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

首页 > 新闻中心 > 行业新闻

发表时间：2020-04-21浏览次数：225

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jjH嘉泰姆

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

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

1.）Voltage-Mode Operation with Current SharingjjH嘉泰姆
Adjustable Feedback CompensationjjH嘉泰姆
Fast Load Transient ResponsejjH嘉泰姆
2.）Operate with 8V~13.2VCC Supply VoltagejjH嘉泰姆
3.）Selectable External or Internal 0.6V ReferencejjH嘉泰姆
±1.5% Accuracy Over TemperaturejjH嘉泰姆
4.）Support Single- and Two-Phase OperationsjjH嘉泰姆
5.）5VCC and Buffered Reference OutputsjjH嘉泰姆
6.）8~12V Gate Drivers with Internal Bootstrap DiodejjH嘉泰姆
7.）Lossless Inductor DCR Current SensingjjH嘉泰姆
8.）Selectable Operation FrequencyjjH嘉泰姆
150k/300k/400kHz per PhasejjH嘉泰姆
9.）Power-OK Indicator OutputjjH嘉泰姆
Regulated 1.5V on REFOUT/POKjjH嘉泰姆
10.）Adjustable Over-Current Protection (OCP)jjH嘉泰姆
11.）Accurate Load Line (DROOP) ProgrammingjjH嘉泰姆
12.）Adjustable Soft-StartjjH嘉泰姆
13.）Over-Voltage Protection (OVP)jjH嘉泰姆
14.）Under-Voltage Protection (UVP)jjH嘉泰姆
15.）Over-Temperature Protection (OTP)jjH嘉泰姆
16.）QFN4x4 24-Lead Package (QFN4x4-24A)jjH嘉泰姆
17.）Lead Free and Green Devices Available (RoHS Compliant)jjH嘉泰姆
三,应用范围 (Applications)jjH嘉泰姆

Graphics Card GPU Core Power SupplyjjH嘉泰姆

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

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

QQ截图20160419174301.jpg jjH嘉泰姆

五,产品封装图 (Package)jjH嘉泰姆
jjH嘉泰姆
FUNCTIONjjH嘉泰姆

PINjjH嘉泰姆		FUNCTIONjjH嘉泰姆
NO.jjH嘉泰姆	NAMEjjH嘉泰姆	FUNCTIONjjH嘉泰姆
1jjH嘉泰姆	UGATE1jjH嘉泰姆	High-side Gate Driver Output for channel 1. Connect this pin to the gate of high-side MOSFET.jjH嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine whenjjH嘉泰姆 the high-side MOSFET has turned off.jjH嘉泰姆
2jjH嘉泰姆	BOOT1jjH嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 1. Connect the BootstrapjjH嘉泰姆 capacitor between the BOOT1 pin and the PHASE1 pin to form a bootstrap circuit. The jjH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.jjH嘉泰姆
3jjH嘉泰姆	5VCCjjH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.jjH嘉泰姆
4jjH嘉泰姆	AGNDjjH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.jjH嘉泰姆
5jjH嘉泰姆	MODEjjH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.jjH嘉泰姆
6jjH嘉泰姆	CSP1jjH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.jjH嘉泰姆
7jjH嘉泰姆	CSN1jjH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.jjH嘉泰姆
8jjH嘉泰姆	CSN2jjH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.jjH嘉泰姆
9jjH嘉泰姆	CSP2jjH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.jjH嘉泰姆

