2A异步降压型转换器CXSD62123电流模式控制4.5～26V的输入电压PSM/PWM模式下调节输出电压

首页 > 新闻中心 > 行业新闻

发表时间：2020-04-24浏览次数：117

2A异步降压型转换器CXSD62123电流模式控制4.5～26V的输入电压PSM/PWM模式下调节输出电压

目录weN嘉泰姆

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

一,产品概述(General Description) weN嘉泰姆
The CXSD62123 is a 2A, asynchronous, step-down con-verter with integratedweN嘉泰姆
100mΩ P-channel MOSFET. The device, with current-mode control scheme, canweN嘉泰姆
convert 4.5~26V input voltage to the output voltage adjustable from 0.8 to 90%weN嘉泰姆

VIN to provide excellent output voltage regulation.weN嘉泰姆
The CXSD62123 regulates the output voltage in automatic PSM/PWM modeweN嘉泰姆
operation, depending on the output current, for high efficiency operation over lightweN嘉泰姆
to full load current. The CXSD62123 is also equipped with power-on-reset, soft-start, and whole protections (under-voltage,over- temperature, and current-limit) weN嘉泰姆

into a single package.In shutdown mode, the supply current drops below 5μA.weN嘉泰姆

This device, available in a 8-pin SOP-8 package, pro-vides a very compact weN嘉泰姆

system solution with minimal exter-nal components.weN嘉泰姆
二.产品特点(Features)weN嘉泰姆
Wide Input Voltage from 4.5V to 26VweN嘉泰姆
Output Current up to 2AweN嘉泰姆
Adjustable Output Voltage from 0.8V to 90%VINweN嘉泰姆
- 0.8V Reference VoltageweN嘉泰姆
- ±2.5% System AccuracyweN嘉泰姆
100mΩ Integrated P-Channel Power MOSFETweN嘉泰姆
High Efficiency up to 91%weN嘉泰姆
- Pulse-Skipping Mode (PSM) / PWM Mode Op-erationweN嘉泰姆
Current-Mode OperationweN嘉泰姆
- Stable with Ceramic Output CapacitorsweN嘉泰姆
- Fast Transient ResponseweN嘉泰姆
Power-On-Reset MonitoringweN嘉泰姆
Fixed 380kHz Switching Frequency in PWM ModeweN嘉泰姆
Built-in Digital Soft-StartweN嘉泰姆
Output Current-Limit Protection with Frequency FoldbackweN嘉泰姆
70% Under-Voltage ProtectionweN嘉泰姆
Over-Temperature ProtectionweN嘉泰姆
<5μA Quiescent Current During Shutdown SOP-8 PackageweN嘉泰姆
Lead Free and Green Devices Available (RoHS Compliant)weN嘉泰姆
三,应用范围 (Applications)weN嘉泰姆
LCD Monitor / TVweN嘉泰姆
Set-Top BoxweN嘉泰姆
Portable DVDweN嘉泰姆
Wireless LANweN嘉泰姆
ADSL, Switch HUBweN嘉泰姆
Notebook ComputerweN嘉泰姆
Step-Down Converters Requiring High Efficiency and 2A Output CurrentweN嘉泰姆

四.下载产品资料PDF文档 weN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！weN嘉泰姆

QQ截图20160419174301.jpg weN嘉泰姆

五,产品封装图 (Package)weN嘉泰姆

weN嘉泰姆
六.电路原理图weN嘉泰姆
weN嘉泰姆
weN嘉泰姆

七,功能概述weN嘉泰姆

Inductor Value CalculationweN嘉泰姆
The operating frequency and inductor selection are interrelated in that higher operating frequencies permit the use of a smaller inductor for the same amount of inductorripple current. However, this is at the expense of efficiencyweN嘉泰姆
due to an increase in MOSFET gate charge losses. The equation (2) shows that the inductance value has a directweN嘉泰姆
effect on ripple current.Accepting larger values of ripple current allows the use of low inductances but results inweN嘉泰姆
higher output voltage ripple and greater core losses. A reasonable starting point for setting ripple current isweN嘉泰姆
∆I ≤ 0.4. IOUT(MAX). Remember, the maximum ripple current occurs at the maximum input voltage. weN嘉泰姆
Output Diode SelectionweN嘉泰姆
The Schottky diode carries load current during the offtime. Therefore, the average diode current is dependentweN嘉泰姆
on the P-channel power MOSFET duty cycle. At high input voltages, the diode conducts most of the time. As VIN ap-proaches VOUT, the diode conducts only a small fraction of the time. The most stressful condition for the diode is when the output is short-circuited. Therefore, it is important to adequately specify the diode peak current and av-weN嘉泰姆
erage power dissipation so as not to exceed the diode ratings.weN嘉泰姆
In high power switching regulator, a correct layout is important to ensure proper operation of the regulator. InweN嘉泰姆
general, interconnecting impedance should be minimized by using short and wide printed circuit traces. Signal andweN嘉泰姆
power grounds are to be kept separating and finally c om bined using ground plane construction orweN嘉泰姆
single point grounding. Figure 2 illustrates the layout,with bold lines indicating high current paths. Components along the bold lines should be placed close together.weN嘉泰姆
Below is a checklist for your layout:weN嘉泰姆
pedances should be minimized by using wide and short printed circuit traces.weN嘉泰姆
3. Keep the sensitive small signal nodes (FB, COMP)away from switching nodes (LX or others) on the PCB.weN嘉泰姆
Therefore, place the feedback divider and the feedback compensation network close to the IC to avoid switch-weN嘉泰姆
ing noise. Connect the ground of feedback divider directly to the GND pin of the IC using a dedicatedweN嘉泰姆
ground trace.weN嘉泰姆
4. The VCC decoupling capacitor should be right next to the VCC and GND pins. Capacitor C2 should beweN嘉泰姆
connected as close to the VIN and UGND pins as possible.weN嘉泰姆
5. Place the decoupling ceramic capacitor C1 near the VIN as close as possible. The bulk capacitors C8 areweN嘉泰姆
also placed near VIN. Use a wide power ground plane to connect the C1, C8, C4, and Schottky diode to pro-weN嘉泰姆
vide a low impedance path between the components for large and high slew rate current.weN嘉泰姆
八,相关产品 更多同类产品.......weN嘉泰姆

