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：291

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8yG嘉泰姆

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

一,产品概述(General Description) 8yG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 controller8yG嘉泰姆
IC and reduces the number of external parts for a cost and space saving power management solution.8yG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 line8yG嘉泰姆
voltage positioning (DROOP), channel-current balance,and over-current protection are accomplished through continuous inductor DCR current sensing.8yG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 dual8yG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 the8yG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-start8yG嘉泰姆
to prevent wrong operation and limit the input surge current during power-on or start-up.8yG嘉泰姆
The CXSD6275 is available in a QFN4x4-24A package8yG嘉泰姆
二.产品特点(Features)8yG嘉泰姆

1.）Voltage-Mode Operation with Current Sharing8yG嘉泰姆
Adjustable Feedback Compensation8yG嘉泰姆
Fast Load Transient Response8yG嘉泰姆
2.）Operate with 8V~13.2VCC Supply Voltage8yG嘉泰姆
3.）Selectable External or Internal 0.6V Reference8yG嘉泰姆
±1.5% Accuracy Over Temperature8yG嘉泰姆
4.）Support Single- and Two-Phase Operations8yG嘉泰姆
5.）5VCC and Buffered Reference Outputs8yG嘉泰姆
6.）8~12V Gate Drivers with Internal Bootstrap Diode8yG嘉泰姆
7.）Lossless Inductor DCR Current Sensing8yG嘉泰姆
8.）Selectable Operation Frequency8yG嘉泰姆
150k/300k/400kHz per Phase8yG嘉泰姆
9.）Power-OK Indicator Output8yG嘉泰姆
Regulated 1.5V on REFOUT/POK8yG嘉泰姆
10.）Adjustable Over-Current Protection (OCP)8yG嘉泰姆
11.）Accurate Load Line (DROOP) Programming8yG嘉泰姆
12.）Adjustable Soft-Start8yG嘉泰姆
13.）Over-Voltage Protection (OVP)8yG嘉泰姆
14.）Under-Voltage Protection (UVP)8yG嘉泰姆
15.）Over-Temperature Protection (OTP)8yG嘉泰姆
16.）QFN4x4 24-Lead Package (QFN4x4-24A)8yG嘉泰姆
17.）Lead Free and Green Devices Available (RoHS Compliant)8yG嘉泰姆
三,应用范围 (Applications)8yG嘉泰姆

Graphics Card GPU Core Power Supply8yG嘉泰姆

Motherboard Chipset or DDR SDRAM Core PowerSupply8yG嘉泰姆
On-board High Power PWM Converter with Out-8yG嘉泰姆

put Current up to 60A8yG嘉泰姆
四.下载产品资料PDF文档 8yG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！8yG嘉泰姆

QQ截图20160419174301.jpg 8yG嘉泰姆

五,产品封装图 (Package)8yG嘉泰姆
8yG嘉泰姆
FUNCTION8yG嘉泰姆

PIN8yG嘉泰姆		FUNCTION8yG嘉泰姆
NO.8yG嘉泰姆	NAME8yG嘉泰姆	FUNCTION8yG嘉泰姆
18yG嘉泰姆	UGATE18yG嘉泰姆	High-side Gate Driver Output for channel 1. Connect this pin to the gate of high-side MOSFET.8yG嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when8yG嘉泰姆 the high-side MOSFET has turned off.8yG嘉泰姆
28yG嘉泰姆	BOOT18yG嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 1. Connect the Bootstrap8yG嘉泰姆 capacitor between the BOOT1 pin and the PHASE1 pin to form a bootstrap circuit. The 8yG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.8yG嘉泰姆
38yG嘉泰姆	5VCC8yG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.8yG嘉泰姆
48yG嘉泰姆	AGND8yG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.8yG嘉泰姆
58yG嘉泰姆	MODE8yG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.8yG嘉泰姆
68yG嘉泰姆	CSP18yG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.8yG嘉泰姆
78yG嘉泰姆	CSN18yG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.8yG嘉泰姆
88yG嘉泰姆	CSN28yG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.8yG嘉泰姆
98yG嘉泰姆	CSP28yG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.8yG嘉泰姆

