CXSD6280两个同步降压型脉宽调制控制器高精度内部参考电压的线性控制器PWM控制器同步buck拓扑中的两个N沟道mosfet

发表时间：2020-04-21浏览次数：5

目录YAH嘉泰姆

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

一,产品概述(General Description) YAH嘉泰姆

The CXSD6280 has two synchronous buck PWM control-lersYAH嘉泰姆
and one linear controller with high precision internal references voltageYAH嘉泰姆
to offer accurate outputs. The PWM controllers are designed to driveYAH嘉泰姆
two N-channel MOSFETs in synchronous buck topology, and the linearYAH嘉泰姆
controller drives an external N-channel MOSFET. The device re-quiresYAH嘉泰姆
12V and 5V power supplies, if the 5V supply is not available, VCC12 canYAH嘉泰姆
offer an optional shunt regulator 5.8V for 5V supply.All outputs haveYAH嘉泰姆
independent soft-start and enable func-tions by SS/EN pins to control.YAH嘉泰姆
Connect a capacitor from each SS/EN pin to the ground for setting theYAH嘉泰姆
soft-start time, and pulling the SS/EN pin below 1V to disable regulator.YAH嘉泰姆
Pull the SS2/EN2 to VCC, enter the DDR mode,the SS1/EN1 controlsYAH嘉泰姆
both VOUT1 and VOUT2, and al-lows VOUT2 to track VOUT1. It alsoYAH嘉泰姆
offers the phase shift function by REFOUT pin to select the phase shiftYAH嘉泰姆
between VOUT1 and VOUT2 in DDR mode or Independent mode.YAH嘉泰姆
When all SS/EN pins exceed 3.3V and no faults are detected, the PGOODYAH嘉泰姆
pin goes high to indicate the regu-lators are ready. If any of the SS/EN pinsYAH嘉泰姆
goes below 3.2V or any of the outputs has a fault condition, the PGOOD pinYAH嘉泰姆
will be pulled low.YAH嘉泰姆
The internal oscillator is nominally 300kHz (keep the FS/SYNC pin openYAH嘉泰姆
or short to GND), and it offers the pro-grammable frequency function fromYAH嘉泰姆
70kHz to 800kHz; con-necting a resistor from FS/SYNC to VCC12 to decreaseYAH嘉泰姆
the frequency, conversely, connect a resistor from FS/SYNC to GND toYAH嘉泰姆
increase the frequency.The IC also pro-vides the synchronous frequencyYAH嘉泰姆
function. Connect the LGATE signal of another converter to FS/SYNC pin;YAH嘉泰姆
forc-ing the switching frequency to follow the external clock.
The possible synchronous frequency is from 150kHz to 800kHz. ThereYAH嘉泰姆
is no Rds(on) sensing or under-voltage sens-ing on CXSD6280. However, itYAH嘉泰姆
provides a simple short-circuit protection by monitoring the COMP1 and COMP2YAH嘉泰姆
for over-voltage. When any of two pins exceeds their trip point and the conditionYAH嘉泰姆
persists for 1-2 internal clock cycle (3-6μs at 300kHz), then it will shut downYAH嘉泰姆
all regulators.YAH嘉泰姆
二.产品特点(Features)YAH嘉泰姆

1.)Two Synchronous Buck Converters and A Linear RegulatorYAH嘉泰姆
2.)VIN Range up to 12VYAH嘉泰姆
3.)Input Power Supplies Require 12V and 5V orYAH嘉泰姆
4.)Use 12V to Generate a Shunt Regulator 5.8VYAH嘉泰姆
5.)0.6V Reference for VOUT1 and VOUT3 with 0.8% AccurateYAH嘉泰姆
6.)3.3V Reference for VOUT2 with 0.8% AccurateYAH嘉泰姆
7.)Buffered VTT Reference OutputYAH嘉泰姆
8.)Three Outputs have Independent Soft-Start and EnableYAH嘉泰姆
9.)Internal 300kHz Oscillator and ProgrammableYAH嘉泰姆
10.)Frequency Range from 70 kHz to 800kHzYAH嘉泰姆
11.)Synchronous Switching FrequencyYAH嘉泰姆
12.)DDR Mode or Independent Mode SelectionYAH嘉泰姆
13.)Phase Shift SelectionYAH嘉泰姆
14.)Power Good FunctionYAH嘉泰姆

