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giY嘉泰姆

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

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


Adjustable Output Voltage from +0.6V to +3.3VgiY嘉泰姆
- 0.6V Reference VoltagegiY嘉泰姆
- ±0.6% Accuracy Over-TemperaturegiY嘉泰姆
Operates from An Input Battery Voltage Range ofgiY嘉泰姆
+1.8V to +28VgiY嘉泰姆
REFIN Function for Over-clocking Purpose fromgiY嘉泰姆
0.5V~2.5V rangegiY嘉泰姆
Power-On-Reset Monitoring on VCC pingiY嘉泰姆
Excellent line and load transient responsesgiY嘉泰姆
PFM mode for increased light load efficiencygiY嘉泰姆
Programmable PWM Frequency from 100kHz to 500kHzgiY嘉泰姆
Built in 30A Output current driving capabilitygiY嘉泰姆
Integrate MOSFET DriversgiY嘉泰姆
Integrated Bootstrap Forward P-CH MOSFETgiY嘉泰姆
Power Good MonitoringgiY嘉泰姆
70% Under-Voltage ProtectiongiY嘉泰姆
125% Over-Voltage ProtectiongiY嘉泰姆
TQFN3x3-16 PackagegiY嘉泰姆
Lead Free and Green Devices Available (RoHS Compliant)giY嘉泰姆
三,应用范围 (Applications)giY嘉泰姆


