Datasheet > A4915METTR-T

A4915METTR-T

更新时间： 2022-05-19 07:23:01

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
17页	378K
描述
3-Phase MOSFET Driver

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A4915METTR-T 数据手册

A4915

3-Phase MOSFET Driver

Description

Features and Benefits

• 5 to 50 V supply voltage

• Latched TSD with fault output

• Drives six N-channel high current MOSFETs

• Internally controlled synchronous rectification

• Speed voltage input enables internal PWM duty cycle

control of full bridge

• Center aligned PWM

• Internal UVLO and crossover current protection

• Hall switch inputs

The A4915 is designed for pulse width modulated (PWM)

current control of 3-phase brushless DC motors. The A4915

is capable of high current gate drive for 6 all N-channel power

MOSFETs. An internal charge pump ensures gate drive down

to 7 V supply and provides limited gate drive down to 5 V. A

bootstrap capacitor is used to generate a supply voltage greater

than the source voltage of the high side MOSFET, required

for N-channel MOSFETs.

Internalsynchronousrectificationcontrolcircuitryisprovided

to improve power dissipation in the external MOSFETs during

PWM operation. Internal circuit protection includes latched

thermal shutdown, dead time protection, and undervoltage

lockout. Special power up sequencing is not required.

• Adjustable dead time protection

• Low power sleep mode for battery-powered applications

Packages:

The A4915 is supplied in a 28-pin TSSOP with an exposed

thermal pad (suffix LP) and a 28-contact 5 × 5 mm QFN with

an exposed thermal pad (suffix ET). These packages are lead

(Pd) free, with 100% matte-tin leadframe plating.

28-pin TSSOP

28-contact QFN

with exposed thermal pad

5 mm × 5 mm × 0.90 mm

(LP package)

(ET package)

Not to scale

Functional Block Diagram

0.47 μF

VDD

A4915

VBB

Comm

Logic

Charge Pump

Regulator

47 V

TVS

CREG

CVBB1

CVBB2

VREG

VDD

Phase A

Bootstrap

Monitor

CVDD1

C_BOOTA

TDEAD

BRAKEn

DIR

High Side

Driver

GHA

GHB

GHC

R_GATE

dead

Control

Logic

ENABLE

VREG

To Phase B

To Phase C

GLA

GLB

GLC

OSC

R_GATE

Low Side

Driver

VDD

Voltage to

Duty

One of three phases shown

SPEED

FAULT

LSS

V_RESET

GND

A4915-DS, Rev. 1

12 3 4 5 6 7...17

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