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：166

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L2a嘉泰姆

1.产品概述         2.产品特点L2a嘉泰姆
3.应用范围       4.下载产品资料PDF文档 L2a嘉泰姆
5.产品封装图                     6.电路原理图             L2a嘉泰姆
7.功能概述       8.相关产品L2a嘉泰姆

一,产品概述(General Description) L2a嘉泰姆

The CXSD62104 integrates dual step-down, constant-ontime, synchronousL2a嘉泰姆

PWM controllers (that drives dual N-channel MOSFETs for each channel) andL2a嘉泰姆
two low drop-out regulators as well as various protections into a chip.The PWML2a嘉泰姆
controllers step down high voltage of a battery to generate low-voltage for NBL2a嘉泰姆
applications. The output of PWM1 and PWM2 can be adjusted from 2V to 5.5VL2a嘉泰姆
by setting a resistive voltage-divider from VOUTx to GND.The linear regulatorsL2a嘉泰姆
provide 5V and 3.3V output for standby power supply. The linear regulatorsL2a嘉泰姆

provide up to 100mA output current. When the PWMx output voltage is higher L2a嘉泰姆

than LDOx bypass threshold, the related LDOx regulator is shut off and its L2a嘉泰姆

output is connected to VOUTx by internal switchover MOSFET. It can save power dissipation.L2a嘉泰姆
The CXSD62104 provides excellent transient response and accurate DC L2a嘉泰姆

output voltage in either PFM or PWM Mode.In Pulse-Frequency Mode (PFM), L2a嘉泰姆

the CXSD62104 provides very high efficiency over light to heavy loads with L2a嘉泰姆

loading-modulated switching frequencies. The Forced-PWM mode works nearly L2a嘉泰姆

at constant frequency for low-noise requirements. The unique ultrasonic modeL2a嘉泰姆

maintains the switching frequency above 25KHz, which eliminates noise in audio applications.L2a嘉泰姆

The CXSD62104 is equipped with accurate sourcing cur-rent-limit, outputL2a嘉泰姆

under-voltage and output over-voltage protections, being perfect for NB L2a嘉泰姆

applications. A 1.7ms (typ.) digital soft-start can reduce the start-up current. L2a嘉泰姆

A soft-stop function actively discharges the output capaci-tors by the discharge L2a嘉泰姆

device. The CXSD62104 has individual enable controls for PWM channels and L2a嘉泰姆

LDOs. Pulling both ENPWM pin and ENLDO pin low shuts down the whole chipL2a嘉泰姆

with low quiescent current close to zero.L2a嘉泰姆
The CXSD62104 is available in a TQFN4x4-24A package.L2a嘉泰姆
二.产品特点(Features)L2a嘉泰姆
Wide Input Voltage Range from 6V to 25VL2a嘉泰姆
Provide 4 Independent Outputs with ±1.5% Accu-L2a嘉泰姆
racy Over-TemperatureL2a嘉泰姆
- PWM1 Controller with Adjustable (2V to 5.5V) Out-putL2a嘉泰姆
PWM2 Controller with Adjustable (2V to 5.5V) Out-putL2a嘉泰姆
100mA Low Dropout Regulator (LDO5) with Fixed 5V OutputL2a嘉泰姆
100mA Low Dropout Regulator (LDO3) with Fixed 3.3V OutputL2a嘉泰姆
Excellent Line/Load Regulations about ±1.5% Over-Temperature RangeL2a嘉泰姆
±1%, (±1.5%, 50μA) 2.0V Reference Voltage OutputL2a嘉泰姆
Built-In POR Control Scheme ImplementedL2a嘉泰姆
Selectable Forced-PWM or Automatic PFM/PWML2a嘉泰姆
(with Selectable Ultrasonic Operation)L2a嘉泰姆
Constant-On-Time Control Scheme with FrequencyL2a嘉泰姆
Compensation for PWM ModeL2a嘉泰姆
Selectable Switching Frequency in PWM ModeL2a嘉泰姆
Built-in Digital Soft-Start for PWM Outputs and Soft-L2a嘉泰姆
Stop for PWM Outputs and LDO OutputsL2a嘉泰姆
Integrated Bootstrap Forward P-CH MOSFETL2a嘉泰姆
High Efficiency over Light to Full Load Range (PWMs)L2a嘉泰姆
Built-in Power Good Indicators (PWMs)L2a嘉泰姆
Independent Enable Inputs (PWMs, LDO)L2a嘉泰姆

