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

发表时间：2020-04-21浏览次数：58

目录9IO嘉泰姆

1.产品概述         2.产品特点9IO嘉泰姆
3.应用范围       4.下载产品资料PDF文档 9IO嘉泰姆
5.产品封装图                     6.电路原理图             9IO嘉泰姆
7.功能概述       8.相关产品9IO嘉泰姆

一,产品概述(General Description) 9IO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 controller9IO嘉泰姆
IC and reduces the number of external parts for a cost and space saving power management solution.9IO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 line9IO嘉泰姆
voltage positioning (DROOP), channel-current balance,and over-current protection are accomplished through continuous inductor DCR current sensing.9IO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 dual9IO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 the9IO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-start9IO嘉泰姆
to prevent wrong operation and limit the input surge current during power-on or start-up.9IO嘉泰姆
The CXSD6275 is available in a QFN4x4-24A package9IO嘉泰姆
二.产品特点(Features)9IO嘉泰姆

1.）Voltage-Mode Operation with Current Sharing9IO嘉泰姆
Adjustable Feedback Compensation9IO嘉泰姆
Fast Load Transient Response9IO嘉泰姆
2.）Operate with 8V~13.2VCC Supply Voltage9IO嘉泰姆
3.）Selectable External or Internal 0.6V Reference9IO嘉泰姆
±1.5% Accuracy Over Temperature9IO嘉泰姆
4.）Support Single- and Two-Phase Operations9IO嘉泰姆
5.）5VCC and Buffered Reference Outputs9IO嘉泰姆
6.）8~12V Gate Drivers with Internal Bootstrap Diode9IO嘉泰姆
7.）Lossless Inductor DCR Current Sensing9IO嘉泰姆
8.）Selectable Operation Frequency9IO嘉泰姆
150k/300k/400kHz per Phase9IO嘉泰姆
9.）Power-OK Indicator Output9IO嘉泰姆
Regulated 1.5V on REFOUT/POK9IO嘉泰姆
10.）Adjustable Over-Current Protection (OCP)9IO嘉泰姆
11.）Accurate Load Line (DROOP) Programming9IO嘉泰姆
12.）Adjustable Soft-Start9IO嘉泰姆
13.）Over-Voltage Protection (OVP)9IO嘉泰姆
14.）Under-Voltage Protection (UVP)9IO嘉泰姆
15.）Over-Temperature Protection (OTP)9IO嘉泰姆
16.）QFN4x4 24-Lead Package (QFN4x4-24A)9IO嘉泰姆
17.）Lead Free and Green Devices Available (RoHS Compliant)9IO嘉泰姆
三,应用范围 (Applications)9IO嘉泰姆

Graphics Card GPU Core Power Supply9IO嘉泰姆

Motherboard Chipset or DDR SDRAM Core PowerSupply9IO嘉泰姆
On-board High Power PWM Converter with Out-9IO嘉泰姆

put Current up to 60A9IO嘉泰姆
四.下载产品资料PDF文档 9IO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！9IO嘉泰姆

QQ截图20160419174301.jpg 9IO嘉泰姆

五,产品封装图 (Package)9IO嘉泰姆
9IO嘉泰姆
FUNCTION9IO嘉泰姆

PIN9IO嘉泰姆		FUNCTION9IO嘉泰姆
NO.9IO嘉泰姆	NAME9IO嘉泰姆	FUNCTION9IO嘉泰姆
19IO嘉泰姆	UGATE19IO嘉泰姆	High-side Gate Driver Output for channel 1. Connect this pin to the gate of high-side MOSFET.9IO嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when9IO嘉泰姆 the high-side MOSFET has turned off.9IO嘉泰姆
29IO嘉泰姆	BOOT19IO嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 1. Connect the Bootstrap9IO嘉泰姆 capacitor between the BOOT1 pin and the PHASE1 pin to form a bootstrap circuit. The 9IO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.9IO嘉泰姆
39IO嘉泰姆	5VCC9IO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.9IO嘉泰姆
49IO嘉泰姆	AGND9IO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.9IO嘉泰姆
59IO嘉泰姆	MODE9IO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.9IO嘉泰姆
69IO嘉泰姆	CSP19IO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.9IO嘉泰姆
79IO嘉泰姆	CSN19IO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.9IO嘉泰姆
89IO嘉泰姆	CSN29IO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.9IO嘉泰姆
99IO嘉泰姆	CSP29IO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.9IO嘉泰姆

