Datasheet > A6861KLPTR-T

A6861KLPTR-T

更新时间： 2022-02-26 13:30:30

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
11页	392K
描述
Automotive 3-Phase Isolator MOSFET Driver

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A6861KLPTR-T 数据手册

A6861

Automotive 3-Phase Isolator MOSFET Driver

FEATURES AND BENEFITS

DESCRIPTION

• 3 floating N-channel MOSFET drives

• Maintains VGS with 100 kΩ gate-source resistors

• Integrated charge pump controller

The A6861 is an N-channel power MOSFET driver capable

of controlling MOSFETs connected as a 3-phase solid state

relay in phase-isolation applications. The A6861 is intended

for automotive systems that must meet ASIL requirements. In

safety critical applications motor isolation is a critical safety

requirementwhichiscurrentlyaddressedwithdiscretecircuitry

or relays.AllegroA^2-SIL^TMproducts include specific features

thatcomplimentpropersystemdesign,allowinguserstoachieve

up to ASIL-D system rating.

• 4.5 V-50 V Supply voltage operating range

• Independent TTL input for each phase

• 150°C ambient (165°C junction) continuous

• A^2-SIL^TMProduct – device features for safety critical

systems

APPLICATIONS

The A6861 has three independent floating gate drive outputs

to maintain the power MOSFETs in the on state over the full

supplyrangewithhighphase-voltageslewrates.Anintegrated

charge pump regulator provides the above battery supply

voltage necessary to maintain the power MOSFETs in the

on state continuously when the phase voltage is equal to the

battery voltage. The charge pump will maintain sufficient gate

drive (>7.5 V) for battery voltages down to 4.5 V with 100 kΩ

gate-source resistors.

• 3-phase safety disconnect systems

• Electric power steering (EPS)

• Electric braking

• 3-phase Solid State Relay driver

Package: 16-Lead TSSOP with exposed

thermal pad (suffix LP)

Thethreegatedrivescanbeindependentlycontrolledbyalogic

level control input. In typical applications the MOSFETs will

be switched on within 8 µs and will switch off within 1 µs.

Anundervoltagemonitorchecksthatthepumpedsupplyvoltage

is high enough to ensure that the MOSFETs are maintained in

a safe conducting state.

Not to scale.

Continued on the next page…

Typical Application Diagram

6861-DS, Rev. 4

12 3 4 5 6 7...11

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