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：416

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l2M嘉泰姆

1.产品概述         2.产品特点l2M嘉泰姆
3.应用范围       4.下载产品资料PDF文档 l2M嘉泰姆
5.产品封装图                     6.电路原理图             l2M嘉泰姆
7.功能概述       8.相关产品l2M嘉泰姆

一,产品概述(General Description) l2M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 controllerl2M嘉泰姆
IC and reduces the number of external parts for a cost and space saving power management solution.l2M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 linel2M嘉泰姆
voltage positioning (DROOP), channel-current balance,and over-current protection are accomplished through continuous inductor DCR current sensing.l2M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 duall2M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 thel2M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-startl2M嘉泰姆
to prevent wrong operation and limit the input surge current during power-on or start-up.l2M嘉泰姆
The CXSD6275 is available in a QFN4x4-24A packagel2M嘉泰姆
二.产品特点(Features)l2M嘉泰姆

1.）Voltage-Mode Operation with Current Sharingl2M嘉泰姆
Adjustable Feedback Compensationl2M嘉泰姆
Fast Load Transient Responsel2M嘉泰姆
2.）Operate with 8V~13.2VCC Supply Voltagel2M嘉泰姆
3.）Selectable External or Internal 0.6V Referencel2M嘉泰姆
±1.5% Accuracy Over Temperaturel2M嘉泰姆
4.）Support Single- and Two-Phase Operationsl2M嘉泰姆
5.）5VCC and Buffered Reference Outputsl2M嘉泰姆
6.）8~12V Gate Drivers with Internal Bootstrap Diodel2M嘉泰姆
7.）Lossless Inductor DCR Current Sensingl2M嘉泰姆
8.）Selectable Operation Frequencyl2M嘉泰姆
150k/300k/400kHz per Phasel2M嘉泰姆
9.）Power-OK Indicator Outputl2M嘉泰姆
Regulated 1.5V on REFOUT/POKl2M嘉泰姆
10.）Adjustable Over-Current Protection (OCP)l2M嘉泰姆
11.）Accurate Load Line (DROOP) Programmingl2M嘉泰姆
12.）Adjustable Soft-Startl2M嘉泰姆
13.）Over-Voltage Protection (OVP)l2M嘉泰姆
14.）Under-Voltage Protection (UVP)l2M嘉泰姆
15.）Over-Temperature Protection (OTP)l2M嘉泰姆
16.）QFN4x4 24-Lead Package (QFN4x4-24A)l2M嘉泰姆
17.）Lead Free and Green Devices Available (RoHS Compliant)l2M嘉泰姆
三,应用范围 (Applications)l2M嘉泰姆

Graphics Card GPU Core Power Supplyl2M嘉泰姆

Motherboard Chipset or DDR SDRAM Core PowerSupplyl2M嘉泰姆
On-board High Power PWM Converter with Out-l2M嘉泰姆

put Current up to 60Al2M嘉泰姆
四.下载产品资料PDF文档 l2M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！l2M嘉泰姆

QQ截图20160419174301.jpg l2M嘉泰姆

五,产品封装图 (Package)l2M嘉泰姆
l2M嘉泰姆
FUNCTIONl2M嘉泰姆

PINl2M嘉泰姆		FUNCTIONl2M嘉泰姆
NO.l2M嘉泰姆	NAMEl2M嘉泰姆	FUNCTIONl2M嘉泰姆
1l2M嘉泰姆	UGATE1l2M嘉泰姆	High-side Gate Driver Output for channel 1. Connect this pin to the gate of high-side MOSFET.l2M嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine whenl2M嘉泰姆 the high-side MOSFET has turned off.l2M嘉泰姆
2l2M嘉泰姆	BOOT1l2M嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 1. Connect the Bootstrapl2M嘉泰姆 capacitor between the BOOT1 pin and the PHASE1 pin to form a bootstrap circuit. The l2M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.l2M嘉泰姆
3l2M嘉泰姆	5VCCl2M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.l2M嘉泰姆
4l2M嘉泰姆	AGNDl2M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.l2M嘉泰姆
5l2M嘉泰姆	MODEl2M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.l2M嘉泰姆
6l2M嘉泰姆	CSP1l2M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.l2M嘉泰姆
7l2M嘉泰姆	CSN1l2M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.l2M嘉泰姆
8l2M嘉泰姆	CSN2l2M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.l2M嘉泰姆
9l2M嘉泰姆	CSP2l2M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.l2M嘉泰姆

