Rainbow-electronics ATA6832 User Manual download pdf

Features

• Supply Voltage up to 40V

• R

DSon

Typically 0.8Ω at 25°C, Maximum 1.8Ω at 200°C

• Up to 1.0A Output Current

• Three Half-bridge Outputs Formed by Three High-side and Three Low-side Drivers

• Capable of Switching Loads such as DC Motors, Bulbs, Resistors, Capacitors, and

Inductors

• PWM Capability up to 25 kHz for Each Output Controlled by External PWM Signal

• No Shoot-through Current

• Outputs Short-circuit Protected

• Selective Overtemperature Protection for Each Switch and Overtemperature

Prewarning

• Undervoltage Protection

• Various Diagnostic Functions such as Shorted Output, Open Load, Overtemperature

and Power-supply Fail Detection

• Serial Data Interface, Daisy Chain Capable, up to 2 MHz Clock Frequency

• QFN18 Package

1. Description

The ATA6832 is a fully protected driver IC specially designed for high temperature

applications. In mechatronic solutions, for example turbo charger or exhaust gas recir-

culation systems, many flaps have to be controlled by DC motor driver ICs which are

located very close to the hot engine or actuator where ambient temperatures up to

150°C are usual. Due to the advantages of SOI technology junction temperatures up

to 200°C are allowed. This enables new cost effective board design possibilities to

achieve complex mechatronic solutions.

The ATA6832 is a triple half-bridge driver to control up to 3 different loads by a micro-

controller in automotive and industrial applications. Each of the 3 high-side and 3

low-side drivers is capable of driving currents up to 1.0A. Due to the enhanced PWM

signal (up to 25 kHz) it is possible to generate a smooth control of, for example, a DC

motor without any noise. The drivers are internally connected to form 3 half-bridges

and can be controlled separately from a standard serial data interface, enabling all

kinds of loads, such as bulbs, resistors, capacitors and inductors, to be combined.

The IC design especially supports the application of H-bridges to drive DC motors.

Protection is guaranteed with respect to short-circuit conditions, overtemperature and

undervoltage. Various diagnostic functions and a very low quiescent current in

standby mode enable a wide range of applications. Automotive qualification (protec-

tion against conducted interferences, EMC protection and 2-kV ESD protection) gives

added value and enhanced quality for exacting requirements of automotive

applications.

High

Temperature

Triple

Half-bridge

Driver with SPI

and PWM

ATA6832

4951A–AUTO–08/06

1 2 3 4 5 6 ... 15 16

Summary of Contents

Page 1 - 1. Description

Features• Supply Voltage up to 40V• RDSon Typically 0.8Ω at 25°C, Maximum 1.8Ω at 200°C• Up to 1.0A Output Current• Three Half-bridge Outputs Formed b

Page 2 - Figure 1-1. Block Diagram

104951A–AUTO–08/06ATA68323.5 Thermal shutdown on Tj switch on185 210 235 °C B3.6Thermal shutdown hysteresis∆Tj switch off15 K B3.7Ratio thermal shutdo

Page 3 - 2. Pin Configuration

114951A–AUTO–08/06ATA68324.14Open load detection current ratioIOLoutLX/IOLoutHX1.2 34.15High-side output switch on delay(1),(2)VVS = 13V RLoad=30Ωtdon

Page 4 - 3. Functional Description

124951A–AUTO–08/06ATA68329. Serial Interface TimingNo. Parameters Test Conditions Pin Timing Chart No.(1)Symbol Min. Typ. Max. Unit Type*8 Serial Inte

Page 5

134951A–AUTO–08/06ATA6832Figure 9-1. Serial Interface Timing with Chart Number 1DOCSCLKCSDOCLKOutput DO: High level = 0.8 × VCC, low level = 0.2 × VCC

Page 6 - 3.3 Open-load Detection

144951A–AUTO–08/06ATA683210. Application CircuitFigure 10-1. Application Circuit 10.1 Application Notes• Connect the blocking capacitors at VCC and VS

Page 7 - 3.7 PWM Mode

154951A–AUTO–08/06ATA683212. Package Information 11. Ordering InformationExtended Type Number Package RemarksATA6832-PFQW QFN18 Taped and reeled, Pb-f

Page 8 - 6. Operating Range

Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise,

Page 9 - 8. Electrical Characteristics

24951A–AUTO–08/06ATA6832Figure 1-1. Block Diagram FaultdetectorFaultdetectorSIHS2LS2HS1LS1Controllogic5CLK6PWM7DO3CS4DIInput registerOuput registerSer

Page 10 - 4951A–AUTO–08/06

34951A–AUTO–08/06ATA68322. Pin ConfigurationFigure 2-1. Pinning QFN24 OUT3SOUT3FCSDICLKPWMOUT2FVS2VS1VCCGNDDOPGND3PGND1OUT1SOUT1PGND2OUT2S123456121110

Page 11

44951A–AUTO–08/06ATA68323. Functional Description3.1 Serial InterfaceData transfer starts with the falling edge of the CS signal. Data must appear at

Page 12 - 9. Serial Interface Timing

54951A–AUTO–08/06ATA6832Table 3-2. Output Data ProtocolBitOutput (Status) Register Function0 TP Temperature prewarning: high = warning 1 Status LS1Nor

Page 13

64951A–AUTO–08/06ATA6832After power-on reset, the input register has the following status:The following patterns are used to enable internal test mode

Page 14 - 10. Application Circuit

74951A–AUTO–08/06ATA68323.4 Overtemperature ProtectionIf the junction temperature of one or more output stages exceeds the thermal prewarning thresh-o

Page 15 - 11. Ordering Information

84951A–AUTO–08/06ATA68324. Absolute Maximum RatingsStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the dev

Page 16 - Regional Headquarters

94951A–AUTO–08/06ATA68327. Noise and Surge ImmunityParameters Test Conditions ValueConducted interferences ISO 7637-1 Level 4(1)Interference suppressi

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Summary of Contents

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