70% Under-Voltage and 125% Over-Voltage Protec-tions (PWM)L2a嘉泰姆

Adjustable Current-Limit Protection (PWMs)L2a嘉泰姆
- Using Sense Low-Side MOSFET’s RDS(ON)L2a嘉泰姆
Over-Temperature ProtectionL2a嘉泰姆
4mmx4mm Thin QFN-24 (TQFN4x4-24A) packageL2a嘉泰姆
Lead Free and Green Device Available (RoHS Compliant)L2a嘉泰姆

三,应用范围 (Applications)L2a嘉泰姆

Notebook and Sub-Notebook ComputersL2a嘉泰姆

Portable DevicesL2a嘉泰姆
DDR1, DDR2, and DDR3 Power SuppliesL2a嘉泰姆
3-Cell and 4-Cell Li+ Battery-Powered DevicesL2a嘉泰姆
Graphic CardsL2a嘉泰姆
Game ConsolesL2a嘉泰姆
TelecommunicationsL2a嘉泰姆

四.下载产品资料PDF文档 L2a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！L2a嘉泰姆

QQ截图20160419174301.jpg L2a嘉泰姆

五,产品封装图 (Package)L2a嘉泰姆

L2a嘉泰姆

六.电路原理图L2a嘉泰姆

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七,功能概述L2a嘉泰姆

Input Capacitor SelectionL2a嘉泰姆
The input capacitor is chosen based on the voltage rating and the RMS current rating. For reliable operation, selectL2a嘉泰姆
the capacitor voltage rating to be at least 1.3 times higher than the maximum input voltage. The maximum RMSL2a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 areL2a嘉泰姆
remmended. The capacitors must be connected between the drain of high-side MOSFET and the source of low-L2a嘉泰姆
side MOSFET with very low-impeadance PCB layout. L2a嘉泰姆
MOSFET SelectionL2a嘉泰姆
The application for a notebook battery with a maximum volt-age of 24V, at least a minimum 30V MOSFETs shouldL2a嘉泰姆
be used. The design has to trade off the gate charge with the RDS(ON) of the MOSFET:L2a嘉泰姆
· For the low-side MOSFET, before it is turned on, the body diode has been conducted. The low-side MOSFETL2a嘉泰姆
driver will not charge the miller capacitor of this MOSFET.L2a嘉泰姆
In the turning off process of the low-side MOSFET,the load current will shift to the body diode first. TheL2a嘉泰姆
high dv/dt of the phase node voltage will charge the miller capacitor through the low-side MOSFET driverL2a嘉泰姆
sinking current path. This results in much less switching loss of the low-side MOSFETs. The dutyL2a嘉泰姆
cycle is often very small in high battery voltage applications, and the low-side MOSFET will con-L2a嘉泰姆
duct most of the switching cycle; therefore, the less the RDS(ON) of the low-side MOSFET, the less the powerL2a嘉泰姆
loss. The gate charge for this MOSFET is usually a secondary consideration. The high-side MOSFETL2a嘉泰姆
does not have this zero voltage switching condition, and because it conducts for less timeL2a嘉泰姆
compared to the low-side MOSFET, the switching loss tends to be dominant. Priority should be givenL2a嘉泰姆
to the MOSFETs with less gate charge, so that both the gate driver loss and switching loss will be minimized.L2a嘉泰姆
The selection of the N-channel power MOSFETs are de-termined by the RDS(ON), reversing transfer capacitanceL2a嘉泰姆
(CRSS) and maximum output current requirement. The losses in the MOSFETs have two components: conduc-L2a嘉泰姆
tion loss and transition loss. For the high-side and low-side MOSFETs, the losses are approximately given byL2a嘉泰姆
the following equations:L2a嘉泰姆
Layout ConsiderationL2a嘉泰姆
In any high switching frequency converter, a correct layout is important to ensure proper operation of the regulator.L2a嘉泰姆
With power devices switching at higher frequency, the resulting current transient will cause voltage spike acrossL2a嘉泰姆
the interconnecting impedance and parasitic circuit elements. As an example, consider the turn-off transitionL2a嘉泰姆
of the PWM MOSFET. Before turn-off condition, the MOSFET is carrying the full load current. During turn-off,L2a嘉泰姆
current stops flowing in the MOSFET and is freewheeling by the lower MOSFET and parasitic diode. Any parasiticL2a嘉泰姆
inductance of the circuit generates a large voltage spike during the switching interval. In general, using short andL2a嘉泰姆
wide printed circuit traces should minimize interconnect-ing impedances and the magnitude of voltage spike. AndL2a嘉泰姆
signal and power grounds are to be kept separating and finally combined to use the ground plane construction orL2a嘉泰姆

