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

首页 > 新闻中心 > 行业新闻

发表时间：2020-04-21浏览次数：431

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

目录gT3嘉泰姆

1.产品概述         2.产品特点gT3嘉泰姆
3.应用范围       4.下载产品资料PDF文档 gT3嘉泰姆
5.产品封装图                     6.电路原理图             gT3嘉泰姆
7.功能概述       8.相关产品gT3嘉泰姆

一,产品概述(General Description) gT3嘉泰姆

The CXSD6276 CXSD6276A is a fixed 300kHz frequency, voltage mode, andgT3嘉泰姆
synchronous PWM controller. The device drives two low cost N-channelgT3嘉泰姆
MOSFETs and is de-signed to work with single 5~12V or two supplygT3嘉泰姆
voltage(s), providing excellent regulation for load transients.gT3嘉泰姆
The CXSD6276 CXSD6276A integrates controls, monitoring, and protection functionsgT3嘉泰姆
into a single 8-pin package to provide a low cost and perfect power solution.gT3嘉泰姆
A power-on-reset (POR) circuit monitors the VCC supply voltage to preventgT3嘉泰姆
wrong logic controls. An internal 0.8V reference provides low output voltagegT3嘉泰姆
down to 0.8V for further applications. An built-in digital soft-start with fixedgT3嘉泰姆
soft-start interval prevents the output voltage from overshoot as well as limitsgT3嘉泰姆
the input current. The controller’s over-current protection monitors the outputgT3嘉泰姆
current by using the voltage drop across the low-side MOSFET’s RDS(ON),gT3嘉泰姆
eliminating the need of a current sensing resistor. Additional under voltage andgT3嘉泰姆
over voltage protections monitor the voltage on FB pin for short-circuit andgT3嘉泰姆
over-voltage protections. The over-current protection cycles the soft-startgT3嘉泰姆
function until 4 over-current events are counted.Pulling and holding the voltagegT3嘉泰姆
on OCSET pin below 0.15V with an open drain device shuts down the controller.gT3嘉泰姆
二.产品特点(Features)gT3嘉泰姆

1.)Operating with Single 5~12V Supply VoltagegT3嘉泰姆
2.)or Two Supply VoltagesgT3嘉泰姆
3.)Drive Dual Low Cost N-Channel MOSFETsgT3嘉泰姆
Adaptive Shoot-Through ProtectiongT3嘉泰姆
4.)Built-in Feedback CompensationgT3嘉泰姆
Voltage-Mode PWM ControlgT3嘉泰姆
0~100% Duty RatiogT3嘉泰姆
Fast Transient ResponsegT3嘉泰姆
5.)±2% 0.8V ReferencegT3嘉泰姆
Over Line, Load Regulation, and Operating gT3嘉泰姆
6.)Temperature Programmable Over-Current ProtectiongT3嘉泰姆
Using RDS(ON) of Low-Side MOSFETgT3嘉泰姆
7.)Hiccup-Mode Under-Voltage ProtectiongT3嘉泰姆
8.)118% Over-Voltage ProtectiongT3嘉泰姆
9.)Adjustable Output VoltagegT3嘉泰姆
10.)Small Converter SizegT3嘉泰姆
300kHz Constant Switching FrequencygT3嘉泰姆
Small SOP-8 PackagegT3嘉泰姆
11.)Built-In Digital Soft-StartgT3嘉泰姆
12.)Shutdown Control Using an External MOSFETgT3嘉泰姆
13.)Lead Free and Green Devices AvailablegT3嘉泰姆
三,应用范围 (Applications)gT3嘉泰姆

MotherboardgT3嘉泰姆
Graphics CardgT3嘉泰姆
High Current, up to 20A, DC-DC ConvertersgT3嘉泰姆
四.下载产品资料PDF文档 gT3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！gT3嘉泰姆