9IO嘉泰姆

PIN9IO嘉泰姆		FUNCTION9IO嘉泰姆
NO.9IO嘉泰姆	NAME9IO嘉泰姆
109IO嘉泰姆	DROOP9IO嘉泰姆	Load Line (droop) Setting. Connect a resistor between this pin and AGND to set the droop. A9IO嘉泰姆 sourcing current, proportional to output current is present on the DROOP pin. The droop scale9IO嘉泰姆 factor is set by the resistors (connected with CSP1, CSP2, and DROOP), resistance of the output9IO嘉泰姆 inductors, and the internal voltage divider with the ratio of 5%.9IO嘉泰姆
119IO嘉泰姆	RT9IO嘉泰姆	Operating Frequency Setting. The three-level input pin sets the operating frequency for each9IO嘉泰姆 channel.9IO嘉泰姆
		RT9IO嘉泰姆	Operating Frequency (kHz)9IO嘉泰姆
		GND9IO嘉泰姆	1509IO嘉泰姆
		Floating9IO嘉泰姆	3009IO嘉泰姆
		5VCC9IO嘉泰姆	4009IO嘉泰姆
129IO嘉泰姆	COMP9IO嘉泰姆	Error Amplifier Output. Connect the compensation network between COMP, FB, and VOUT for Type9IO嘉泰姆 2 or Type 3 feedback compensation.9IO嘉泰姆
139IO嘉泰姆	FB9IO嘉泰姆	Feedback Voltage. This pin is the inverting input to the error comparator. A resistor divider from9IO嘉泰姆 the output to the AGND is used to set the regulation voltage.9IO嘉泰姆
149IO嘉泰姆	SS9IO嘉泰姆	Soft-start Current Output. Connect a capacitor from this pin to the AGND to set the soft-start9IO嘉泰姆 interval. Pulling the voltage on this pin below 0.5V causes COMP to pull low and then shuts off the9IO嘉泰姆 output.9IO嘉泰姆
159IO嘉泰姆	REFIN/EN9IO嘉泰姆	External Reference and Enable Input. The IC uses the voltage (VREFIN/EN) as reference voltage of9IO嘉泰姆 the converter with soft-start control. If this pin is driven by an external voltage ranged from 0.4V to9IO嘉泰姆 2V. The IC is disabled if the voltage is below 0.4V (typical). If external reference is not available,9IO嘉泰姆 then connect this pin to 5VCC for internal 0.6V reference.9IO嘉泰姆
169IO嘉泰姆	REFOUT/PO9IO嘉泰姆 K9IO嘉泰姆	Power-OK and 1.5V Reference Output. This pin is a reference output used to indicate the status9IO嘉泰姆 of the voltages on SS pin and FB pin. REFOUT/POK provides 1.5V reference if VFB> 87.5% of9IO嘉泰姆 reference (VR).9IO嘉泰姆
179IO嘉泰姆	BOOT29IO嘉泰姆	Bootstrap Supply for the floating high-side gate driver of channel 2. Connect the Bootstrap9IO嘉泰姆 capacitor between the BOOT2 pin and the PHASE2 pin to form a bootstrap circuit. The bootstrap9IO嘉泰姆 capacitor provides the charge to turn on the high-side MOSFET. Typical values for CBOOT range9IO嘉泰姆 from 0.1μF to 1μF. Ensure that CBOOT is placed near the IC.9IO嘉泰姆
189IO嘉泰姆	UGATE29IO嘉泰姆	High-side Gate Driver Output for Channel 2. Connect this pin to the gate of high-side MOSFET.9IO嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when the9IO嘉泰姆 high-side MOSFET has turned off.9IO嘉泰姆
199IO嘉泰姆	PHASE29IO嘉泰姆	Switch Node for Channel 2. Connect this pin to the source of high-side MOSFET and the drain of9IO嘉泰姆 the low-side MOSFET. This pin is used as sink for UGATE2 driver. This pin is also monitored by9IO嘉泰姆 the adaptive shoot-through protection circuitry to determine when the high-side MOSFET has9IO嘉泰姆 turned off. An Schottky diode between this pin and the ground is recommended to reduce9IO嘉泰姆 negative transient voltage that is common in a power supply system.9IO嘉泰姆
209IO嘉泰姆	LGATE29IO嘉泰姆	Low-side Gate Driver Output for Channel 2. Connect this pin to the gate of low-side MOSFET.9IO嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when the9IO嘉泰姆 low-side MOSFET has turned off.9IO嘉泰姆
219IO嘉泰姆	VCCDRV9IO嘉泰姆	Drive for External Linear Regulator. This pin is the drive output for the external linear regulator.9IO嘉泰姆 Connect this pin to base/gate of NPN/NMOS transistor as the pass element.9IO嘉泰姆
229IO嘉泰姆	VCC9IO嘉泰姆	Supply Voltage. This pin along with VCCDRV pin and external pass element provides 8.5V9IO嘉泰姆 regulated bias supply, low-side gate drivers, and the bootstrap circuit for high-side drivers. This pin9IO嘉泰姆 can receive a well-decoupled 8V~13.2V supply voltage alone if the VCCDRV is left open. Ensure9IO嘉泰姆 that this pin is bypassed by a ceramic capacitor next to the pin.9IO嘉泰姆
239IO嘉泰姆	LGATE19IO嘉泰姆	Low-side Gate Driver Output for Channel 1. Connect this pin to the gate of low-side MOSFET.9IO嘉泰姆 This pin is monitored by the adaptive shoot-through protection circuitry to determine when the9IO嘉泰姆 low-side MOSFET has turned off.9IO嘉泰姆