l2M嘉泰姆

PINl2M嘉泰姆		FUNCTIONl2M嘉泰姆
NO.l2M嘉泰姆	NAMEl2M嘉泰姆
10l2M嘉泰姆	DROOPl2M嘉泰姆	Load Line (droop) Setting. Connect a resistor between this pin and AGND to set the droop. Al2M嘉泰姆 sourcing current, proportional to output current is present on the DROOP pin. The droop scalel2M嘉泰姆 factor is set by the resistors (connected with CSP1, CSP2, and DROOP), resistance of the outputl2M嘉泰姆 inductors, and the internal voltage divider with the ratio of 5%.l2M嘉泰姆
11l2M嘉泰姆	RTl2M嘉泰姆	Operating Frequency Setting. The three-level input pin sets the operating frequency for eachl2M嘉泰姆 channel.l2M嘉泰姆
		RTl2M嘉泰姆	Operating Frequency (kHz)l2M嘉泰姆
		GNDl2M嘉泰姆	150l2M嘉泰姆
		Floatingl2M嘉泰姆	300l2M嘉泰姆
		5VCCl2M嘉泰姆	400l2M嘉泰姆
12l2M嘉泰姆	COMPl2M嘉泰姆	Error Amplifier Output. Connect the compensation network between COMP, FB, and VOUT for Typel2M嘉泰姆 2 or Type 3 feedback compensation.l2M嘉泰姆
13l2M嘉泰姆	FBl2M嘉泰姆	Feedback Voltage. This pin is the inverting input to the error comparator. A resistor divider froml2M嘉泰姆 the output to the AGND is used to set the regulation voltage.l2M嘉泰姆
14l2M嘉泰姆	SSl2M嘉泰姆	Soft-start Current Output. Connect a capacitor from this pin to the AGND to set the soft-startl2M嘉泰姆 interval. Pulling the voltage on this pin below 0.5V causes COMP to pull low and then shuts off thel2M嘉泰姆 output.l2M嘉泰姆
15l2M嘉泰姆	REFIN/ENl2M嘉泰姆	External Reference and Enable Input. The IC uses the voltage (VREFIN/EN) as reference voltage ofl2M嘉泰姆 the converter with soft-start control. If this pin is driven by an external voltage ranged from 0.4V tol2M嘉泰姆 2V. The IC is disabled if the voltage is below 0.4V (typical). If external reference is not available,l2M嘉泰姆 then connect this pin to 5VCC for internal 0.6V reference.l2M嘉泰姆
16l2M嘉泰姆	REFOUT/POl2M嘉泰姆 Kl2M嘉泰姆	Power-OK and 1.5V Reference Output. This pin is a reference output used to indicate the statusl2M嘉泰姆 of the voltages on SS pin and FB pin. REFOUT/POK provides 1.5V reference if VFB> 87.5% ofl2M嘉泰姆 reference (VR).l2M嘉泰姆
17l2M嘉泰姆	BOOT2l2M嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 2. Connect the Bootstrapl2M嘉泰姆 capacitor between the BOOT2 pin and the PHASE2 pin to form a bootstrap circuit. The bootstrapl2M嘉泰姆 capacitor provides the charge to turn on the high-side MOSFET. Typical values for CBOOT rangel2M嘉泰姆 from 0.1μF to 1μF. Ensure that CBOOT is placed near the IC.l2M嘉泰姆
18l2M嘉泰姆	UGATE2l2M嘉泰姆	High-side Gate Driver Output for Channel 2. Connect this pin to the gate of high-side MOSFET.l2M嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when thel2M嘉泰姆 high-side MOSFET has turned off.l2M嘉泰姆
19l2M嘉泰姆	PHASE2l2M嘉泰姆	Switch Node for Channel 2. Connect this pin to the source of high-side MOSFET and the drain ofl2M嘉泰姆 the low-side MOSFET. This pin is used as sink for UGATE2 driver. This pin is also monitored byl2M嘉泰姆 the adaptive shoot-through protection circuitry to determine when the high-side MOSFET hasl2M嘉泰姆 turned off. An Schottky diode between this pin and the ground is recommended to reducel2M嘉泰姆 negative transient voltage that is common in a power supply system.l2M嘉泰姆
20l2M嘉泰姆	LGATE2l2M嘉泰姆	Low-side Gate Driver Output for Channel 2. Connect this pin to the gate of low-side MOSFET.l2M嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when thel2M嘉泰姆 low-side MOSFET has turned off.l2M嘉泰姆
21l2M嘉泰姆	VCCDRVl2M嘉泰姆	Drive for External Linear Regulator. This pin is the drive output for the external linear regulator.l2M嘉泰姆 Connect this pin to base/gate of NPN/NMOS transistor as the pass element.l2M嘉泰姆
22l2M嘉泰姆	VCCl2M嘉泰姆	Supply Voltage. This pin along with VCCDRV pin and external pass element provides 8.5Vl2M嘉泰姆 regulated bias supply, low-side gate drivers, and the bootstrap circuit for high-side drivers. This pinl2M嘉泰姆 can receive a well-decoupled 8V~13.2V supply voltage alone if the VCCDRV is left open. Ensurel2M嘉泰姆 that this pin is bypassed by a ceramic capacitor next to the pin.l2M嘉泰姆
23l2M嘉泰姆	LGATE1l2M嘉泰姆	Low-side Gate Driver Output for Channel 1. Connect this pin to the gate of low-side MOSFET.l2M嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when thel2M嘉泰姆 low-side MOSFET has turned off.l2M嘉泰姆

