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vwt嘉泰姆

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

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


Adjustable Output Voltage from +0.6V to +3.3Vvwt嘉泰姆
- 0.6V Reference Voltagevwt嘉泰姆
- ±0.6% Accuracy Over-Temperaturevwt嘉泰姆
Operates from An Input Battery Voltage Range ofvwt嘉泰姆
+1.8V to +28Vvwt嘉泰姆
REFIN Function for Over-clocking Purpose fromvwt嘉泰姆
0.5V~2.5V rangevwt嘉泰姆
Power-On-Reset Monitoring on VCC pinvwt嘉泰姆
Excellent line and load transient responsesvwt嘉泰姆
PFM mode for increased light load efficiencyvwt嘉泰姆
Programmable PWM Frequency from 100kHz to 500kHzvwt嘉泰姆
Built in 30A Output current driving capabilityvwt嘉泰姆
Integrate MOSFET Driversvwt嘉泰姆
Integrated Bootstrap Forward P-CH MOSFETvwt嘉泰姆
Power Good Monitoringvwt嘉泰姆
70% Under-Voltage Protectionvwt嘉泰姆
125% Over-Voltage Protectionvwt嘉泰姆
TQFN3x3-16 Packagevwt嘉泰姆
Lead Free and Green Devices Available (RoHS Compliant)vwt嘉泰姆
三,应用范围 (Applications)vwt嘉泰姆


