CXSD62104双降压恒时同步的PWM控制器两个低损耗稳压器PWM1和PWM2的输出可以从2V调整到5.5V

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发表时间：2020-04-22浏览次数：323

CXSD62104双降压恒时同步的PWM控制器两个低损耗稳压器PWM1和PWM2的输出可以从2V调整到5.5V

目录Wev嘉泰姆

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

一,产品概述(General Description) Wev嘉泰姆

The CXSD62104 integrates dual step-down, constant-ontime, synchronousWev嘉泰姆

PWM controllers (that drives dual N-channel MOSFETs for each channel) andWev嘉泰姆
two low drop-out regulators as well as various protections into a chip.The PWMWev嘉泰姆
controllers step down high voltage of a battery to generate low-voltage for NBWev嘉泰姆
applications. The output of PWM1 and PWM2 can be adjusted from 2V to 5.5VWev嘉泰姆
by setting a resistive voltage-divider from VOUTx to GND.The linear regulatorsWev嘉泰姆
provide 5V and 3.3V output for standby power supply. The linear regulatorsWev嘉泰姆

provide up to 100mA output current. When the PWMx output voltage is higher Wev嘉泰姆

than LDOx bypass threshold, the related LDOx regulator is shut off and its Wev嘉泰姆

output is connected to VOUTx by internal switchover MOSFET. It can save power dissipation.Wev嘉泰姆
The CXSD62104 provides excellent transient response and accurate DC Wev嘉泰姆

output voltage in either PFM or PWM Mode.In Pulse-Frequency Mode (PFM), Wev嘉泰姆

the CXSD62104 provides very high efficiency over light to heavy loads with Wev嘉泰姆

loading-modulated switching frequencies. The Forced-PWM mode works nearly Wev嘉泰姆

at constant frequency for low-noise requirements. The unique ultrasonic modeWev嘉泰姆

maintains the switching frequency above 25KHz, which eliminates noise in audio applications.Wev嘉泰姆

The CXSD62104 is equipped with accurate sourcing cur-rent-limit, outputWev嘉泰姆

under-voltage and output over-voltage protections, being perfect for NB Wev嘉泰姆

applications. A 1.7ms (typ.) digital soft-start can reduce the start-up current. Wev嘉泰姆

A soft-stop function actively discharges the output capaci-tors by the discharge Wev嘉泰姆

device. The CXSD62104 has individual enable controls for PWM channels and Wev嘉泰姆

LDOs. Pulling both ENPWM pin and ENLDO pin low shuts down the whole chipWev嘉泰姆

with low quiescent current close to zero.Wev嘉泰姆
The CXSD62104 is available in a TQFN4x4-24A package.Wev嘉泰姆
二.产品特点(Features)Wev嘉泰姆
Wide Input Voltage Range from 6V to 25VWev嘉泰姆
Provide 4 Independent Outputs with ±1.5% Accu-Wev嘉泰姆
racy Over-TemperatureWev嘉泰姆
- PWM1 Controller with Adjustable (2V to 5.5V) Out-putWev嘉泰姆
PWM2 Controller with Adjustable (2V to 5.5V) Out-putWev嘉泰姆
100mA Low Dropout Regulator (LDO5) with Fixed 5V OutputWev嘉泰姆
100mA Low Dropout Regulator (LDO3) with Fixed 3.3V OutputWev嘉泰姆
Excellent Line/Load Regulations about ±1.5% Over-Temperature RangeWev嘉泰姆
±1%, (±1.5%, 50μA) 2.0V Reference Voltage OutputWev嘉泰姆
Built-In POR Control Scheme ImplementedWev嘉泰姆
Selectable Forced-PWM or Automatic PFM/PWMWev嘉泰姆
(with Selectable Ultrasonic Operation)Wev嘉泰姆
Constant-On-Time Control Scheme with FrequencyWev嘉泰姆
Compensation for PWM ModeWev嘉泰姆
Selectable Switching Frequency in PWM ModeWev嘉泰姆
Built-in Digital Soft-Start for PWM Outputs and Soft-Wev嘉泰姆
Stop for PWM Outputs and LDO OutputsWev嘉泰姆
Integrated Bootstrap Forward P-CH MOSFETWev嘉泰姆
High Efficiency over Light to Full Load Range (PWMs)Wev嘉泰姆
Built-in Power Good Indicators (PWMs)Wev嘉泰姆
Independent Enable Inputs (PWMs, LDO)Wev嘉泰姆

