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：171

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WUo嘉泰姆

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

一,产品概述(General Description) WUo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 controllerWUo嘉泰姆
IC and reduces the number of external parts for a cost and space saving power management solution.WUo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 lineWUo嘉泰姆
voltage positioning (DROOP), channel-current balance,and over-current protection are accomplished through continuous inductor DCR current sensing.WUo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 dualWUo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 theWUo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-startWUo嘉泰姆
to prevent wrong operation and limit the input surge current during power-on or start-up.WUo嘉泰姆
The CXSD6275 is available in a QFN4x4-24A packageWUo嘉泰姆
二.产品特点(Features)WUo嘉泰姆

1.）Voltage-Mode Operation with Current SharingWUo嘉泰姆
Adjustable Feedback CompensationWUo嘉泰姆
Fast Load Transient ResponseWUo嘉泰姆
2.）Operate with 8V~13.2VCC Supply VoltageWUo嘉泰姆
3.）Selectable External or Internal 0.6V ReferenceWUo嘉泰姆
±1.5% Accuracy Over TemperatureWUo嘉泰姆
4.）Support Single- and Two-Phase OperationsWUo嘉泰姆
5.）5VCC and Buffered Reference OutputsWUo嘉泰姆
6.）8~12V Gate Drivers with Internal Bootstrap DiodeWUo嘉泰姆
7.）Lossless Inductor DCR Current SensingWUo嘉泰姆
8.）Selectable Operation FrequencyWUo嘉泰姆
150k/300k/400kHz per PhaseWUo嘉泰姆
9.）Power-OK Indicator OutputWUo嘉泰姆
Regulated 1.5V on REFOUT/POKWUo嘉泰姆
10.）Adjustable Over-Current Protection (OCP)WUo嘉泰姆
11.）Accurate Load Line (DROOP) ProgrammingWUo嘉泰姆
12.）Adjustable Soft-StartWUo嘉泰姆
13.）Over-Voltage Protection (OVP)WUo嘉泰姆
14.）Under-Voltage Protection (UVP)WUo嘉泰姆
15.）Over-Temperature Protection (OTP)WUo嘉泰姆
16.）QFN4x4 24-Lead Package (QFN4x4-24A)WUo嘉泰姆
17.）Lead Free and Green Devices Available (RoHS Compliant)WUo嘉泰姆
三,应用范围 (Applications)WUo嘉泰姆

Graphics Card GPU Core Power SupplyWUo嘉泰姆

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

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

QQ截图20160419174301.jpg WUo嘉泰姆

五,产品封装图 (Package)WUo嘉泰姆
WUo嘉泰姆
FUNCTIONWUo嘉泰姆

PINWUo嘉泰姆		FUNCTIONWUo嘉泰姆
NO.WUo嘉泰姆	NAMEWUo嘉泰姆	FUNCTIONWUo嘉泰姆
1WUo嘉泰姆	UGATE1WUo嘉泰姆	High-side Gate Driver Output for channel 1. Connect this pin to the gate of high-side MOSFET.WUo嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine whenWUo嘉泰姆 the high-side MOSFET has turned off.WUo嘉泰姆
2WUo嘉泰姆	BOOT1WUo嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 1. Connect the BootstrapWUo嘉泰姆 capacitor between the BOOT1 pin and the PHASE1 pin to form a bootstrap circuit. The WUo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.WUo嘉泰姆
3WUo嘉泰姆	5VCCWUo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.WUo嘉泰姆
4WUo嘉泰姆	AGNDWUo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.WUo嘉泰姆
5WUo嘉泰姆	MODEWUo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.WUo嘉泰姆
6WUo嘉泰姆	CSP1WUo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.WUo嘉泰姆
7WUo嘉泰姆	CSN1WUo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.WUo嘉泰姆
8WUo嘉泰姆	CSN2WUo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.WUo嘉泰姆
9WUo嘉泰姆	CSP2WUo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.WUo嘉泰姆

