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：103

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ZDg嘉泰姆

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

一,产品概述(General Description) ZDg嘉泰姆

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

1.)Operating with Single 5~12V Supply VoltageZDg嘉泰姆
2.)or Two Supply VoltagesZDg嘉泰姆
3.)Drive Dual Low Cost N-Channel MOSFETsZDg嘉泰姆
Adaptive Shoot-Through ProtectionZDg嘉泰姆
4.)Built-in Feedback CompensationZDg嘉泰姆
Voltage-Mode PWM ControlZDg嘉泰姆
0~100% Duty RatioZDg嘉泰姆
Fast Transient ResponseZDg嘉泰姆
5.)±2% 0.8V ReferenceZDg嘉泰姆
Over Line, Load Regulation, and Operating ZDg嘉泰姆
6.)Temperature Programmable Over-Current ProtectionZDg嘉泰姆
Using RDS(ON) of Low-Side MOSFETZDg嘉泰姆
7.)Hiccup-Mode Under-Voltage ProtectionZDg嘉泰姆
8.)118% Over-Voltage ProtectionZDg嘉泰姆
9.)Adjustable Output VoltageZDg嘉泰姆
10.)Small Converter SizeZDg嘉泰姆
300kHz Constant Switching FrequencyZDg嘉泰姆
Small SOP-8 PackageZDg嘉泰姆
11.)Built-In Digital Soft-StartZDg嘉泰姆
12.)Shutdown Control Using an External MOSFETZDg嘉泰姆
13.)Lead Free and Green Devices AvailableZDg嘉泰姆
三,应用范围 (Applications)ZDg嘉泰姆

MotherboardZDg嘉泰姆
Graphics CardZDg嘉泰姆
High Current, up to 20A, DC-DC ConvertersZDg嘉泰姆
四.下载产品资料PDF文档 ZDg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！ZDg嘉泰姆

QQ截图20160419174301.jpg ZDg嘉泰姆

五,产品封装图 (Package)ZDg嘉泰姆

ZDg嘉泰姆

BOOT (Pin 1)ZDg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.ZDg嘉泰姆
UGATE (Pin 2)ZDg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.ZDg嘉泰姆
GND (Pin 3)ZDg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.ZDg嘉泰姆
LGATE (Pin 4)ZDg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. ZDg嘉泰姆
VCC (Pin 5)ZDg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. ZDg嘉泰姆
FB (Pin 6)ZDg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 :ZDg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. ZDg嘉泰姆
OCSET (Pin 7)ZDg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:ZDg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.ZDg嘉泰姆
PHASE (Pin 8) ZDg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 sourceZDg嘉泰姆
六.电路原理图ZDg嘉泰姆
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七,功能概述ZDg嘉泰姆
Power-On-Reset (POR) ZDg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. ZDg嘉泰姆
Soft-StartZDg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-ZDg嘉泰姆
ence voltage. The soft-start interval is about 3.2mstypical, independent of the converter’s input and out-put voltages.ZDg嘉泰姆
Over-Current Protection (OCP)ZDg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 theZDg嘉泰姆
Over-Current Protection (OCP) (Cont.)ZDg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 ZDg嘉泰姆

