CXSD6276A单电源电压5~12V两个电源电压驱动双低成本N通道mosfet自适应穿透保护内置反馈补偿电压型PWM控制 0~100%占空比快速瞬态响应

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发表时间：2020-04-21浏览次数：118

CXSD6276A单电源电压5~12V两个电源电压驱动双低成本N通道mosfet自适应穿透保护内置反馈补偿电压型PWM控制 0~100%占空比快速瞬态响应

目录xJh嘉泰姆

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

一,产品概述(General Description) xJh嘉泰姆

The CXSD6276 CXSD6276A is a fixed 300kHz frequency, voltage mode, andxJh嘉泰姆
synchronous PWM controller. The device drives two low cost N-channelxJh嘉泰姆
MOSFETs and is de-signed to work with single 5~12V or two supplyxJh嘉泰姆
voltage(s), providing excellent regulation for load transients.xJh嘉泰姆
The CXSD6276 CXSD6276A integrates controls, monitoring, and protection functionsxJh嘉泰姆
into a single 8-pin package to provide a low cost and perfect power solution.xJh嘉泰姆
A power-on-reset (POR) circuit monitors the VCC supply voltage to preventxJh嘉泰姆
wrong logic controls. An internal 0.8V reference provides low output voltagexJh嘉泰姆
down to 0.8V for further applications. An built-in digital soft-start with fixedxJh嘉泰姆
soft-start interval prevents the output voltage from overshoot as well as limitsxJh嘉泰姆
the input current. The controller’s over-current protection monitors the outputxJh嘉泰姆
current by using the voltage drop across the low-side MOSFET’s RDS(ON),xJh嘉泰姆
eliminating the need of a current sensing resistor. Additional under voltage andxJh嘉泰姆
over voltage protections monitor the voltage on FB pin for short-circuit andxJh嘉泰姆
over-voltage protections. The over-current protection cycles the soft-startxJh嘉泰姆
function until 4 over-current events are counted.Pulling and holding the voltagexJh嘉泰姆
on OCSET pin below 0.15V with an open drain device shuts down the controller.xJh嘉泰姆
二.产品特点(Features)xJh嘉泰姆

1.)Operating with Single 5~12V Supply VoltagexJh嘉泰姆
2.)or Two Supply VoltagesxJh嘉泰姆
3.)Drive Dual Low Cost N-Channel MOSFETsxJh嘉泰姆
Adaptive Shoot-Through ProtectionxJh嘉泰姆
4.)Built-in Feedback CompensationxJh嘉泰姆
Voltage-Mode PWM ControlxJh嘉泰姆
0~100% Duty RatioxJh嘉泰姆
Fast Transient ResponsexJh嘉泰姆
5.)±2% 0.8V ReferencexJh嘉泰姆
Over Line, Load Regulation, and Operating xJh嘉泰姆
6.)Temperature Programmable Over-Current ProtectionxJh嘉泰姆
Using RDS(ON) of Low-Side MOSFETxJh嘉泰姆
7.)Hiccup-Mode Under-Voltage ProtectionxJh嘉泰姆
8.)118% Over-Voltage ProtectionxJh嘉泰姆
9.)Adjustable Output VoltagexJh嘉泰姆
10.)Small Converter SizexJh嘉泰姆
300kHz Constant Switching FrequencyxJh嘉泰姆
Small SOP-8 PackagexJh嘉泰姆
11.)Built-In Digital Soft-StartxJh嘉泰姆
12.)Shutdown Control Using an External MOSFETxJh嘉泰姆
13.)Lead Free and Green Devices AvailablexJh嘉泰姆
三,应用范围 (Applications)xJh嘉泰姆

MotherboardxJh嘉泰姆
Graphics CardxJh嘉泰姆
High Current, up to 20A, DC-DC ConvertersxJh嘉泰姆
四.下载产品资料PDF文档 xJh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！xJh嘉泰姆