WUo嘉泰姆

PINWUo嘉泰姆		FUNCTIONWUo嘉泰姆
NO.WUo嘉泰姆	NAMEWUo嘉泰姆
10WUo嘉泰姆	DROOPWUo嘉泰姆	Load Line (droop) Setting. Connect a resistor between this pin and AGND to set the droop. AWUo嘉泰姆 sourcing current, proportional to output current is present on the DROOP pin. The droop scaleWUo嘉泰姆 factor is set by the resistors (connected with CSP1, CSP2, and DROOP), resistance of the outputWUo嘉泰姆 inductors, and the internal voltage divider with the ratio of 5%.WUo嘉泰姆
11WUo嘉泰姆	RTWUo嘉泰姆	Operating Frequency Setting. The three-level input pin sets the operating frequency for eachWUo嘉泰姆 channel.WUo嘉泰姆
		RTWUo嘉泰姆	Operating Frequency (kHz)WUo嘉泰姆
		GNDWUo嘉泰姆	150WUo嘉泰姆
		FloatingWUo嘉泰姆	300WUo嘉泰姆
		5VCCWUo嘉泰姆	400WUo嘉泰姆
12WUo嘉泰姆	COMPWUo嘉泰姆	Error Amplifier Output. Connect the compensation network between COMP, FB, and VOUT for TypeWUo嘉泰姆 2 or Type 3 feedback compensation.WUo嘉泰姆
13WUo嘉泰姆	FBWUo嘉泰姆	Feedback Voltage. This pin is the inverting input to the error comparator. A resistor divider fromWUo嘉泰姆 the output to the AGND is used to set the regulation voltage.WUo嘉泰姆
14WUo嘉泰姆	SSWUo嘉泰姆	Soft-start Current Output. Connect a capacitor from this pin to the AGND to set the soft-startWUo嘉泰姆 interval. Pulling the voltage on this pin below 0.5V causes COMP to pull low and then shuts off theWUo嘉泰姆 output.WUo嘉泰姆
15WUo嘉泰姆	REFIN/ENWUo嘉泰姆	External Reference and Enable Input. The IC uses the voltage (VREFIN/EN) as reference voltage ofWUo嘉泰姆 the converter with soft-start control. If this pin is driven by an external voltage ranged from 0.4V toWUo嘉泰姆 2V. The IC is disabled if the voltage is below 0.4V (typical). If external reference is not available,WUo嘉泰姆 then connect this pin to 5VCC for internal 0.6V reference.WUo嘉泰姆
16WUo嘉泰姆	REFOUT/POWUo嘉泰姆 KWUo嘉泰姆	Power-OK and 1.5V Reference Output. This pin is a reference output used to indicate the statusWUo嘉泰姆 of the voltages on SS pin and FB pin. REFOUT/POK provides 1.5V reference if VFB> 87.5% ofWUo嘉泰姆 reference (VR).WUo嘉泰姆
17WUo嘉泰姆	BOOT2WUo嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 2. Connect the BootstrapWUo嘉泰姆 capacitor between the BOOT2 pin and the PHASE2 pin to form a bootstrap circuit. The bootstrapWUo嘉泰姆 capacitor provides the charge to turn on the high-side MOSFET. Typical values for CBOOT rangeWUo嘉泰姆 from 0.1μF to 1μF. Ensure that CBOOT is placed near the IC.WUo嘉泰姆
18WUo嘉泰姆	UGATE2WUo嘉泰姆	High-side Gate Driver Output for Channel 2. Connect this pin to the gate of high-side MOSFET.WUo嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when theWUo嘉泰姆 high-side MOSFET has turned off.WUo嘉泰姆
19WUo嘉泰姆	PHASE2WUo嘉泰姆	Switch Node for Channel 2. Connect this pin to the source of high-side MOSFET and the drain ofWUo嘉泰姆 the low-side MOSFET. This pin is used as sink for UGATE2 driver. This pin is also monitored byWUo嘉泰姆 the adaptive shoot-through protection circuitry to determine when the high-side MOSFET hasWUo嘉泰姆 turned off. An Schottky diode between this pin and the ground is recommended to reduceWUo嘉泰姆 negative transient voltage that is common in a power supply system.WUo嘉泰姆
20WUo嘉泰姆	LGATE2WUo嘉泰姆	Low-side Gate Driver Output for Channel 2. Connect this pin to the gate of low-side MOSFET.WUo嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when theWUo嘉泰姆 low-side MOSFET has turned off.WUo嘉泰姆
21WUo嘉泰姆	VCCDRVWUo嘉泰姆	Drive for External Linear Regulator. This pin is the drive output for the external linear regulator.WUo嘉泰姆 Connect this pin to base/gate of NPN/NMOS transistor as the pass element.WUo嘉泰姆
22WUo嘉泰姆	VCCWUo嘉泰姆	Supply Voltage. This pin along with VCCDRV pin and external pass element provides 8.5VWUo嘉泰姆 regulated bias supply, low-side gate drivers, and the bootstrap circuit for high-side drivers. This pinWUo嘉泰姆 can receive a well-decoupled 8V~13.2V supply voltage alone if the VCCDRV is left open. EnsureWUo嘉泰姆 that this pin is bypassed by a ceramic capacitor next to the pin.WUo嘉泰姆
23WUo嘉泰姆	LGATE1WUo嘉泰姆	Low-side Gate Driver Output for Channel 1. Connect this pin to the gate of low-side MOSFET.WUo嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when theWUo嘉泰姆 low-side MOSFET has turned off.WUo嘉泰姆

PINWUo嘉泰姆		FUNCTIONWUo嘉泰姆
NO.WUo嘉泰姆	NAMEWUo嘉泰姆	FUNCTIONWUo嘉泰姆
24WUo嘉泰姆	PHASE1WUo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.WUo嘉泰姆
25WUo嘉泰姆	PGNDWUo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.WUo嘉泰姆