八,相关产品 更多同类产品...... ZDg嘉泰姆

Switching Regulator > Buck ControllerZDg嘉泰姆
Part_No ZDg嘉泰姆	Package ZDg嘉泰姆	ArchiZDg嘉泰姆 tectuZDg嘉泰姆	PhaseZDg嘉泰姆	No.ofZDg嘉泰姆 PWMZDg嘉泰姆 OutputZDg嘉泰姆	Output ZDg嘉泰姆 CurrentZDg嘉泰姆 (A) ZDg嘉泰姆	InputZDg嘉泰姆 Voltage (V) ZDg嘉泰姆		ReferenceZDg嘉泰姆 VoltageZDg嘉泰姆 (V) ZDg嘉泰姆	Bias ZDg嘉泰姆 VoltageZDg嘉泰姆 (V) ZDg嘉泰姆	QuiescentZDg嘉泰姆 CurrentZDg嘉泰姆 (uA) ZDg嘉泰姆
Part_No ZDg嘉泰姆	Package ZDg嘉泰姆	ArchiZDg嘉泰姆 tectuZDg嘉泰姆	PhaseZDg嘉泰姆	No.ofZDg嘉泰姆 PWMZDg嘉泰姆 OutputZDg嘉泰姆	Output ZDg嘉泰姆 CurrentZDg嘉泰姆 (A) ZDg嘉泰姆	minZDg嘉泰姆	maxZDg嘉泰姆	ReferenceZDg嘉泰姆 VoltageZDg嘉泰姆 (V) ZDg嘉泰姆	Bias ZDg嘉泰姆 VoltageZDg嘉泰姆 (V) ZDg嘉泰姆	QuiescentZDg嘉泰姆 CurrentZDg嘉泰姆 (uA) ZDg嘉泰姆
CXSD6273ZDg嘉泰姆	SOP-14ZDg嘉泰姆 QSOP-16ZDg嘉泰姆 QFN4x4-16ZDg嘉泰姆	VM ZDg嘉泰姆	1 ZDg嘉泰姆	1 ZDg嘉泰姆	30ZDg嘉泰姆	2.9 ZDg嘉泰姆	13.2ZDg嘉泰姆	0.9ZDg嘉泰姆	12 ZDg嘉泰姆	8000ZDg嘉泰姆
CXSD6274ZDg嘉泰姆	SOP-8ZDg嘉泰姆	VM ZDg嘉泰姆	1ZDg嘉泰姆	1ZDg嘉泰姆	20ZDg嘉泰姆	2.9 ZDg嘉泰姆	13.2 ZDg嘉泰姆	0.8ZDg嘉泰姆	12ZDg嘉泰姆	5000ZDg嘉泰姆
CXSD6274CZDg嘉泰姆	SOP-8ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	1ZDg嘉泰姆	20ZDg嘉泰姆	2.9ZDg嘉泰姆	13.2ZDg嘉泰姆	0.8ZDg嘉泰姆	12ZDg嘉泰姆	5000ZDg嘉泰姆
CXSD6275ZDg嘉泰姆	QFN4x4-24ZDg嘉泰姆	VMZDg嘉泰姆	2ZDg嘉泰姆	1ZDg嘉泰姆	60ZDg嘉泰姆	3.1ZDg嘉泰姆	13.2ZDg嘉泰姆	0.6ZDg嘉泰姆	12ZDg嘉泰姆	5000ZDg嘉泰姆
CXSD6276ZDg嘉泰姆	SOP-8ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	1ZDg嘉泰姆	20ZDg嘉泰姆	2.2ZDg嘉泰姆	13.2ZDg嘉泰姆	0.8ZDg嘉泰姆	5~12ZDg嘉泰姆	2100ZDg嘉泰姆
CXSD6276AZDg嘉泰姆	SOP-8ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	1ZDg嘉泰姆	20ZDg嘉泰姆	2.2ZDg嘉泰姆	13.2ZDg嘉泰姆	0.8ZDg嘉泰姆	5~12ZDg嘉泰姆	2100ZDg嘉泰姆
CXSD6277/A/BZDg嘉泰姆	SOP8\|TSSOP8ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	1ZDg嘉泰姆	5ZDg嘉泰姆	5ZDg嘉泰姆	13.2ZDg嘉泰姆	1.25\|0.8ZDg嘉泰姆	5~12ZDg嘉泰姆	3000ZDg嘉泰姆
CXSD6278ZDg嘉泰姆	SOP-8ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	1ZDg嘉泰姆	10ZDg嘉泰姆	3.3ZDg嘉泰姆	5.5ZDg嘉泰姆	0.8ZDg嘉泰姆	5ZDg嘉泰姆	2100ZDg嘉泰姆