NotebookgiY嘉泰姆
Table PCgiY嘉泰姆
Hand-Held PortablegiY嘉泰姆
AIO PCgiY嘉泰姆

四.下载产品资料PDF文档 giY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giY嘉泰姆

 QQ截图20160419174301.jpggiY嘉泰姆

五,产品封装图 (Package)giY嘉泰姆


giY嘉泰姆

六.电路原理图giY嘉泰姆


blob.pnggiY嘉泰姆

七,功能概述giY嘉泰姆


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

Layout Consideration (Cont.)giY嘉泰姆

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

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

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0.8giY嘉泰姆

5~12giY嘉泰姆

2000giY嘉泰姆

CXSD6298giY嘉泰姆

TDFN3x3-10giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

1giY嘉泰姆

25giY嘉泰姆

4.5giY嘉泰姆

25giY嘉泰姆

0.6giY嘉泰姆

5~12giY嘉泰姆

80giY嘉泰姆

CXSD6299|AgiY嘉泰姆

SOP-8PgiY嘉泰姆

VMgiY嘉泰姆

1giY嘉泰姆

1giY嘉泰姆

25giY嘉泰姆

4.5giY嘉泰姆

13.2giY嘉泰姆

0.8giY嘉泰姆

5~12giY嘉泰姆

16000giY嘉泰姆

CXSD62100giY嘉泰姆

TQFN3x3-10giY嘉泰姆

VMgiY嘉泰姆

1giY嘉泰姆

1giY嘉泰姆

25giY嘉泰姆

4.5giY嘉泰姆

13.2giY嘉泰姆

0.6giY嘉泰姆

5~12giY嘉泰姆

2500giY嘉泰姆

CXSD62101|LgiY嘉泰姆

TDFN3x3-10giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

1giY嘉泰姆

30giY嘉泰姆

3giY嘉泰姆

25giY嘉泰姆

0.8giY嘉泰姆

5~12giY嘉泰姆

2000giY嘉泰姆

CXSD62102giY嘉泰姆

TQFN3x3-16giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

1giY嘉泰姆

30giY嘉泰姆

1.8giY嘉泰姆

28giY嘉泰姆

0.6giY嘉泰姆

5giY嘉泰姆

600giY嘉泰姆

CXSD62102AgiY嘉泰姆

TQFN 3x3 16giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

1giY嘉泰姆

30giY嘉泰姆

1.8giY嘉泰姆

28giY嘉泰姆

0.6giY嘉泰姆

5giY嘉泰姆

600giY嘉泰姆

CXSD62103giY嘉泰姆

QFN4x4-24giY嘉泰姆

VMgiY嘉泰姆

2giY嘉泰姆

1giY嘉泰姆

50giY嘉泰姆

4.5giY嘉泰姆

13.2giY嘉泰姆

0.6giY嘉泰姆

5~12giY嘉泰姆

5000giY嘉泰姆

CXSD62104giY嘉泰姆

TQFN4x4-24giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

2giY嘉泰姆

15giY嘉泰姆

6giY嘉泰姆

25giY嘉泰姆

2giY嘉泰姆

NgiY嘉泰姆

550giY嘉泰姆

CXSD62105giY嘉泰姆

TQFN4x4-24giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

2giY嘉泰姆

15giY嘉泰姆

6giY嘉泰姆

25giY嘉泰姆

2giY嘉泰姆

NgiY嘉泰姆

550giY嘉泰姆

CXSD62106|AgiY嘉泰姆

TQFN4x4-4giY嘉泰姆

TQFN3x3-20giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

2giY嘉泰姆

20giY嘉泰姆

3giY嘉泰姆

28giY嘉泰姆

0.75giY嘉泰姆

5giY嘉泰姆

800giY嘉泰姆

CXSD62107giY嘉泰姆

TQFN3x3-16giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

1giY嘉泰姆

20giY嘉泰姆

1.8giY嘉泰姆

28giY嘉泰姆

0.75giY嘉泰姆

5giY嘉泰姆

400giY嘉泰姆

CXSD62108giY嘉泰姆

QFN3.5x3.5-14giY嘉泰姆

TQFN3x3-16giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

1giY嘉泰姆

20giY嘉泰姆

1.8giY嘉泰姆

28giY嘉泰姆

0.75giY嘉泰姆

5giY嘉泰姆

400giY嘉泰姆

CXSD62109giY嘉泰姆

TQFN3x3-16giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

2giY嘉泰姆

20giY嘉泰姆

1.8giY嘉泰姆

28giY嘉泰姆

0.75giY嘉泰姆

5giY嘉泰姆

400giY嘉泰姆

CXSD62110giY嘉泰姆

QFN3x3-20giY嘉泰姆

TQFN3x3-16giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

2giY嘉泰姆

20giY嘉泰姆

3giY嘉泰姆

28giY嘉泰姆

1.8|1.5|0.5giY嘉泰姆

5giY嘉泰姆

740giY嘉泰姆

CXSD62111giY嘉泰姆

TQFN4x4-24giY嘉泰姆

|QFN3x3-20giY嘉泰姆

CMgiY嘉泰姆

1giY嘉泰姆

2giY嘉泰姆

15giY嘉泰姆

5giY嘉泰姆

28giY嘉泰姆

0.5giY嘉泰姆

NgiY嘉泰姆

3000giY嘉泰姆

CXSD62112giY嘉泰姆

TDFN3x3-10giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

1giY嘉泰姆

20giY嘉泰姆

1.8giY嘉泰姆

28giY嘉泰姆

0.5giY嘉泰姆

5giY嘉泰姆

250giY嘉泰姆

CXSD62113|CgiY嘉泰姆

TQFN3x3-20giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

2giY嘉泰姆

15giY嘉泰姆

6giY嘉泰姆

25giY嘉泰姆

2giY嘉泰姆

NgiY嘉泰姆

550giY嘉泰姆

CXSD62113EgiY嘉泰姆

TQFN 3x3 20giY嘉泰姆

COTgiY嘉泰姆

2giY嘉泰姆

2giY嘉泰姆

11giY嘉泰姆

6giY嘉泰姆

25giY嘉泰姆

2giY嘉泰姆

NgiY嘉泰姆

550giY嘉泰姆

CXSD62114giY嘉泰姆

TQFN3x3-20giY嘉泰姆

COTgiY嘉泰姆

2giY嘉泰姆

2giY嘉泰姆

11giY嘉泰姆

5.5giY嘉泰姆

25giY嘉泰姆

2giY嘉泰姆

NgiY嘉泰姆

280giY嘉泰姆

CXSD62115giY嘉泰姆

QFN4x4-24giY嘉泰姆

VMgiY嘉泰姆

2giY嘉泰姆

1giY嘉泰姆

60giY嘉泰姆

3.1giY嘉泰姆

13.2giY嘉泰姆

0.85giY嘉泰姆

12giY嘉泰姆

5000giY嘉泰姆

CXSD62116A|B|CgiY嘉泰姆

SOP-8PgiY嘉泰姆

VMgiY嘉泰姆

1giY嘉泰姆

1giY嘉泰姆

20giY嘉泰姆

2.9giY嘉泰姆

13.2giY嘉泰姆

0.8giY嘉泰姆

12giY嘉泰姆

16000giY嘉泰姆

CXSD62117giY嘉泰姆

SOP-20giY嘉泰姆

VMgiY嘉泰姆

2giY嘉泰姆

2giY嘉泰姆

30giY嘉泰姆

10giY嘉泰姆

13.2giY嘉泰姆

1giY嘉泰姆

12giY嘉泰姆

5000giY嘉泰姆

CXSD62118giY嘉泰姆

TDFN3x3-10giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

1giY嘉泰姆

25giY嘉泰姆

1.8giY嘉泰姆

28giY嘉泰姆

0.7giY嘉泰姆

5giY嘉泰姆

250giY嘉泰姆

CXSD62119giY嘉泰姆

TQFN3x3-20giY嘉泰姆

COTgiY嘉泰姆

2giY嘉泰姆

1giY嘉泰姆

40giY嘉泰姆

1.8giY嘉泰姆

25giY嘉泰姆

REFIN SettinggiY嘉泰姆

5giY嘉泰姆

700giY嘉泰姆

CXSD62120giY嘉泰姆

QFN 3x3 20giY嘉泰姆

TQFN 3x3 16giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

2giY嘉泰姆

20giY嘉泰姆

3giY嘉泰姆

28giY嘉泰姆

1.8|1.5 1.35|1.2 0.5giY嘉泰姆

5giY嘉泰姆

800giY嘉泰姆

CXSD62121AgiY嘉泰姆

TQFN3x3 20giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

2giY嘉泰姆

15giY嘉泰姆

3giY嘉泰姆

28giY嘉泰姆

0.75giY嘉泰姆

5giY嘉泰姆

220giY嘉泰姆

CXSD62121BgiY嘉泰姆

TQFN3x3 20giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

2giY嘉泰姆

15giY嘉泰姆

3giY嘉泰姆

28giY嘉泰姆

0.75giY嘉泰姆

5giY嘉泰姆

220giY嘉泰姆

CXSD62121giY嘉泰姆

TQFN3x3-20giY嘉泰姆

COTgiY嘉泰姆

1giY嘉泰姆

2giY嘉泰姆

20giY嘉泰姆

3giY嘉泰姆

28giY嘉泰姆

0.75giY嘉泰姆

5giY嘉泰姆

180giY嘉泰姆

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