Switching Regulator > Buck ConverterweN嘉泰姆
Part_No weN嘉泰姆	PackageweN嘉泰姆	ArchitectuweN嘉泰姆	No.ofweN嘉泰姆 PWM weN嘉泰姆 OutpuweN嘉泰姆	DriveweN嘉泰姆 LoutweN嘉泰姆 (A) weN嘉泰姆	Vin(V) weN嘉泰姆		FmaxweN嘉泰姆 Khz weN嘉泰姆	Vref weN嘉泰姆 (V) weN嘉泰姆	R-Top (milohm) weN嘉泰姆	R-Sync (milohm) weN嘉泰姆	Iq (No load) (uA) weN嘉泰姆
Part_No weN嘉泰姆	PackageweN嘉泰姆	ArchitectuweN嘉泰姆	No.ofweN嘉泰姆 PWM weN嘉泰姆 OutpuweN嘉泰姆	DriveweN嘉泰姆 LoutweN嘉泰姆 (A) weN嘉泰姆	minweN嘉泰姆	maxweN嘉泰姆	FmaxweN嘉泰姆 Khz weN嘉泰姆	Vref weN嘉泰姆 (V) weN嘉泰姆	R-Top (milohm) weN嘉泰姆	R-Sync (milohm) weN嘉泰姆	Iq (No load) (uA) weN嘉泰姆
CXSD62122weN嘉泰姆	TQFN5x6-28weN嘉泰姆	CMweN嘉泰姆	1weN嘉泰姆	5weN嘉泰姆	4.5weN嘉泰姆	26weN嘉泰姆	380weN嘉泰姆	0.8weN嘉泰姆	50weN嘉泰姆	20weN嘉泰姆	1000weN嘉泰姆
CXSD62123weN嘉泰姆	SOP-8weN嘉泰姆	CMweN嘉泰姆	1weN嘉泰姆	2weN嘉泰姆	4.5weN嘉泰姆	26weN嘉泰姆	380weN嘉泰姆	0.8weN嘉泰姆	100weN嘉泰姆		1000weN嘉泰姆
CXSD62124weN嘉泰姆	SOP-8PweN嘉泰姆	CMweN嘉泰姆	1weN嘉泰姆	4weN嘉泰姆	4.5weN嘉泰姆	26weN嘉泰姆	380weN嘉泰姆	0.8weN嘉泰姆	80weN嘉泰姆		1000weN嘉泰姆
CXSD62125weN嘉泰姆	SOT23-5\|TSOT23-5weN嘉泰姆	CMweN嘉泰姆	1weN嘉泰姆	1weN嘉泰姆	2.7weN嘉泰姆	6weN嘉泰姆	1500weN嘉泰姆	0.6weN嘉泰姆	280weN嘉泰姆	250weN嘉泰姆	25weN嘉泰姆
CXSD62125AweN嘉泰姆	SOT23-5weN嘉泰姆	CMweN嘉泰姆	1weN嘉泰姆	1weN嘉泰姆	2.7weN嘉泰姆	6weN嘉泰姆	1500weN嘉泰姆	0.6weN嘉泰姆	280weN嘉泰姆	250weN嘉泰姆
CXSD62126weN嘉泰姆	SOP-8weN嘉泰姆	CMweN嘉泰姆	1weN嘉泰姆	3weN嘉泰姆	4.3weN嘉泰姆	14weN嘉泰姆	500weN嘉泰姆	0.8weN嘉泰姆	70weN嘉泰姆	70weN嘉泰姆	500weN嘉泰姆
CXSD62127weN嘉泰姆	SOP-8PweN嘉泰姆	CMweN嘉泰姆	1weN嘉泰姆	3weN嘉泰姆	4.3weN嘉泰姆	14weN嘉泰姆	500weN嘉泰姆	0.8weN嘉泰姆	55weN嘉泰姆	45weN嘉泰姆	500weN嘉泰姆
CXSD62128BweN嘉泰姆	TDFN3x3-10weN嘉泰姆			3weN嘉泰姆	2.6weN嘉泰姆	5.5weN嘉泰姆	2000weN嘉泰姆	0.8weN嘉泰姆	110weN嘉泰姆	110weN嘉泰姆	460weN嘉泰姆
