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：246

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lWM嘉泰姆

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

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

1.）Voltage-Mode Operation with Current SharinglWM嘉泰姆
Adjustable Feedback CompensationlWM嘉泰姆
Fast Load Transient ResponselWM嘉泰姆
2.）Operate with 8V~13.2VCC Supply VoltagelWM嘉泰姆
3.）Selectable External or Internal 0.6V ReferencelWM嘉泰姆
±1.5% Accuracy Over TemperaturelWM嘉泰姆
4.）Support Single- and Two-Phase OperationslWM嘉泰姆
5.）5VCC and Buffered Reference OutputslWM嘉泰姆
6.）8~12V Gate Drivers with Internal Bootstrap DiodelWM嘉泰姆
7.）Lossless Inductor DCR Current SensinglWM嘉泰姆
8.）Selectable Operation FrequencylWM嘉泰姆
150k/300k/400kHz per PhaselWM嘉泰姆
9.）Power-OK Indicator OutputlWM嘉泰姆
Regulated 1.5V on REFOUT/POKlWM嘉泰姆
10.）Adjustable Over-Current Protection (OCP)lWM嘉泰姆
11.）Accurate Load Line (DROOP) ProgramminglWM嘉泰姆
12.）Adjustable Soft-StartlWM嘉泰姆
13.）Over-Voltage Protection (OVP)lWM嘉泰姆
14.）Under-Voltage Protection (UVP)lWM嘉泰姆
15.）Over-Temperature Protection (OTP)lWM嘉泰姆
16.）QFN4x4 24-Lead Package (QFN4x4-24A)lWM嘉泰姆
17.）Lead Free and Green Devices Available (RoHS Compliant)lWM嘉泰姆
三,应用范围 (Applications)lWM嘉泰姆

Graphics Card GPU Core Power SupplylWM嘉泰姆

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

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

QQ截图20160419174301.jpg lWM嘉泰姆

五,产品封装图 (Package)lWM嘉泰姆
lWM嘉泰姆
FUNCTIONlWM嘉泰姆

PINlWM嘉泰姆		FUNCTIONlWM嘉泰姆
NO.lWM嘉泰姆	NAMElWM嘉泰姆	FUNCTIONlWM嘉泰姆
1lWM嘉泰姆	UGATE1lWM嘉泰姆	High-side Gate Driver Output for channel 1. Connect this pin to the gate of high-side MOSFET.lWM嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine whenlWM嘉泰姆 the high-side MOSFET has turned off.lWM嘉泰姆
2lWM嘉泰姆	BOOT1lWM嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 1. Connect the BootstraplWM嘉泰姆 capacitor between the BOOT1 pin and the PHASE1 pin to form a bootstrap circuit. The lWM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.lWM嘉泰姆
3lWM嘉泰姆	5VCClWM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.lWM嘉泰姆
4lWM嘉泰姆	AGNDlWM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.lWM嘉泰姆
5lWM嘉泰姆	MODElWM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.lWM嘉泰姆
6lWM嘉泰姆	CSP1lWM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.lWM嘉泰姆
7lWM嘉泰姆	CSN1lWM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.lWM嘉泰姆
8lWM嘉泰姆	CSN2lWM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.lWM嘉泰姆
9lWM嘉泰姆	CSP2lWM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.lWM嘉泰姆