CXSD6279BZDg嘉泰姆	SOP-14ZDg嘉泰姆	VM ZDg嘉泰姆	1ZDg嘉泰姆	1ZDg嘉泰姆	10ZDg嘉泰姆	5ZDg嘉泰姆	13.2ZDg嘉泰姆	0.8ZDg嘉泰姆	12ZDg嘉泰姆	2000ZDg嘉泰姆
CXSD6280ZDg嘉泰姆	TSSOP-24ZDg嘉泰姆 \|QFN5x5-32ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	2ZDg嘉泰姆	20ZDg嘉泰姆	5ZDg嘉泰姆	13.2ZDg嘉泰姆	0.6ZDg嘉泰姆	5~12ZDg嘉泰姆	4000ZDg嘉泰姆
CXSD6281NZDg嘉泰姆	SOP14ZDg嘉泰姆 QSOP16ZDg嘉泰姆 QFN-16ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	1ZDg嘉泰姆	30ZDg嘉泰姆	2.9ZDg嘉泰姆	13.2ZDg嘉泰姆	0.9ZDg嘉泰姆	12ZDg嘉泰姆	4000ZDg嘉泰姆
CXSD6282ZDg嘉泰姆	SOP-14ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	1ZDg嘉泰姆	30ZDg嘉泰姆	2.2ZDg嘉泰姆	13.2ZDg嘉泰姆	0.6ZDg嘉泰姆	12ZDg嘉泰姆	5000ZDg嘉泰姆
CXSD6282AZDg嘉泰姆	SOP-14ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	1ZDg嘉泰姆	30ZDg嘉泰姆	2.2ZDg嘉泰姆	13.2ZDg嘉泰姆	0.6ZDg嘉泰姆	12ZDg嘉泰姆	5000ZDg嘉泰姆
CXSD6283ZDg嘉泰姆	SOP-14ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	1ZDg嘉泰姆	25ZDg嘉泰姆	2.2ZDg嘉泰姆	13.2ZDg嘉泰姆	0.8ZDg嘉泰姆	12ZDg嘉泰姆	5000ZDg嘉泰姆
CXSD6284/AZDg嘉泰姆	LQFP7x7 48ZDg嘉泰姆 TQFN7x7-48ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	6ZDg嘉泰姆	0.015ZDg嘉泰姆	1.4ZDg嘉泰姆	6.5ZDg嘉泰姆	-ZDg嘉泰姆	5ZDg嘉泰姆	1800ZDg嘉泰姆
CXSD6285ZDg嘉泰姆	TSSOP-24PZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	2ZDg嘉泰姆	20ZDg嘉泰姆	2.97ZDg嘉泰姆	5.5ZDg嘉泰姆	0.8ZDg嘉泰姆	5~12ZDg嘉泰姆	5000ZDg嘉泰姆
CXSD6286ZDg嘉泰姆	SOP-14ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	1ZDg嘉泰姆	10ZDg嘉泰姆	5ZDg嘉泰姆	13.2ZDg嘉泰姆	0.8ZDg嘉泰姆	12ZDg嘉泰姆	3000ZDg嘉泰姆
CXSD6287ZDg嘉泰姆	SOP-8-P\|DIP-8ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	1ZDg嘉泰姆	30ZDg嘉泰姆	2.9ZDg嘉泰姆	13.2ZDg嘉泰姆	1.2ZDg嘉泰姆	12ZDg嘉泰姆	3000ZDg嘉泰姆
CXSD6288ZDg嘉泰姆	SSOP28ZDg嘉泰姆 QFN4x4-24ZDg嘉泰姆	VMZDg嘉泰姆	1ZDg嘉泰姆	2ZDg嘉泰姆	20ZDg嘉泰姆	5ZDg嘉泰姆	24ZDg嘉泰姆	0.9ZDg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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