单相定时同步的PWM控制器CXSD62102驱动N通道mosfet瞬态响应和准确的直流电压以PFM或PWM模式输出

首页 > 新闻中心 > 行业新闻

发表时间：2020-04-22浏览次数：188

单相定时同步的PWM控制器CXSD62102驱动N通道mosfet瞬态响应和准确的直流电压以PFM或PWM模式输出

目录bWX嘉泰姆

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

一,产品概述(General Description) bWX嘉泰姆
The CXSD62102 is a single-phase, constant on-time, synchronous PWMbWX嘉泰姆
controller, which drives N-channel MOSFETs. The CXSD62102 steps down highbWX嘉泰姆
voltage to generate low-voltage chipset or RAM supplies in notebook computers.bWX嘉泰姆
The CXSD62102 provides excellent transient response and accurate DC voltagebWX嘉泰姆
output in either PFM or PWM Mode.In Pulse Frequency Mode (PFM), the CXSD62102 provides very high efficiency over light to heavy loads with loading-bWX嘉泰姆
modulated switching frequencies. In PWM Mode, the converter works nearly atbWX嘉泰姆
constant frequency for low-noise requirements. CXSD62102 is built in remotebWX嘉泰姆
sense function for applications that require remote sense.The CXSD62102 isbWX嘉泰姆
equipped with accurate positive current limit, output under-voltage, and outputbWX嘉泰姆
over-voltage protections, perfect for NB applications. The Power-On-ResetbWX嘉泰姆
function monitors the voltage on VCC to prevent wrong operation duringbWX嘉泰姆
power-on. The CXSD62102 has a 1ms digital soft start and built-in an integratedbWX嘉泰姆
output discharge device for soft stop. An internal integrated soft-start ramps upbWX嘉泰姆
the output voltage with programmable slew rate to reduce the start-up current.bWX嘉泰姆
A soft-stop function actively discharges the output capacitors.bWX嘉泰姆
The CXSD62102 is available in 16pin TQFN3x3-16 package respectively.bWX嘉泰姆
二.产品特点(Features)bWX嘉泰姆
1.)Adjustable Output Voltage from +0.6V to +3.3VbWX嘉泰姆
- 0.6V Reference VoltagebWX嘉泰姆
- ±0.6% Accuracy Over-TemperaturebWX嘉泰姆
2.)Operates from An Input Battery Voltage Range of +1.8V to +28VbWX嘉泰姆
3.)Remote Feedback Sense for Excellent Output VoltagebWX嘉泰姆
4.)REFIN Function for Over-clocking Purpose from 0.5V~2.5V rangebWX嘉泰姆
5.)Power-On-Reset Monitoring on VCC pinbWX嘉泰姆
6.)Excellent line and load transient responsesbWX嘉泰姆
7.)PFM mode for increased light load efficiencybWX嘉泰姆
8.)Programmable PWM Frequency from 100kHz to 500kHzbWX嘉泰姆
9.)Selectable Forced PWM or automatic PFM/PWM modebWX嘉泰姆
10.)Built in 30A Output current driving capabilityIntegrate MOSFET DriversbWX嘉泰姆
11.)Integrated Bootstrap Forward P-CH MOSFETbWX嘉泰姆
12.)Adjustable Integrated Soft-Start and Soft-Stop Power Good MonitoringbWX嘉泰姆
13.)70% Under-Voltage ProtectionbWX嘉泰姆
14.)125% Over-Voltage Protection TQFN3x3-16 PackagebWX嘉泰姆
15.)Lead Free and Green Devices AvailablebWX嘉泰姆
三,应用范围 (Applications)bWX嘉泰姆
NotebookbWX嘉泰姆
Table PCbWX嘉泰姆
Hand-Held PortablebWX嘉泰姆
AIO PCbWX嘉泰姆
四.下载产品资料PDF文档 bWX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！bWX嘉泰姆

