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：289

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8l5嘉泰姆

1.产品概述         2.产品特点8l5嘉泰姆
3.应用范围       4.下载产品资料PDF文档 8l5嘉泰姆
5.产品封装图                     6.电路原理图             8l5嘉泰姆
7.功能概述       8.相关产品8l5嘉泰姆

一,产品概述(General Description) 8l5嘉泰姆

The CXSD6276 CXSD6276A is a fixed 300kHz frequency, voltage mode, and8l5嘉泰姆
synchronous PWM controller. The device drives two low cost N-channel8l5嘉泰姆
MOSFETs and is de-signed to work with single 5~12V or two supply8l5嘉泰姆
voltage(s), providing excellent regulation for load transients.8l5嘉泰姆
The CXSD6276 CXSD6276A integrates controls, monitoring, and protection functions8l5嘉泰姆
into a single 8-pin package to provide a low cost and perfect power solution.8l5嘉泰姆
A power-on-reset (POR) circuit monitors the VCC supply voltage to prevent8l5嘉泰姆
wrong logic controls. An internal 0.8V reference provides low output voltage8l5嘉泰姆
down to 0.8V for further applications. An built-in digital soft-start with fixed8l5嘉泰姆
soft-start interval prevents the output voltage from overshoot as well as limits8l5嘉泰姆
the input current. The controller’s over-current protection monitors the output8l5嘉泰姆
current by using the voltage drop across the low-side MOSFET’s RDS(ON),8l5嘉泰姆
eliminating the need of a current sensing resistor. Additional under voltage and8l5嘉泰姆
over voltage protections monitor the voltage on FB pin for short-circuit and8l5嘉泰姆
over-voltage protections. The over-current protection cycles the soft-start8l5嘉泰姆
function until 4 over-current events are counted.Pulling and holding the voltage8l5嘉泰姆
on OCSET pin below 0.15V with an open drain device shuts down the controller.8l5嘉泰姆
二.产品特点(Features)8l5嘉泰姆

1.)Operating with Single 5~12V Supply Voltage8l5嘉泰姆
2.)or Two Supply Voltages8l5嘉泰姆
3.)Drive Dual Low Cost N-Channel MOSFETs8l5嘉泰姆
Adaptive Shoot-Through Protection8l5嘉泰姆
4.)Built-in Feedback Compensation8l5嘉泰姆
Voltage-Mode PWM Control8l5嘉泰姆
0~100% Duty Ratio8l5嘉泰姆
Fast Transient Response8l5嘉泰姆
5.)±2% 0.8V Reference8l5嘉泰姆
Over Line, Load Regulation, and Operating 8l5嘉泰姆
6.)Temperature Programmable Over-Current Protection8l5嘉泰姆
Using RDS(ON) of Low-Side MOSFET8l5嘉泰姆
7.)Hiccup-Mode Under-Voltage Protection8l5嘉泰姆
8.)118% Over-Voltage Protection8l5嘉泰姆
9.)Adjustable Output Voltage8l5嘉泰姆
10.)Small Converter Size8l5嘉泰姆
300kHz Constant Switching Frequency8l5嘉泰姆
Small SOP-8 Package8l5嘉泰姆
11.)Built-In Digital Soft-Start8l5嘉泰姆
12.)Shutdown Control Using an External MOSFET8l5嘉泰姆
13.)Lead Free and Green Devices Available8l5嘉泰姆
三,应用范围 (Applications)8l5嘉泰姆

Motherboard8l5嘉泰姆
Graphics Card8l5嘉泰姆
High Current, up to 20A, DC-DC Converters8l5嘉泰姆
四.下载产品资料PDF文档 8l5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！8l5嘉泰姆