QQ截图20160419174301.jpg gT3嘉泰姆

五,产品封装图 (Package)gT3嘉泰姆

gT3嘉泰姆

BOOT (Pin 1)gT3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.gT3嘉泰姆
UGATE (Pin 2)gT3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.gT3嘉泰姆
GND (Pin 3)gT3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.gT3嘉泰姆
LGATE (Pin 4)gT3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. gT3嘉泰姆
VCC (Pin 5)gT3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. gT3嘉泰姆
FB (Pin 6)gT3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 :gT3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. gT3嘉泰姆
OCSET (Pin 7)gT3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:gT3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.gT3嘉泰姆
PHASE (Pin 8) gT3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 sourcegT3嘉泰姆
六.电路原理图gT3嘉泰姆
gT3嘉泰姆
七,功能概述gT3嘉泰姆
Power-On-Reset (POR) gT3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. gT3嘉泰姆
Soft-StartgT3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-gT3嘉泰姆
ence voltage. The soft-start interval is about 3.2mstypical, independent of the converter’s input and out-put voltages.gT3嘉泰姆
Over-Current Protection (OCP)gT3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 thegT3嘉泰姆
Over-Current Protection (OCP) (Cont.)gT3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 gT3嘉泰姆

八,相关产品 更多同类产品...... gT3嘉泰姆

Switching Regulator > Buck ControllergT3嘉泰姆
Part_No gT3嘉泰姆	Package gT3嘉泰姆	ArchigT3嘉泰姆 tectugT3嘉泰姆	PhasegT3嘉泰姆	No.ofgT3嘉泰姆 PWMgT3嘉泰姆 OutputgT3嘉泰姆	Output gT3嘉泰姆 CurrentgT3嘉泰姆 (A) gT3嘉泰姆	InputgT3嘉泰姆 Voltage (V) gT3嘉泰姆		ReferencegT3嘉泰姆 VoltagegT3嘉泰姆 (V) gT3嘉泰姆	Bias gT3嘉泰姆 VoltagegT3嘉泰姆 (V) gT3嘉泰姆	QuiescentgT3嘉泰姆 CurrentgT3嘉泰姆 (uA) gT3嘉泰姆
Part_No gT3嘉泰姆	Package gT3嘉泰姆	ArchigT3嘉泰姆 tectugT3嘉泰姆	PhasegT3嘉泰姆	No.ofgT3嘉泰姆 PWMgT3嘉泰姆 OutputgT3嘉泰姆	Output gT3嘉泰姆 CurrentgT3嘉泰姆 (A) gT3嘉泰姆	mingT3嘉泰姆	maxgT3嘉泰姆	ReferencegT3嘉泰姆 VoltagegT3嘉泰姆 (V) gT3嘉泰姆	Bias gT3嘉泰姆 VoltagegT3嘉泰姆 (V) gT3嘉泰姆	QuiescentgT3嘉泰姆 CurrentgT3嘉泰姆 (uA) gT3嘉泰姆
CXSD6273gT3嘉泰姆	SOP-14gT3嘉泰姆 QSOP-16gT3嘉泰姆 QFN4x4-16gT3嘉泰姆	VM gT3嘉泰姆	1 gT3嘉泰姆	1 gT3嘉泰姆	30gT3嘉泰姆	2.9 gT3嘉泰姆	13.2gT3嘉泰姆	0.9gT3嘉泰姆	12 gT3嘉泰姆	8000gT3嘉泰姆
CXSD6274gT3嘉泰姆	SOP-8gT3嘉泰姆	VM gT3嘉泰姆	1gT3嘉泰姆	1gT3嘉泰姆	20gT3嘉泰姆	2.9 gT3嘉泰姆	13.2 gT3嘉泰姆	0.8gT3嘉泰姆	12gT3嘉泰姆	5000gT3嘉泰姆
CXSD6274CgT3嘉泰姆	SOP-8gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	1gT3嘉泰姆	20gT3嘉泰姆	2.9gT3嘉泰姆	13.2gT3嘉泰姆	0.8gT3嘉泰姆	12gT3嘉泰姆	5000gT3嘉泰姆
