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：157

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YUH嘉泰姆

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

一,产品概述(General Description) YUH嘉泰姆

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

1.)Operating with Single 5~12V Supply VoltageYUH嘉泰姆
2.)or Two Supply VoltagesYUH嘉泰姆
3.)Drive Dual Low Cost N-Channel MOSFETsYUH嘉泰姆
Adaptive Shoot-Through ProtectionYUH嘉泰姆
4.)Built-in Feedback CompensationYUH嘉泰姆
Voltage-Mode PWM ControlYUH嘉泰姆
0~100% Duty RatioYUH嘉泰姆
Fast Transient ResponseYUH嘉泰姆
5.)±2% 0.8V ReferenceYUH嘉泰姆
Over Line, Load Regulation, and Operating YUH嘉泰姆
6.)Temperature Programmable Over-Current ProtectionYUH嘉泰姆
Using RDS(ON) of Low-Side MOSFETYUH嘉泰姆
7.)Hiccup-Mode Under-Voltage ProtectionYUH嘉泰姆
8.)118% Over-Voltage ProtectionYUH嘉泰姆
9.)Adjustable Output VoltageYUH嘉泰姆
10.)Small Converter SizeYUH嘉泰姆
300kHz Constant Switching FrequencyYUH嘉泰姆
Small SOP-8 PackageYUH嘉泰姆
11.)Built-In Digital Soft-StartYUH嘉泰姆
12.)Shutdown Control Using an External MOSFETYUH嘉泰姆
13.)Lead Free and Green Devices AvailableYUH嘉泰姆
三,应用范围 (Applications)YUH嘉泰姆

MotherboardYUH嘉泰姆
Graphics CardYUH嘉泰姆
High Current, up to 20A, DC-DC ConvertersYUH嘉泰姆
四.下载产品资料PDF文档 YUH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！YUH嘉泰姆

