Freescale Semiconductor
Advance Information
Document Number: 33937
Rev. 6.0, 9/2009
Three Phase Field Effect
Transistor Pre-driver
The 33937 and 33937A are Field Effect Transistor (FET) pre-
drivers designed for three phase motor control and similar
applications. The 33937A has been specifically enhanced to
improve performance when driving very high current loads. The
integrated circuit (IC) uses
SMARTMOS
™
technology.
The IC contains three High Side FET pre-drivers and three Low
Side FET pre-drivers.Three external bootstrap capacitors provide
gate charge to the High Side FETs.
The IC interfaces to a MCU via six direct input control signals,
an SPI port for device setup and asynchronous reset, enable and
interrupt signals. Both 5.0 and 3.0 V logic level inputs are
accepted and 5.0 V logic level outputs are provided.
Features
• Fully specified from 8.0 to 40 V covers 12 and 24 V automotive
systems
• Extended operating range from 6.0 to 58 V covers 12 and 42 V
systems
• Greater than 1.0 A gate drive capability with protection
• Protection against reverse charge injection from CGD and CGS
of external FETs
• Includes a charge pump to support full FET drive at low battery
voltages
• Deadtime is programmable via the SPI port
• Simultaneous output capability enabled via safe SPI command
• Pb-free packaging designated by suffix code EK
V
SYS
VPUMP
PUMP
VPWR
VLS
VDD
VSS
3
3
3
33937
33937A
THREE-PHASE PRE-DRIVER
EK SUFFIX (Pb-FREE)
98ASA99334D
54-PIN SOICW-EP
ORDERING INFORMATION
Device
MCZ33937EK/R2
MCZ33937AEK/R2
Temperature
Range (T
A
)
-40
°
C to 135
°
C
Package
54 SOICW-EP
33937
VSUP
PA_HS_G
PB_HS_G
PC_HS_G
PA_HS_S
PB_HS_S
PC_HS_S
MCU
OR
DSP
PX_HS
PX_LS
PHASEX
CS
SI
SCLK
SO
RST
INT
EN1
GND
EN2
PA_LS_G
PB_LS_G
PC_LS_G
PX_LS_S
AMP_P
AMP_N
AMP_OUT
R
SEN
Figure 1. 33937 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., 2008-2009. All rights reserved.
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