8yG嘉泰姆

PIN8yG嘉泰姆		FUNCTION8yG嘉泰姆
NO.8yG嘉泰姆	NAME8yG嘉泰姆
108yG嘉泰姆	DROOP8yG嘉泰姆	Load Line (droop) Setting. Connect a resistor between this pin and AGND to set the droop. A8yG嘉泰姆 sourcing current, proportional to output current is present on the DROOP pin. The droop scale8yG嘉泰姆 factor is set by the resistors (connected with CSP1, CSP2, and DROOP), resistance of the output8yG嘉泰姆 inductors, and the internal voltage divider with the ratio of 5%.8yG嘉泰姆
118yG嘉泰姆	RT8yG嘉泰姆	Operating Frequency Setting. The three-level input pin sets the operating frequency for each8yG嘉泰姆 channel.8yG嘉泰姆
		RT8yG嘉泰姆	Operating Frequency (kHz)8yG嘉泰姆
		GND8yG嘉泰姆	1508yG嘉泰姆
		Floating8yG嘉泰姆	3008yG嘉泰姆
		5VCC8yG嘉泰姆	4008yG嘉泰姆
128yG嘉泰姆	COMP8yG嘉泰姆	Error Amplifier Output. Connect the compensation network between COMP, FB, and VOUT for Type8yG嘉泰姆 2 or Type 3 feedback compensation.8yG嘉泰姆
138yG嘉泰姆	FB8yG嘉泰姆	Feedback Voltage. This pin is the inverting input to the error comparator. A resistor divider from8yG嘉泰姆 the output to the AGND is used to set the regulation voltage.8yG嘉泰姆
148yG嘉泰姆	SS8yG嘉泰姆	Soft-start Current Output. Connect a capacitor from this pin to the AGND to set the soft-start8yG嘉泰姆 interval. Pulling the voltage on this pin below 0.5V causes COMP to pull low and then shuts off the8yG嘉泰姆 output.8yG嘉泰姆
158yG嘉泰姆	REFIN/EN8yG嘉泰姆	External Reference and Enable Input. The IC uses the voltage (VREFIN/EN) as reference voltage of8yG嘉泰姆 the converter with soft-start control. If this pin is driven by an external voltage ranged from 0.4V to8yG嘉泰姆 2V. The IC is disabled if the voltage is below 0.4V (typical). If external reference is not available,8yG嘉泰姆 then connect this pin to 5VCC for internal 0.6V reference.8yG嘉泰姆
168yG嘉泰姆	REFOUT/PO8yG嘉泰姆 K8yG嘉泰姆	Power-OK and 1.5V Reference Output. This pin is a reference output used to indicate the status8yG嘉泰姆 of the voltages on SS pin and FB pin. REFOUT/POK provides 1.5V reference if VFB> 87.5% of8yG嘉泰姆 reference (VR).8yG嘉泰姆
178yG嘉泰姆	BOOT28yG嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 2. Connect the Bootstrap8yG嘉泰姆 capacitor between the BOOT2 pin and the PHASE2 pin to form a bootstrap circuit. The bootstrap8yG嘉泰姆 capacitor provides the charge to turn on the high-side MOSFET. Typical values for CBOOT range8yG嘉泰姆 from 0.1μF to 1μF. Ensure that CBOOT is placed near the IC.8yG嘉泰姆
188yG嘉泰姆	UGATE28yG嘉泰姆	High-side Gate Driver Output for Channel 2. Connect this pin to the gate of high-side MOSFET.8yG嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when the8yG嘉泰姆 high-side MOSFET has turned off.8yG嘉泰姆
198yG嘉泰姆	PHASE28yG嘉泰姆	Switch Node for Channel 2. Connect this pin to the source of high-side MOSFET and the drain of8yG嘉泰姆 the low-side MOSFET. This pin is used as sink for UGATE2 driver. This pin is also monitored by8yG嘉泰姆 the adaptive shoot-through protection circuitry to determine when the high-side MOSFET has8yG嘉泰姆 turned off. An Schottky diode between this pin and the ground is recommended to reduce8yG嘉泰姆 negative transient voltage that is common in a power supply system.8yG嘉泰姆
208yG嘉泰姆	LGATE28yG嘉泰姆	Low-side Gate Driver Output for Channel 2. Connect this pin to the gate of low-side MOSFET.8yG嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when the8yG嘉泰姆 low-side MOSFET has turned off.8yG嘉泰姆
218yG嘉泰姆	VCCDRV8yG嘉泰姆	Drive for External Linear Regulator. This pin is the drive output for the external linear regulator.8yG嘉泰姆 Connect this pin to base/gate of NPN/NMOS transistor as the pass element.8yG嘉泰姆
228yG嘉泰姆	VCC8yG嘉泰姆	Supply Voltage. This pin along with VCCDRV pin and external pass element provides 8.5V8yG嘉泰姆 regulated bias supply, low-side gate drivers, and the bootstrap circuit for high-side drivers. This pin8yG嘉泰姆 can receive a well-decoupled 8V~13.2V supply voltage alone if the VCCDRV is left open. Ensure8yG嘉泰姆 that this pin is bypassed by a ceramic capacitor next to the pin.8yG嘉泰姆
238yG嘉泰姆	LGATE18yG嘉泰姆	Low-side Gate Driver Output for Channel 1. Connect this pin to the gate of low-side MOSFET.8yG嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when the8yG嘉泰姆 low-side MOSFET has turned off.8yG嘉泰姆