jjH嘉泰姆

PINjjH嘉泰姆		FUNCTIONjjH嘉泰姆
NO.jjH嘉泰姆	NAMEjjH嘉泰姆
10jjH嘉泰姆	DROOPjjH嘉泰姆	Load Line (droop) Setting. Connect a resistor between this pin and AGND to set the droop. AjjH嘉泰姆 sourcing current, proportional to output current is present on the DROOP pin. The droop scalejjH嘉泰姆 factor is set by the resistors (connected with CSP1, CSP2, and DROOP), resistance of the outputjjH嘉泰姆 inductors, and the internal voltage divider with the ratio of 5%.jjH嘉泰姆
11jjH嘉泰姆	RTjjH嘉泰姆	Operating Frequency Setting. The three-level input pin sets the operating frequency for eachjjH嘉泰姆 channel.jjH嘉泰姆
		RTjjH嘉泰姆	Operating Frequency (kHz)jjH嘉泰姆
		GNDjjH嘉泰姆	150jjH嘉泰姆
		FloatingjjH嘉泰姆	300jjH嘉泰姆
		5VCCjjH嘉泰姆	400jjH嘉泰姆
12jjH嘉泰姆	COMPjjH嘉泰姆	Error Amplifier Output. Connect the compensation network between COMP, FB, and VOUT for TypejjH嘉泰姆 2 or Type 3 feedback compensation.jjH嘉泰姆
13jjH嘉泰姆	FBjjH嘉泰姆	Feedback Voltage. This pin is the inverting input to the error comparator. A resistor divider fromjjH嘉泰姆 the output to the AGND is used to set the regulation voltage.jjH嘉泰姆
14jjH嘉泰姆	SSjjH嘉泰姆	Soft-start Current Output. Connect a capacitor from this pin to the AGND to set the soft-startjjH嘉泰姆 interval. Pulling the voltage on this pin below 0.5V causes COMP to pull low and then shuts off thejjH嘉泰姆 output.jjH嘉泰姆
15jjH嘉泰姆	REFIN/ENjjH嘉泰姆	External Reference and Enable Input. The IC uses the voltage (VREFIN/EN) as reference voltage ofjjH嘉泰姆 the converter with soft-start control. If this pin is driven by an external voltage ranged from 0.4V tojjH嘉泰姆 2V. The IC is disabled if the voltage is below 0.4V (typical). If external reference is not available,jjH嘉泰姆 then connect this pin to 5VCC for internal 0.6V reference.jjH嘉泰姆
16jjH嘉泰姆	REFOUT/POjjH嘉泰姆 KjjH嘉泰姆	Power-OK and 1.5V Reference Output. This pin is a reference output used to indicate the statusjjH嘉泰姆 of the voltages on SS pin and FB pin. REFOUT/POK provides 1.5V reference if VFB> 87.5% ofjjH嘉泰姆 reference (VR).jjH嘉泰姆
17jjH嘉泰姆	BOOT2jjH嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 2. Connect the BootstrapjjH嘉泰姆 capacitor between the BOOT2 pin and the PHASE2 pin to form a bootstrap circuit. The bootstrapjjH嘉泰姆 capacitor provides the charge to turn on the high-side MOSFET. Typical values for CBOOT rangejjH嘉泰姆 from 0.1μF to 1μF. Ensure that CBOOT is placed near the IC.jjH嘉泰姆
18jjH嘉泰姆	UGATE2jjH嘉泰姆	High-side Gate Driver Output for Channel 2. Connect this pin to the gate of high-side MOSFET.jjH嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when thejjH嘉泰姆 high-side MOSFET has turned off.jjH嘉泰姆
19jjH嘉泰姆	PHASE2jjH嘉泰姆	Switch Node for Channel 2. Connect this pin to the source of high-side MOSFET and the drain ofjjH嘉泰姆 the low-side MOSFET. This pin is used as sink for UGATE2 driver. This pin is also monitored byjjH嘉泰姆 the adaptive shoot-through protection circuitry to determine when the high-side MOSFET hasjjH嘉泰姆 turned off. An Schottky diode between this pin and the ground is recommended to reducejjH嘉泰姆 negative transient voltage that is common in a power supply system.jjH嘉泰姆
20jjH嘉泰姆	LGATE2jjH嘉泰姆	Low-side Gate Driver Output for Channel 2. Connect this pin to the gate of low-side MOSFET.jjH嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when thejjH嘉泰姆 low-side MOSFET has turned off.jjH嘉泰姆
21jjH嘉泰姆	VCCDRVjjH嘉泰姆	Drive for External Linear Regulator. This pin is the drive output for the external linear regulator.jjH嘉泰姆 Connect this pin to base/gate of NPN/NMOS transistor as the pass element.jjH嘉泰姆
22jjH嘉泰姆	VCCjjH嘉泰姆	Supply Voltage. This pin along with VCCDRV pin and external pass element provides 8.5VjjH嘉泰姆 regulated bias supply, low-side gate drivers, and the bootstrap circuit for high-side drivers. This pinjjH嘉泰姆 can receive a well-decoupled 8V~13.2V supply voltage alone if the VCCDRV is left open. EnsurejjH嘉泰姆 that this pin is bypassed by a ceramic capacitor next to the pin.jjH嘉泰姆
23jjH嘉泰姆	LGATE1jjH嘉泰姆	Low-side Gate Driver Output for Channel 1. Connect this pin to the gate of low-side MOSFET.jjH嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when thejjH嘉泰姆 low-side MOSFET has turned off.jjH嘉泰姆

PINjjH嘉泰姆		FUNCTIONjjH嘉泰姆
NO.jjH嘉泰姆	NAMEjjH嘉泰姆	FUNCTIONjjH嘉泰姆
24jjH嘉泰姆	PHASE1jjH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.jjH嘉泰姆
25jjH嘉泰姆	PGNDjjH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.jjH嘉泰姆

