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

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发表时间：2020-04-21浏览次数：233

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

目录Tfj嘉泰姆

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

一,产品概述(General Description) Tfj嘉泰姆

The CXSD6275, two-phase PWM control IC, provides a precision voltage regulation system for advanced graphic microprocessors in graphics card applications. The integration of power MOSFET drivers into the controllerTfj嘉泰姆
IC and reduces the number of external parts for a cost and space saving power management solution.Tfj嘉泰姆
The CXSD6275 uses a voltage-mode PWM architecture,operating with fixed-frequency, to provides excellent load transient response. The device uses the voltage across the DCRs of the inductors for current sensing. Load lineTfj嘉泰姆
voltage positioning (DROOP), channel-current balance,and over-current protection are accomplished through continuous inductor DCR current sensing.Tfj嘉泰姆
The MODE pin programs single- or two- phase operation.When IC operates in two-phase mode normally, it can transfer two-phase mode to single-phase mode at liberty.Nevertheless, once operates in single-phase mode, the operation mode is latched. It is required to toggle SS,REFIN/EN or 5VCC pin to reset the IC. Such feature of the MODE pin makes the CXSD6275 ideally suitable for dualTfj嘉泰姆
power input applications, such as PCIE interfaced graphic cards.This control IC‘s protection features include a set of sophisticated over-temperature, over-voltage, under-voltage, and over-current protections. Over-voltage re-sults in the converter turning the lower MOSFETs on to clamp the rising output voltage and protects theTfj嘉泰姆
microprocessor. The over-current protection level is set through external resistors. The device also provides a power-on-reset function and a programmable soft-startTfj嘉泰姆
to prevent wrong operation and limit the input surge current during power-on or start-up.Tfj嘉泰姆
The CXSD6275 is available in a QFN4x4-24A packageTfj嘉泰姆
二.产品特点(Features)Tfj嘉泰姆

1.）Voltage-Mode Operation with Current SharingTfj嘉泰姆
Adjustable Feedback CompensationTfj嘉泰姆
Fast Load Transient ResponseTfj嘉泰姆
2.）Operate with 8V~13.2VCC Supply VoltageTfj嘉泰姆
3.）Selectable External or Internal 0.6V ReferenceTfj嘉泰姆
±1.5% Accuracy Over TemperatureTfj嘉泰姆
4.）Support Single- and Two-Phase OperationsTfj嘉泰姆
5.）5VCC and Buffered Reference OutputsTfj嘉泰姆
6.）8~12V Gate Drivers with Internal Bootstrap DiodeTfj嘉泰姆
7.）Lossless Inductor DCR Current SensingTfj嘉泰姆
8.）Selectable Operation FrequencyTfj嘉泰姆
150k/300k/400kHz per PhaseTfj嘉泰姆
9.）Power-OK Indicator OutputTfj嘉泰姆
Regulated 1.5V on REFOUT/POKTfj嘉泰姆
10.）Adjustable Over-Current Protection (OCP)Tfj嘉泰姆
11.）Accurate Load Line (DROOP) ProgrammingTfj嘉泰姆
12.）Adjustable Soft-StartTfj嘉泰姆
13.）Over-Voltage Protection (OVP)Tfj嘉泰姆
14.）Under-Voltage Protection (UVP)Tfj嘉泰姆
15.）Over-Temperature Protection (OTP)Tfj嘉泰姆
16.）QFN4x4 24-Lead Package (QFN4x4-24A)Tfj嘉泰姆
17.）Lead Free and Green Devices Available (RoHS Compliant)Tfj嘉泰姆
三,应用范围 (Applications)Tfj嘉泰姆

Graphics Card GPU Core Power SupplyTfj嘉泰姆

Motherboard Chipset or DDR SDRAM Core PowerSupplyTfj嘉泰姆
On-board High Power PWM Converter with Out-Tfj嘉泰姆

put Current up to 60ATfj嘉泰姆
四.下载产品资料PDF文档 Tfj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！Tfj嘉泰姆