QQ截图20160419174301.jpg 8l5嘉泰姆

五,产品封装图 (Package)8l5嘉泰姆

8l5嘉泰姆

BOOT (Pin 1)8l5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.8l5嘉泰姆
UGATE (Pin 2)8l5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.8l5嘉泰姆
GND (Pin 3)8l5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.8l5嘉泰姆
LGATE (Pin 4)8l5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. 8l5嘉泰姆
VCC (Pin 5)8l5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. 8l5嘉泰姆
FB (Pin 6)8l5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 :8l5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. 8l5嘉泰姆
OCSET (Pin 7)8l5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:8l5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.8l5嘉泰姆
PHASE (Pin 8) 8l5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 source8l5嘉泰姆
六.电路原理图8l5嘉泰姆
8l5嘉泰姆
七,功能概述8l5嘉泰姆
Power-On-Reset (POR) 8l5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. 8l5嘉泰姆
Soft-Start8l5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-8l5嘉泰姆
ence voltage. The soft-start interval is about 3.2mstypical, independent of the converter’s input and out-put voltages.8l5嘉泰姆
Over-Current Protection (OCP)8l5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 the8l5嘉泰姆
Over-Current Protection (OCP) (Cont.)8l5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 8l5嘉泰姆

八,相关产品 更多同类产品...... 8l5嘉泰姆

Switching Regulator > Buck Controller8l5嘉泰姆
Part_No 8l5嘉泰姆	Package 8l5嘉泰姆	Archi8l5嘉泰姆 tectu8l5嘉泰姆	Phase8l5嘉泰姆	No.of8l5嘉泰姆 PWM8l5嘉泰姆 Output8l5嘉泰姆	Output 8l5嘉泰姆 Current8l5嘉泰姆 (A) 8l5嘉泰姆	Input8l5嘉泰姆 Voltage (V) 8l5嘉泰姆		Reference8l5嘉泰姆 Voltage8l5嘉泰姆 (V) 8l5嘉泰姆	Bias 8l5嘉泰姆 Voltage8l5嘉泰姆 (V) 8l5嘉泰姆	Quiescent8l5嘉泰姆 Current8l5嘉泰姆 (uA) 8l5嘉泰姆
Part_No 8l5嘉泰姆	Package 8l5嘉泰姆	Archi8l5嘉泰姆 tectu8l5嘉泰姆	Phase8l5嘉泰姆	No.of8l5嘉泰姆 PWM8l5嘉泰姆 Output8l5嘉泰姆	Output 8l5嘉泰姆 Current8l5嘉泰姆 (A) 8l5嘉泰姆	min8l5嘉泰姆	max8l5嘉泰姆	Reference8l5嘉泰姆 Voltage8l5嘉泰姆 (V) 8l5嘉泰姆	Bias 8l5嘉泰姆 Voltage8l5嘉泰姆 (V) 8l5嘉泰姆	Quiescent8l5嘉泰姆 Current8l5嘉泰姆 (uA) 8l5嘉泰姆
CXSD62738l5嘉泰姆	SOP-148l5嘉泰姆 QSOP-168l5嘉泰姆 QFN4x4-168l5嘉泰姆	VM 8l5嘉泰姆	1 8l5嘉泰姆	1 8l5嘉泰姆	308l5嘉泰姆	2.9 8l5嘉泰姆	13.28l5嘉泰姆	0.98l5嘉泰姆	12 8l5嘉泰姆	80008l5嘉泰姆
CXSD62748l5嘉泰姆	SOP-88l5嘉泰姆	VM 8l5嘉泰姆	18l5嘉泰姆	18l5嘉泰姆	208l5嘉泰姆	2.9 8l5嘉泰姆	13.2 8l5嘉泰姆	0.88l5嘉泰姆	128l5嘉泰姆	50008l5嘉泰姆
CXSD6274C8l5嘉泰姆	SOP-88l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	18l5嘉泰姆	208l5嘉泰姆	2.98l5嘉泰姆	13.28l5嘉泰姆	0.88l5嘉泰姆	128l5嘉泰姆	50008l5嘉泰姆
