34923 Datasheet PDF - Freescale Semiconductor
Part Number | 34923 | |
Description | Full-Bridge PWM Motor Driver | |
Manufacturers | Freescale Semiconductor | |
Logo | ||
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Freescale Semiconductor, Inc.
MOTOROLA
Order this document from Analog Marketing: MC34923/D
Rev 0, 05/2003
SEMICONDUCTOR TECHNICAL DATA
Preliminary Information
Full-Bridge PWM Motor Driver
Designed with Motorola’s advanced SMARTMOS, the 34923 is designed for
pulse-width modulated (PWM) current control of DC motors. It is capable of
continuous output currents up to 2.0 A and operating voltages of up to 45 V.
Internal fixed off-time PWM current-control timing circuitry can be programmed
via a serial interface to operate in slow, fast, and mixed current-decay modes.
DIR and PWM/ENABLE input pins are provided for use in controlling the
speed and direction of a DC motor with externally applied PWM-control
signals. The PWM/ENABLE input can be programmed via the serial port to
PWM the bridge in fast or slow current decay. Internal synchronous
rectification control circuitry is provided to reduce power dissipation during
PWM operation.
Internal circuit protection includes thermal shutdown with hysteresis and
crossover-current protection. A special power-up sequencing is not required.
34923
FULL-BRIDGE PWM MOTOR
DRIVER
Features
• ±2.0 A, 45 V Continuous Output Rating
• Low RDS(ON) Outputs (270 mΩ, typical)
• Programmable Mixed, Fast, and Slow Current-Decay Modes
• Serial Interface Controls Chip Functions
• Synchronous Rectification for Low Power Dissipation
• Internal Undervoltage Lockout Thermal Shutdown Circuitry
• Crossover-Current Protection
DW SUFFIX
24-LEAD SOICW
CASE 751E-04
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC34923DW/R2 -40 to 125°C
24 SOICW
34923 Simplified Application Diagram
5.0 V
≤ 5.0 V
34923
MCU
Serial
Port
PWMMODE
DIR DCMA
PWM/ENABLE
CLOCK
DATA
STROBE
OSC
DCMB
GND
DC
Motor
This document contains information on a product under development.
Motorola reserves the right to change or discontinue this product without notice.
© Motorola, Inc. 2003
For More Information On This Product,
Go to: www.freescale.com
|
|
Freescale Semiconductor, Inc.
STATIC ELECTRICAL CHARACTERISTICS
Characteristics noted under conditions TA = 25°C, VBB = 45 V, VDD = 5.0 V, VSENSE = 0.5 V, and fPWM < 50 kHz unless otherwise
noted.
Characteristic
Symbol Min Typ Max Unit
OUTPUT DRIVERS
Load Supply Voltage Range
Operating
During Sleep Mode
VBB V
20 – 45
0 – 45
Output Leakage Current
VOUT = VBB
VOUT = 0 V
IDSS
µA
–
<1.0
20
–
<-1.0
-20
Output On Resistance
Source Driver, IOUT = -2.0 A @ 25°C
Source Driver, IOUT = -2.0 A @ 150°C
Sink Driver, IOUT = 2.0 A @ 25°C
Sink Driver, IOUT = 2.0 A @ 150°C
RDS (ON)
–
–
–
–
mΩ
300 450
– 700
300 450
– 700
Body Diode Forward Voltage
Source Diode, IF = -2.0 A
Sink Diode, IF = 2.0 A
VF V
– 1.2 1.6
– 1.2 1.6
Load Supply Current
fPWM < 50 kHz
Charge Pump On, Outputs Disabled
Sleep Mode
IBB
– 4.0 7.0 mA
– 2.0 5.0 mA
– – 20 µA
CONTROL LOGIC
Logic Supply Voltage Range (Operating)
VDD
4.5 5.0 5.5 V
Logic Input Voltage
V
VIN(1)
2.0
–
–
VIN(0)
–
– 0.8
Input Current
All Logic Inputs Except PWM/ENABLE
VIN = 2.0 V
VIN = 0.8 V
PWM/ENABLE Only
VIN = 2.0 V
VIN = 0.8 V
IIN(1)
IIN(0)
IIN(1)
IIN(0)
µA
–
<1.0
20
–
<-2.0
-20
– 40 100
– 16 40
Input Hysteresis
All Digital Inputs Except OSC
OSC (Operating)
mV
∆VIN(LOGIC)
50
– 100
∆VIN(OSC)
200
–
400
Reference Input Voltage Range (Operating)
VREF 0 – 2.6 V
Reference Input Current
VREF = 2.5 V
IREF
µA
– – ±0.5
Input Offset Voltage
Comparator VREF = 0 V
Buffer
VIO mV
– 0 ±5.0
– 0 ±15
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
For More Information On This Product,
Go to: www.freescale.com
34923
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Information | Total 16 Pages | |
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