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Motorola Electronic Components Datasheet

MC33486 Datasheet

Dual High Side Switch

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MC33486 pdf
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Freescale Semiconductor, Inc.
Order Number: MC33486/D
Rev. 3.3, 06/2001
Semiconductor Technical Data
Advance Information
Dual High Side Switch for H-Bridge
Automotive Applications
This device is a dual high side switch for automotive applications which
incorporates a dual low side switch control feature. This device is designed to
monitor two low side switches for typical DC-motor control in an H-Bridge
configuration. It can be directly interfaced with a microcontroller for control and
diagnostic functions, is PWM capable and has a self-adjusted switching speed for
minimizing electromagnetic emission.
The High Side block incorporates two 15mRdson N-Channel power Mosfets
with senses and a control circuitry. Each output of this high side block is protected
against short to gnd and load shorts, and has over temperature detection with
hysteresis. It includes a current recopy feature for monitoring the load current. The
control circuitry also has an overvoltage detector which turns off the bridge and
protects the load in case of Vbat exceeding 28V.
The low side control block is able to drive 2 low sides switches in a H-bridge
configuration and protects them in case of short circuit. This, in combination with
the High side protection, fully protects the H-bridge from shorted loads, shorts to
Vbat and shorts to GND.
This device offers a very low quiescent current in standby mode.
•10 Amps Nominal DC Current
•35 Amps Maximum Peak Current
•DC Voltage from -0.3V to 40V
•Operating Voltage from 8 to 28V
•Overvoltage Detection : Switch Off when Vbat Exceed 28V
•High Side and Low Side Overcurrent protection
•Operating Junction Temperature - 40°C to 150°C
•Rdson 15mmax at 25C° per Mosfet
•DC to 30kHz PWM Capability
•Standby Mode with Low Standby Current
•Junction to Case Thermal Resistance : 2°C/W
•ESD protection 2kV
•Current Recopy to Monitor the High-Side Current
•Common diagnostic output
MC33486
DUAL HIGH SIDE SWITCH
FOR H-BRIDGE AUTOMO-
TIVE APPLICATIONS
SEMICONDUCTOR
TECHNICAL DATA
DH SUFFIX
HSOP20 Package
CASE 979-04
D2PAK
D2PAK
PIN ASSIGNMENT
Gnd 1
Cur R 2
IN1 3
GLS1 4
OUT1 5
OUT1 6
OUT1 7
OUT1 8
NC 9
NC 10
Vbat
21
21
Vbat
20 Wake
19 St
18 IN2
17 GLS2
16 OUT2
15 OUT2
14 OUT2
13 OUT2
12 NC
11 NC
5V 5V
MCU
I/O
Simplified Block Diagram and Typical Application
High Side Block
St
IN1
IN2
WAKE
Cur R
Control
GND
GLS1 OUT1
VBAT
GLS2 OUT2
GND
M
GND
Low Side Block
This document contains information on a new product. Specifications and
information herein are subject to change withoutFnooticre.More Information On This Product,
© Motorola, Inc., 2001. All rights reserved.
Go to: www.freescale.com
TM


Motorola Electronic Components Datasheet

MC33486 Datasheet

Dual High Side Switch

No Preview Available !

MC33486 pdf
Pin No.
TAB
5,6,7,8
13,14,15,16
3
18
19
4
17
20
2
9, 10, 11, 12,
1
Freescale SMeCm33i4c8o6 nductor, Inc.
PINS FUNCTION DESCRIPTION
Name/Function
Vbat
Supply Voltage
OUT1
OUTPUT Channel 1
OUT 2
OUTPUT Channel 2
IN 1
INPUT Channel 1
IN 2
INPUT Channel 2
St
Status for both
Channels
GLS1
GLS2
Wake
Cur R
Load Current Sense
NC
Not Connected
GND
GROUND
Description
The backside TAB is connected to the power supply of the
MC33486DH. In addition to its supply function, the tab contributes to
the thermal behaviour of the device by conducting the heat from the
switching MOSFET to the printed circuit board.
Pins 5, 6,7,8 are the source of the output1 15mOhm High-side
MOSFET1. Pins 13,14,15 are source of the output 2 15mOhm High-side
MOSFET2. They are respectively controlled via the IN1 and IN2 pins.
These outputs are current limited and thermally protected
These are the device input pins which directly control their associated
outputs. The levels are CMOS compatible. When the input is a logic
low, the associated output is low (High Side OFF and Low Side ON).
Each input pin has an internal active pull down, so that it will not float
if disconnected.
The Status output is an open drain indication that goes active low
when a fault mode (Short to gnd/Vbat, Overtemp) is detected by the
device on either one channel or both simultaneously. Its internal
structure is an open drain architecture with an internal clamp at 6V.
An external pull up resistor connected to Vdd (5V) is needed. See
Functional Truth Table.
These pins have to be connected to the gate of each Low Side. When the
input (INx) is logic High, the associated GLS is grounded to turn off the
external FET .
This pin is a digital input . When Wake is a logic low, the devices bias current
draw is at a minimum. If Wake is a logic high, the part is operationnal. Wake
pin has a pull down resistor.
The Current Sense pin deliver a ratioed amount (1/3700) of the sum
of the High Side currents that can be used to generate signal ground
referenced output voltages for use by the microcontroller.
These pins are not used.
This is the Ground pin of the device.
For More Information On This Product,
Dual High Side SwGitochtofo: rwHw-Bwri.dfrgeeeAsuctaolmeo.ctiovme Applications
2


Part Number MC33486
Description Dual High Side Switch
Maker Motorola
Total Page 9 Pages
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