CXSD62758l5嘉泰姆	QFN4x4-248l5嘉泰姆	VM8l5嘉泰姆	28l5嘉泰姆	18l5嘉泰姆	608l5嘉泰姆	3.18l5嘉泰姆	13.28l5嘉泰姆	0.68l5嘉泰姆	128l5嘉泰姆	50008l5嘉泰姆
CXSD62768l5嘉泰姆	SOP-88l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	18l5嘉泰姆	208l5嘉泰姆	2.28l5嘉泰姆	13.28l5嘉泰姆	0.88l5嘉泰姆	5~128l5嘉泰姆	21008l5嘉泰姆
CXSD6276A8l5嘉泰姆	SOP-88l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	18l5嘉泰姆	208l5嘉泰姆	2.28l5嘉泰姆	13.28l5嘉泰姆	0.88l5嘉泰姆	5~128l5嘉泰姆	21008l5嘉泰姆
CXSD6277/A/B8l5嘉泰姆	SOP8\|TSSOP88l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	18l5嘉泰姆	58l5嘉泰姆	58l5嘉泰姆	13.28l5嘉泰姆	1.25\|0.88l5嘉泰姆	5~128l5嘉泰姆	30008l5嘉泰姆
CXSD62788l5嘉泰姆	SOP-88l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	18l5嘉泰姆	108l5嘉泰姆	3.38l5嘉泰姆	5.58l5嘉泰姆	0.88l5嘉泰姆	58l5嘉泰姆	21008l5嘉泰姆
CXSD6279B8l5嘉泰姆	SOP-148l5嘉泰姆	VM 8l5嘉泰姆	18l5嘉泰姆	18l5嘉泰姆	108l5嘉泰姆	58l5嘉泰姆	13.28l5嘉泰姆	0.88l5嘉泰姆	128l5嘉泰姆	20008l5嘉泰姆
CXSD62808l5嘉泰姆	TSSOP-248l5嘉泰姆 \|QFN5x5-328l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	28l5嘉泰姆	208l5嘉泰姆	58l5嘉泰姆	13.28l5嘉泰姆	0.68l5嘉泰姆	5~128l5嘉泰姆	40008l5嘉泰姆
CXSD6281N8l5嘉泰姆	SOP148l5嘉泰姆 QSOP168l5嘉泰姆 QFN-168l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	18l5嘉泰姆	308l5嘉泰姆	2.98l5嘉泰姆	13.28l5嘉泰姆	0.98l5嘉泰姆	128l5嘉泰姆	40008l5嘉泰姆
CXSD62828l5嘉泰姆	SOP-148l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	18l5嘉泰姆	308l5嘉泰姆	2.28l5嘉泰姆	13.28l5嘉泰姆	0.68l5嘉泰姆	128l5嘉泰姆	50008l5嘉泰姆
CXSD6282A8l5嘉泰姆	SOP-148l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	18l5嘉泰姆	308l5嘉泰姆	2.28l5嘉泰姆	13.28l5嘉泰姆	0.68l5嘉泰姆	128l5嘉泰姆	50008l5嘉泰姆
CXSD62838l5嘉泰姆	SOP-148l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	18l5嘉泰姆	258l5嘉泰姆	2.28l5嘉泰姆	13.28l5嘉泰姆	0.88l5嘉泰姆	128l5嘉泰姆	50008l5嘉泰姆
CXSD6284/A8l5嘉泰姆	LQFP7x7 488l5嘉泰姆 TQFN7x7-488l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	68l5嘉泰姆	0.0158l5嘉泰姆	1.48l5嘉泰姆	6.58l5嘉泰姆	-8l5嘉泰姆	58l5嘉泰姆	18008l5嘉泰姆
CXSD62858l5嘉泰姆	TSSOP-24P8l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	28l5嘉泰姆	208l5嘉泰姆	2.978l5嘉泰姆	5.58l5嘉泰姆	0.88l5嘉泰姆	5~128l5嘉泰姆	50008l5嘉泰姆
CXSD62868l5嘉泰姆	SOP-148l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	18l5嘉泰姆	108l5嘉泰姆	58l5嘉泰姆	13.28l5嘉泰姆	0.88l5嘉泰姆	128l5嘉泰姆	30008l5嘉泰姆
CXSD62878l5嘉泰姆	SOP-8-P\|DIP-88l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	18l5嘉泰姆	308l5嘉泰姆	2.98l5嘉泰姆	13.28l5嘉泰姆	1.28l5嘉泰姆	128l5嘉泰姆	30008l5嘉泰姆
CXSD62888l5嘉泰姆	SSOP288l5嘉泰姆 QFN4x4-248l5嘉泰姆	VM8l5嘉泰姆	18l5嘉泰姆	28l5嘉泰姆	208l5嘉泰姆	58l5嘉泰姆	248l5嘉泰姆	0.98l5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