Rainbow-electronics ATA6837 Manual de usuario descargar pdf

Features

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

• Capable of Switching all Kinds of Loads (Such as DC Motors, Bulbs, Resistors,

Capacitors and Inductors)

• R

DSon

Typically 1.0Ω at 25°C, Maximum 2.2Ω at 200°C

• Up to 650-mA Output Current

• Very Low Quiescent Current I

< 20 µA in Standby Mode

• Outputs Short-circuit Protected

• Overtemperature Prewarning and Protection

• Undervoltage Protection

• Various Diagnosis Functions Such as Shorted Output, Open Load, Overtemperature

and Power Supply Fail

• Serial Data Interface

• Operation Voltage up to 40V

• Daisy Chaining Possible

• Serial Interface 5V and 3.3V Compatible, up to 2 MHz Clock Frequency

• QFN24 Package

1. Description

The ATA6837 is designed for high-temperature applications. In mechatronic solutions,

for example, turbo charger or exhaust gas recirculation systems, many flaps have to

be controlled by DC motor driver ICs which are located very close to the hot engine or

actuator and where ambient temperatures up to 150°C are usual. Due to the advan-

tages 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 ATA6837 is a fully protected hex half-bridge driver, used to control up to 6 differ-

ent loads by a microcontroller in automotive and industrial applications.

Each of the six high-side and six low-side drivers is capable of driving currents up to

650 mA. The drivers are internally connected to form 6 half-bridges and can be con-

trolled separately from a standard serial data interface. Therefore, all kinds of loads,

such as bulbs, resistors, capacitors and inductors, can be combined. The IC espe-

cially supports the application of H-bridges to drive DC motors.

Protection is guaranteed in terms of short-circuit conditions, overtemperature and

undervoltage. Various diagnosis functions and a very low quiescent current in standby

mode make a wide range of applications possible.

Automotive qualification referring to conducted interferences, EMC protection and

ESD protection gives added value and enhanced quality for the exacting requirements

of automotive applications.

High

Temperature

Hex Half-bridge

Driver with

Serial Input

Control

ATA6837

Preliminary

4953C–AUTO–09/07

1 2 3 4 5 6 ... 16 17

Indice de contenidos

Pagina 1 - 1. Description

Features• Six Half-bridge Outputs Formed by Six High-side and Six Low-side Drivers• Capable of Switching all Kinds of Loads (Such as DC Motors, Bulbs,

Pagina 2

104953C–AUTO–09/07ATA6837 [Preliminary] 4.8Ratio thermal shutdown/thermal prewarningTj switch on/ TjPW reset1.05 1.2 A5 Output Specification (LS1-LS6,

Pagina 3

114953C–AUTO–09/07ATA6837 [Preliminary]6 Inhibit Input6.1Input voltage low-level thresholdVIL0.3 ×VVCCVA6.2Input voltage high-level thresholdVIH0.7 ×V

Pagina 4

124953C–AUTO–09/07ATA6837 [Preliminary] 8. Serial Interface: TimingParameters Test Conditions Timing Chart No. Symbol Min. Typ. Max. UnitDO enable aft

Pagina 5

134953C–AUTO–09/07ATA6837 [Preliminary]Figure 8-1. Serial Interface Timing Diagram with Chart Numbers 1DOCSCLKCSDOCLKOutput DO: High level = 0.8 × VCC

Pagina 6

144953C–AUTO–09/07ATA6837 [Preliminary] 10. Application CircuitFigure 10-1. Application Circuit 9. Noise and Surge ImmunityParameters Test Conditions

Pagina 7

154953C–AUTO–09/07ATA6837 [Preliminary]10.1 Application Notes• Connect the blocking capacitors at VCC and VS as close as possible to the power supply

Pagina 8

164953C–AUTO–09/07ATA6837 [Preliminary] 12. Package Information 13. Revision History11. Ordering InformationExtended Type Number Package RemarksATA683

Pagina 9

4953C–AUTO–09/07Headquarters InternationalAtmel Corporation2325 Orchard ParkwaySan Jose, CA 95131USATel: 1(408) 441-0311Fax: 1(408) 487-2600Atmel Asia

Pagina 10 - ATA6837 [Preliminary]

24953C–AUTO–09/07ATA6837 [Preliminary] Figure 1-1. Block Diagram QFN24 SIHS2LS2HS1LS1Controllogic18CLK13DOINH17CS19DIInput registerOuput registerSeria

Pagina 11

34953C–AUTO–09/07ATA6837 [Preliminary]2. Pin ConfigurationFigure 2-1. Pinning QFN 24, 5 × 5, 0.65 mm pitch Note: YWW Date code (Y = Year above 2000, W

Pagina 12

44953C–AUTO–09/07ATA6837 [Preliminary] 17 CSChip select input; 5V/3.3V CMOS logic level input with internal pull up; low = serial communication is ena

Pagina 13

54953C–AUTO–09/07ATA6837 [Preliminary]3. Functional Description3.1 Serial InterfaceData transfer starts with the falling edge of the CS signal. Data m

Pagina 14

64953C–AUTO–09/07ATA6837 [Preliminary] Table 3-2. Output Data ProtocolBitOutput (Status) Register Function0TPTemperature prewarning: high = warning (o

Pagina 15

74953C–AUTO–09/07ATA6837 [Preliminary]3.2 Power-supply FailIn case of undervoltage at pin VS, an internal timer is started. When during a permanent un

Pagina 16

84953C–AUTO–09/07ATA6837 [Preliminary] 5. Thermal Resistance4. Absolute Maximum RatingsStresses beyond those listed under “Absolute Maximum Ratings” m

Pagina 17 - Product Contact

94953C–AUTO–09/07ATA6837 [Preliminary]7. Electrical Characteristics7.5V < VS < 40V; 3V < VCC < 5.5V; INH = High; –40°C < Tj < 200°C,

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