single point grounding. The best tie-point between the signal ground and the power ground is at the negativeL2a嘉泰姆
side of the output capacitor on each channel, where there is less noise. Noisy traces beneath the IC are notL2a嘉泰姆
recommended. Below is a checklist for your layout:L2a嘉泰姆
Layout Consideration (Cont.)L2a嘉泰姆
Keep the switching nodes (UGATEx, LGATEx, BOOTx,and PHASEx) away from sensitive small signal nodesL2a嘉泰姆
(REF, ILIMx, and FBx) since these nodes are fast mov-ing signals. Therefore, keep traces to these nodes asL2a嘉泰姆
short as possible and there should be no other weak signal traces in parallel with theses traces on any layer.L2a嘉泰姆

Minimizing the impedance with wide layout plane be-tween the two pads reduces the voltage bounce ofL2a嘉泰姆

CXSD62104L2a嘉泰姆

八,相关产品 更多同类产品...... L2a嘉泰姆

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Part_No L2a嘉泰姆	Package L2a嘉泰姆	ArchiL2a嘉泰姆 tectuL2a嘉泰姆	PhaseL2a嘉泰姆	No.ofL2a嘉泰姆 PWML2a嘉泰姆 OutputL2a嘉泰姆	Output L2a嘉泰姆 CurrentL2a嘉泰姆 (A) L2a嘉泰姆	InputL2a嘉泰姆 Voltage (V) L2a嘉泰姆		ReferenceL2a嘉泰姆 VoltageL2a嘉泰姆 (V) L2a嘉泰姆	Bias L2a嘉泰姆 VoltageL2a嘉泰姆 (V) L2a嘉泰姆	QuiescentL2a嘉泰姆 CurrentL2a嘉泰姆 (uA) L2a嘉泰姆
Part_No L2a嘉泰姆	Package L2a嘉泰姆	ArchiL2a嘉泰姆 tectuL2a嘉泰姆	PhaseL2a嘉泰姆	No.ofL2a嘉泰姆 PWML2a嘉泰姆 OutputL2a嘉泰姆	Output L2a嘉泰姆 CurrentL2a嘉泰姆 (A) L2a嘉泰姆	minL2a嘉泰姆	maxL2a嘉泰姆	ReferenceL2a嘉泰姆 VoltageL2a嘉泰姆 (V) L2a嘉泰姆	Bias L2a嘉泰姆 VoltageL2a嘉泰姆 (V) L2a嘉泰姆	QuiescentL2a嘉泰姆 CurrentL2a嘉泰姆 (uA) L2a嘉泰姆
CXSD6273L2a嘉泰姆	SOP-14L2a嘉泰姆 QSOP-16L2a嘉泰姆 QFN4x4-16L2a嘉泰姆	VM L2a嘉泰姆	1 L2a嘉泰姆	1 L2a嘉泰姆	30L2a嘉泰姆	2.9 L2a嘉泰姆	13.2L2a嘉泰姆	0.9L2a嘉泰姆	12 L2a嘉泰姆	8000L2a嘉泰姆
CXSD6274L2a嘉泰姆	SOP-8L2a嘉泰姆	VM L2a嘉泰姆	1L2a嘉泰姆	1L2a嘉泰姆	20L2a嘉泰姆	2.9 L2a嘉泰姆	13.2 L2a嘉泰姆	0.8L2a嘉泰姆	12L2a嘉泰姆	5000L2a嘉泰姆