PINl2M嘉泰姆		FUNCTIONl2M嘉泰姆
NO.l2M嘉泰姆	NAMEl2M嘉泰姆	FUNCTIONl2M嘉泰姆
24l2M嘉泰姆	PHASE1l2M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.l2M嘉泰姆
25l2M嘉泰姆	PGNDl2M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.l2M嘉泰姆

六.电路原理图l2M嘉泰姆

l2M嘉泰姆

八,相关产品 更多同类产品...... l2M嘉泰姆

Switching Regulator > Buck Controllerl2M嘉泰姆
Part_No l2M嘉泰姆	Package l2M嘉泰姆	Archil2M嘉泰姆 tectul2M嘉泰姆	Phasel2M嘉泰姆	No.ofl2M嘉泰姆 PWMl2M嘉泰姆 Outputl2M嘉泰姆	Output l2M嘉泰姆 Currentl2M嘉泰姆 (A) l2M嘉泰姆	Inputl2M嘉泰姆 Voltage (V) l2M嘉泰姆		Referencel2M嘉泰姆 Voltagel2M嘉泰姆 (V) l2M嘉泰姆	Bias l2M嘉泰姆 Voltagel2M嘉泰姆 (V) l2M嘉泰姆	Quiescentl2M嘉泰姆 Currentl2M嘉泰姆 (uA) l2M嘉泰姆
Part_No l2M嘉泰姆	Package l2M嘉泰姆	Archil2M嘉泰姆 tectul2M嘉泰姆	Phasel2M嘉泰姆	No.ofl2M嘉泰姆 PWMl2M嘉泰姆 Outputl2M嘉泰姆	Output l2M嘉泰姆 Currentl2M嘉泰姆 (A) l2M嘉泰姆	minl2M嘉泰姆	maxl2M嘉泰姆	Referencel2M嘉泰姆 Voltagel2M嘉泰姆 (V) l2M嘉泰姆	Bias l2M嘉泰姆 Voltagel2M嘉泰姆 (V) l2M嘉泰姆	Quiescentl2M嘉泰姆 Currentl2M嘉泰姆 (uA) l2M嘉泰姆
CXSD6273l2M嘉泰姆	SOP-14l2M嘉泰姆 QSOP-16l2M嘉泰姆 QFN4x4-16l2M嘉泰姆	VM l2M嘉泰姆	1 l2M嘉泰姆	1 l2M嘉泰姆	30l2M嘉泰姆	2.9 l2M嘉泰姆	13.2l2M嘉泰姆	0.9l2M嘉泰姆	12 l2M嘉泰姆	8000l2M嘉泰姆
CXSD6274l2M嘉泰姆	SOP-8l2M嘉泰姆	VM l2M嘉泰姆	1l2M嘉泰姆	1l2M嘉泰姆	20l2M嘉泰姆	2.9 l2M嘉泰姆	13.2 l2M嘉泰姆	0.8l2M嘉泰姆	12l2M嘉泰姆	5000l2M嘉泰姆
CXSD6274Cl2M嘉泰姆	SOP-8l2M嘉泰姆	VMl2M嘉泰姆	1l2M嘉泰姆	1l2M嘉泰姆	20l2M嘉泰姆	2.9l2M嘉泰姆	13.2l2M嘉泰姆	0.8l2M嘉泰姆	12l2M嘉泰姆	5000l2M嘉泰姆
CXSD6275l2M嘉泰姆	QFN4x4-24l2M嘉泰姆	VMl2M嘉泰姆	2l2M嘉泰姆	1l2M嘉泰姆	60l2M嘉泰姆	3.1l2M嘉泰姆	13.2l2M嘉泰姆	0.6l2M嘉泰姆	12l2M嘉泰姆	5000l2M嘉泰姆
CXSD6276l2M嘉泰姆	SOP-8l2M嘉泰姆	VMl2M嘉泰姆	1l2M嘉泰姆	1l2M嘉泰姆	20l2M嘉泰姆	2.2l2M嘉泰姆	13.2l2M嘉泰姆	0.8l2M嘉泰姆	5~12l2M嘉泰姆	2100l2M嘉泰姆
CXSD6276Al2M嘉泰姆	SOP-8l2M嘉泰姆	VMl2M嘉泰姆	1l2M嘉泰姆	1l2M嘉泰姆	20l2M嘉泰姆	2.2l2M嘉泰姆	13.2l2M嘉泰姆	0.8l2M嘉泰姆	5~12l2M嘉泰姆	2100l2M嘉泰姆
CXSD6277/A/Bl2M嘉泰姆	SOP8\|TSSOP8l2M嘉泰姆	VMl2M嘉泰姆	1l2M嘉泰姆	1l2M嘉泰姆	5l2M嘉泰姆	5l2M嘉泰姆	13.2l2M嘉泰姆	1.25\|0.8l2M嘉泰姆	5~12l2M嘉泰姆	3000l2M嘉泰姆
CXSD6278l2M嘉泰姆	SOP-8l2M嘉泰姆	VMl2M嘉泰姆	1l2M嘉泰姆	1l2M嘉泰姆	10l2M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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