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Freescale Semiconductor Electronic Components Datasheet



MC33285

Dual High-Side TMOS Driver


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MC33285 pdf
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Advance Information
Document Number: MC33285
Rev. 5.0, 2/2007
Dual High-Side TMOS Driver
A single input controls the 33285 in driving two external high-side N-
Channel TMOS power FETs controlling incandescent or inductive
loads. Pulse Width Modulated (PWM) input control to 1.0 kHz is
possible. The 33285 contains a common internal charge pump used to
enhance the Gate voltage of both FETs.
An external charge capacitor provides access to the charge pump
output. Both external FETs are protected against inductive load
transients by separate internal source-to-gate dynamic clamps. The
power FETs are protected by the 33285 with short-circuit delay time of
800 µs. The device is designed to withstand reverse polarity battery
and load dump transients, encountered in automotive applications.
33285
HIGH-SIDE TMOS DRIVER
Features
• PWM Capability
• Power TMOS Number One (OUT1) Short-Circuit Detection and
Short-Circuit Protection
• Voltage Range 7.0 V 40 V
• Extended Temperature Range from -40°C 125°C
• Load Dump Protected
• Overvoltage Detection and Activation of OUT2 During
Overvoltage
• Single Input Control for Both Output Stages
• Capacitor Value of 100 nF Connected to Pin CP
• Analog Input Control Measurement Detection
• OUT1 LOAD Leakage Measurement Detection
• Pb-Free Packaging Designated by Suffix Code EF
D SUFFIX
EF SUFFIX (PB-FREE)
98ASB42564B
8-PIN SOICN
ORDERING INFORMATION
Device
MC33285D/R2
MCZ33285EF/R2
Temperature
Range (TA)
-40°C to 125°C
Package
8 SOICN
VCC
Input Control
33285
VCC DRN
CP
OUT2
IN OUT1
GND SRC
VPWR
Motor
Figure 1. 33285 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007. All rights reserved.



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MC33285 pdf
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
VIGN
VCC
CCP
CP
Kl.30
VREF
+
R
S
- tLDDET
Load Dump
Detection
Oscillator
and
Divider
IN
THRIN2
tOUT2ECT R Q
OUT2 Activation
+ Time
S
-
Charge
Pump
ION2
IOUTN2
GND
THRIN1
+
- RQ
S
OC Detection
tOCDET
Start tOCDET
Bandgap
Rthr
ION1
VOUT2-VDRN> VTH2
VOUT1-VSRC> VTH1
IOUTN1 +
-
SCPC
DRN
OUT2
OUT1
SRC
M
Figure 2. 33285 Simplified Internal Block and Typical Applications Diagram
33285
2
Analog Integrated Circuit Device Data
Freescale Semiconductor



Part Number MC33285
Description Dual High-Side TMOS Driver
Maker Freescale Semiconductor - Freescale Semiconductor
Total Page 13 Pages
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