QQ截图20160419174301.jpg Tfj嘉泰姆

五,产品封装图 (Package)Tfj嘉泰姆
Tfj嘉泰姆
FUNCTIONTfj嘉泰姆

PINTfj嘉泰姆		FUNCTIONTfj嘉泰姆
NO.Tfj嘉泰姆	NAMETfj嘉泰姆	FUNCTIONTfj嘉泰姆
1Tfj嘉泰姆	UGATE1Tfj嘉泰姆	High-side Gate Driver Output for channel 1. Connect this pin to the gate of high-side MOSFET.Tfj嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine whenTfj嘉泰姆 the high-side MOSFET has turned off.Tfj嘉泰姆
2Tfj嘉泰姆	BOOT1Tfj嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 1. Connect the BootstrapTfj嘉泰姆 capacitor between the BOOT1 pin and the PHASE1 pin to form a bootstrap circuit. The Tfj嘉泰姆 bootstrap capacitor provides the charge to turn on the high-side MOSFET. Typical values for CBOOT ranged from 0.1μF to 1μF. Ensure that CBOOT is placed near the IC.Tfj嘉泰姆
3Tfj嘉泰姆	5VCCTfj嘉泰姆	Internal Regulator Output. This is the output pin of the linear regulator, which is converting power from VCC and provides output current up to 20mA minimums for internal bias and external usage.Tfj嘉泰姆
4Tfj嘉泰姆	AGNDTfj嘉泰姆	Signal Ground for the IC. All voltage levels are measured with respect to this pin. Tie this pin to the ground island/plane through the lowest impedance connection available.Tfj嘉泰姆
5Tfj嘉泰姆	MODETfj嘉泰姆	Operation Phase Selection Input. Pulling this pin lower than 0.64V sets two-phase operation with both channels enabled. Pulling this pin higher than 0.8V sets single-phase operation with the channel 2 disabled. Once operating in single-phase mode, the operation mode is latched. It is required to toggle SS, REFIN/EN, or 5VCC pin to reset the IC.Tfj嘉泰姆
6Tfj嘉泰姆	CSP1Tfj嘉泰姆	Positive Input of current sensing Amplifier for channel 1. This pin combined with CSN1 senses the inductor current through an RC network.Tfj嘉泰姆
7Tfj嘉泰姆	CSN1Tfj嘉泰姆	Negative Input of current sensing amplifier for channel 1. This pin combined with CSP1 senses the inductor current through an RC network.Tfj嘉泰姆
8Tfj嘉泰姆	CSN2Tfj嘉泰姆	Negative Input of current sensing amplifier for channel 2. This pin combined with CSP2 senses the inductor current through an RC network.Tfj嘉泰姆
9Tfj嘉泰姆	CSP2Tfj嘉泰姆	Positive Input of current sensing Amplifier for Channel 2. This pin combined with CSN2 senses the inductor current through an RC network.Tfj嘉泰姆

