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：188

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pjk嘉泰姆

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

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

1.）Voltage-Mode Operation with Current Sharingpjk嘉泰姆
Adjustable Feedback Compensationpjk嘉泰姆
Fast Load Transient Responsepjk嘉泰姆
2.）Operate with 8V~13.2VCC Supply Voltagepjk嘉泰姆
3.）Selectable External or Internal 0.6V Referencepjk嘉泰姆
±1.5% Accuracy Over Temperaturepjk嘉泰姆
4.）Support Single- and Two-Phase Operationspjk嘉泰姆
5.）5VCC and Buffered Reference Outputspjk嘉泰姆
6.）8~12V Gate Drivers with Internal Bootstrap Diodepjk嘉泰姆
7.）Lossless Inductor DCR Current Sensingpjk嘉泰姆
8.）Selectable Operation Frequencypjk嘉泰姆
150k/300k/400kHz per Phasepjk嘉泰姆
9.）Power-OK Indicator Outputpjk嘉泰姆
Regulated 1.5V on REFOUT/POKpjk嘉泰姆
10.）Adjustable Over-Current Protection (OCP)pjk嘉泰姆
11.）Accurate Load Line (DROOP) Programmingpjk嘉泰姆
12.）Adjustable Soft-Startpjk嘉泰姆
13.）Over-Voltage Protection (OVP)pjk嘉泰姆
14.）Under-Voltage Protection (UVP)pjk嘉泰姆
15.）Over-Temperature Protection (OTP)pjk嘉泰姆
16.）QFN4x4 24-Lead Package (QFN4x4-24A)pjk嘉泰姆
17.）Lead Free and Green Devices Available (RoHS Compliant)pjk嘉泰姆
三,应用范围 (Applications)pjk嘉泰姆

Graphics Card GPU Core Power Supplypjk嘉泰姆

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

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

QQ截图20160419174301.jpg pjk嘉泰姆

五,产品封装图 (Package)pjk嘉泰姆
pjk嘉泰姆
FUNCTIONpjk嘉泰姆

PINpjk嘉泰姆		FUNCTIONpjk嘉泰姆
NO.pjk嘉泰姆	NAMEpjk嘉泰姆	FUNCTIONpjk嘉泰姆
1pjk嘉泰姆	UGATE1pjk嘉泰姆	High-side Gate Driver Output for channel 1. Connect this pin to the gate of high-side MOSFET.pjk嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine whenpjk嘉泰姆 the high-side MOSFET has turned off.pjk嘉泰姆
2pjk嘉泰姆	BOOT1pjk嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 1. Connect the Bootstrappjk嘉泰姆 capacitor between the BOOT1 pin and the PHASE1 pin to form a bootstrap circuit. The pjk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.pjk嘉泰姆
3pjk嘉泰姆	5VCCpjk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.pjk嘉泰姆
4pjk嘉泰姆	AGNDpjk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.pjk嘉泰姆
5pjk嘉泰姆	MODEpjk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.pjk嘉泰姆
6pjk嘉泰姆	CSP1pjk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.pjk嘉泰姆
7pjk嘉泰姆	CSN1pjk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.pjk嘉泰姆
8pjk嘉泰姆	CSN2pjk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.pjk嘉泰姆
9pjk嘉泰姆	CSP2pjk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.pjk嘉泰姆