QQ截图20160419174301.jpg bWX嘉泰姆

五,产品封装图 (Package)bWX嘉泰姆

bWX嘉泰姆

六.电路原理图bWX嘉泰姆

bWX嘉泰姆
bWX嘉泰姆

七,功能概述bWX嘉泰姆

Input Capacitor Selection (Cont.)bWX嘉泰姆
higher than the maximum input voltage. The maximum RMS current rating requirement is approximately IOUT/2,where IOUT is the load current. During power-up, the input capacitors have to handle great amount of surge current.For low-duty notebook appliactions, ceramic capacitor is recommended. The capacitors must be connected be-tween the drain of high-side MOSFET and the source of low-side MOSFET with very low-impeadance PCB layout. bWX嘉泰姆
MOSFET SelectionbWX嘉泰姆
The application for a notebook battery with a maximum voltage of 24V, at least a minimum 30V MOSFETs shouldbWX嘉泰姆
be used. The design has to trade off the gate charge with the RDS(ON) of the MOSFET:For the low-side MOSFET, before it is turned on, the body diode has been conducting. The low-side MOSFET driver will not charge the miller capacitor of this MOSFET.bWX嘉泰姆
In the turning off process of the low-side MOSFET, the load current will shift to the body diode first. The high dv/dt of the phase node voltage will charge the miller capaci-tor through the low-side MOSFET driver sinking current path. This results in much less switchingbWX嘉泰姆
loss of the low-side MOSFETs. The duty cycle is often very small in high battery voltage applications, and the low-side MOSFET will conduct most of the switching cycle; therefore, when using smaller RDS(ON) of the low-side MOSFET, the con-verter can reduce power loss. The gate charge for this MOSFET is usually the secondary consideration. The high-side MOSFET does not have this zero voltage switch-ing condition; in addition, it conducts for less time com-pared to the low-side MOSFET, so the switching loss tends to be dominant. Priority should be given to the MOSFETs with less gate charge, so that both the gate driver loss and switching loss will be minimized.bWX嘉泰姆
The selection of the N-channel power MOSFETs are determined by the R DS(ON), reversing transfer capaci-tance (CRSS) and maximum output current requirement.The losses in the MOSFETs have two components:bWX嘉泰姆
conduction loss and transition loss. For the high-side and low-side MOSFETs, the losses are approximatelybWX嘉泰姆
given by the following equations:bWX嘉泰姆
Phigh-side = IOUT (1+ TC)(RDS(ON))D + (0.5)( IOUT)(VIN)( tSW)FSWbWX嘉泰姆
Plow-side = IOUT (1+ TC)(RDS(ON))(1-D) is the load current TC is the temperature dependency of RDS(ON)bWX嘉泰姆
FSW is the switching frequency tSW is the switching interval D is the duty cycleNote that both MOSFETs have conduction losses while 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.bWX嘉泰姆
Layout ConsiderationbWX嘉泰姆
In any high switching frequency converter, a correct layout is important to ensure proper operation of the regulator.bWX嘉泰姆
With power devices switching at higher frequency, the resulting current transient will cause voltage spike acrossbWX嘉泰姆
the interconnecting impedance and parasitic circuit elements. As an example, consider the turn-off transitionbWX嘉泰姆
of the PWM MOSFET. Before turn-off condition, the MOSFET is carrying the full load current. During turn-off,bWX嘉泰姆
current stops flowing in the MOSFET and is freewheeling by the low side MOSFET and parasitic diode. Any parasiticbWX嘉泰姆
inductance of the circuit generates a large voltage spike during the switching interval. In general, using short andbWX嘉泰姆
wide printed circuit traces should minimize interconnect-ing impedances and the magnitude of voltage spike.bWX嘉泰姆
Besides, signal and power grounds are to be kept sepa-rating and finally combined using ground plane construc-bWX嘉泰姆
tion or single point grounding. The best tie-point between the signal ground and the power ground is at the nega-bWX嘉泰姆
tive side of the output capacitor on each channel, where there is less noise. Noisy traces beneath the IC are notbWX嘉泰姆

