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：215

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c6r嘉泰姆

1.产品概述         2.产品特点c6r嘉泰姆
3.应用范围       4.下载产品资料PDF文档 c6r嘉泰姆
5.产品封装图                     6.电路原理图             c6r嘉泰姆
7.功能概述       8.相关产品c6r嘉泰姆

一,产品概述(General Description) c6r嘉泰姆

The CXSD6276 CXSD6276A is a fixed 300kHz frequency, voltage mode, andc6r嘉泰姆
synchronous PWM controller. The device drives two low cost N-channelc6r嘉泰姆
MOSFETs and is de-signed to work with single 5~12V or two supplyc6r嘉泰姆
voltage(s), providing excellent regulation for load transients.c6r嘉泰姆
The CXSD6276 CXSD6276A integrates controls, monitoring, and protection functionsc6r嘉泰姆
into a single 8-pin package to provide a low cost and perfect power solution.c6r嘉泰姆
A power-on-reset (POR) circuit monitors the VCC supply voltage to preventc6r嘉泰姆
wrong logic controls. An internal 0.8V reference provides low output voltagec6r嘉泰姆
down to 0.8V for further applications. An built-in digital soft-start with fixedc6r嘉泰姆
soft-start interval prevents the output voltage from overshoot as well as limitsc6r嘉泰姆
the input current. The controller’s over-current protection monitors the outputc6r嘉泰姆
current by using the voltage drop across the low-side MOSFET’s RDS(ON),c6r嘉泰姆
eliminating the need of a current sensing resistor. Additional under voltage andc6r嘉泰姆
over voltage protections monitor the voltage on FB pin for short-circuit andc6r嘉泰姆
over-voltage protections. The over-current protection cycles the soft-startc6r嘉泰姆
function until 4 over-current events are counted.Pulling and holding the voltagec6r嘉泰姆
on OCSET pin below 0.15V with an open drain device shuts down the controller.c6r嘉泰姆
二.产品特点(Features)c6r嘉泰姆

1.)Operating with Single 5~12V Supply Voltagec6r嘉泰姆
2.)or Two Supply Voltagesc6r嘉泰姆
3.)Drive Dual Low Cost N-Channel MOSFETsc6r嘉泰姆
Adaptive Shoot-Through Protectionc6r嘉泰姆
4.)Built-in Feedback Compensationc6r嘉泰姆
Voltage-Mode PWM Controlc6r嘉泰姆
0~100% Duty Ratioc6r嘉泰姆
Fast Transient Responsec6r嘉泰姆
5.)±2% 0.8V Referencec6r嘉泰姆
Over Line, Load Regulation, and Operating c6r嘉泰姆
6.)Temperature Programmable Over-Current Protectionc6r嘉泰姆
Using RDS(ON) of Low-Side MOSFETc6r嘉泰姆
7.)Hiccup-Mode Under-Voltage Protectionc6r嘉泰姆
8.)118% Over-Voltage Protectionc6r嘉泰姆
9.)Adjustable Output Voltagec6r嘉泰姆
10.)Small Converter Sizec6r嘉泰姆
300kHz Constant Switching Frequencyc6r嘉泰姆
Small SOP-8 Packagec6r嘉泰姆
11.)Built-In Digital Soft-Startc6r嘉泰姆
12.)Shutdown Control Using an External MOSFETc6r嘉泰姆
13.)Lead Free and Green Devices Availablec6r嘉泰姆
三,应用范围 (Applications)c6r嘉泰姆

Motherboardc6r嘉泰姆
Graphics Cardc6r嘉泰姆
High Current, up to 20A, DC-DC Convertersc6r嘉泰姆
四.下载产品资料PDF文档 c6r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！c6r嘉泰姆

QQ截图20160419174301.jpg c6r嘉泰姆

五,产品封装图 (Package)c6r嘉泰姆

c6r嘉泰姆

BOOT (Pin 1)c6r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.c6r嘉泰姆
UGATE (Pin 2)c6r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.c6r嘉泰姆
GND (Pin 3)c6r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.c6r嘉泰姆
LGATE (Pin 4)c6r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. c6r嘉泰姆
VCC (Pin 5)c6r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. c6r嘉泰姆
FB (Pin 6)c6r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 :c6r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. c6r嘉泰姆
OCSET (Pin 7)c6r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:c6r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.c6r嘉泰姆
PHASE (Pin 8) c6r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 sourcec6r嘉泰姆
六.电路原理图c6r嘉泰姆
c6r嘉泰姆
七,功能概述c6r嘉泰姆
Power-On-Reset (POR) c6r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. c6r嘉泰姆
Soft-Startc6r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-c6r嘉泰姆
ence voltage. The soft-start interval is about 3.2mstypical, independent of the converter’s input and out-put voltages.c6r嘉泰姆
Over-Current Protection (OCP)c6r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 thec6r嘉泰姆
Over-Current Protection (OCP) (Cont.)c6r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 c6r嘉泰姆