15.)Short-Circuit Protection for VOUT1 and VOUT2YAH嘉泰姆
16.)Thermally Enhanced TSSOP-24P and QFN5x5-32 PackagesYAH嘉泰姆
17.)Lead Free and Green Devices Available (RoHS Compliant) YAH嘉泰姆
三,应用范围 (Applications)YAH嘉泰姆

Graphic CardsYAH嘉泰姆
DDR memory Power SuppliesYAH嘉泰姆
Low-Voltage Distributed Power SuppliesYAH嘉泰姆
四.下载产品资料PDF文档 YAH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！YAH嘉泰姆

QQ截图20160419174301.jpg YAH嘉泰姆

五,产品封装图 (Package)YAH嘉泰姆

YAH嘉泰姆
FUNCTIONNAMEFUNCTIONYAH嘉泰姆
These pins are the outputs of error amplifiers of their respective regulators. They areYAH嘉泰姆
used to set the compensation components.YAH嘉泰姆
These pins provide two functions. Connect a capacitor to the GND for setting theYAH嘉泰姆
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable theYAH嘉泰姆
respective output, leave open to enable the respective output.YAH嘉泰姆
These pins provide two functions. Connect a capacitor to the GND for setting theYAH嘉泰姆
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable theYAH嘉泰姆
respective output, leave open to enable the respective output.YAH嘉泰姆

PINYAH嘉泰姆			FUNCTIONYAH嘉泰姆
NO.YAH嘉泰姆		NAMEYAH嘉泰姆
TSSOP-24PYAH嘉泰姆	DFN5x5-32YAH嘉泰姆	NAMEYAH嘉泰姆

1YAH嘉泰姆	29YAH嘉泰姆	FB1YAH嘉泰姆	These pins are the inverting inputs of the error amplifiers of their respective regulators. They are used to set the output voltage and the compensation components.YAH嘉泰姆
2YAH嘉泰姆	30YAH嘉泰姆	COMP1YAH嘉泰姆	These pins are the outputs of error amplifiers of their respective regulators. They are used to set the compensation components.YAH嘉泰姆
3YAH嘉泰姆	31YAH嘉泰姆	COMP2YAH嘉泰姆
4YAH嘉泰姆	32YAH嘉泰姆	FB2YAH嘉泰姆	These pins are the inverting inputs of the error amplifiers of their respective regulators. They are used to set the output voltage and the compensation components.YAH嘉泰姆
5YAH嘉泰姆	1YAH嘉泰姆	REFINYAH嘉泰姆	This pin is the reference input voltage of error amplifier of the VOUT2. It also provides the voltage into a buffer, which is out on the REFOUT pin.YAH嘉泰姆
6YAH嘉泰姆	3YAH嘉泰姆	REFOUTYAH嘉泰姆	This pin provides a buffed voltage, which is from REFIN pin. In Independent mode, it can be used by other ICs. In DDR mode, it is from the VOUT1, and can be used as the VTT buffer. This pin also uses to select the phase shift (see table1). When this pinYAH嘉泰姆 pulls to VCC, the buffer is disabled and the REFOUT is not available for use. It is recommended that a 0.1μF capacitor is connected to the ground for stability.YAH嘉泰姆
7YAH嘉泰姆	4YAH嘉泰姆	SS1/EN1YAH嘉泰姆	These pins provide two functions. Connect a capacitor to the GND for setting the soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable the respective output, leave open to enable the respective output.YAH嘉泰姆
8YAH嘉泰姆	5YAH嘉泰姆	SS2/EN2YAH嘉泰姆
9YAH嘉泰姆	6YAH嘉泰姆	SS3/EN3YAH嘉泰姆
10YAH嘉泰姆	7YAH嘉泰姆	VREFYAH嘉泰姆	This pin provides a 3.3V reference voltage, which can be used by the REFIN pin or other ICs as a voltage reference. It is recommended that a 1μF capacitor is connected to ground for stabilityYAH嘉泰姆
11YAH嘉泰姆	8YAH嘉泰姆	DRIVE3YAH嘉泰姆	This pin drives the gate of an external N-channel MOSFET for linear regulator.YAH嘉泰姆
12YAH嘉泰姆	10YAH嘉泰姆	FB3YAH嘉泰姆	These pins are the inverting inputs of the error amplifiers of their respective regulators. They are used to set the output voltage and the compensation components.YAH嘉泰姆
13YAH嘉泰姆	11YAH嘉泰姆	FS/SYNCYAH嘉泰姆	This pin is used to adjust the switching frequency. Connecting a resistor from FS/SYNC pin to the ground increases the switching frequency. Conversely,connecting a resistor from this pin to the VCC12 reduces the switching frequency. In addition, this pin also provides synchronous frequency function. An external clock can be fed into this pin, and force the switching frequency to follow the external clock.YAH嘉泰姆
14YAH嘉泰姆	12YAH嘉泰姆	PGOODYAH嘉泰姆	This pin is an open drain device; connect a pull up resistor to the VCC for PGOOD function.YAH嘉泰姆
15YAH嘉泰姆	13YAH嘉泰姆	GNDYAH嘉泰姆	This pin is the signal ground pin. The metal thermal pad under the package is the IC substrate; connects the GND pin and metal thermal pad together on the board, and ties to the good GND plane for electrical and thermal conduction.YAH嘉泰姆
16YAH嘉泰姆	16YAH嘉泰姆	BOOT2YAH嘉泰姆	These pins provide the bootstrap voltage to the gate driver for driving the upper MOSFETs. It can be connected to a power voltage directly, but the difference voltage between the BOOT and VIN must be high enough to drive the upper MOSFETs.YAH嘉泰姆
17YAH嘉泰姆	14YAH嘉泰姆	UGATE2YAH嘉泰姆	These pins provide the gate driver for the upper MOSFETs of VOUT1 and VOUT2.YAH嘉泰姆
18YAH嘉泰姆	18,23YAH嘉泰姆	PGNDYAH嘉泰姆	This pin is the power ground pin for the gate driver and linear driver circuit. It should be tied to the GND.YAH嘉泰姆
19YAH嘉泰姆	20YAH嘉泰姆	LGATE2YAH嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.YAH嘉泰姆
20YAH嘉泰姆	21YAH嘉泰姆	LGATE1YAH嘉泰姆	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.YAH嘉泰姆
21YAH嘉泰姆	19, 22YAH嘉泰姆	VCC12YAH嘉泰姆	Power supply input pin. Connect a nominal 12V power supply to this pin for the gate driver. It is recommended that a decoupling capacitor (1 to 10μF) is connected to the GND for noise decoupling.YAH嘉泰姆