八,相关产品 更多同类产品......bWX嘉泰姆

Switching Regulator > Buck ControllerbWX嘉泰姆
Part_No bWX嘉泰姆	Package bWX嘉泰姆	ArchibWX嘉泰姆 tectubWX嘉泰姆	PhasebWX嘉泰姆	No.ofbWX嘉泰姆 PWMbWX嘉泰姆 OutputbWX嘉泰姆	Output bWX嘉泰姆 CurrentbWX嘉泰姆 (A) bWX嘉泰姆	InputbWX嘉泰姆 Voltage (V) bWX嘉泰姆		ReferencebWX嘉泰姆 VoltagebWX嘉泰姆 (V) bWX嘉泰姆	Bias bWX嘉泰姆 VoltagebWX嘉泰姆 (V) bWX嘉泰姆	QuiescentbWX嘉泰姆 CurrentbWX嘉泰姆 (uA) bWX嘉泰姆
Part_No bWX嘉泰姆	Package bWX嘉泰姆	ArchibWX嘉泰姆 tectubWX嘉泰姆	PhasebWX嘉泰姆	No.ofbWX嘉泰姆 PWMbWX嘉泰姆 OutputbWX嘉泰姆	Output bWX嘉泰姆 CurrentbWX嘉泰姆 (A) bWX嘉泰姆	minbWX嘉泰姆	maxbWX嘉泰姆	ReferencebWX嘉泰姆 VoltagebWX嘉泰姆 (V) bWX嘉泰姆	Bias bWX嘉泰姆 VoltagebWX嘉泰姆 (V) bWX嘉泰姆	QuiescentbWX嘉泰姆 CurrentbWX嘉泰姆 (uA) bWX嘉泰姆
CXSD6273bWX嘉泰姆	SOP-14bWX嘉泰姆 QSOP-16bWX嘉泰姆 QFN4x4-16bWX嘉泰姆	VM bWX嘉泰姆	1 bWX嘉泰姆	1 bWX嘉泰姆	30bWX嘉泰姆	2.9 bWX嘉泰姆	13.2bWX嘉泰姆	0.9bWX嘉泰姆	12 bWX嘉泰姆	8000bWX嘉泰姆
CXSD6274bWX嘉泰姆	SOP-8bWX嘉泰姆	VM bWX嘉泰姆	1bWX嘉泰姆	1bWX嘉泰姆	20bWX嘉泰姆	2.9 bWX嘉泰姆	13.2 bWX嘉泰姆	0.8bWX嘉泰姆	12bWX嘉泰姆	5000bWX嘉泰姆
CXSD6274CbWX嘉泰姆	SOP-8bWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	1bWX嘉泰姆	20bWX嘉泰姆	2.9bWX嘉泰姆	13.2bWX嘉泰姆	0.8bWX嘉泰姆	12bWX嘉泰姆	5000bWX嘉泰姆
CXSD6275bWX嘉泰姆	QFN4x4-24bWX嘉泰姆	VMbWX嘉泰姆	2bWX嘉泰姆	1bWX嘉泰姆	60bWX嘉泰姆	3.1bWX嘉泰姆	13.2bWX嘉泰姆	0.6bWX嘉泰姆	12bWX嘉泰姆	5000bWX嘉泰姆
CXSD6276bWX嘉泰姆	SOP-8bWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	1bWX嘉泰姆	20bWX嘉泰姆	2.2bWX嘉泰姆	13.2bWX嘉泰姆	0.8bWX嘉泰姆	5~12bWX嘉泰姆	2100bWX嘉泰姆
CXSD6276AbWX嘉泰姆	SOP-8bWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	1bWX嘉泰姆	20bWX嘉泰姆	2.2bWX嘉泰姆	13.2bWX嘉泰姆	0.8bWX嘉泰姆	5~12bWX嘉泰姆	2100bWX嘉泰姆
CXSD6277/A/BbWX嘉泰姆	SOP8\|TSSOP8bWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	1bWX嘉泰姆	5bWX嘉泰姆	5bWX嘉泰姆	13.2bWX嘉泰姆	1.25\|0.8bWX嘉泰姆	5~12bWX嘉泰姆	3000bWX嘉泰姆