PIN9IO嘉泰姆		FUNCTION9IO嘉泰姆
NO.9IO嘉泰姆	NAME9IO嘉泰姆	FUNCTION9IO嘉泰姆
249IO嘉泰姆	PHASE19IO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.9IO嘉泰姆
259IO嘉泰姆	PGND9IO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.9IO嘉泰姆

六.电路原理图9IO嘉泰姆

9IO嘉泰姆

八,相关产品 更多同类产品...... 9IO嘉泰姆

Switching Regulator > Buck Controller9IO嘉泰姆
Part_No 9IO嘉泰姆	Package 9IO嘉泰姆	Archi9IO嘉泰姆 tectu9IO嘉泰姆	Phase9IO嘉泰姆	No.of9IO嘉泰姆 PWM9IO嘉泰姆 Output9IO嘉泰姆	Output 9IO嘉泰姆 Current9IO嘉泰姆 (A) 9IO嘉泰姆	Input9IO嘉泰姆 Voltage (V) 9IO嘉泰姆		Reference9IO嘉泰姆 Voltage9IO嘉泰姆 (V) 9IO嘉泰姆	Bias 9IO嘉泰姆 Voltage9IO嘉泰姆 (V) 9IO嘉泰姆	Quiescent9IO嘉泰姆 Current9IO嘉泰姆 (uA) 9IO嘉泰姆
Part_No 9IO嘉泰姆	Package 9IO嘉泰姆	Archi9IO嘉泰姆 tectu9IO嘉泰姆	Phase9IO嘉泰姆	No.of9IO嘉泰姆 PWM9IO嘉泰姆 Output9IO嘉泰姆	Output 9IO嘉泰姆 Current9IO嘉泰姆 (A) 9IO嘉泰姆	min9IO嘉泰姆	max9IO嘉泰姆	Reference9IO嘉泰姆 Voltage9IO嘉泰姆 (V) 9IO嘉泰姆	Bias 9IO嘉泰姆 Voltage9IO嘉泰姆 (V) 9IO嘉泰姆	Quiescent9IO嘉泰姆 Current9IO嘉泰姆 (uA) 9IO嘉泰姆
CXSD62739IO嘉泰姆	SOP-149IO嘉泰姆 QSOP-169IO嘉泰姆 QFN4x4-169IO嘉泰姆	VM 9IO嘉泰姆	1 9IO嘉泰姆	1 9IO嘉泰姆	309IO嘉泰姆	2.9 9IO嘉泰姆	13.29IO嘉泰姆	0.99IO嘉泰姆	12 9IO嘉泰姆	80009IO嘉泰姆
CXSD62749IO嘉泰姆	SOP-89IO嘉泰姆	VM 9IO嘉泰姆	19IO嘉泰姆	19IO嘉泰姆	209IO嘉泰姆	2.9 9IO嘉泰姆	13.2 9IO嘉泰姆	0.89IO嘉泰姆	129IO嘉泰姆	50009IO嘉泰姆
CXSD6274C9IO嘉泰姆	SOP-89IO嘉泰姆	VM9IO嘉泰姆	19IO嘉泰姆	19IO嘉泰姆	209IO嘉泰姆	2.99IO嘉泰姆	13.29IO嘉泰姆	0.89IO嘉泰姆	129IO嘉泰姆	50009IO嘉泰姆
CXSD62759IO嘉泰姆	QFN4x4-249IO嘉泰姆	VM9IO嘉泰姆	29IO嘉泰姆	19IO嘉泰姆	609IO嘉泰姆	3.19IO嘉泰姆	13.29IO嘉泰姆	0.69IO嘉泰姆	129IO嘉泰姆	50009IO嘉泰姆
CXSD62769IO嘉泰姆	SOP-89IO嘉泰姆	VM9IO嘉泰姆	19IO嘉泰姆	19IO嘉泰姆	209IO嘉泰姆	2.29IO嘉泰姆	13.29IO嘉泰姆	0.89IO嘉泰姆	5~129IO嘉泰姆	21009IO嘉泰姆
CXSD6276A9IO嘉泰姆	SOP-89IO嘉泰姆	VM9IO嘉泰姆	19IO嘉泰姆	19IO嘉泰姆	209IO嘉泰姆	2.29IO嘉泰姆	13.29IO嘉泰姆	0.89IO嘉泰姆	5~129IO嘉泰姆	21009IO嘉泰姆
CXSD6277/A/B9IO嘉泰姆	SOP8\|TSSOP89IO嘉泰姆	VM9IO嘉泰姆	19IO嘉泰姆	19IO嘉泰姆	59IO嘉泰姆	59IO嘉泰姆	13.29IO嘉泰姆	1.25\|0.89IO嘉泰姆	5~129IO嘉泰姆	30009IO嘉泰姆
CXSD62789IO嘉泰姆	SOP-89IO嘉泰姆	VM9IO嘉泰姆	19IO嘉泰姆	19IO嘉泰姆	109IO嘉泰姆

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