70% Under-Voltage and 125% Over-Voltage Protec-tions (PWM)Wev嘉泰姆

Adjustable Current-Limit Protection (PWMs)Wev嘉泰姆
- Using Sense Low-Side MOSFET’s RDS(ON)Wev嘉泰姆
Over-Temperature ProtectionWev嘉泰姆
4mmx4mm Thin QFN-24 (TQFN4x4-24A) packageWev嘉泰姆
Lead Free and Green Device Available (RoHS Compliant)Wev嘉泰姆

三,应用范围 (Applications)Wev嘉泰姆

Notebook and Sub-Notebook ComputersWev嘉泰姆

Portable DevicesWev嘉泰姆
DDR1, DDR2, and DDR3 Power SuppliesWev嘉泰姆
3-Cell and 4-Cell Li+ Battery-Powered DevicesWev嘉泰姆
Graphic CardsWev嘉泰姆
Game ConsolesWev嘉泰姆
TelecommunicationsWev嘉泰姆

四.下载产品资料PDF文档 Wev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！Wev嘉泰姆

QQ截图20160419174301.jpg Wev嘉泰姆

五,产品封装图 (Package)Wev嘉泰姆

Wev嘉泰姆

六.电路原理图Wev嘉泰姆

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七,功能概述Wev嘉泰姆

Input Capacitor SelectionWev嘉泰姆
The input capacitor is chosen based on the voltage rating and the RMS current rating. For reliable operation, selectWev嘉泰姆
the capacitor voltage rating to be at least 1.3 times higher than the maximum input voltage. The maximum RMSWev嘉泰姆
current rating requirement is approximately IOUT/2, where IOUT is the load current. During power up, the input capaci-tors have to handle large amount of surge current. In low-duty notebook appliactions, ceramic capacitors areWev嘉泰姆
remmended. The capacitors must be connected between the drain of high-side MOSFET and the source of low-Wev嘉泰姆
side MOSFET with very low-impeadance PCB layout. Wev嘉泰姆
MOSFET SelectionWev嘉泰姆
The application for a notebook battery with a maximum volt-age of 24V, at least a minimum 30V MOSFETs shouldWev嘉泰姆
be used. The design has to trade off the gate charge with the RDS(ON) of the MOSFET:Wev嘉泰姆
· For the low-side MOSFET, before it is turned on, the body diode has been conducted. The low-side MOSFETWev嘉泰姆
driver will not charge the miller capacitor of this MOSFET.Wev嘉泰姆
In the turning off process of the low-side MOSFET,the load current will shift to the body diode first. TheWev嘉泰姆
high dv/dt of the phase node voltage will charge the miller capacitor through the low-side MOSFET driverWev嘉泰姆
sinking current path. This results in much less switching loss of the low-side MOSFETs. The dutyWev嘉泰姆
cycle is often very small in high battery voltage applications, and the low-side MOSFET will con-Wev嘉泰姆
duct most of the switching cycle; therefore, the less the RDS(ON) of the low-side MOSFET, the less the powerWev嘉泰姆
loss. The gate charge for this MOSFET is usually a secondary consideration. The high-side MOSFETWev嘉泰姆
does not have this zero voltage switching condition, and because it conducts for less timeWev嘉泰姆
compared to the low-side MOSFET, the switching loss tends to be dominant. Priority should be givenWev嘉泰姆
to the MOSFETs with less gate charge, so that both the gate driver loss and switching loss will be minimized.Wev嘉泰姆
The selection of the N-channel power MOSFETs are de-termined by the RDS(ON), reversing transfer capacitanceWev嘉泰姆
(CRSS) and maximum output current requirement. The losses in the MOSFETs have two components: conduc-Wev嘉泰姆
tion loss and transition loss. For the high-side and low-side MOSFETs, the losses are approximately given byWev嘉泰姆
the following equations:Wev嘉泰姆
Layout ConsiderationWev嘉泰姆
In any high switching frequency converter, a correct layout is important to ensure proper operation of the regulator.Wev嘉泰姆
With power devices switching at higher frequency, the resulting current transient will cause voltage spike acrossWev嘉泰姆
the interconnecting impedance and parasitic circuit elements. As an example, consider the turn-off transitionWev嘉泰姆
of the PWM MOSFET. Before turn-off condition, the MOSFET is carrying the full load current. During turn-off,Wev嘉泰姆
current stops flowing in the MOSFET and is freewheeling by the lower MOSFET and parasitic diode. Any parasiticWev嘉泰姆
inductance of the circuit generates a large voltage spike during the switching interval. In general, using short andWev嘉泰姆
wide printed circuit traces should minimize interconnect-ing impedances and the magnitude of voltage spike. AndWev嘉泰姆
signal and power grounds are to be kept separating and finally combined to use the ground plane construction orWev嘉泰姆