六.电路原理图WUo嘉泰姆

WUo嘉泰姆

八,相关产品 更多同类产品...... WUo嘉泰姆

Switching Regulator > Buck ControllerWUo嘉泰姆
Part_No WUo嘉泰姆	Package WUo嘉泰姆	ArchiWUo嘉泰姆 tectuWUo嘉泰姆	PhaseWUo嘉泰姆	No.ofWUo嘉泰姆 PWMWUo嘉泰姆 OutputWUo嘉泰姆	Output WUo嘉泰姆 CurrentWUo嘉泰姆 (A) WUo嘉泰姆	InputWUo嘉泰姆 Voltage (V) WUo嘉泰姆		ReferenceWUo嘉泰姆 VoltageWUo嘉泰姆 (V) WUo嘉泰姆	Bias WUo嘉泰姆 VoltageWUo嘉泰姆 (V) WUo嘉泰姆	QuiescentWUo嘉泰姆 CurrentWUo嘉泰姆 (uA) WUo嘉泰姆
Part_No WUo嘉泰姆	Package WUo嘉泰姆	ArchiWUo嘉泰姆 tectuWUo嘉泰姆	PhaseWUo嘉泰姆	No.ofWUo嘉泰姆 PWMWUo嘉泰姆 OutputWUo嘉泰姆	Output WUo嘉泰姆 CurrentWUo嘉泰姆 (A) WUo嘉泰姆	minWUo嘉泰姆	maxWUo嘉泰姆	ReferenceWUo嘉泰姆 VoltageWUo嘉泰姆 (V) WUo嘉泰姆	Bias WUo嘉泰姆 VoltageWUo嘉泰姆 (V) WUo嘉泰姆	QuiescentWUo嘉泰姆 CurrentWUo嘉泰姆 (uA) WUo嘉泰姆
CXSD6273WUo嘉泰姆	SOP-14WUo嘉泰姆 QSOP-16WUo嘉泰姆 QFN4x4-16WUo嘉泰姆	VM WUo嘉泰姆	1 WUo嘉泰姆	1 WUo嘉泰姆	30WUo嘉泰姆	2.9 WUo嘉泰姆	13.2WUo嘉泰姆	0.9WUo嘉泰姆	12 WUo嘉泰姆	8000WUo嘉泰姆
CXSD6274WUo嘉泰姆	SOP-8WUo嘉泰姆	VM WUo嘉泰姆	1WUo嘉泰姆	1WUo嘉泰姆	20WUo嘉泰姆	2.9 WUo嘉泰姆	13.2 WUo嘉泰姆	0.8WUo嘉泰姆	12WUo嘉泰姆	5000WUo嘉泰姆
CXSD6274CWUo嘉泰姆	SOP-8WUo嘉泰姆	VMWUo嘉泰姆	1WUo嘉泰姆	1WUo嘉泰姆	20WUo嘉泰姆	2.9WUo嘉泰姆	13.2WUo嘉泰姆	0.8WUo嘉泰姆	12WUo嘉泰姆	5000WUo嘉泰姆
CXSD6275WUo嘉泰姆	QFN4x4-24WUo嘉泰姆	VMWUo嘉泰姆	2WUo嘉泰姆	1WUo嘉泰姆	60WUo嘉泰姆	3.1WUo嘉泰姆	13.2WUo嘉泰姆	0.6WUo嘉泰姆	12WUo嘉泰姆	5000WUo嘉泰姆
CXSD6276WUo嘉泰姆	SOP-8WUo嘉泰姆	VMWUo嘉泰姆	1WUo嘉泰姆	1WUo嘉泰姆	20WUo嘉泰姆	2.2WUo嘉泰姆	13.2WUo嘉泰姆	0.8WUo嘉泰姆	5~12WUo嘉泰姆	2100WUo嘉泰姆
CXSD6276AWUo嘉泰姆	SOP-8WUo嘉泰姆	VMWUo嘉泰姆	1WUo嘉泰姆	1WUo嘉泰姆	20WUo嘉泰姆	2.2WUo嘉泰姆	13.2WUo嘉泰姆	0.8WUo嘉泰姆	5~12WUo嘉泰姆	2100WUo嘉泰姆
CXSD6277/A/BWUo嘉泰姆	SOP8\|TSSOP8WUo嘉泰姆	VMWUo嘉泰姆	1WUo嘉泰姆	1WUo嘉泰姆	5WUo嘉泰姆	5WUo嘉泰姆	13.2WUo嘉泰姆	1.25\|0.8WUo嘉泰姆	5~12WUo嘉泰姆	3000WUo嘉泰姆
CXSD6278WUo嘉泰姆	SOP-8WUo嘉泰姆	VMWUo嘉泰姆	1WUo嘉泰姆	1WUo嘉泰姆	10WUo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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