MC33198

© Motorola,Inc 1999

Rev 1.1

Automotive High Side

TMOS Driver

MOTOROLA

SEMICONDUCTOR

HIGH SIDE

TMOS DRIVER

PIN ASSIGNMENT

SRC

DRN

GND

GATE

1

2

3

5

4

6

7

8

TIMER

INPUT

STATUS

VCC

SILICON MONOLITHIC

INTEGRATED CIRCUIT

ORDERING INFORMATION

Device

Temperature

Range

Package

SO8

- 40

°C to+125°C

MC33198D

Block Diagram and Typical Application

LOGIC

Over

Detect

Volt

Under

Volt

Detect

Bias

Supply

Charge

Pump

Power

ON

Vcc

10

µA

80

µA

Ref

10

µA

100

µA

+

-

+

-

+

-

DRN

GATE

SRC

GND

TIMER

INPUT

STATUS

VCC

15V

VBAT

POWER

TMOS

LOAD

Rsrc

Rdrn

C

timer

5V

MCU

C2

C1

C3

Rpu

The MC33198D is a high side TMOS driver, dedicated for automotive appli-

cations. It is used in conjunction with an external power MOSFET for high

side drive applications. The device can drive and protect a large variety of

MOSFET. The device has CMOS compatible input control, charge pump to

drive the MOSFET gate, fault detection circuitry based on programmable

Vds monitoring to detect shorted load. It also includes a programmable timer

function to eliminate undesired switch off due to in rush currents and a status

pin which reports the output status in both on and off MOSFET state.

The device uses few external components and offers an economical solution

to large current high side switch. It also has PWM capability up to 1kHz.

•Designed for Automotive High Side Driver Application

•Works with a Wide Variety of N-Channel Power MOSFETs

•PWM Capability

•On Board Charge Pump Capable of Charging 25nF in less than 1ms

with No External Components Required

•Drive Inductive Load with No External Clamp Circuitry Required

•CMOS Logic Compatible Input Control

•TMOS Over Current and Short Circuit Protection

•Fault Output to Report an Over MOSFET Current Condition

•Output Status Available when MOSFET is On or Off

•Extended Temperature Range from -40

°C to 125°C

•Protected Against Automotive Transients with few External

Components

•Over Voltage and Under Voltage Shutdown

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com