Notebookvwt嘉泰姆
Table PCvwt嘉泰姆
Hand-Held Portablevwt嘉泰姆
AIO PCvwt嘉泰姆

四.下载产品资料PDF文档 vwt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vwt嘉泰姆

 QQ截图20160419174301.jpgvwt嘉泰姆

五,产品封装图 (Package)vwt嘉泰姆


vwt嘉泰姆

六.电路原理图vwt嘉泰姆


blob.pngvwt嘉泰姆

七,功能概述vwt嘉泰姆


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

Layout Consideration (Cont.)vwt嘉泰姆

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

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

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


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0.8vwt嘉泰姆

5~12vwt嘉泰姆

2000vwt嘉泰姆

CXSD6298vwt嘉泰姆

TDFN3x3-10vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

1vwt嘉泰姆

25vwt嘉泰姆

4.5vwt嘉泰姆

25vwt嘉泰姆

0.6vwt嘉泰姆

5~12vwt嘉泰姆

80vwt嘉泰姆

CXSD6299|Avwt嘉泰姆

SOP-8Pvwt嘉泰姆

VMvwt嘉泰姆

1vwt嘉泰姆

1vwt嘉泰姆

25vwt嘉泰姆

4.5vwt嘉泰姆

13.2vwt嘉泰姆

0.8vwt嘉泰姆

5~12vwt嘉泰姆

16000vwt嘉泰姆

CXSD62100vwt嘉泰姆

TQFN3x3-10vwt嘉泰姆

VMvwt嘉泰姆

1vwt嘉泰姆

1vwt嘉泰姆

25vwt嘉泰姆

4.5vwt嘉泰姆

13.2vwt嘉泰姆

0.6vwt嘉泰姆

5~12vwt嘉泰姆

2500vwt嘉泰姆

CXSD62101|Lvwt嘉泰姆

TDFN3x3-10vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

1vwt嘉泰姆

30vwt嘉泰姆

3vwt嘉泰姆

25vwt嘉泰姆

0.8vwt嘉泰姆

5~12vwt嘉泰姆

2000vwt嘉泰姆

CXSD62102vwt嘉泰姆

TQFN3x3-16vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

1vwt嘉泰姆

30vwt嘉泰姆

1.8vwt嘉泰姆

28vwt嘉泰姆

0.6vwt嘉泰姆

5vwt嘉泰姆

600vwt嘉泰姆

CXSD62102Avwt嘉泰姆

TQFN 3x3 16vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

1vwt嘉泰姆

30vwt嘉泰姆

1.8vwt嘉泰姆

28vwt嘉泰姆

0.6vwt嘉泰姆

5vwt嘉泰姆

600vwt嘉泰姆

CXSD62103vwt嘉泰姆

QFN4x4-24vwt嘉泰姆

VMvwt嘉泰姆

2vwt嘉泰姆

1vwt嘉泰姆

50vwt嘉泰姆

4.5vwt嘉泰姆

13.2vwt嘉泰姆

0.6vwt嘉泰姆

5~12vwt嘉泰姆

5000vwt嘉泰姆

CXSD62104vwt嘉泰姆

TQFN4x4-24vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

2vwt嘉泰姆

15vwt嘉泰姆

6vwt嘉泰姆

25vwt嘉泰姆

2vwt嘉泰姆

Nvwt嘉泰姆

550vwt嘉泰姆

CXSD62105vwt嘉泰姆

TQFN4x4-24vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

2vwt嘉泰姆

15vwt嘉泰姆

6vwt嘉泰姆

25vwt嘉泰姆

2vwt嘉泰姆

Nvwt嘉泰姆

550vwt嘉泰姆

CXSD62106|Avwt嘉泰姆

TQFN4x4-4vwt嘉泰姆

TQFN3x3-20vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

2vwt嘉泰姆

20vwt嘉泰姆

3vwt嘉泰姆

28vwt嘉泰姆

0.75vwt嘉泰姆

5vwt嘉泰姆

800vwt嘉泰姆

CXSD62107vwt嘉泰姆

TQFN3x3-16vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

1vwt嘉泰姆

20vwt嘉泰姆

1.8vwt嘉泰姆

28vwt嘉泰姆

0.75vwt嘉泰姆

5vwt嘉泰姆

400vwt嘉泰姆

CXSD62108vwt嘉泰姆

QFN3.5x3.5-14vwt嘉泰姆

TQFN3x3-16vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

1vwt嘉泰姆

20vwt嘉泰姆

1.8vwt嘉泰姆

28vwt嘉泰姆

0.75vwt嘉泰姆