CXSD6274CL2a嘉泰姆	SOP-8L2a嘉泰姆	VML2a嘉泰姆	1L2a嘉泰姆	1L2a嘉泰姆	20L2a嘉泰姆	2.9L2a嘉泰姆	13.2L2a嘉泰姆	0.8L2a嘉泰姆	12L2a嘉泰姆	5000L2a嘉泰姆
CXSD6275L2a嘉泰姆	QFN4x4-24L2a嘉泰姆	VML2a嘉泰姆	2L2a嘉泰姆	1L2a嘉泰姆	60L2a嘉泰姆	3.1L2a嘉泰姆	13.2L2a嘉泰姆	0.6L2a嘉泰姆	12L2a嘉泰姆	5000L2a嘉泰姆
CXSD6276L2a嘉泰姆	SOP-8L2a嘉泰姆	VML2a嘉泰姆	1L2a嘉泰姆	1L2a嘉泰姆	20L2a嘉泰姆	2.2L2a嘉泰姆	13.2L2a嘉泰姆	0.8L2a嘉泰姆	5~12L2a嘉泰姆	2100L2a嘉泰姆
CXSD6276AL2a嘉泰姆	SOP-8L2a嘉泰姆	VML2a嘉泰姆	1L2a嘉泰姆	1L2a嘉泰姆	20L2a嘉泰姆	2.2L2a嘉泰姆	13.2L2a嘉泰姆	0.8L2a嘉泰姆	5~12L2a嘉泰姆	2100L2a嘉泰姆
CXSD6277/A/BL2a嘉泰姆	SOP8\|TSSOP8L2a嘉泰姆	VML2a嘉泰姆	1L2a嘉泰姆	1L2a嘉泰姆	5L2a嘉泰姆	5L2a嘉泰姆	13.2L2a嘉泰姆	1.25\|0.8L2a嘉泰姆	5~12L2a嘉泰姆	3000L2a嘉泰姆
CXSD6278L2a嘉泰姆	SOP-8L2a嘉泰姆	VML2a嘉泰姆	1L2a嘉泰姆	1L2a嘉泰姆	10L2a嘉泰姆	3.3L2a嘉泰姆	5.5L2a嘉泰姆	0.8L2a嘉泰姆	5L2a嘉泰姆	2100L2a嘉泰姆
CXSD6279BL2a嘉泰姆	SOP-14L2a嘉泰姆	VM L2a嘉泰姆	1L2a嘉泰姆	1L2a嘉泰姆	10L2a嘉泰姆	5L2a嘉泰姆	13.2L2a嘉泰姆	0.8L2a嘉泰姆	12L2a嘉泰姆	2000L2a嘉泰姆
CXSD6280L2a嘉泰姆	TSSOP-24L2a嘉泰姆 \|QFN5x5-32L2a嘉泰姆	VML2a嘉泰姆	1L2a嘉泰姆	2L2a嘉泰姆	20L2a嘉泰姆	5L2a嘉泰姆	13.2L2a嘉泰姆	0.6L2a嘉泰姆	5~12L2a嘉泰姆	4000L2a嘉泰姆
CXSD6281NL2a嘉泰姆	SOP14L2a嘉泰姆 QSOP16L2a嘉泰姆 QFN-16L2a嘉泰姆	VML2a嘉泰姆	1L2a嘉泰姆	1L2a嘉泰姆	30L2a嘉泰姆	2.9L2a嘉泰姆	13.2L2a嘉泰姆	0.9L2a嘉泰姆	12L2a嘉泰姆	4000L2a嘉泰姆
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CXSD6282AL2a嘉泰姆	SOP-14L2a嘉泰姆	VML2a嘉泰姆	1L2a嘉泰姆	1L2a嘉泰姆	30L2a嘉泰姆	2.2L2a嘉泰姆	13.2L2a嘉泰姆	0.6L2a嘉泰姆	12L2a嘉泰姆	5000L2a嘉泰姆
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CXSD6284/AL2a嘉泰姆	LQFP7x7 48L2a嘉泰姆 TQFN7x7-48L2a嘉泰姆	VML2a嘉泰姆	1L2a嘉泰姆	6L2a嘉泰姆	0.015L2a嘉泰姆	1.4L2a嘉泰姆	6.5L2a嘉泰姆	-L2a嘉泰姆	5L2a嘉泰姆	1800L2a嘉泰姆
CXSD6285L2a嘉泰姆	TSSOP-24PL2a嘉泰姆	VML2a嘉泰姆	1L2a嘉泰姆	2L2a嘉泰姆	20L2a嘉泰姆	2.97L2a嘉泰姆	5.5L2a嘉泰姆	0.8L2a嘉泰姆	5~12L2a嘉泰姆	5000L2a嘉泰姆
L2a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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