CXSD6275gT3嘉泰姆	QFN4x4-24gT3嘉泰姆	VMgT3嘉泰姆	2gT3嘉泰姆	1gT3嘉泰姆	60gT3嘉泰姆	3.1gT3嘉泰姆	13.2gT3嘉泰姆	0.6gT3嘉泰姆	12gT3嘉泰姆	5000gT3嘉泰姆
CXSD6276gT3嘉泰姆	SOP-8gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	1gT3嘉泰姆	20gT3嘉泰姆	2.2gT3嘉泰姆	13.2gT3嘉泰姆	0.8gT3嘉泰姆	5~12gT3嘉泰姆	2100gT3嘉泰姆
CXSD6276AgT3嘉泰姆	SOP-8gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	1gT3嘉泰姆	20gT3嘉泰姆	2.2gT3嘉泰姆	13.2gT3嘉泰姆	0.8gT3嘉泰姆	5~12gT3嘉泰姆	2100gT3嘉泰姆
CXSD6277/A/BgT3嘉泰姆	SOP8\|TSSOP8gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	1gT3嘉泰姆	5gT3嘉泰姆	5gT3嘉泰姆	13.2gT3嘉泰姆	1.25\|0.8gT3嘉泰姆	5~12gT3嘉泰姆	3000gT3嘉泰姆
CXSD6278gT3嘉泰姆	SOP-8gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	1gT3嘉泰姆	10gT3嘉泰姆	3.3gT3嘉泰姆	5.5gT3嘉泰姆	0.8gT3嘉泰姆	5gT3嘉泰姆	2100gT3嘉泰姆
CXSD6279BgT3嘉泰姆	SOP-14gT3嘉泰姆	VM gT3嘉泰姆	1gT3嘉泰姆	1gT3嘉泰姆	10gT3嘉泰姆	5gT3嘉泰姆	13.2gT3嘉泰姆	0.8gT3嘉泰姆	12gT3嘉泰姆	2000gT3嘉泰姆
CXSD6280gT3嘉泰姆	TSSOP-24gT3嘉泰姆 \|QFN5x5-32gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	2gT3嘉泰姆	20gT3嘉泰姆	5gT3嘉泰姆	13.2gT3嘉泰姆	0.6gT3嘉泰姆	5~12gT3嘉泰姆	4000gT3嘉泰姆
CXSD6281NgT3嘉泰姆	SOP14gT3嘉泰姆 QSOP16gT3嘉泰姆 QFN-16gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	1gT3嘉泰姆	30gT3嘉泰姆	2.9gT3嘉泰姆	13.2gT3嘉泰姆	0.9gT3嘉泰姆	12gT3嘉泰姆	4000gT3嘉泰姆
CXSD6282gT3嘉泰姆	SOP-14gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	1gT3嘉泰姆	30gT3嘉泰姆	2.2gT3嘉泰姆	13.2gT3嘉泰姆	0.6gT3嘉泰姆	12gT3嘉泰姆	5000gT3嘉泰姆
CXSD6282AgT3嘉泰姆	SOP-14gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	1gT3嘉泰姆	30gT3嘉泰姆	2.2gT3嘉泰姆	13.2gT3嘉泰姆	0.6gT3嘉泰姆	12gT3嘉泰姆	5000gT3嘉泰姆
CXSD6283gT3嘉泰姆	SOP-14gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	1gT3嘉泰姆	25gT3嘉泰姆	2.2gT3嘉泰姆	13.2gT3嘉泰姆	0.8gT3嘉泰姆	12gT3嘉泰姆	5000gT3嘉泰姆
CXSD6284/AgT3嘉泰姆	LQFP7x7 48gT3嘉泰姆 TQFN7x7-48gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	6gT3嘉泰姆	0.015gT3嘉泰姆	1.4gT3嘉泰姆	6.5gT3嘉泰姆	-gT3嘉泰姆	5gT3嘉泰姆	1800gT3嘉泰姆
CXSD6285gT3嘉泰姆	TSSOP-24PgT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	2gT3嘉泰姆	20gT3嘉泰姆	2.97gT3嘉泰姆	5.5gT3嘉泰姆	0.8gT3嘉泰姆	5~12gT3嘉泰姆	5000gT3嘉泰姆
CXSD6286gT3嘉泰姆	SOP-14gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	1gT3嘉泰姆	10gT3嘉泰姆	5gT3嘉泰姆	13.2gT3嘉泰姆	0.8gT3嘉泰姆	12gT3嘉泰姆	3000gT3嘉泰姆
CXSD6287gT3嘉泰姆	SOP-8-P\|DIP-8gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	1gT3嘉泰姆	30gT3嘉泰姆	2.9gT3嘉泰姆	13.2gT3嘉泰姆	1.2gT3嘉泰姆	12gT3嘉泰姆	3000gT3嘉泰姆
CXSD6288gT3嘉泰姆	SSOP28gT3嘉泰姆 QFN4x4-24gT3嘉泰姆	VMgT3嘉泰姆	1gT3嘉泰姆	2gT3嘉泰姆	20gT3嘉泰姆	5gT3嘉泰姆	24gT3嘉泰姆	0.9gT3嘉泰姆

上一篇：CXSD6275两相PWM控制芯片它为图形卡应用中的高级图形微处理器提供了一个精确的电压调节系统功率MOSFET驱动器

下一篇：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

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