CXSD62129weN嘉泰姆	TDFN3x3-10weN嘉泰姆	CMweN嘉泰姆	2weN嘉泰姆	1weN嘉泰姆	2.7weN嘉泰姆	6weN嘉泰姆	1500weN嘉泰姆	0.6weN嘉泰姆	280weN嘉泰姆	250weN嘉泰姆	500weN嘉泰姆
CXSD62129AweN嘉泰姆	TDFN3x3-10weN嘉泰姆	CMweN嘉泰姆	2weN嘉泰姆	1weN嘉泰姆	2.7weN嘉泰姆	6weN嘉泰姆	1500weN嘉泰姆	0.6weN嘉泰姆	280weN嘉泰姆	250weN嘉泰姆
CXSD62130weN嘉泰姆	TDFN2x2-6weN嘉泰姆	CMweN嘉泰姆	1weN嘉泰姆	1weN嘉泰姆	2.7weN嘉泰姆	6weN嘉泰姆	1500weN嘉泰姆	0.6weN嘉泰姆	280weN嘉泰姆	250weN嘉泰姆	25weN嘉泰姆
CXSD62130AweN嘉泰姆	TDFN2x2-6weN嘉泰姆	CMweN嘉泰姆	1weN嘉泰姆	1weN嘉泰姆	2.7weN嘉泰姆	6weN嘉泰姆	1500weN嘉泰姆	0.6weN嘉泰姆	280weN嘉泰姆	250weN嘉泰姆
CXSD62131weN嘉泰姆	TDFN3x3-12weN嘉泰姆	CMweN嘉泰姆	2weN嘉泰姆	1weN嘉泰姆	2.7weN嘉泰姆	6weN嘉泰姆	1500weN嘉泰姆	0.6weN嘉泰姆	280weN嘉泰姆	250weN嘉泰姆	25weN嘉泰姆
CXSD62131AweN嘉泰姆	TDFN3x3-12weN嘉泰姆	CMweN嘉泰姆	2weN嘉泰姆	1weN嘉泰姆	2.7weN嘉泰姆	6weN嘉泰姆	1500weN嘉泰姆	0.6weN嘉泰姆	280weN嘉泰姆	250weN嘉泰姆
CXSD62131CweN嘉泰姆	TDFN 3x3 12weN嘉泰姆	CMweN嘉泰姆	2weN嘉泰姆	1weN嘉泰姆	3weN嘉泰姆	5.5weN嘉泰姆	1500weN嘉泰姆	0.6weN嘉泰姆	280weN嘉泰姆	250weN嘉泰姆	30weN嘉泰姆
CXSD62132weN嘉泰姆	TQFN3x3-20weN嘉泰姆	CMweN嘉泰姆	3weN嘉泰姆	2weN嘉泰姆	2.9weN嘉泰姆	5.5weN嘉泰姆	1500weN嘉泰姆	0.6weN嘉泰姆	-weN嘉泰姆	-weN嘉泰姆	300weN嘉泰姆
CXSD62133weN嘉泰姆	TDFN2x2-8weN嘉泰姆	CMweN嘉泰姆	1weN嘉泰姆	1weN嘉泰姆	3.3weN嘉泰姆	8weN嘉泰姆	1500weN嘉泰姆	0.6weN嘉泰姆	280weN嘉泰姆	250weN嘉泰姆	25weN嘉泰姆
CXSD62134weN嘉泰姆	SOP-8weN嘉泰姆	CMweN嘉泰姆	1weN嘉泰姆	2weN嘉泰姆	4.5weN嘉泰姆	24weN嘉泰姆	340weN嘉泰姆	0.925weN嘉泰姆	110weN嘉泰姆	110weN嘉泰姆	1900weN嘉泰姆
CXSD62135weN嘉泰姆	SOP-8PweN嘉泰姆	CMweN嘉泰姆	1weN嘉泰姆	3weN嘉泰姆	4.5weN嘉泰姆	24weN嘉泰姆	340weN嘉泰姆	0.925weN嘉泰姆	110weN嘉泰姆	110weN嘉泰姆	1900weN嘉泰姆

上一篇：5A同步降压转换器CXSD62122 50mΩ P沟道功率MOSFET和20mΩ N沟道功率MOSFET电流模式控制方案

下一篇：4A26V380kHz异步降压转换器CXSD62124 80mW P沟道MOSFET 输出电流调节自动PSM/PWM模式操作中的输出电压

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