六.电路原理图YAH嘉泰姆

YAH嘉泰姆

七,功能概述YAH嘉泰姆

Soft-Start/EnableYAH嘉泰姆
The three SS/EN pins control the soft-start and enable or disable the controller. In Independent mode, the threeYAH嘉泰姆
regulators all have independent soft-start and enable functions. Connect a soft-start capacitor from each SS/ENYAH嘉泰姆
pin to the GND to set the soft-start interval, and an open drain logic signal for each SS/EN pin will enable or dis-YAH嘉泰姆
able the respective output.YAH嘉泰姆

八,相关产品 更多同类产品...... YAH嘉泰姆

Switching Regulator > Buck ControllerYAH嘉泰姆
Part_No YAH嘉泰姆	Package YAH嘉泰姆	ArchiYAH嘉泰姆 tectuYAH嘉泰姆	PhaseYAH嘉泰姆	No.ofYAH嘉泰姆 PWMYAH嘉泰姆 OutputYAH嘉泰姆	Output YAH嘉泰姆 CurrentYAH嘉泰姆 (A) YAH嘉泰姆	InputYAH嘉泰姆 Voltage (V) YAH嘉泰姆		ReferenceYAH嘉泰姆 VoltageYAH嘉泰姆 (V) YAH嘉泰姆	Bias YAH嘉泰姆 VoltageYAH嘉泰姆 (V) YAH嘉泰姆	QuiescentYAH嘉泰姆 CurrentYAH嘉泰姆 (uA) YAH嘉泰姆
Part_No YAH嘉泰姆	Package YAH嘉泰姆	ArchiYAH嘉泰姆 tectuYAH嘉泰姆	PhaseYAH嘉泰姆	No.ofYAH嘉泰姆 PWMYAH嘉泰姆 OutputYAH嘉泰姆	Output YAH嘉泰姆 CurrentYAH嘉泰姆 (A) YAH嘉泰姆	minYAH嘉泰姆	maxYAH嘉泰姆	ReferenceYAH嘉泰姆 VoltageYAH嘉泰姆 (V) YAH嘉泰姆	Bias YAH嘉泰姆 VoltageYAH嘉泰姆 (V) YAH嘉泰姆	QuiescentYAH嘉泰姆 CurrentYAH嘉泰姆 (uA) YAH嘉泰姆
CXSD6273YAH嘉泰姆	SOP-14YAH嘉泰姆 QSOP-16YAH嘉泰姆 QFN4x4-16YAH嘉泰姆	VM YAH嘉泰姆	1 YAH嘉泰姆	1 YAH嘉泰姆	30YAH嘉泰姆	2.9 YAH嘉泰姆	13.2YAH嘉泰姆	0.9YAH嘉泰姆	12 YAH嘉泰姆	8000YAH嘉泰姆