QQ截图20160419174301.jpg xJh嘉泰姆

五,产品封装图 (Package)xJh嘉泰姆

xJh嘉泰姆

BOOT (Pin 1)xJh嘉泰姆

This pin provides ground referenced bias voltage to the high-side MOSFET driver. A bootstrap circuit with a diode connected to 5~12V is used to create a voltage suitable to drive a logic-level N-channel MOSFET.xJh嘉泰姆
UGATE (Pin 2)xJh嘉泰姆
Connect this pin to the high-side N-channel MOSFET’s gate. This pin provides gate drive for the high-side MOSFET.xJh嘉泰姆
GND (Pin 3)xJh嘉泰姆
The GND terminal provides return path for the IC’s biascurrent and the low-side MOSFET driver’s pull-low current. Connect the pin to the system ground via very low impedance layout on PCBs.xJh嘉泰姆
LGATE (Pin 4)xJh嘉泰姆
Connect this pin to the low-side N-channel MOSFET’s gate. This pin provides gate drive for the low-side MOSFET. xJh嘉泰姆
VCC (Pin 5)xJh嘉泰姆
Connect this pin to a 5~12V supply voltage. This pin provides bias supply for the control circuitry and the low-side MOSFET driver. The voltage at this pin is monitored for the Power-On-Reset (POR) purpose. xJh嘉泰姆
FB (Pin 6)xJh嘉泰姆
This pin is the inverting input of the internal Gm amplifier.Connect this pin to the output (VOUT) of the converter via an external resistor divider for closed-loop operation.The output voltage set by the resistor divider is deter-mined using the following formula :xJh嘉泰姆
where R1 is the resistor connected from VOUT to FB ,and R2 is the resistor connected from FB to GND. The FB pin is also monitored for under and over-voltage events. xJh嘉泰姆
OCSET (Pin 7)xJh嘉泰姆
The OCSET is a dual-function input pin for over-current protection and shutdown control. Connect a resistor (ROCSET) from this pin to the Drain of the low-side MOSFET. This resistor, an internal 40μA current source (IOCSET), and the MOSFET’s on-resistance(RDSON) set the converter over-current trip level (IPEAK) according to the following formula:xJh嘉泰姆
Pulling and holding this pin below 0.15V with an open drain device, with very low parasitic capacitor, shuts down the IC with floating output and also resets the over-current counter. Releasing OCSET pin initiates a new soft-start and the converter works again.xJh嘉泰姆
PHASE (Pin 8) xJh嘉泰姆
The pin provides return path for the high-side MOSFETdriver’s pull-low current. Connect this pin to the high-side MOSFET’s sourcexJh嘉泰姆
六.电路原理图xJh嘉泰姆
xJh嘉泰姆
七,功能概述xJh嘉泰姆
Power-On-Reset (POR) xJh嘉泰姆
The CXSD6276 monitors the VCC voltage (V CC) for Power-On-Reset function, preventing wrong logic operation during powering on. When the VCC voltage is ready, the CXSD6276 starts a start-up process and then ramps the output voltage up to the target voltage. xJh嘉泰姆
Soft-StartxJh嘉泰姆
The CXSD6276 has a built-in digital soft-start to control the output voltage rise and limit the current surge at the start-up. During the soft-start, an internal ramp con-nected to the one of the positive inputs of the Gm amplifier rises up from 0V to 2V to replace the reference voltage (0.8V) until the ramp voltage reaches the refer-xJh嘉泰姆
ence voltage. The soft-start interval is about 3.2mstypical, independent of the converter’s input and out-put voltages.xJh嘉泰姆
Over-Current Protection (OCP)xJh嘉泰姆
The over-current function protects the switching c o nverter against over-current or short-circuit conditions. The controller senses the inductor current by detecting the drain-to-source voltage, product of the inductor’s current and the on-resistance, of the low-side MOSFET during it’s on-state. This method enhances the converter’s efficiency and reduces cost by eliminating a current sensing resistor.A resistor (ROCSET), connected from the OCSET to thexJh嘉泰姆
Over-Current Protection (OCP) (Cont.)xJh嘉泰姆
low-side MOSFET’s drain, programs the over-current trip level. An internal 40μA (typical) current source flowing through the ROCSET develops a voltage (VROCSET) across the ROCSET. When the VOCSET xJh嘉泰姆