Tfj嘉泰姆

PINTfj嘉泰姆		FUNCTIONTfj嘉泰姆
NO.Tfj嘉泰姆	NAMETfj嘉泰姆
10Tfj嘉泰姆	DROOPTfj嘉泰姆	Load Line (droop) Setting. Connect a resistor between this pin and AGND to set the droop. ATfj嘉泰姆 sourcing current, proportional to output current is present on the DROOP pin. The droop scaleTfj嘉泰姆 factor is set by the resistors (connected with CSP1, CSP2, and DROOP), resistance of the outputTfj嘉泰姆 inductors, and the internal voltage divider with the ratio of 5%.Tfj嘉泰姆
11Tfj嘉泰姆	RTTfj嘉泰姆	Operating Frequency Setting. The three-level input pin sets the operating frequency for eachTfj嘉泰姆 channel.Tfj嘉泰姆
		RTTfj嘉泰姆	Operating Frequency (kHz)Tfj嘉泰姆
		GNDTfj嘉泰姆	150Tfj嘉泰姆
		FloatingTfj嘉泰姆	300Tfj嘉泰姆
		5VCCTfj嘉泰姆	400Tfj嘉泰姆
12Tfj嘉泰姆	COMPTfj嘉泰姆	Error Amplifier Output. Connect the compensation network between COMP, FB, and VOUT for TypeTfj嘉泰姆 2 or Type 3 feedback compensation.Tfj嘉泰姆
13Tfj嘉泰姆	FBTfj嘉泰姆	Feedback Voltage. This pin is the inverting input to the error comparator. A resistor divider fromTfj嘉泰姆 the output to the AGND is used to set the regulation voltage.Tfj嘉泰姆
14Tfj嘉泰姆	SSTfj嘉泰姆	Soft-start Current Output. Connect a capacitor from this pin to the AGND to set the soft-startTfj嘉泰姆 interval. Pulling the voltage on this pin below 0.5V causes COMP to pull low and then shuts off theTfj嘉泰姆 output.Tfj嘉泰姆
15Tfj嘉泰姆	REFIN/ENTfj嘉泰姆	External Reference and Enable Input. The IC uses the voltage (VREFIN/EN) as reference voltage ofTfj嘉泰姆 the converter with soft-start control. If this pin is driven by an external voltage ranged from 0.4V toTfj嘉泰姆 2V. The IC is disabled if the voltage is below 0.4V (typical). If external reference is not available,Tfj嘉泰姆 then connect this pin to 5VCC for internal 0.6V reference.Tfj嘉泰姆
16Tfj嘉泰姆	REFOUT/POTfj嘉泰姆 KTfj嘉泰姆	Power-OK and 1.5V Reference Output. This pin is a reference output used to indicate the statusTfj嘉泰姆 of the voltages on SS pin and FB pin. REFOUT/POK provides 1.5V reference if VFB> 87.5% ofTfj嘉泰姆 reference (VR).Tfj嘉泰姆
17Tfj嘉泰姆	BOOT2Tfj嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 2. Connect the BootstrapTfj嘉泰姆 capacitor between the BOOT2 pin and the PHASE2 pin to form a bootstrap circuit. The bootstrapTfj嘉泰姆 capacitor provides the charge to turn on the high-side MOSFET. Typical values for CBOOT rangeTfj嘉泰姆 from 0.1μF to 1μF. Ensure that CBOOT is placed near the IC.Tfj嘉泰姆
18Tfj嘉泰姆	UGATE2Tfj嘉泰姆	High-side Gate Driver Output for Channel 2. Connect this pin to the gate of high-side MOSFET.Tfj嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when theTfj嘉泰姆 high-side MOSFET has turned off.Tfj嘉泰姆
19Tfj嘉泰姆	PHASE2Tfj嘉泰姆	Switch Node for Channel 2. Connect this pin to the source of high-side MOSFET and the drain ofTfj嘉泰姆 the low-side MOSFET. This pin is used as sink for UGATE2 driver. This pin is also monitored byTfj嘉泰姆 the adaptive shoot-through protection circuitry to determine when the high-side MOSFET hasTfj嘉泰姆 turned off. An Schottky diode between this pin and the ground is recommended to reduceTfj嘉泰姆 negative transient voltage that is common in a power supply system.Tfj嘉泰姆
20Tfj嘉泰姆	LGATE2Tfj嘉泰姆	Low-side Gate Driver Output for Channel 2. Connect this pin to the gate of low-side MOSFET.Tfj嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when theTfj嘉泰姆 low-side MOSFET has turned off.Tfj嘉泰姆
21Tfj嘉泰姆	VCCDRVTfj嘉泰姆	Drive for External Linear Regulator. This pin is the drive output for the external linear regulator.Tfj嘉泰姆 Connect this pin to base/gate of NPN/NMOS transistor as the pass element.Tfj嘉泰姆
22Tfj嘉泰姆	VCCTfj嘉泰姆	Supply Voltage. This pin along with VCCDRV pin and external pass element provides 8.5VTfj嘉泰姆 regulated bias supply, low-side gate drivers, and the bootstrap circuit for high-side drivers. This pinTfj嘉泰姆 can receive a well-decoupled 8V~13.2V supply voltage alone if the VCCDRV is left open. EnsureTfj嘉泰姆 that this pin is bypassed by a ceramic capacitor next to the pin.Tfj嘉泰姆
23Tfj嘉泰姆	LGATE1Tfj嘉泰姆	Low-side Gate Driver Output for Channel 1. Connect this pin to the gate of low-side MOSFET.Tfj嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when theTfj嘉泰姆 low-side MOSFET has turned off.Tfj嘉泰姆

PINTfj嘉泰姆		FUNCTIONTfj嘉泰姆
NO.Tfj嘉泰姆	NAMETfj嘉泰姆	FUNCTIONTfj嘉泰姆
24Tfj嘉泰姆	PHASE1Tfj嘉泰姆	Switch Node for Channel 1. Connect this pin to the source of high-side MOSFET and the drain of the low-side MOSFET. This pin is used as sink for UGATT1 driver. This pin is also monitored by the adaptive shoot-through protection circuitry to determine when the high-side MOSFET has turned off. An Schottky diode between this pin and the ground is recommended to reduce negative transient voltage, which is common in a power supply system.Tfj嘉泰姆
25Tfj嘉泰姆	PGNDTfj嘉泰姆	Power Ground for the low-side gate drivers. Connect this pin to the source of low-side MOSFETs. This pin is used as sink for LGATE1 and LGATE2 drivers.Tfj嘉泰姆

