰姆

0.8WlG嘉泰姆

12WlG嘉泰姆

16000WlG嘉泰姆

CXSD62117WlG嘉泰姆

SOP-20WlG嘉泰姆

VMWlG嘉泰姆

2WlG嘉泰姆

2WlG嘉泰姆

30WlG嘉泰姆

10WlG嘉泰姆

13.2WlG嘉泰姆

1WlG嘉泰姆

12WlG嘉泰姆

5000WlG嘉泰姆

CXSD62118WlG嘉泰姆

TDFN3x3-10WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

1WlG嘉泰姆

25WlG嘉泰姆

1.8WlG嘉泰姆

28WlG嘉泰姆

0.7WlG嘉泰姆

5WlG嘉泰姆

250WlG嘉泰姆

CXSD62119WlG嘉泰姆

TQFN3x3-20WlG嘉泰姆

COTWlG嘉泰姆

2WlG嘉泰姆

1WlG嘉泰姆

40WlG嘉泰姆

1.8WlG嘉泰姆

25WlG嘉泰姆

REFIN SettingWlG嘉泰姆

5WlG嘉泰姆

700WlG嘉泰姆

CXSD62120WlG嘉泰姆

QFN 3x3 20WlG嘉泰姆

TQFN 3x3 16WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

2WlG嘉泰姆

20WlG嘉泰姆

3WlG嘉泰姆

28WlG嘉泰姆

1.8|1.5 1.35|1.2 0.5WlG嘉泰姆

5WlG嘉泰姆

800WlG嘉泰姆

CXSD62121AWlG嘉泰姆

TQFN3x3 20WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

2WlG嘉泰姆

15WlG嘉泰姆

3WlG嘉泰姆

28WlG嘉泰姆

0.75WlG嘉泰姆

5WlG嘉泰姆

220WlG嘉泰姆

CXSD62121BWlG嘉泰姆

TQFN3x3 20WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

2WlG嘉泰姆

15WlG嘉泰姆

3WlG嘉泰姆

28WlG嘉泰姆

0.75WlG嘉泰姆

5WlG嘉泰姆

220WlG嘉泰姆

CXSD62121WlG嘉泰姆

TQFN3x3-20WlG嘉泰姆

COTWlG嘉泰姆

1WlG嘉泰姆

2WlG嘉泰姆

20WlG嘉泰姆

3WlG嘉泰姆

28WlG嘉泰姆

0.75WlG嘉泰姆

5WlG嘉泰姆

180WlG嘉泰姆

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