CXSD6278bWX嘉泰姆	SOP-8bWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	1bWX嘉泰姆	10bWX嘉泰姆	3.3bWX嘉泰姆	5.5bWX嘉泰姆	0.8bWX嘉泰姆	5bWX嘉泰姆	2100bWX嘉泰姆
CXSD6279BbWX嘉泰姆	SOP-14bWX嘉泰姆	VM bWX嘉泰姆	1bWX嘉泰姆	1bWX嘉泰姆	10bWX嘉泰姆	5bWX嘉泰姆	13.2bWX嘉泰姆	0.8bWX嘉泰姆	12bWX嘉泰姆	2000bWX嘉泰姆
CXSD6280bWX嘉泰姆	TSSOP-24bWX嘉泰姆 \|QFN5x5-32bWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	2bWX嘉泰姆	20bWX嘉泰姆	5bWX嘉泰姆	13.2bWX嘉泰姆	0.6bWX嘉泰姆	5~12bWX嘉泰姆	4000bWX嘉泰姆
CXSD6281NbWX嘉泰姆	SOP14bWX嘉泰姆 QSOP16bWX嘉泰姆 QFN-16bWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	1bWX嘉泰姆	30bWX嘉泰姆	2.9bWX嘉泰姆	13.2bWX嘉泰姆	0.9bWX嘉泰姆	12bWX嘉泰姆	4000bWX嘉泰姆
CXSD6282bWX嘉泰姆	SOP-14bWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	1bWX嘉泰姆	30bWX嘉泰姆	2.2bWX嘉泰姆	13.2bWX嘉泰姆	0.6bWX嘉泰姆	12bWX嘉泰姆	5000bWX嘉泰姆
CXSD6282AbWX嘉泰姆	SOP-14bWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	1bWX嘉泰姆	30bWX嘉泰姆	2.2bWX嘉泰姆	13.2bWX嘉泰姆	0.6bWX嘉泰姆	12bWX嘉泰姆	5000bWX嘉泰姆
CXSD6283bWX嘉泰姆	SOP-14bWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	1bWX嘉泰姆	25bWX嘉泰姆	2.2bWX嘉泰姆	13.2bWX嘉泰姆	0.8bWX嘉泰姆	12bWX嘉泰姆	5000bWX嘉泰姆
CXSD6284/AbWX嘉泰姆	LQFP7x7 48bWX嘉泰姆 TQFN7x7-48bWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	6bWX嘉泰姆	0.015bWX嘉泰姆	1.4bWX嘉泰姆	6.5bWX嘉泰姆	-bWX嘉泰姆	5bWX嘉泰姆	1800bWX嘉泰姆
CXSD6285bWX嘉泰姆	TSSOP-24PbWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	2bWX嘉泰姆	20bWX嘉泰姆	2.97bWX嘉泰姆	5.5bWX嘉泰姆	0.8bWX嘉泰姆	5~12bWX嘉泰姆	5000bWX嘉泰姆
CXSD6286bWX嘉泰姆	SOP-14bWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	1bWX嘉泰姆	10bWX嘉泰姆	5bWX嘉泰姆	13.2bWX嘉泰姆	0.8bWX嘉泰姆	12bWX嘉泰姆	3000bWX嘉泰姆
CXSD6287bWX嘉泰姆	SOP-8-P\|DIP-8bWX嘉泰姆	VMbWX嘉泰姆	1bWX嘉泰姆	1bWX嘉泰姆

上一篇：多种电源电压的单相恒导通同步单PWM控制器CXSD62101|L驱动N通道mosfet

下一篇：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

发表评论

产品中心

电源管理

LED驱动电路

音频放大IC

电机风扇驱动芯片

MCU存储ADC时钟数据线

功率器件

隔离芯片

电池充电芯片

技术支持

产品方案

质量承诺

联系我们