pjk嘉泰姆

PINpjk嘉泰姆		FUNCTIONpjk嘉泰姆
NO.pjk嘉泰姆	NAMEpjk嘉泰姆
10pjk嘉泰姆	DROOPpjk嘉泰姆	Load Line (droop) Setting. Connect a resistor between this pin and AGND to set the droop. Apjk嘉泰姆 sourcing current, proportional to output current is present on the DROOP pin. The droop scalepjk嘉泰姆 factor is set by the resistors (connected with CSP1, CSP2, and DROOP), resistance of the outputpjk嘉泰姆 inductors, and the internal voltage divider with the ratio of 5%.pjk嘉泰姆
11pjk嘉泰姆	RTpjk嘉泰姆	Operating Frequency Setting. The three-level input pin sets the operating frequency for eachpjk嘉泰姆 channel.pjk嘉泰姆
		RTpjk嘉泰姆	Operating Frequency (kHz)pjk嘉泰姆
		GNDpjk嘉泰姆	150pjk嘉泰姆
		Floatingpjk嘉泰姆	300pjk嘉泰姆
		5VCCpjk嘉泰姆	400pjk嘉泰姆
12pjk嘉泰姆	COMPpjk嘉泰姆	Error Amplifier Output. Connect the compensation network between COMP, FB, and VOUT for Typepjk嘉泰姆 2 or Type 3 feedback compensation.pjk嘉泰姆
13pjk嘉泰姆	FBpjk嘉泰姆	Feedback Voltage. This pin is the inverting input to the error comparator. A resistor divider frompjk嘉泰姆 the output to the AGND is used to set the regulation voltage.pjk嘉泰姆
14pjk嘉泰姆	SSpjk嘉泰姆	Soft-start Current Output. Connect a capacitor from this pin to the AGND to set the soft-startpjk嘉泰姆 interval. Pulling the voltage on this pin below 0.5V causes COMP to pull low and then shuts off thepjk嘉泰姆 output.pjk嘉泰姆
15pjk嘉泰姆	REFIN/ENpjk嘉泰姆	External Reference and Enable Input. The IC uses the voltage (VREFIN/EN) as reference voltage ofpjk嘉泰姆 the converter with soft-start control. If this pin is driven by an external voltage ranged from 0.4V topjk嘉泰姆 2V. The IC is disabled if the voltage is below 0.4V (typical). If external reference is not available,pjk嘉泰姆 then connect this pin to 5VCC for internal 0.6V reference.pjk嘉泰姆
16pjk嘉泰姆	REFOUT/POpjk嘉泰姆 Kpjk嘉泰姆	Power-OK and 1.5V Reference Output. This pin is a reference output used to indicate the statuspjk嘉泰姆 of the voltages on SS pin and FB pin. REFOUT/POK provides 1.5V reference if VFB> 87.5% ofpjk嘉泰姆 reference (VR).pjk嘉泰姆
17pjk嘉泰姆	BOOT2pjk嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 2. Connect the Bootstrappjk嘉泰姆 capacitor between the BOOT2 pin and the PHASE2 pin to form a bootstrap circuit. The bootstrappjk嘉泰姆 capacitor provides the charge to turn on the high-side MOSFET. Typical values for CBOOT rangepjk嘉泰姆 from 0.1μF to 1μF. Ensure that CBOOT is placed near the IC.pjk嘉泰姆
18pjk嘉泰姆	UGATE2pjk嘉泰姆	High-side Gate Driver Output for Channel 2. Connect this pin to the gate of high-side MOSFET.pjk嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when thepjk嘉泰姆 high-side MOSFET has turned off.pjk嘉泰姆
19pjk嘉泰姆	PHASE2pjk嘉泰姆	Switch Node for Channel 2. Connect this pin to the source of high-side MOSFET and the drain ofpjk嘉泰姆 the low-side MOSFET. This pin is used as sink for UGATE2 driver. This pin is also monitored bypjk嘉泰姆 the adaptive shoot-through protection circuitry to determine when the high-side MOSFET haspjk嘉泰姆 turned off. An Schottky diode between this pin and the ground is recommended to reducepjk嘉泰姆 negative transient voltage that is common in a power supply system.pjk嘉泰姆
20pjk嘉泰姆	LGATE2pjk嘉泰姆	Low-side Gate Driver Output for Channel 2. Connect this pin to the gate of low-side MOSFET.pjk嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when thepjk嘉泰姆 low-side MOSFET has turned off.pjk嘉泰姆
21pjk嘉泰姆	VCCDRVpjk嘉泰姆	Drive for External Linear Regulator. This pin is the drive output for the external linear regulator.pjk嘉泰姆 Connect this pin to base/gate of NPN/NMOS transistor as the pass element.pjk嘉泰姆
22pjk嘉泰姆	VCCpjk嘉泰姆	Supply Voltage. This pin along with VCCDRV pin and external pass element provides 8.5Vpjk嘉泰姆 regulated bias supply, low-side gate drivers, and the bootstrap circuit for high-side drivers. This pinpjk嘉泰姆 can receive a well-decoupled 8V~13.2V supply voltage alone if the VCCDRV is left open. Ensurepjk嘉泰姆 that this pin is bypassed by a ceramic capacitor next to the pin.pjk嘉泰姆
23pjk嘉泰姆	LGATE1pjk嘉泰姆	Low-side Gate Driver Output for Channel 1. Connect this pin to the gate of low-side MOSFET.pjk嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when thepjk嘉泰姆 low-side MOSFET has turned off.pjk嘉泰姆

PINpjk嘉泰姆		FUNCTIONpjk嘉泰姆
NO.pjk嘉泰姆	NAMEpjk嘉泰姆	FUNCTIONpjk嘉泰姆
24pjk嘉泰姆	PHASE1pjk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.pjk嘉泰姆
25pjk嘉泰姆	PGNDpjk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.pjk嘉泰姆