八,相关产品 更多同类产品...... xJh嘉泰姆

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Part_No xJh嘉泰姆	Package xJh嘉泰姆	ArchixJh嘉泰姆 tectuxJh嘉泰姆	PhasexJh嘉泰姆	No.ofxJh嘉泰姆 PWMxJh嘉泰姆 OutputxJh嘉泰姆	Output xJh嘉泰姆 CurrentxJh嘉泰姆 (A) xJh嘉泰姆	InputxJh嘉泰姆 Voltage (V) xJh嘉泰姆		ReferencexJh嘉泰姆 VoltagexJh嘉泰姆 (V) xJh嘉泰姆	Bias xJh嘉泰姆 VoltagexJh嘉泰姆 (V) xJh嘉泰姆	QuiescentxJh嘉泰姆 CurrentxJh嘉泰姆 (uA) xJh嘉泰姆
Part_No xJh嘉泰姆	Package xJh嘉泰姆	ArchixJh嘉泰姆 tectuxJh嘉泰姆	PhasexJh嘉泰姆	No.ofxJh嘉泰姆 PWMxJh嘉泰姆 OutputxJh嘉泰姆	Output xJh嘉泰姆 CurrentxJh嘉泰姆 (A) xJh嘉泰姆	minxJh嘉泰姆	maxxJh嘉泰姆	ReferencexJh嘉泰姆 VoltagexJh嘉泰姆 (V) xJh嘉泰姆	Bias xJh嘉泰姆 VoltagexJh嘉泰姆 (V) xJh嘉泰姆	QuiescentxJh嘉泰姆 CurrentxJh嘉泰姆 (uA) xJh嘉泰姆
CXSD6273xJh嘉泰姆	SOP-14xJh嘉泰姆 QSOP-16xJh嘉泰姆 QFN4x4-16xJh嘉泰姆	VM xJh嘉泰姆	1 xJh嘉泰姆	1 xJh嘉泰姆	30xJh嘉泰姆	2.9 xJh嘉泰姆	13.2xJh嘉泰姆	0.9xJh嘉泰姆	12 xJh嘉泰姆	8000xJh嘉泰姆
CXSD6274xJh嘉泰姆	SOP-8xJh嘉泰姆	VM xJh嘉泰姆	1xJh嘉泰姆	1xJh嘉泰姆	20xJh嘉泰姆	2.9 xJh嘉泰姆	13.2 xJh嘉泰姆	0.8xJh嘉泰姆	12xJh嘉泰姆	5000xJh嘉泰姆
CXSD6274CxJh嘉泰姆	SOP-8xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	1xJh嘉泰姆	20xJh嘉泰姆	2.9xJh嘉泰姆	13.2xJh嘉泰姆	0.8xJh嘉泰姆	12xJh嘉泰姆	5000xJh嘉泰姆
CXSD6275xJh嘉泰姆	QFN4x4-24xJh嘉泰姆	VMxJh嘉泰姆	2xJh嘉泰姆	1xJh嘉泰姆	60xJh嘉泰姆	3.1xJh嘉泰姆	13.2xJh嘉泰姆	0.6xJh嘉泰姆	12xJh嘉泰姆	5000xJh嘉泰姆
CXSD6276xJh嘉泰姆	SOP-8xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	1xJh嘉泰姆	20xJh嘉泰姆	2.2xJh嘉泰姆	13.2xJh嘉泰姆	0.8xJh嘉泰姆	5~12xJh嘉泰姆	2100xJh嘉泰姆
CXSD6276AxJh嘉泰姆	SOP-8xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	1xJh嘉泰姆	20xJh嘉泰姆	2.2xJh嘉泰姆	13.2xJh嘉泰姆	0.8xJh嘉泰姆	5~12xJh嘉泰姆	2100xJh嘉泰姆
CXSD6277/A/BxJh嘉泰姆	SOP8\|TSSOP8xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	1xJh嘉泰姆	5xJh嘉泰姆	5xJh嘉泰姆	13.2xJh嘉泰姆	1.25\|0.8xJh嘉泰姆	5~12xJh嘉泰姆	3000xJh嘉泰姆
CXSD6278xJh嘉泰姆	SOP-8xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	1xJh嘉泰姆	10xJh嘉泰姆	3.3xJh嘉泰姆	5.5xJh嘉泰姆	0.8xJh嘉泰姆	5xJh嘉泰姆	2100xJh嘉泰姆
