UCD7242

更新时间： 2024-10-14 06:01:55

品牌	Logo	应用领域
德州仪器 - TI		驱动器
页数	文件大小	规格书
35页	1802K
描述
Digital Dual Synchronous-Buck Power Driver

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UCD7242 数据手册

UCD7242

www.ti.com

SLUS962 –JANUARY 2010

Digital Dual Synchronous-Buck Power Driver

Check for Samples: UCD7242

FEATURES

APPLICATIONS

•

Digitally-Controlled Synchronous-Buck Power

Stages

•

Fully Integrated Power Switches With Drivers

for Dual Synchronous Buck Converters

•

High Current Dual-Phase VRM/EVRD

Regulators for Desktop, Server, Telecom and

Notebook Processors

•

Full Compatibility With TI Fusion Digital Power

Supply Controllers, Such as the UCD92xx

Family

•

Wide Input Voltage Range: 4.75 V to 18 V

Operational Down to 2.2 V Input With an

External Bias Supply

MON

PWM-B

SRE-B

FLT-B

PWM-A

SRE-A

FLT-A

•

Up to 10A Output Current per Channel

Operational to 2 MHz Switching Frequency

DIS

High Side Current Limit With Current Limit

Flag

-A

-B

MON

BST-A

BST-B

•

Onboard Regulated 6 V Driver Supply From V_IN

Thermal Protection

BSW-A

SW-A

BSW-B

SW-B

Temperature Sense Output – Voltage

Proportional to Chip Temperature

•

UVLO and OVLO Circuits Ensure Proper Drive

Voltage

PGND

Rated From –40°C to 125°C Junction

Temperature

GND BP3

•

RoHS Compliant

Accurate On-Die Current Sensing (±5%)

DESCRIPTION

The UCD7242 is a complete power system ready to drive two independent buck power supplies (see Figure 1).

High side MOSFETs, low side MOSFETs, drivers, current sensing circuitry and necessary protection functions

are all integrated into one monolithic solution to facilitate minimum size and maximum efficiency. Driver circuits

provide high charge and discharge current for the high-side NMOS switch and the low-side NMOS synchronous

rectifier in a synchronous buck circuit. The MOSFET gates are driven to +6.25 V by an internally regulated V_GG

supply. The internal V_GGregulator can be disabled to permit the user to supply an independent gate drive

voltage. This flexibility allows a wide power conversion input voltage range of 2.2V to 18V. Internal under voltage

lockout (UVLO) logic ensures V_GGis good before allowing chip operation.

The synchronous rectifier enable (SRE) pin controls whether or not the low-side MOSFET is turned on when the

PWM signal is low. When SRE is high the part operates in continuous conduction mode for all loads. In this

mode the drive logic block uses the PWM signal to control both the high-side and low-side gate drive signals.

Dead time is also optimized to prevent cross conduction. When SRE is low, the part operates in discontinuous

conduction mode at light loads. In this mode the low-side MOSFET is always held off.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...35

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与UCD7242相关器件

型号	品牌	获取价格	描述	数据表
UCD7242_10	TI	获取价格	Digital Dual Synchronous-Buck Power Driver
UCD7242_101	TI	获取价格	Digital Dual Synchronous-Buck Power Driver
UCD7242-EP	TI	获取价格	数字双路同步降压功率驱动器，UCD7242-EP
UCD7242MRSJREP	TI	获取价格	数字双路同步降压功率驱动器，UCD7242-EP \| RSJ \| 32 \| -55 to
UCD7242RSJR	TI	获取价格	Digital Dual Synchronous-Buck Power Driver
UCD7242RSJT	TI	获取价格	Digital Dual Synchronous-Buck Power Driver
UCD74106	TI	获取价格	Synchronous-Buck Power Stage External Bias Supply
UCD74106RGMR	TI	获取价格	Synchronous-Buck Power Stage External Bias Supply
UCD74106RGMT	TI	获取价格	Synchronous-Buck Power Stage External Bias Supply
UCD74111	TI	获取价格	High-Current, Synchronous Buck Power Stage

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