QQ截图20160419174301.jpg YUH嘉泰姆

五,产品封装图 (Package)YUH嘉泰姆

YUH嘉泰姆

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

八,相关产品 更多同类产品...... YUH嘉泰姆

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Part_No YUH嘉泰姆	Package YUH嘉泰姆	ArchiYUH嘉泰姆 tectuYUH嘉泰姆	PhaseYUH嘉泰姆	No.ofYUH嘉泰姆 PWMYUH嘉泰姆 OutputYUH嘉泰姆	Output YUH嘉泰姆 CurrentYUH嘉泰姆 (A) YUH嘉泰姆	InputYUH嘉泰姆 Voltage (V) YUH嘉泰姆		ReferenceYUH嘉泰姆 VoltageYUH嘉泰姆 (V) YUH嘉泰姆	Bias YUH嘉泰姆 VoltageYUH嘉泰姆 (V) YUH嘉泰姆	QuiescentYUH嘉泰姆 CurrentYUH嘉泰姆 (uA) YUH嘉泰姆
Part_No YUH嘉泰姆	Package YUH嘉泰姆	ArchiYUH嘉泰姆 tectuYUH嘉泰姆	PhaseYUH嘉泰姆	No.ofYUH嘉泰姆 PWMYUH嘉泰姆 OutputYUH嘉泰姆	Output YUH嘉泰姆 CurrentYUH嘉泰姆 (A) YUH嘉泰姆	minYUH嘉泰姆	maxYUH嘉泰姆	ReferenceYUH嘉泰姆 VoltageYUH嘉泰姆 (V) YUH嘉泰姆	Bias YUH嘉泰姆 VoltageYUH嘉泰姆 (V) YUH嘉泰姆	QuiescentYUH嘉泰姆 CurrentYUH嘉泰姆 (uA) YUH嘉泰姆
CXSD6273YUH嘉泰姆	SOP-14YUH嘉泰姆 QSOP-16YUH嘉泰姆 QFN4x4-16YUH嘉泰姆	VM YUH嘉泰姆	1 YUH嘉泰姆	1 YUH嘉泰姆	30YUH嘉泰姆	2.9 YUH嘉泰姆	13.2YUH嘉泰姆	0.9YUH嘉泰姆	12 YUH嘉泰姆	8000YUH嘉泰姆
CXSD6274YUH嘉泰姆	SOP-8YUH嘉泰姆	VM YUH嘉泰姆	1YUH嘉泰姆	1YUH嘉泰姆	20YUH嘉泰姆	2.9 YUH嘉泰姆	13.2 YUH嘉泰姆	0.8YUH嘉泰姆	12YUH嘉泰姆	5000YUH嘉泰姆
CXSD6274CYUH嘉泰姆	SOP-8YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	1YUH嘉泰姆	20YUH嘉泰姆	2.9YUH嘉泰姆	13.2YUH嘉泰姆	0.8YUH嘉泰姆	12YUH嘉泰姆	5000YUH嘉泰姆
CXSD6275YUH嘉泰姆	QFN4x4-24YUH嘉泰姆	VMYUH嘉泰姆	2YUH嘉泰姆	1YUH嘉泰姆	60YUH嘉泰姆	3.1YUH嘉泰姆	13.2YUH嘉泰姆	0.6YUH嘉泰姆	12YUH嘉泰姆	5000YUH嘉泰姆
CXSD6276YUH嘉泰姆	SOP-8YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	1YUH嘉泰姆	20YUH嘉泰姆	2.2YUH嘉泰姆	13.2YUH嘉泰姆	0.8YUH嘉泰姆	5~12YUH嘉泰姆	2100YUH嘉泰姆
CXSD6276AYUH嘉泰姆	SOP-8YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	1YUH嘉泰姆	20YUH嘉泰姆	2.2YUH嘉泰姆	13.2YUH嘉泰姆	0.8YUH嘉泰姆	5~12YUH嘉泰姆	2100YUH嘉泰姆
CXSD6277/A/BYUH嘉泰姆	SOP8\|TSSOP8YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	1YUH嘉泰姆	5YUH嘉泰姆	5YUH嘉泰姆	13.2YUH嘉泰姆	1.25\|0.8YUH嘉泰姆	5~12YUH嘉泰姆	3000YUH嘉泰姆
CXSD6278YUH嘉泰姆	SOP-8YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	1YUH嘉泰姆	10YUH嘉泰姆	3.3YUH嘉泰姆	5.5YUH嘉泰姆	0.8YUH嘉泰姆	5YUH嘉泰姆	2100YUH嘉泰姆
CXSD6279BYUH嘉泰姆	SOP-14YUH嘉泰姆	VM YUH嘉泰姆	1YUH嘉泰姆	1YUH嘉泰姆	10YUH嘉泰姆	5YUH嘉泰姆	13.2YUH嘉泰姆	0.8YUH嘉泰姆	12YUH嘉泰姆	2000YUH嘉泰姆
CXSD6280YUH嘉泰姆	TSSOP-24YUH嘉泰姆 \|QFN5x5-32YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	2YUH嘉泰姆	20YUH嘉泰姆	5YUH嘉泰姆	13.2YUH嘉泰姆	0.6YUH嘉泰姆	5~12YUH嘉泰姆	4000YUH嘉泰姆
CXSD6281NYUH嘉泰姆	SOP14YUH嘉泰姆 QSOP16YUH嘉泰姆 QFN-16YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	1YUH嘉泰姆	30YUH嘉泰姆	2.9YUH嘉泰姆	13.2YUH嘉泰姆	0.9YUH嘉泰姆	12YUH嘉泰姆	4000YUH嘉泰姆
CXSD6282YUH嘉泰姆	SOP-14YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	1YUH嘉泰姆	30YUH嘉泰姆	2.2YUH嘉泰姆	13.2YUH嘉泰姆	0.6YUH嘉泰姆	12YUH嘉泰姆	5000YUH嘉泰姆
CXSD6282AYUH嘉泰姆	SOP-14YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	1YUH嘉泰姆	30YUH嘉泰姆	2.2YUH嘉泰姆	13.2YUH嘉泰姆	0.6YUH嘉泰姆	12YUH嘉泰姆	5000YUH嘉泰姆
CXSD6283YUH嘉泰姆	SOP-14YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	1YUH嘉泰姆	25YUH嘉泰姆	2.2YUH嘉泰姆	13.2YUH嘉泰姆	0.8YUH嘉泰姆	12YUH嘉泰姆	5000YUH嘉泰姆
CXSD6284/AYUH嘉泰姆	LQFP7x7 48YUH嘉泰姆 TQFN7x7-48YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	6YUH嘉泰姆	0.015YUH嘉泰姆	1.4YUH嘉泰姆	6.5YUH嘉泰姆	-YUH嘉泰姆	5YUH嘉泰姆	1800YUH嘉泰姆
CXSD6285YUH嘉泰姆	TSSOP-24PYUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	2YUH嘉泰姆	20YUH嘉泰姆	2.97YUH嘉泰姆	5.5YUH嘉泰姆	0.8YUH嘉泰姆	5~12YUH嘉泰姆	5000YUH嘉泰姆
CXSD6286YUH嘉泰姆	SOP-14YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	1YUH嘉泰姆	10YUH嘉泰姆	5YUH嘉泰姆	13.2YUH嘉泰姆	0.8YUH嘉泰姆	12YUH嘉泰姆	3000YUH嘉泰姆
CXSD6287YUH嘉泰姆	SOP-8-P\|DIP-8YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	1YUH嘉泰姆	30YUH嘉泰姆	2.9YUH嘉泰姆	13.2YUH嘉泰姆	1.2YUH嘉泰姆	12YUH嘉泰姆	3000YUH嘉泰姆
CXSD6288YUH嘉泰姆	SSOP28YUH嘉泰姆 QFN4x4-24YUH嘉泰姆	VMYUH嘉泰姆	1YUH嘉泰姆	2YUH嘉泰姆	20YUH嘉泰姆	5YUH嘉泰姆	24YUH嘉泰姆	0.9YUH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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