Datasheet > A4927KLPTR-T

A4927KLPTR-T

更新时间： 2022-02-26 13:30:29

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
40页	857K
描述
Automotive Half-Bridge MOSFET Driver

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A4927KLPTR-T 数据手册

A4927

Automotive Half-Bridge MOSFET Driver

FEATURES AND BENEFITS

DESCRIPTION

TheA4927 is an N-channel power MOSFET driver capable of

• Half-bridge MOSFET driver

controlling MOSFETs connected in a half-bridge arrangement

and is specifically designed for automotive applications with

high-powerinductiveloads,suchasbrushDCmotorssolenoids

and actuators.

• Bootstrap gate drive for N-channel MOSFET bridge

• Cross-conduction protection with adjustable dead time

• Charge pump regulator for low supply voltage operation

• 5.5 to 50 V supply voltage operating range

• SPI-compatible serial interface

TheA4927 is intended for automotive systems that must meet

ASIL requirements. In common with other Allegro A²SIL^™

products, this device incorporates features to complement

proper system design, allowing users to achieve the required

ASIL level.

• Bridge control by direct logic inputs or serial interface

• Programmable gate drive

• Current sense amplifier

• Programmable diagnostics

• A²SIL™ product—device features for

safety-critical systems

A unique charge pump regulator provides full gate drive for

batteryvoltagesdownto5.5Vformostapplications.Abootstrap

capacitor is used to provide the above-battery supply voltage

required for N-channel MOSFETs.

APPLICATIONS

• Anti-lock braking systems (ABS)

• HVAC (blower fan)

• DC pumps (fuel, oil, water)

• Solenoids and actuators

The half bridge can be controlled by independent logic-level

inputs or through the SPI-compatible serial interface. The

external power MOSFETs are protected from shoot-through

by a programmable dead time.

• Similar industrial applications

Integrated diagnostics provide indication of multiple internal

faults, system faults, and power bridge faults, and can be

configured to protect the power MOSFETs under most short-

circuit conditions.

PACKAGE:

24-lead TSSOP with

exposed pad (suffix LP)

In addition to providing full access to the bridge control, the

serialinterfaceisalsousedtoalterprogrammablesettingssuch

as dead time, V_DSthreshold, and fault blank time. Detailed

diagnosticinformationcanbereadthroughtheserialinterface.

The A4927 is supplied in a 24-lead eTSSOP (suffix LP). This

package is lead (Pb) free, with 100% matte-tin leadframe

plating (suffix –T).

Not to scale

VBAT

ECU

A4927

Load

SPI

GND

Figure 1: Typical Application

A4927-DS, Rev. 1

April 24, 2017

12 3 4 5 6 7...40

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