六.电路原理图Tfj嘉泰姆

Tfj嘉泰姆

八,相关产品 更多同类产品...... Tfj嘉泰姆

Switching Regulator > Buck ControllerTfj嘉泰姆
Part_No Tfj嘉泰姆	Package Tfj嘉泰姆	ArchiTfj嘉泰姆 tectuTfj嘉泰姆	PhaseTfj嘉泰姆	No.ofTfj嘉泰姆 PWMTfj嘉泰姆 OutputTfj嘉泰姆	Output Tfj嘉泰姆 CurrentTfj嘉泰姆 (A) Tfj嘉泰姆	InputTfj嘉泰姆 Voltage (V) Tfj嘉泰姆		ReferenceTfj嘉泰姆 VoltageTfj嘉泰姆 (V) Tfj嘉泰姆	Bias Tfj嘉泰姆 VoltageTfj嘉泰姆 (V) Tfj嘉泰姆	QuiescentTfj嘉泰姆 CurrentTfj嘉泰姆 (uA) Tfj嘉泰姆
Part_No Tfj嘉泰姆	Package Tfj嘉泰姆	ArchiTfj嘉泰姆 tectuTfj嘉泰姆	PhaseTfj嘉泰姆	No.ofTfj嘉泰姆 PWMTfj嘉泰姆 OutputTfj嘉泰姆	Output Tfj嘉泰姆 CurrentTfj嘉泰姆 (A) Tfj嘉泰姆	minTfj嘉泰姆	maxTfj嘉泰姆	ReferenceTfj嘉泰姆 VoltageTfj嘉泰姆 (V) Tfj嘉泰姆	Bias Tfj嘉泰姆 VoltageTfj嘉泰姆 (V) Tfj嘉泰姆	QuiescentTfj嘉泰姆 CurrentTfj嘉泰姆 (uA) Tfj嘉泰姆
CXSD6273Tfj嘉泰姆	SOP-14Tfj嘉泰姆 QSOP-16Tfj嘉泰姆 QFN4x4-16Tfj嘉泰姆	VM Tfj嘉泰姆	1 Tfj嘉泰姆	1 Tfj嘉泰姆	30Tfj嘉泰姆	2.9 Tfj嘉泰姆	13.2Tfj嘉泰姆	0.9Tfj嘉泰姆	12 Tfj嘉泰姆	8000Tfj嘉泰姆
CXSD6274Tfj嘉泰姆	SOP-8Tfj嘉泰姆	VM Tfj嘉泰姆	1Tfj嘉泰姆	1Tfj嘉泰姆	20Tfj嘉泰姆	2.9 Tfj嘉泰姆	13.2 Tfj嘉泰姆	0.8Tfj嘉泰姆	12Tfj嘉泰姆	5000Tfj嘉泰姆
CXSD6274CTfj嘉泰姆	SOP-8Tfj嘉泰姆	VMTfj嘉泰姆	1Tfj嘉泰姆	1Tfj嘉泰姆	20Tfj嘉泰姆	2.9Tfj嘉泰姆	13.2Tfj嘉泰姆	0.8Tfj嘉泰姆	12Tfj嘉泰姆	5000Tfj嘉泰姆
CXSD6275Tfj嘉泰姆	QFN4x4-24Tfj嘉泰姆	VMTfj嘉泰姆	2Tfj嘉泰姆	1Tfj嘉泰姆	60Tfj嘉泰姆	3.1Tfj嘉泰姆	13.2Tfj嘉泰姆	0.6Tfj嘉泰姆	12Tfj嘉泰姆	5000Tfj嘉泰姆
CXSD6276Tfj嘉泰姆	SOP-8Tfj嘉泰姆	VMTfj嘉泰姆	1Tfj嘉泰姆	1Tfj嘉泰姆	20Tfj嘉泰姆	2.2Tfj嘉泰姆	13.2Tfj嘉泰姆	0.8Tfj嘉泰姆	5~12Tfj嘉泰姆	2100Tfj嘉泰姆
CXSD6276ATfj嘉泰姆	SOP-8Tfj嘉泰姆	VMTfj嘉泰姆	1Tfj嘉泰姆	1Tfj嘉泰姆	20Tfj嘉泰姆	2.2Tfj嘉泰姆	13.2Tfj嘉泰姆	0.8Tfj嘉泰姆	5~12Tfj嘉泰姆	2100Tfj嘉泰姆
CXSD6277/A/BTfj嘉泰姆	SOP8\|TSSOP8Tfj嘉泰姆	VMTfj嘉泰姆	1Tfj嘉泰姆	1Tfj嘉泰姆	5Tfj嘉泰姆	5Tfj嘉泰姆	13.2Tfj嘉泰姆	1.25\|0.8Tfj嘉泰姆	5~12Tfj嘉泰姆	3000Tfj嘉泰姆
CXSD6278Tfj嘉泰姆	SOP-8Tfj嘉泰姆	VMTfj嘉泰姆	1Tfj嘉泰姆	1Tfj嘉泰姆	10Tfj嘉泰姆

上一篇：CXSD6274C 固定的300kHz开关频率电压模式和同步PWM控制器来驱动双N通道mosfet

下一篇：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

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