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

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发表时间：2020-04-21浏览次数：420

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GUz嘉泰姆

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

一,产品概述(General Description) GUz嘉泰姆

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

1.)Operating with Single 5~12V Supply VoltageGUz嘉泰姆
2.)or Two Supply VoltagesGUz嘉泰姆
3.)Drive Dual Low Cost N-Channel MOSFETsGUz嘉泰姆
Adaptive Shoot-Through ProtectionGUz嘉泰姆
4.)Built-in Feedback CompensationGUz嘉泰姆
Voltage-Mode PWM ControlGUz嘉泰姆
0~100% Duty RatioGUz嘉泰姆
Fast Transient ResponseGUz嘉泰姆
5.)±2% 0.8V ReferenceGUz嘉泰姆
Over Line, Load Regulation, and Operating GUz嘉泰姆
6.)Temperature Programmable Over-Current ProtectionGUz嘉泰姆
Using RDS(ON) of Low-Side MOSFETGUz嘉泰姆
7.)Hiccup-Mode Under-Voltage ProtectionGUz嘉泰姆
8.)118% Over-Voltage ProtectionGUz嘉泰姆
9.)Adjustable Output VoltageGUz嘉泰姆
10.)Small Converter SizeGUz嘉泰姆
300kHz Constant Switching FrequencyGUz嘉泰姆
Small SOP-8 PackageGUz嘉泰姆
11.)Built-In Digital Soft-StartGUz嘉泰姆
12.)Shutdown Control Using an External MOSFETGUz嘉泰姆
13.)Lead Free and Green Devices AvailableGUz嘉泰姆
三,应用范围 (Applications)GUz嘉泰姆

MotherboardGUz嘉泰姆
Graphics CardGUz嘉泰姆
High Current, up to 20A, DC-DC ConvertersGUz嘉泰姆
四.下载产品资料PDF文档 GUz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！GUz嘉泰姆