八,相关产品 更多同类产品...... c6r嘉泰姆

Switching Regulator > Buck Controllerc6r嘉泰姆
Part_No c6r嘉泰姆	Package c6r嘉泰姆	Archic6r嘉泰姆 tectuc6r嘉泰姆	Phasec6r嘉泰姆	No.ofc6r嘉泰姆 PWMc6r嘉泰姆 Outputc6r嘉泰姆	Output c6r嘉泰姆 Currentc6r嘉泰姆 (A) c6r嘉泰姆	Inputc6r嘉泰姆 Voltage (V) c6r嘉泰姆		Referencec6r嘉泰姆 Voltagec6r嘉泰姆 (V) c6r嘉泰姆	Bias c6r嘉泰姆 Voltagec6r嘉泰姆 (V) c6r嘉泰姆	Quiescentc6r嘉泰姆 Currentc6r嘉泰姆 (uA) c6r嘉泰姆
Part_No c6r嘉泰姆	Package c6r嘉泰姆	Archic6r嘉泰姆 tectuc6r嘉泰姆	Phasec6r嘉泰姆	No.ofc6r嘉泰姆 PWMc6r嘉泰姆 Outputc6r嘉泰姆	Output c6r嘉泰姆 Currentc6r嘉泰姆 (A) c6r嘉泰姆	minc6r嘉泰姆	maxc6r嘉泰姆	Referencec6r嘉泰姆 Voltagec6r嘉泰姆 (V) c6r嘉泰姆	Bias c6r嘉泰姆 Voltagec6r嘉泰姆 (V) c6r嘉泰姆	Quiescentc6r嘉泰姆 Currentc6r嘉泰姆 (uA) c6r嘉泰姆
CXSD6273c6r嘉泰姆	SOP-14c6r嘉泰姆 QSOP-16c6r嘉泰姆 QFN4x4-16c6r嘉泰姆	VM c6r嘉泰姆	1 c6r嘉泰姆	1 c6r嘉泰姆	30c6r嘉泰姆	2.9 c6r嘉泰姆	13.2c6r嘉泰姆	0.9c6r嘉泰姆	12 c6r嘉泰姆	8000c6r嘉泰姆
CXSD6274c6r嘉泰姆	SOP-8c6r嘉泰姆	VM c6r嘉泰姆	1c6r嘉泰姆	1c6r嘉泰姆	20c6r嘉泰姆	2.9 c6r嘉泰姆	13.2 c6r嘉泰姆	0.8c6r嘉泰姆	12c6r嘉泰姆	5000c6r嘉泰姆
CXSD6274Cc6r嘉泰姆	SOP-8c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	1c6r嘉泰姆	20c6r嘉泰姆	2.9c6r嘉泰姆	13.2c6r嘉泰姆	0.8c6r嘉泰姆	12c6r嘉泰姆	5000c6r嘉泰姆
CXSD6275c6r嘉泰姆	QFN4x4-24c6r嘉泰姆	VMc6r嘉泰姆	2c6r嘉泰姆	1c6r嘉泰姆	60c6r嘉泰姆	3.1c6r嘉泰姆	13.2c6r嘉泰姆	0.6c6r嘉泰姆	12c6r嘉泰姆	5000c6r嘉泰姆
CXSD6276c6r嘉泰姆	SOP-8c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	1c6r嘉泰姆	20c6r嘉泰姆	2.2c6r嘉泰姆	13.2c6r嘉泰姆	0.8c6r嘉泰姆	5~12c6r嘉泰姆	2100c6r嘉泰姆
CXSD6276Ac6r嘉泰姆	SOP-8c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	1c6r嘉泰姆	20c6r嘉泰姆	2.2c6r嘉泰姆	13.2c6r嘉泰姆	0.8c6r嘉泰姆	5~12c6r嘉泰姆	2100c6r嘉泰姆
CXSD6277/A/Bc6r嘉泰姆	SOP8\|TSSOP8c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	1c6r嘉泰姆	5c6r嘉泰姆	5c6r嘉泰姆	13.2c6r嘉泰姆	1.25\|0.8c6r嘉泰姆	5~12c6r嘉泰姆	3000c6r嘉泰姆
CXSD6278c6r嘉泰姆	SOP-8c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	1c6r嘉泰姆	10c6r嘉泰姆	3.3c6r嘉泰姆	5.5c6r嘉泰姆	0.8c6r嘉泰姆	5c6r嘉泰姆	2100c6r嘉泰姆