5vwt嘉泰姆

400vwt嘉泰姆

CXSD62109vwt嘉泰姆

TQFN3x3-16vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

2vwt嘉泰姆

20vwt嘉泰姆

1.8vwt嘉泰姆

28vwt嘉泰姆

0.75vwt嘉泰姆

5vwt嘉泰姆

400vwt嘉泰姆

CXSD62110vwt嘉泰姆

QFN3x3-20vwt嘉泰姆

TQFN3x3-16vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

2vwt嘉泰姆

20vwt嘉泰姆

3vwt嘉泰姆

28vwt嘉泰姆

1.8|1.5|0.5vwt嘉泰姆

5vwt嘉泰姆

740vwt嘉泰姆

CXSD62111vwt嘉泰姆

TQFN4x4-24vwt嘉泰姆

|QFN3x3-20vwt嘉泰姆

CMvwt嘉泰姆

1vwt嘉泰姆

2vwt嘉泰姆

15vwt嘉泰姆

5vwt嘉泰姆

28vwt嘉泰姆

0.5vwt嘉泰姆

Nvwt嘉泰姆

3000vwt嘉泰姆

CXSD62112vwt嘉泰姆

TDFN3x3-10vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

1vwt嘉泰姆

20vwt嘉泰姆

1.8vwt嘉泰姆

28vwt嘉泰姆

0.5vwt嘉泰姆

5vwt嘉泰姆

250vwt嘉泰姆

CXSD62113|Cvwt嘉泰姆

TQFN3x3-20vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

2vwt嘉泰姆

15vwt嘉泰姆

6vwt嘉泰姆

25vwt嘉泰姆

2vwt嘉泰姆

Nvwt嘉泰姆

550vwt嘉泰姆

CXSD62113Evwt嘉泰姆

TQFN 3x3 20vwt嘉泰姆

COTvwt嘉泰姆

2vwt嘉泰姆

2vwt嘉泰姆

11vwt嘉泰姆

6vwt嘉泰姆

25vwt嘉泰姆

2vwt嘉泰姆

Nvwt嘉泰姆

550vwt嘉泰姆

CXSD62114vwt嘉泰姆

TQFN3x3-20vwt嘉泰姆

COTvwt嘉泰姆

2vwt嘉泰姆

2vwt嘉泰姆

11vwt嘉泰姆

5.5vwt嘉泰姆

25vwt嘉泰姆

2vwt嘉泰姆

Nvwt嘉泰姆

280vwt嘉泰姆

CXSD62115vwt嘉泰姆

QFN4x4-24vwt嘉泰姆

VMvwt嘉泰姆

2vwt嘉泰姆

1vwt嘉泰姆

60vwt嘉泰姆

3.1vwt嘉泰姆

13.2vwt嘉泰姆

0.85vwt嘉泰姆

12vwt嘉泰姆

5000vwt嘉泰姆

CXSD62116A|B|Cvwt嘉泰姆

SOP-8Pvwt嘉泰姆

VMvwt嘉泰姆

1vwt嘉泰姆

1vwt嘉泰姆

20vwt嘉泰姆

2.9vwt嘉泰姆

13.2vwt嘉泰姆

0.8vwt嘉泰姆

12vwt嘉泰姆

16000vwt嘉泰姆

CXSD62117vwt嘉泰姆

SOP-20vwt嘉泰姆

VMvwt嘉泰姆

2vwt嘉泰姆

2vwt嘉泰姆

30vwt嘉泰姆

10vwt嘉泰姆

13.2vwt嘉泰姆

1vwt嘉泰姆

12vwt嘉泰姆

5000vwt嘉泰姆

CXSD62118vwt嘉泰姆

TDFN3x3-10vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

1vwt嘉泰姆

25vwt嘉泰姆

1.8vwt嘉泰姆

28vwt嘉泰姆

0.7vwt嘉泰姆

5vwt嘉泰姆

250vwt嘉泰姆

CXSD62119vwt嘉泰姆

TQFN3x3-20vwt嘉泰姆

COTvwt嘉泰姆

2vwt嘉泰姆

1vwt嘉泰姆

40vwt嘉泰姆

1.8vwt嘉泰姆

25vwt嘉泰姆

REFIN Settingvwt嘉泰姆

5vwt嘉泰姆

700vwt嘉泰姆

CXSD62120vwt嘉泰姆

QFN 3x3 20vwt嘉泰姆

TQFN 3x3 16vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

2vwt嘉泰姆

20vwt嘉泰姆

3vwt嘉泰姆

28vwt嘉泰姆

1.8|1.5 1.35|1.2 0.5vwt嘉泰姆

5vwt嘉泰姆

800vwt嘉泰姆

CXSD62121Avwt嘉泰姆

TQFN3x3 20vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

2vwt嘉泰姆

15vwt嘉泰姆

3vwt嘉泰姆

28vwt嘉泰姆

0.75vwt嘉泰姆

5vwt嘉泰姆

220vwt嘉泰姆

CXSD62121Bvwt嘉泰姆

TQFN3x3 20vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

2vwt嘉泰姆

15vwt嘉泰姆

3vwt嘉泰姆

28vwt嘉泰姆

0.75vwt嘉泰姆

5vwt嘉泰姆

220vwt嘉泰姆

CXSD62121vwt嘉泰姆

TQFN3x3-20vwt嘉泰姆

COTvwt嘉泰姆

1vwt嘉泰姆

2vwt嘉泰姆

20vwt嘉泰姆

3vwt嘉泰姆

28vwt嘉泰姆

0.75vwt嘉泰姆

5vwt嘉泰姆

180vwt嘉泰姆

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