CXSD6274YAH嘉泰姆	SOP-8YAH嘉泰姆	VM YAH嘉泰姆	1YAH嘉泰姆	1YAH嘉泰姆	20YAH嘉泰姆	2.9 YAH嘉泰姆	13.2 YAH嘉泰姆	0.8YAH嘉泰姆	12YAH嘉泰姆	5000YAH嘉泰姆
CXSD6274CYAH嘉泰姆	SOP-8YAH嘉泰姆	VMYAH嘉泰姆	1YAH嘉泰姆	1YAH嘉泰姆	20YAH嘉泰姆	2.9YAH嘉泰姆	13.2YAH嘉泰姆	0.8YAH嘉泰姆	12YAH嘉泰姆	5000YAH嘉泰姆
CXSD6275YAH嘉泰姆	QFN4x4-24YAH嘉泰姆	VMYAH嘉泰姆	2YAH嘉泰姆	1YAH嘉泰姆	60YAH嘉泰姆	3.1YAH嘉泰姆	13.2YAH嘉泰姆	0.6YAH嘉泰姆	12YAH嘉泰姆	5000YAH嘉泰姆
CXSD6276YAH嘉泰姆	SOP-8YAH嘉泰姆	VMYAH嘉泰姆	1YAH嘉泰姆	1YAH嘉泰姆	20YAH嘉泰姆	2.2YAH嘉泰姆	13.2YAH嘉泰姆	0.8YAH嘉泰姆	5~12YAH嘉泰姆	2100YAH嘉泰姆
CXSD6276AYAH嘉泰姆	SOP-8YAH嘉泰姆	VMYAH嘉泰姆	1YAH嘉泰姆	1YAH嘉泰姆	20YAH嘉泰姆	2.2YAH嘉泰姆	13.2YAH嘉泰姆	0.8YAH嘉泰姆	5~12YAH嘉泰姆	2100YAH嘉泰姆
CXSD6277/A/BYAH嘉泰姆	SOP8\|TSSOP8YAH嘉泰姆	VMYAH嘉泰姆	1YAH嘉泰姆	1YAH嘉泰姆	5YAH嘉泰姆	5YAH嘉泰姆	13.2YAH嘉泰姆	1.25\|0.8YAH嘉泰姆	5~12YAH嘉泰姆	3000YAH嘉泰姆
CXSD6278YAH嘉泰姆	SOP-8YAH嘉泰姆	VMYAH嘉泰姆	1YAH嘉泰姆	1YAH嘉泰姆	10YAH嘉泰姆	3.3YAH嘉泰姆	5.5YAH嘉泰姆	0.8YAH嘉泰姆	5YAH嘉泰姆	2100YAH嘉泰姆
CXSD6279BYAH嘉泰姆	SOP-14YAH嘉泰姆	VM YAH嘉泰姆	1YAH嘉泰姆	1YAH嘉泰姆	10YAH嘉泰姆	5YAH嘉泰姆	13.2YAH嘉泰姆	0.8YAH嘉泰姆	12YAH嘉泰姆	2000YAH嘉泰姆
CXSD6280YAH嘉泰姆	TSSOP-24YAH嘉泰姆 \|QFN5x5-32YAH嘉泰姆	VMYAH嘉泰姆	1YAH嘉泰姆	2YAH嘉泰姆	20YAH嘉泰姆	5YAH嘉泰姆	13.2YAH嘉泰姆	0.6YAH嘉泰姆	5~12YAH嘉泰姆	4000YAH嘉泰姆
CXSD6281NYAH嘉泰姆	SOP14YAH嘉泰姆 QSOP16YAH嘉泰姆 QFN-16YAH嘉泰姆	VMYAH嘉泰姆	1YAH嘉泰姆	1YAH嘉泰姆	30YAH嘉泰姆	2.9YAH嘉泰姆	13.2YAH嘉泰姆	0.9YAH嘉泰姆	12YAH嘉泰姆	4000YAH嘉泰姆
CXSD6282YAH嘉泰姆	SOP-14YAH嘉泰姆	VMYAH嘉泰姆	1YAH嘉泰姆

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