MC33879APEK Freescale Semiconductor, MC33879APEK Datasheet

MC33879APEK

Manufacturer Part Number

MC33879APEK

Description

CONFIG OCTAL SERIAL SW

Manufacturer

Freescale Semiconductor

Datasheets

1.MC33879APEK.pdf (23 pages)

2.MC33879APEK.pdf (23 pages)

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Freescale Semiconductor

Technical Data

Freescale Semiconductor, Inc. reserves the right to change the detail specifications,

as may be required, to permit improvements in the design of its products.

Configurable Octal Serial Switch

with Open Load Detect Current

Disable

interface (SPI). Two of the outputs may be controlled directly via a

microcontroller for pulse-width modulation (PWM) applications. The

33879 incorporates SMARTMOS technology, with CMOS logic,

bipolar/MOS analog circuitry, and DMOS power MOSFETs. The 33879

controls various inductive, incandescent, or LED loads by directly

interfacing with a microcontroller. The circuit’s innovative monitoring

and protection features include very low standby currents, cascade

fault reporting, internal + 45 V clamp voltage for low side configuration,

- 20 V high side configuration, output specific diagnostics, and

independent over-temperature protection.

Features

low side switch with 16-bit serial input control using the serial peripheral

The 33879 device is an 8-output hardware configurable, high side /

• Designed to operate 5.5 V < V

• 16-bit SPI for control and fault reporting, 3.3 V / 5.0 V compatible

• Outputs are current limited (0.6 A to 1.2 A) to drive incandescent

• Output voltage clamp, + 45 V (low side) and - 20 V (high side)

• On/Off control of open load detect current (LED application)

• Internal reverse battery protection on V

• Loss of ground or supply will not energize loads or damage IC

• Maximum 5.0 μA I

• R

• Short-circuit detect and current limit with automatic retry

• Independent over-temperature protection

lamps

during inductive switching

DS(ON)

of 0.75 Ω at 25 °C typical

PWR

standby current at 13 V V

MCU

5.0 V

PWM1

PWM2

SCLK

MOSI

MISO

PWR

Figure 1. 33879 Simplified Application Diagram

< 26.5 V

PWR

VDD

SCLK

IN5

IN6

GND

VPWR

PWR

33879

BAT

(For Tape and Reel,

MC33879APEK

MC33879TEK

add an R2 Suffix)

High Side Drive

H-Bridge Configuration

Low Side Drive

Device

BAT

HIGH SIDE/ LOW SIDE SWITCH

ORDERING INFORMATION

BAT

EK SUFFIX (PB-FREE)

33879A

33879

Document Number: MC33879

32-PIN SOICW

98ARL10543D

-40

Temperature

Range (T

C to 125

)

Rev. 9.0, 5/2012

32 SOICW-EP

Package

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