CXSD6279Bc6r嘉泰姆	SOP-14c6r嘉泰姆	VM c6r嘉泰姆	1c6r嘉泰姆	1c6r嘉泰姆	10c6r嘉泰姆	5c6r嘉泰姆	13.2c6r嘉泰姆	0.8c6r嘉泰姆	12c6r嘉泰姆	2000c6r嘉泰姆
CXSD6280c6r嘉泰姆	TSSOP-24c6r嘉泰姆 \|QFN5x5-32c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	2c6r嘉泰姆	20c6r嘉泰姆	5c6r嘉泰姆	13.2c6r嘉泰姆	0.6c6r嘉泰姆	5~12c6r嘉泰姆	4000c6r嘉泰姆
CXSD6281Nc6r嘉泰姆	SOP14c6r嘉泰姆 QSOP16c6r嘉泰姆 QFN-16c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	1c6r嘉泰姆	30c6r嘉泰姆	2.9c6r嘉泰姆	13.2c6r嘉泰姆	0.9c6r嘉泰姆	12c6r嘉泰姆	4000c6r嘉泰姆
CXSD6282c6r嘉泰姆	SOP-14c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	1c6r嘉泰姆	30c6r嘉泰姆	2.2c6r嘉泰姆	13.2c6r嘉泰姆	0.6c6r嘉泰姆	12c6r嘉泰姆	5000c6r嘉泰姆
CXSD6282Ac6r嘉泰姆	SOP-14c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	1c6r嘉泰姆	30c6r嘉泰姆	2.2c6r嘉泰姆	13.2c6r嘉泰姆	0.6c6r嘉泰姆	12c6r嘉泰姆	5000c6r嘉泰姆
CXSD6283c6r嘉泰姆	SOP-14c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	1c6r嘉泰姆	25c6r嘉泰姆	2.2c6r嘉泰姆	13.2c6r嘉泰姆	0.8c6r嘉泰姆	12c6r嘉泰姆	5000c6r嘉泰姆
CXSD6284/Ac6r嘉泰姆	LQFP7x7 48c6r嘉泰姆 TQFN7x7-48c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	6c6r嘉泰姆	0.015c6r嘉泰姆	1.4c6r嘉泰姆	6.5c6r嘉泰姆	-c6r嘉泰姆	5c6r嘉泰姆	1800c6r嘉泰姆
CXSD6285c6r嘉泰姆	TSSOP-24Pc6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	2c6r嘉泰姆	20c6r嘉泰姆	2.97c6r嘉泰姆	5.5c6r嘉泰姆	0.8c6r嘉泰姆	5~12c6r嘉泰姆	5000c6r嘉泰姆
CXSD6286c6r嘉泰姆	SOP-14c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	1c6r嘉泰姆	10c6r嘉泰姆	5c6r嘉泰姆	13.2c6r嘉泰姆	0.8c6r嘉泰姆	12c6r嘉泰姆	3000c6r嘉泰姆
CXSD6287c6r嘉泰姆	SOP-8-P\|DIP-8c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	1c6r嘉泰姆	30c6r嘉泰姆	2.9c6r嘉泰姆	13.2c6r嘉泰姆	1.2c6r嘉泰姆	12c6r嘉泰姆	3000c6r嘉泰姆
CXSD6288c6r嘉泰姆	SSOP28c6r嘉泰姆 QFN4x4-24c6r嘉泰姆	VMc6r嘉泰姆	1c6r嘉泰姆	2c6r嘉泰姆	20c6r嘉泰姆	5c6r嘉泰姆	24c6r嘉泰姆	0.9c6r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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