PIN8yG嘉泰姆		FUNCTION8yG嘉泰姆
NO.8yG嘉泰姆	NAME8yG嘉泰姆	FUNCTION8yG嘉泰姆
248yG嘉泰姆	PHASE18yG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.8yG嘉泰姆
258yG嘉泰姆	PGND8yG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.8yG嘉泰姆

六.电路原理图8yG嘉泰姆

8yG嘉泰姆

八,相关产品 更多同类产品...... 8yG嘉泰姆

Switching Regulator > Buck Controller8yG嘉泰姆
Part_No 8yG嘉泰姆	Package 8yG嘉泰姆	Archi8yG嘉泰姆 tectu8yG嘉泰姆	Phase8yG嘉泰姆	No.of8yG嘉泰姆 PWM8yG嘉泰姆 Output8yG嘉泰姆	Output 8yG嘉泰姆 Current8yG嘉泰姆 (A) 8yG嘉泰姆	Input8yG嘉泰姆 Voltage (V) 8yG嘉泰姆		Reference8yG嘉泰姆 Voltage8yG嘉泰姆 (V) 8yG嘉泰姆	Bias 8yG嘉泰姆 Voltage8yG嘉泰姆 (V) 8yG嘉泰姆	Quiescent8yG嘉泰姆 Current8yG嘉泰姆 (uA) 8yG嘉泰姆
Part_No 8yG嘉泰姆	Package 8yG嘉泰姆	Archi8yG嘉泰姆 tectu8yG嘉泰姆	Phase8yG嘉泰姆	No.of8yG嘉泰姆 PWM8yG嘉泰姆 Output8yG嘉泰姆	Output 8yG嘉泰姆 Current8yG嘉泰姆 (A) 8yG嘉泰姆	min8yG嘉泰姆	max8yG嘉泰姆	Reference8yG嘉泰姆 Voltage8yG嘉泰姆 (V) 8yG嘉泰姆	Bias 8yG嘉泰姆 Voltage8yG嘉泰姆 (V) 8yG嘉泰姆	Quiescent8yG嘉泰姆 Current8yG嘉泰姆 (uA) 8yG嘉泰姆
CXSD62738yG嘉泰姆	SOP-148yG嘉泰姆 QSOP-168yG嘉泰姆 QFN4x4-168yG嘉泰姆	VM 8yG嘉泰姆	1 8yG嘉泰姆	1 8yG嘉泰姆	308yG嘉泰姆	2.9 8yG嘉泰姆	13.28yG嘉泰姆	0.98yG嘉泰姆	12 8yG嘉泰姆	80008yG嘉泰姆
CXSD62748yG嘉泰姆	SOP-88yG嘉泰姆	VM 8yG嘉泰姆	18yG嘉泰姆	18yG嘉泰姆	208yG嘉泰姆	2.9 8yG嘉泰姆	13.2 8yG嘉泰姆	0.88yG嘉泰姆	128yG嘉泰姆	50008yG嘉泰姆
CXSD6274C8yG嘉泰姆	SOP-88yG嘉泰姆	VM8yG嘉泰姆	18yG嘉泰姆	18yG嘉泰姆	208yG嘉泰姆	2.98yG嘉泰姆	13.28yG嘉泰姆	0.88yG嘉泰姆	128yG嘉泰姆	50008yG嘉泰姆
CXSD62758yG嘉泰姆	QFN4x4-248yG嘉泰姆	VM8yG嘉泰姆	28yG嘉泰姆	18yG嘉泰姆	608yG嘉泰姆	3.18yG嘉泰姆	13.28yG嘉泰姆	0.68yG嘉泰姆	128yG嘉泰姆	50008yG嘉泰姆
CXSD62768yG嘉泰姆	SOP-88yG嘉泰姆	VM8yG嘉泰姆	18yG嘉泰姆	18yG嘉泰姆	208yG嘉泰姆	2.28yG嘉泰姆	13.28yG嘉泰姆	0.88yG嘉泰姆	5~128yG嘉泰姆	21008yG嘉泰姆
CXSD6276A8yG嘉泰姆	SOP-88yG嘉泰姆	VM8yG嘉泰姆	18yG嘉泰姆	18yG嘉泰姆	208yG嘉泰姆	2.28yG嘉泰姆	13.28yG嘉泰姆	0.88yG嘉泰姆	5~128yG嘉泰姆	21008yG嘉泰姆
CXSD6277/A/B8yG嘉泰姆	SOP8\|TSSOP88yG嘉泰姆	VM8yG嘉泰姆	18yG嘉泰姆	18yG嘉泰姆	58yG嘉泰姆	58yG嘉泰姆	13.28yG嘉泰姆	1.25\|0.88yG嘉泰姆	5~128yG嘉泰姆	30008yG嘉泰姆
CXSD62788yG嘉泰姆	SOP-88yG嘉泰姆	VM8yG嘉泰姆	18yG嘉泰姆	18yG嘉泰姆	108yG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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