CXSD6279BxJh嘉泰姆	SOP-14xJh嘉泰姆	VM xJh嘉泰姆	1xJh嘉泰姆	1xJh嘉泰姆	10xJh嘉泰姆	5xJh嘉泰姆	13.2xJh嘉泰姆	0.8xJh嘉泰姆	12xJh嘉泰姆	2000xJh嘉泰姆
CXSD6280xJh嘉泰姆	TSSOP-24xJh嘉泰姆 \|QFN5x5-32xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	2xJh嘉泰姆	20xJh嘉泰姆	5xJh嘉泰姆	13.2xJh嘉泰姆	0.6xJh嘉泰姆	5~12xJh嘉泰姆	4000xJh嘉泰姆
CXSD6281NxJh嘉泰姆	SOP14xJh嘉泰姆 QSOP16xJh嘉泰姆 QFN-16xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	1xJh嘉泰姆	30xJh嘉泰姆	2.9xJh嘉泰姆	13.2xJh嘉泰姆	0.9xJh嘉泰姆	12xJh嘉泰姆	4000xJh嘉泰姆
CXSD6282xJh嘉泰姆	SOP-14xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	1xJh嘉泰姆	30xJh嘉泰姆	2.2xJh嘉泰姆	13.2xJh嘉泰姆	0.6xJh嘉泰姆	12xJh嘉泰姆	5000xJh嘉泰姆
CXSD6282AxJh嘉泰姆	SOP-14xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	1xJh嘉泰姆	30xJh嘉泰姆	2.2xJh嘉泰姆	13.2xJh嘉泰姆	0.6xJh嘉泰姆	12xJh嘉泰姆	5000xJh嘉泰姆
CXSD6283xJh嘉泰姆	SOP-14xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	1xJh嘉泰姆	25xJh嘉泰姆	2.2xJh嘉泰姆	13.2xJh嘉泰姆	0.8xJh嘉泰姆	12xJh嘉泰姆	5000xJh嘉泰姆
CXSD6284/AxJh嘉泰姆	LQFP7x7 48xJh嘉泰姆 TQFN7x7-48xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	6xJh嘉泰姆	0.015xJh嘉泰姆	1.4xJh嘉泰姆	6.5xJh嘉泰姆	-xJh嘉泰姆	5xJh嘉泰姆	1800xJh嘉泰姆
CXSD6285xJh嘉泰姆	TSSOP-24PxJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	2xJh嘉泰姆	20xJh嘉泰姆	2.97xJh嘉泰姆	5.5xJh嘉泰姆	0.8xJh嘉泰姆	5~12xJh嘉泰姆	5000xJh嘉泰姆
CXSD6286xJh嘉泰姆	SOP-14xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	1xJh嘉泰姆	10xJh嘉泰姆	5xJh嘉泰姆	13.2xJh嘉泰姆	0.8xJh嘉泰姆	12xJh嘉泰姆	3000xJh嘉泰姆
CXSD6287xJh嘉泰姆	SOP-8-P\|DIP-8xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	1xJh嘉泰姆	30xJh嘉泰姆	2.9xJh嘉泰姆	13.2xJh嘉泰姆	1.2xJh嘉泰姆	12xJh嘉泰姆	3000xJh嘉泰姆
CXSD6288xJh嘉泰姆	SSOP28xJh嘉泰姆 QFN4x4-24xJh嘉泰姆	VMxJh嘉泰姆	1xJh嘉泰姆	2xJh嘉泰姆	20xJh嘉泰姆	5xJh嘉泰姆	24xJh嘉泰姆	0.9xJh嘉泰姆

上一篇：CXSD6276是固定的300kHz频率电压模式和同步PWM控制器两个低成本N通道mosfet设计为单电源5~12V或双电源工作电压为负载瞬变提供良好的调节

下一篇：双N通道mosfetCXSD6277/A/B车载直流-直流转换器低成本的同步降压调节器VCC和VC电源的上电复位POR外部可编程软启动检测到输出短路时锁定设备的电压检测

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