QQ截图20160419174301.jpg GUz嘉泰姆

五,产品封装图 (Package)GUz嘉泰姆

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

八,相关产品 更多同类产品...... GUz嘉泰姆

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Part_No GUz嘉泰姆	Package GUz嘉泰姆	ArchiGUz嘉泰姆 tectuGUz嘉泰姆	PhaseGUz嘉泰姆	No.ofGUz嘉泰姆 PWMGUz嘉泰姆 OutputGUz嘉泰姆	Output GUz嘉泰姆 CurrentGUz嘉泰姆 (A) GUz嘉泰姆	InputGUz嘉泰姆 Voltage (V) GUz嘉泰姆		ReferenceGUz嘉泰姆 VoltageGUz嘉泰姆 (V) GUz嘉泰姆	Bias GUz嘉泰姆 VoltageGUz嘉泰姆 (V) GUz嘉泰姆	QuiescentGUz嘉泰姆 CurrentGUz嘉泰姆 (uA) GUz嘉泰姆
Part_No GUz嘉泰姆	Package GUz嘉泰姆	ArchiGUz嘉泰姆 tectuGUz嘉泰姆	PhaseGUz嘉泰姆	No.ofGUz嘉泰姆 PWMGUz嘉泰姆 OutputGUz嘉泰姆	Output GUz嘉泰姆 CurrentGUz嘉泰姆 (A) GUz嘉泰姆	minGUz嘉泰姆	maxGUz嘉泰姆	ReferenceGUz嘉泰姆 VoltageGUz嘉泰姆 (V) GUz嘉泰姆	Bias GUz嘉泰姆 VoltageGUz嘉泰姆 (V) GUz嘉泰姆	QuiescentGUz嘉泰姆 CurrentGUz嘉泰姆 (uA) GUz嘉泰姆
CXSD6273GUz嘉泰姆	SOP-14GUz嘉泰姆 QSOP-16GUz嘉泰姆 QFN4x4-16GUz嘉泰姆	VM GUz嘉泰姆	1 GUz嘉泰姆	1 GUz嘉泰姆	30GUz嘉泰姆	2.9 GUz嘉泰姆	13.2GUz嘉泰姆	0.9GUz嘉泰姆	12 GUz嘉泰姆	8000GUz嘉泰姆
CXSD6274GUz嘉泰姆	SOP-8GUz嘉泰姆	VM GUz嘉泰姆	1GUz嘉泰姆	1GUz嘉泰姆	20GUz嘉泰姆	2.9 GUz嘉泰姆	13.2 GUz嘉泰姆	0.8GUz嘉泰姆	12GUz嘉泰姆	5000GUz嘉泰姆
CXSD6274CGUz嘉泰姆	SOP-8GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	1GUz嘉泰姆	20GUz嘉泰姆	2.9GUz嘉泰姆	13.2GUz嘉泰姆	0.8GUz嘉泰姆	12GUz嘉泰姆	5000GUz嘉泰姆
CXSD6275GUz嘉泰姆	QFN4x4-24GUz嘉泰姆	VMGUz嘉泰姆	2GUz嘉泰姆	1GUz嘉泰姆	60GUz嘉泰姆	3.1GUz嘉泰姆	13.2GUz嘉泰姆	0.6GUz嘉泰姆	12GUz嘉泰姆	5000GUz嘉泰姆
CXSD6276GUz嘉泰姆	SOP-8GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	1GUz嘉泰姆	20GUz嘉泰姆	2.2GUz嘉泰姆	13.2GUz嘉泰姆	0.8GUz嘉泰姆	5~12GUz嘉泰姆	2100GUz嘉泰姆
CXSD6276AGUz嘉泰姆	SOP-8GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	1GUz嘉泰姆	20GUz嘉泰姆	2.2GUz嘉泰姆	13.2GUz嘉泰姆	0.8GUz嘉泰姆	5~12GUz嘉泰姆	2100GUz嘉泰姆
CXSD6277/A/BGUz嘉泰姆	SOP8\|TSSOP8GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	1GUz嘉泰姆	5GUz嘉泰姆	5GUz嘉泰姆	13.2GUz嘉泰姆	1.25\|0.8GUz嘉泰姆	5~12GUz嘉泰姆	3000GUz嘉泰姆
CXSD6278GUz嘉泰姆	SOP-8GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	1GUz嘉泰姆	10GUz嘉泰姆	3.3GUz嘉泰姆	5.5GUz嘉泰姆	0.8GUz嘉泰姆	5GUz嘉泰姆	2100GUz嘉泰姆
CXSD6279BGUz嘉泰姆	SOP-14GUz嘉泰姆	VM GUz嘉泰姆	1GUz嘉泰姆	1GUz嘉泰姆	10GUz嘉泰姆	5GUz嘉泰姆	13.2GUz嘉泰姆	0.8GUz嘉泰姆	12GUz嘉泰姆	2000GUz嘉泰姆
CXSD6280GUz嘉泰姆	TSSOP-24GUz嘉泰姆 \|QFN5x5-32GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	2GUz嘉泰姆	20GUz嘉泰姆	5GUz嘉泰姆	13.2GUz嘉泰姆	0.6GUz嘉泰姆	5~12GUz嘉泰姆	4000GUz嘉泰姆
CXSD6281NGUz嘉泰姆	SOP14GUz嘉泰姆 QSOP16GUz嘉泰姆 QFN-16GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	1GUz嘉泰姆	30GUz嘉泰姆	2.9GUz嘉泰姆	13.2GUz嘉泰姆	0.9GUz嘉泰姆	12GUz嘉泰姆	4000GUz嘉泰姆
CXSD6282GUz嘉泰姆	SOP-14GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	1GUz嘉泰姆	30GUz嘉泰姆	2.2GUz嘉泰姆	13.2GUz嘉泰姆	0.6GUz嘉泰姆	12GUz嘉泰姆	5000GUz嘉泰姆
CXSD6282AGUz嘉泰姆	SOP-14GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	1GUz嘉泰姆	30GUz嘉泰姆	2.2GUz嘉泰姆	13.2GUz嘉泰姆	0.6GUz嘉泰姆	12GUz嘉泰姆	5000GUz嘉泰姆
CXSD6283GUz嘉泰姆	SOP-14GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	1GUz嘉泰姆	25GUz嘉泰姆	2.2GUz嘉泰姆	13.2GUz嘉泰姆	0.8GUz嘉泰姆	12GUz嘉泰姆	5000GUz嘉泰姆
CXSD6284/AGUz嘉泰姆	LQFP7x7 48GUz嘉泰姆 TQFN7x7-48GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	6GUz嘉泰姆	0.015GUz嘉泰姆	1.4GUz嘉泰姆	6.5GUz嘉泰姆	-GUz嘉泰姆	5GUz嘉泰姆	1800GUz嘉泰姆
CXSD6285GUz嘉泰姆	TSSOP-24PGUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	2GUz嘉泰姆	20GUz嘉泰姆	2.97GUz嘉泰姆	5.5GUz嘉泰姆	0.8GUz嘉泰姆	5~12GUz嘉泰姆	5000GUz嘉泰姆
CXSD6286GUz嘉泰姆	SOP-14GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	1GUz嘉泰姆	10GUz嘉泰姆	5GUz嘉泰姆	13.2GUz嘉泰姆	0.8GUz嘉泰姆	12GUz嘉泰姆	3000GUz嘉泰姆
CXSD6287GUz嘉泰姆	SOP-8-P\|DIP-8GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	1GUz嘉泰姆	30GUz嘉泰姆	2.9GUz嘉泰姆	13.2GUz嘉泰姆	1.2GUz嘉泰姆	12GUz嘉泰姆	3000GUz嘉泰姆
CXSD6288GUz嘉泰姆	SSOP28GUz嘉泰姆 QFN4x4-24GUz嘉泰姆	VMGUz嘉泰姆	1GUz嘉泰姆	2GUz嘉泰姆	20GUz嘉泰姆	5GUz嘉泰姆	24GUz嘉泰姆	0.9GUz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

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