六.电路原理图pjk嘉泰姆

pjk嘉泰姆

八,相关产品 更多同类产品...... pjk嘉泰姆

Switching Regulator > Buck Controllerpjk嘉泰姆
Part_No pjk嘉泰姆	Package pjk嘉泰姆	Archipjk嘉泰姆 tectupjk嘉泰姆	Phasepjk嘉泰姆	No.ofpjk嘉泰姆 PWMpjk嘉泰姆 Outputpjk嘉泰姆	Output pjk嘉泰姆 Currentpjk嘉泰姆 (A) pjk嘉泰姆	Inputpjk嘉泰姆 Voltage (V) pjk嘉泰姆		Referencepjk嘉泰姆 Voltagepjk嘉泰姆 (V) pjk嘉泰姆	Bias pjk嘉泰姆 Voltagepjk嘉泰姆 (V) pjk嘉泰姆	Quiescentpjk嘉泰姆 Currentpjk嘉泰姆 (uA) pjk嘉泰姆
Part_No pjk嘉泰姆	Package pjk嘉泰姆	Archipjk嘉泰姆 tectupjk嘉泰姆	Phasepjk嘉泰姆	No.ofpjk嘉泰姆 PWMpjk嘉泰姆 Outputpjk嘉泰姆	Output pjk嘉泰姆 Currentpjk嘉泰姆 (A) pjk嘉泰姆	minpjk嘉泰姆	maxpjk嘉泰姆	Referencepjk嘉泰姆 Voltagepjk嘉泰姆 (V) pjk嘉泰姆	Bias pjk嘉泰姆 Voltagepjk嘉泰姆 (V) pjk嘉泰姆	Quiescentpjk嘉泰姆 Currentpjk嘉泰姆 (uA) pjk嘉泰姆
CXSD6273pjk嘉泰姆	SOP-14pjk嘉泰姆 QSOP-16pjk嘉泰姆 QFN4x4-16pjk嘉泰姆	VM pjk嘉泰姆	1 pjk嘉泰姆	1 pjk嘉泰姆	30pjk嘉泰姆	2.9 pjk嘉泰姆	13.2pjk嘉泰姆	0.9pjk嘉泰姆	12 pjk嘉泰姆	8000pjk嘉泰姆
CXSD6274pjk嘉泰姆	SOP-8pjk嘉泰姆	VM pjk嘉泰姆	1pjk嘉泰姆	1pjk嘉泰姆	20pjk嘉泰姆	2.9 pjk嘉泰姆	13.2 pjk嘉泰姆	0.8pjk嘉泰姆	12pjk嘉泰姆	5000pjk嘉泰姆
CXSD6274Cpjk嘉泰姆	SOP-8pjk嘉泰姆	VMpjk嘉泰姆	1pjk嘉泰姆	1pjk嘉泰姆	20pjk嘉泰姆	2.9pjk嘉泰姆	13.2pjk嘉泰姆	0.8pjk嘉泰姆	12pjk嘉泰姆	5000pjk嘉泰姆
CXSD6275pjk嘉泰姆	QFN4x4-24pjk嘉泰姆	VMpjk嘉泰姆	2pjk嘉泰姆	1pjk嘉泰姆	60pjk嘉泰姆	3.1pjk嘉泰姆	13.2pjk嘉泰姆	0.6pjk嘉泰姆	12pjk嘉泰姆	5000pjk嘉泰姆
CXSD6276pjk嘉泰姆	SOP-8pjk嘉泰姆	VMpjk嘉泰姆	1pjk嘉泰姆	1pjk嘉泰姆	20pjk嘉泰姆	2.2pjk嘉泰姆	13.2pjk嘉泰姆	0.8pjk嘉泰姆	5~12pjk嘉泰姆	2100pjk嘉泰姆
CXSD6276Apjk嘉泰姆	SOP-8pjk嘉泰姆	VMpjk嘉泰姆	1pjk嘉泰姆	1pjk嘉泰姆	20pjk嘉泰姆	2.2pjk嘉泰姆	13.2pjk嘉泰姆	0.8pjk嘉泰姆	5~12pjk嘉泰姆	2100pjk嘉泰姆
CXSD6277/A/Bpjk嘉泰姆	SOP8\|TSSOP8pjk嘉泰姆	VMpjk嘉泰姆	1pjk嘉泰姆	1pjk嘉泰姆	5pjk嘉泰姆	5pjk嘉泰姆	13.2pjk嘉泰姆	1.25\|0.8pjk嘉泰姆	5~12pjk嘉泰姆	3000pjk嘉泰姆
CXSD6278pjk嘉泰姆	SOP-8pjk嘉泰姆	VMpjk嘉泰姆	1pjk嘉泰姆	1pjk嘉泰姆	10pjk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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