lWM嘉泰姆

PINlWM嘉泰姆		FUNCTIONlWM嘉泰姆
NO.lWM嘉泰姆	NAMElWM嘉泰姆
10lWM嘉泰姆	DROOPlWM嘉泰姆	Load Line (droop) Setting. Connect a resistor between this pin and AGND to set the droop. AlWM嘉泰姆 sourcing current, proportional to output current is present on the DROOP pin. The droop scalelWM嘉泰姆 factor is set by the resistors (connected with CSP1, CSP2, and DROOP), resistance of the outputlWM嘉泰姆 inductors, and the internal voltage divider with the ratio of 5%.lWM嘉泰姆
11lWM嘉泰姆	RTlWM嘉泰姆	Operating Frequency Setting. The three-level input pin sets the operating frequency for eachlWM嘉泰姆 channel.lWM嘉泰姆
		RTlWM嘉泰姆	Operating Frequency (kHz)lWM嘉泰姆
		GNDlWM嘉泰姆	150lWM嘉泰姆
		FloatinglWM嘉泰姆	300lWM嘉泰姆
		5VCClWM嘉泰姆	400lWM嘉泰姆
12lWM嘉泰姆	COMPlWM嘉泰姆	Error Amplifier Output. Connect the compensation network between COMP, FB, and VOUT for TypelWM嘉泰姆 2 or Type 3 feedback compensation.lWM嘉泰姆
13lWM嘉泰姆	FBlWM嘉泰姆	Feedback Voltage. This pin is the inverting input to the error comparator. A resistor divider fromlWM嘉泰姆 the output to the AGND is used to set the regulation voltage.lWM嘉泰姆
14lWM嘉泰姆	SSlWM嘉泰姆	Soft-start Current Output. Connect a capacitor from this pin to the AGND to set the soft-startlWM嘉泰姆 interval. Pulling the voltage on this pin below 0.5V causes COMP to pull low and then shuts off thelWM嘉泰姆 output.lWM嘉泰姆
15lWM嘉泰姆	REFIN/ENlWM嘉泰姆	External Reference and Enable Input. The IC uses the voltage (VREFIN/EN) as reference voltage oflWM嘉泰姆 the converter with soft-start control. If this pin is driven by an external voltage ranged from 0.4V tolWM嘉泰姆 2V. The IC is disabled if the voltage is below 0.4V (typical). If external reference is not available,lWM嘉泰姆 then connect this pin to 5VCC for internal 0.6V reference.lWM嘉泰姆
16lWM嘉泰姆	REFOUT/POlWM嘉泰姆 KlWM嘉泰姆	Power-OK and 1.5V Reference Output. This pin is a reference output used to indicate the statuslWM嘉泰姆 of the voltages on SS pin and FB pin. REFOUT/POK provides 1.5V reference if VFB> 87.5% oflWM嘉泰姆 reference (VR).lWM嘉泰姆
17lWM嘉泰姆	BOOT2lWM嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 2. Connect the BootstraplWM嘉泰姆 capacitor between the BOOT2 pin and the PHASE2 pin to form a bootstrap circuit. The bootstraplWM嘉泰姆 capacitor provides the charge to turn on the high-side MOSFET. Typical values for CBOOT rangelWM嘉泰姆 from 0.1μF to 1μF. Ensure that CBOOT is placed near the IC.lWM嘉泰姆
18lWM嘉泰姆	UGATE2lWM嘉泰姆	High-side Gate Driver Output for Channel 2. Connect this pin to the gate of high-side MOSFET.lWM嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when thelWM嘉泰姆 high-side MOSFET has turned off.lWM嘉泰姆
19lWM嘉泰姆	PHASE2lWM嘉泰姆	Switch Node for Channel 2. Connect this pin to the source of high-side MOSFET and the drain oflWM嘉泰姆 the low-side MOSFET. This pin is used as sink for UGATE2 driver. This pin is also monitored bylWM嘉泰姆 the adaptive shoot-through protection circuitry to determine when the high-side MOSFET haslWM嘉泰姆 turned off. An Schottky diode between this pin and the ground is recommended to reducelWM嘉泰姆 negative transient voltage that is common in a power supply system.lWM嘉泰姆
20lWM嘉泰姆	LGATE2lWM嘉泰姆	Low-side Gate Driver Output for Channel 2. Connect this pin to the gate of low-side MOSFET.lWM嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when thelWM嘉泰姆 low-side MOSFET has turned off.lWM嘉泰姆
21lWM嘉泰姆	VCCDRVlWM嘉泰姆	Drive for External Linear Regulator. This pin is the drive output for the external linear regulator.lWM嘉泰姆 Connect this pin to base/gate of NPN/NMOS transistor as the pass element.lWM嘉泰姆
22lWM嘉泰姆	VCClWM嘉泰姆	Supply Voltage. This pin along with VCCDRV pin and external pass element provides 8.5VlWM嘉泰姆 regulated bias supply, low-side gate drivers, and the bootstrap circuit for high-side drivers. This pinlWM嘉泰姆 can receive a well-decoupled 8V~13.2V supply voltage alone if the VCCDRV is left open. EnsurelWM嘉泰姆 that this pin is bypassed by a ceramic capacitor next to the pin.lWM嘉泰姆
23lWM嘉泰姆	LGATE1lWM嘉泰姆	Low-side Gate Driver Output for Channel 1. Connect this pin to the gate of low-side MOSFET.lWM嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when thelWM嘉泰姆 low-side MOSFET has turned off.lWM嘉泰姆

PINlWM嘉泰姆		FUNCTIONlWM嘉泰姆
NO.lWM嘉泰姆	NAMElWM嘉泰姆	FUNCTIONlWM嘉泰姆
24lWM嘉泰姆	PHASE1lWM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.lWM嘉泰姆
25lWM嘉泰姆	PGNDlWM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.lWM嘉泰姆