六.电路原理图jjH嘉泰姆

jjH嘉泰姆

八,相关产品 更多同类产品...... jjH嘉泰姆

Switching Regulator > Buck ControllerjjH嘉泰姆
Part_No jjH嘉泰姆	Package jjH嘉泰姆	ArchijjH嘉泰姆 tectujjH嘉泰姆	PhasejjH嘉泰姆	No.ofjjH嘉泰姆 PWMjjH嘉泰姆 OutputjjH嘉泰姆	Output jjH嘉泰姆 CurrentjjH嘉泰姆 (A) jjH嘉泰姆	InputjjH嘉泰姆 Voltage (V) jjH嘉泰姆		ReferencejjH嘉泰姆 VoltagejjH嘉泰姆 (V) jjH嘉泰姆	Bias jjH嘉泰姆 VoltagejjH嘉泰姆 (V) jjH嘉泰姆	QuiescentjjH嘉泰姆 CurrentjjH嘉泰姆 (uA) jjH嘉泰姆
Part_No jjH嘉泰姆	Package jjH嘉泰姆	ArchijjH嘉泰姆 tectujjH嘉泰姆	PhasejjH嘉泰姆	No.ofjjH嘉泰姆 PWMjjH嘉泰姆 OutputjjH嘉泰姆	Output jjH嘉泰姆 CurrentjjH嘉泰姆 (A) jjH嘉泰姆	minjjH嘉泰姆	maxjjH嘉泰姆	ReferencejjH嘉泰姆 VoltagejjH嘉泰姆 (V) jjH嘉泰姆	Bias jjH嘉泰姆 VoltagejjH嘉泰姆 (V) jjH嘉泰姆	QuiescentjjH嘉泰姆 CurrentjjH嘉泰姆 (uA) jjH嘉泰姆
CXSD6273jjH嘉泰姆	SOP-14jjH嘉泰姆 QSOP-16jjH嘉泰姆 QFN4x4-16jjH嘉泰姆	VM jjH嘉泰姆	1 jjH嘉泰姆	1 jjH嘉泰姆	30jjH嘉泰姆	2.9 jjH嘉泰姆	13.2jjH嘉泰姆	0.9jjH嘉泰姆	12 jjH嘉泰姆	8000jjH嘉泰姆
CXSD6274jjH嘉泰姆	SOP-8jjH嘉泰姆	VM jjH嘉泰姆	1jjH嘉泰姆	1jjH嘉泰姆	20jjH嘉泰姆	2.9 jjH嘉泰姆	13.2 jjH嘉泰姆	0.8jjH嘉泰姆	12jjH嘉泰姆	5000jjH嘉泰姆
CXSD6274CjjH嘉泰姆	SOP-8jjH嘉泰姆	VMjjH嘉泰姆	1jjH嘉泰姆	1jjH嘉泰姆	20jjH嘉泰姆	2.9jjH嘉泰姆	13.2jjH嘉泰姆	0.8jjH嘉泰姆	12jjH嘉泰姆	5000jjH嘉泰姆
CXSD6275jjH嘉泰姆	QFN4x4-24jjH嘉泰姆	VMjjH嘉泰姆	2jjH嘉泰姆	1jjH嘉泰姆	60jjH嘉泰姆	3.1jjH嘉泰姆	13.2jjH嘉泰姆	0.6jjH嘉泰姆	12jjH嘉泰姆	5000jjH嘉泰姆
CXSD6276jjH嘉泰姆	SOP-8jjH嘉泰姆	VMjjH嘉泰姆	1jjH嘉泰姆	1jjH嘉泰姆	20jjH嘉泰姆	2.2jjH嘉泰姆	13.2jjH嘉泰姆	0.8jjH嘉泰姆	5~12jjH嘉泰姆	2100jjH嘉泰姆
CXSD6276AjjH嘉泰姆	SOP-8jjH嘉泰姆	VMjjH嘉泰姆	1jjH嘉泰姆	1jjH嘉泰姆	20jjH嘉泰姆	2.2jjH嘉泰姆	13.2jjH嘉泰姆	0.8jjH嘉泰姆	5~12jjH嘉泰姆	2100jjH嘉泰姆
CXSD6277/A/BjjH嘉泰姆	SOP8\|TSSOP8jjH嘉泰姆	VMjjH嘉泰姆	1jjH嘉泰姆	1jjH嘉泰姆	5jjH嘉泰姆	5jjH嘉泰姆	13.2jjH嘉泰姆	1.25\|0.8jjH嘉泰姆	5~12jjH嘉泰姆	3000jjH嘉泰姆
CXSD6278jjH嘉泰姆	SOP-8jjH嘉泰姆	VMjjH嘉泰姆	1jjH嘉泰姆	1jjH嘉泰姆	10jjH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

发表评论

产品中心

电源管理

LED驱动电路

音频放大IC

电机风扇驱动芯片

MCU存储ADC时钟数据线

功率器件

隔离芯片

电池充电芯片

技术支持

产品方案

质量承诺

联系我们