single point grounding. The best tie-point between the signal ground and the power ground is at the negativeWev嘉泰姆
side of the output capacitor on each channel, where there is less noise. Noisy traces beneath the IC are notWev嘉泰姆
recommended. Below is a checklist for your layout:Wev嘉泰姆
Layout Consideration (Cont.)Wev嘉泰姆
Keep the switching nodes (UGATEx, LGATEx, BOOTx,and PHASEx) away from sensitive small signal nodesWev嘉泰姆
(REF, ILIMx, and FBx) since these nodes are fast mov-ing signals. Therefore, keep traces to these nodes asWev嘉泰姆
short as possible and there should be no other weak signal traces in parallel with theses traces on any layer.Wev嘉泰姆

Minimizing the impedance with wide layout plane be-tween the two pads reduces the voltage bounce ofWev嘉泰姆

CXSD62104Wev嘉泰姆

八,相关产品 更多同类产品...... Wev嘉泰姆

Switching Regulator > Buck ControllerWev嘉泰姆
Part_No Wev嘉泰姆	Package Wev嘉泰姆	ArchiWev嘉泰姆 tectuWev嘉泰姆	PhaseWev嘉泰姆	No.ofWev嘉泰姆 PWMWev嘉泰姆 OutputWev嘉泰姆	Output Wev嘉泰姆 CurrentWev嘉泰姆 (A) Wev嘉泰姆	InputWev嘉泰姆 Voltage (V) Wev嘉泰姆		ReferenceWev嘉泰姆 VoltageWev嘉泰姆 (V) Wev嘉泰姆	Bias Wev嘉泰姆 VoltageWev嘉泰姆 (V) Wev嘉泰姆	QuiescentWev嘉泰姆 CurrentWev嘉泰姆 (uA) Wev嘉泰姆
Part_No Wev嘉泰姆	Package Wev嘉泰姆	ArchiWev嘉泰姆 tectuWev嘉泰姆	PhaseWev嘉泰姆	No.ofWev嘉泰姆 PWMWev嘉泰姆 OutputWev嘉泰姆	Output Wev嘉泰姆 CurrentWev嘉泰姆 (A) Wev嘉泰姆	minWev嘉泰姆	maxWev嘉泰姆	ReferenceWev嘉泰姆 VoltageWev嘉泰姆 (V) Wev嘉泰姆	Bias Wev嘉泰姆 VoltageWev嘉泰姆 (V) Wev嘉泰姆	QuiescentWev嘉泰姆 CurrentWev嘉泰姆 (uA) Wev嘉泰姆
CXSD6273Wev嘉泰姆	SOP-14Wev嘉泰姆 QSOP-16Wev嘉泰姆 QFN4x4-16Wev嘉泰姆	VM Wev嘉泰姆	1 Wev嘉泰姆	1 Wev嘉泰姆	30Wev嘉泰姆	2.9 Wev嘉泰姆	13.2Wev嘉泰姆	0.9Wev嘉泰姆	12 Wev嘉泰姆	8000Wev嘉泰姆
CXSD6274Wev嘉泰姆	SOP-8Wev嘉泰姆	VM Wev嘉泰姆	1Wev嘉泰姆	1Wev嘉泰姆	20Wev嘉泰姆	2.9 Wev嘉泰姆	13.2 Wev嘉泰姆	0.8Wev嘉泰姆	12Wev嘉泰姆	5000Wev嘉泰姆
CXSD6274CWev嘉泰姆	SOP-8Wev嘉泰姆	VMWev嘉泰姆	1Wev嘉泰姆	1Wev嘉泰姆	20Wev嘉泰姆	2.9Wev嘉泰姆	13.2Wev嘉泰姆	0.8Wev嘉泰姆	12Wev嘉泰姆	5000Wev嘉泰姆
