A4939 Datasheet, PDF (3/20 Pages) Allegro MicroSystems – Automotive Three Phase MOSFET Driver

A4939
Automotive Three Phase MOSFET Driver
Table of Contents
Specifications
2
Absolute Maximum Ratings
2
Thermal Characteristics
2
Pin-out Diagram and Terminal Lists
4
Functional Block Diagram
5
Electrical Characteristics
6
Functional Description
9
Input and Output Terminal Functions
9
Power Supplies
10
CP1,CP2, VREG
10
Sleep Mode
10
Gate Drives
10
High-Side Gate Drives (GHA, GHB, GHC)
10
Bootstrap Charge Management
10
Low-side Gate Drive (GLA, GLB, GLC)
11
Drain Source Voltage Monitor
11
Logic Control Inputs
12
Diagnostics
12
Fault States
12
Low Drop Out (LDO) Regulator
14
Applications Information
15
Power Bridge Management Using PWM Control 15
Bootstrap Capacitor Selection
15
Bootstrap Charging
16
VREG Capacitor Selection
16
LDO Regulator Capacitor Selection
16
Supply Decoupling
16
Input/Output Structures
17
Layout Recommendations
18
Package Outline Drawing
19
Allegro MicroSystems, LLC
3
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com