六.电路原理图lWM嘉泰姆

lWM嘉泰姆

八,相关产品 更多同类产品...... lWM嘉泰姆

Switching Regulator > Buck ControllerlWM嘉泰姆
Part_No lWM嘉泰姆	Package lWM嘉泰姆	ArchilWM嘉泰姆 tectulWM嘉泰姆	PhaselWM嘉泰姆	No.oflWM嘉泰姆 PWMlWM嘉泰姆 OutputlWM嘉泰姆	Output lWM嘉泰姆 CurrentlWM嘉泰姆 (A) lWM嘉泰姆	InputlWM嘉泰姆 Voltage (V) lWM嘉泰姆		ReferencelWM嘉泰姆 VoltagelWM嘉泰姆 (V) lWM嘉泰姆	Bias lWM嘉泰姆 VoltagelWM嘉泰姆 (V) lWM嘉泰姆	QuiescentlWM嘉泰姆 CurrentlWM嘉泰姆 (uA) lWM嘉泰姆
Part_No lWM嘉泰姆	Package lWM嘉泰姆	ArchilWM嘉泰姆 tectulWM嘉泰姆	PhaselWM嘉泰姆	No.oflWM嘉泰姆 PWMlWM嘉泰姆 OutputlWM嘉泰姆	Output lWM嘉泰姆 CurrentlWM嘉泰姆 (A) lWM嘉泰姆	minlWM嘉泰姆	maxlWM嘉泰姆	ReferencelWM嘉泰姆 VoltagelWM嘉泰姆 (V) lWM嘉泰姆	Bias lWM嘉泰姆 VoltagelWM嘉泰姆 (V) lWM嘉泰姆	QuiescentlWM嘉泰姆 CurrentlWM嘉泰姆 (uA) lWM嘉泰姆
CXSD6273lWM嘉泰姆	SOP-14lWM嘉泰姆 QSOP-16lWM嘉泰姆 QFN4x4-16lWM嘉泰姆	VM lWM嘉泰姆	1 lWM嘉泰姆	1 lWM嘉泰姆	30lWM嘉泰姆	2.9 lWM嘉泰姆	13.2lWM嘉泰姆	0.9lWM嘉泰姆	12 lWM嘉泰姆	8000lWM嘉泰姆
CXSD6274lWM嘉泰姆	SOP-8lWM嘉泰姆	VM lWM嘉泰姆	1lWM嘉泰姆	1lWM嘉泰姆	20lWM嘉泰姆	2.9 lWM嘉泰姆	13.2 lWM嘉泰姆	0.8lWM嘉泰姆	12lWM嘉泰姆	5000lWM嘉泰姆
CXSD6274ClWM嘉泰姆	SOP-8lWM嘉泰姆	VMlWM嘉泰姆	1lWM嘉泰姆	1lWM嘉泰姆	20lWM嘉泰姆	2.9lWM嘉泰姆	13.2lWM嘉泰姆	0.8lWM嘉泰姆	12lWM嘉泰姆	5000lWM嘉泰姆
CXSD6275lWM嘉泰姆	QFN4x4-24lWM嘉泰姆	VMlWM嘉泰姆	2lWM嘉泰姆	1lWM嘉泰姆	60lWM嘉泰姆	3.1lWM嘉泰姆	13.2lWM嘉泰姆	0.6lWM嘉泰姆	12lWM嘉泰姆	5000lWM嘉泰姆
CXSD6276lWM嘉泰姆	SOP-8lWM嘉泰姆	VMlWM嘉泰姆	1lWM嘉泰姆	1lWM嘉泰姆	20lWM嘉泰姆	2.2lWM嘉泰姆	13.2lWM嘉泰姆	0.8lWM嘉泰姆	5~12lWM嘉泰姆	2100lWM嘉泰姆
CXSD6276AlWM嘉泰姆	SOP-8lWM嘉泰姆	VMlWM嘉泰姆	1lWM嘉泰姆	1lWM嘉泰姆	20lWM嘉泰姆	2.2lWM嘉泰姆	13.2lWM嘉泰姆	0.8lWM嘉泰姆	5~12lWM嘉泰姆	2100lWM嘉泰姆
CXSD6277/A/BlWM嘉泰姆	SOP8\|TSSOP8lWM嘉泰姆	VMlWM嘉泰姆	1lWM嘉泰姆	1lWM嘉泰姆	5lWM嘉泰姆	5lWM嘉泰姆	13.2lWM嘉泰姆	1.25\|0.8lWM嘉泰姆	5~12lWM嘉泰姆	3000lWM嘉泰姆
CXSD6278lWM嘉泰姆	SOP-8lWM嘉泰姆	VMlWM嘉泰姆	1lWM嘉泰姆	1lWM嘉泰姆	10lWM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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