CXSD6275Wev嘉泰姆	QFN4x4-24Wev嘉泰姆	VMWev嘉泰姆	2Wev嘉泰姆	1Wev嘉泰姆	60Wev嘉泰姆	3.1Wev嘉泰姆	13.2Wev嘉泰姆	0.6Wev嘉泰姆	12Wev嘉泰姆	5000Wev嘉泰姆
CXSD6276Wev嘉泰姆	SOP-8Wev嘉泰姆	VMWev嘉泰姆	1Wev嘉泰姆	1Wev嘉泰姆	20Wev嘉泰姆	2.2Wev嘉泰姆	13.2Wev嘉泰姆	0.8Wev嘉泰姆	5~12Wev嘉泰姆	2100Wev嘉泰姆
CXSD6276AWev嘉泰姆	SOP-8Wev嘉泰姆	VMWev嘉泰姆	1Wev嘉泰姆	1Wev嘉泰姆	20Wev嘉泰姆	2.2Wev嘉泰姆	13.2Wev嘉泰姆	0.8Wev嘉泰姆	5~12Wev嘉泰姆	2100Wev嘉泰姆
CXSD6277/A/BWev嘉泰姆	SOP8\|TSSOP8Wev嘉泰姆	VMWev嘉泰姆	1Wev嘉泰姆	1Wev嘉泰姆	5Wev嘉泰姆	5Wev嘉泰姆	13.2Wev嘉泰姆	1.25\|0.8Wev嘉泰姆	5~12Wev嘉泰姆	3000Wev嘉泰姆
CXSD6278Wev嘉泰姆	SOP-8Wev嘉泰姆	VMWev嘉泰姆	1Wev嘉泰姆	1Wev嘉泰姆	10Wev嘉泰姆	3.3Wev嘉泰姆	5.5Wev嘉泰姆	0.8Wev嘉泰姆	5Wev嘉泰姆	2100Wev嘉泰姆
CXSD6279BWev嘉泰姆	SOP-14Wev嘉泰姆	VM Wev嘉泰姆	1Wev嘉泰姆	1Wev嘉泰姆	10Wev嘉泰姆	5Wev嘉泰姆	13.2Wev嘉泰姆	0.8Wev嘉泰姆	12Wev嘉泰姆	2000Wev嘉泰姆
CXSD6280Wev嘉泰姆	TSSOP-24Wev嘉泰姆 \|QFN5x5-32Wev嘉泰姆	VMWev嘉泰姆	1Wev嘉泰姆	2Wev嘉泰姆	20Wev嘉泰姆	5Wev嘉泰姆	13.2Wev嘉泰姆	0.6Wev嘉泰姆	5~12Wev嘉泰姆	4000Wev嘉泰姆
CXSD6281NWev嘉泰姆	SOP14Wev嘉泰姆 QSOP16Wev嘉泰姆 QFN-16Wev嘉泰姆	VMWev嘉泰姆	1Wev嘉泰姆	1Wev嘉泰姆	30Wev嘉泰姆	2.9Wev嘉泰姆	13.2Wev嘉泰姆	0.9Wev嘉泰姆	12Wev嘉泰姆	4000Wev嘉泰姆
CXSD6282Wev嘉泰姆	SOP-14Wev嘉泰姆	VMWev嘉泰姆	1Wev嘉泰姆	1Wev嘉泰姆	30Wev嘉泰姆	2.2Wev嘉泰姆	13.2Wev嘉泰姆	0.6Wev嘉泰姆	12Wev嘉泰姆	5000Wev嘉泰姆
CXSD6282AWev嘉泰姆	SOP-14Wev嘉泰姆	VMWev嘉泰姆	1Wev嘉泰姆	1Wev嘉泰姆	30Wev嘉泰姆	2.2Wev嘉泰姆	13.2Wev嘉泰姆	0.6Wev嘉泰姆	12Wev嘉泰姆	5000Wev嘉泰姆
CXSD6283Wev嘉泰姆	SOP-14Wev嘉泰姆	VMWev嘉泰姆	1Wev嘉泰姆	1Wev嘉泰姆	25Wev嘉泰姆	2.2Wev嘉泰姆	13.2Wev嘉泰姆	0.8Wev嘉泰姆	12Wev嘉泰姆	5000Wev嘉泰姆
CXSD6284/AWev嘉泰姆	LQFP7x7 48Wev嘉泰姆 TQFN7x7-48Wev嘉泰姆	VMWev嘉泰姆	1Wev嘉泰姆	6Wev嘉泰姆	0.015Wev嘉泰姆	1.4Wev嘉泰姆	6.5Wev嘉泰姆	-Wev嘉泰姆	5Wev嘉泰姆	1800Wev嘉泰姆
CXSD6285Wev嘉泰姆	TSSOP-24PWev嘉泰姆	VMWev嘉泰姆	1Wev嘉泰姆	2Wev嘉泰姆	20Wev嘉泰姆	2.97Wev嘉泰姆	5.5Wev嘉泰姆	0.8Wev嘉泰姆	5~12Wev嘉泰姆	5000Wev嘉泰姆
Wev嘉泰姆

上一篇：两相电压模式和固定频率降压控制器CXSD62103从100kHz到800kHz的可编程脉宽调制开关频率无损耗低边MOSFET Ron电流传感

下一篇：电荷泵CXSD62105笔记本电脑的系统电源脉宽调制控制器集成了双降压恒时同步的脉宽调制控制器

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