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부품번호 | MC34923 기능 |
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기능 | Full-Bridge PWM Motor Driver | ||
제조업체 | Motorola Semiconductors | ||
로고 | |||
전체 16 페이지수
www.DataSheet4U.com
Freescale Semiconductor, Inc.
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order this document from Analog Marketing: MC34923/D
Rev 0, 05/2003
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.
MAXIMUM RATINGS
All voltages are with respect to ground unless otherwise noted.
Rating
Symbol
Value
Unit
Load Supply Voltage
VBB 48 V
Logic Supply Voltage
VDD
7.0 V
Input Voltage
VIN
-0.3 to VDD + 0.3
V
Sense Voltage
VS 0.5 V
Reference Voltage
VREF
2.7 V
Output Current (Note 1)
IOUT
±2.0 A
Storage Temperature
TS
-55 to 150
°C
Ambient Temperature
TA
-20 to 85
°C
Operating Junction Temperature
TJ
-40 to 150
°C
Power Dissipation (TA = 25°C) (Note 2)
PD
1.6 (Note 3)
W
ESD Voltage
Human Body Model (Note 4)
Machine Model (Note 5)
VESD1
VESD2
±2000
±200
V
Lead Soldering Temperature (Note 6)
TSOLDER 260 °C
Thermal Resistance Junction-to-Ambient (Note 2)
RθJA
56 °C/W
Notes
1. Output current rating may be limited by duty cycle, ambient temperature, and heatsinking. Under any set of conditions, do not exceed the
specified current rating or a junction temperature of 150°C.
2. Maximum power dissipation at indicated ambient temperature in free air with no heatsink used.
3. Per SEMI G42-88 specification.
4. ESD1 testing is performed in accordance with the Human Body Model (CZAP = 100 pF, RZAP = 1500 Ω).
5. ESD2 testing is performed in accordance with the Machine Model (CZAP = 200 pF, RZAP = 0 Ω).
6. Lead soldering temperature limit is for 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may
cause malfunction or permanent damage to the device.
34923
4
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
For More Information On This Product,
Go to: www.freescale.com
4페이지 Freescale Semiconductor, Inc.
DYNAMIC 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
CONTROL LOGIC
OSC Input Frequency (Operating)
fOSC 2.9 – 6.1 MHz
OSC Input Duty Cycle (Operating)
dc OSC
40
–
60 %
Propagation Delay Times
PWM Change to Source ON
PWM Change to Source OFF
PWM Change to Sink ON
PWM Change to Sink OFF
Direction Change to Sink ON
Direction Change to Sink OFF
Direction Change to Source ON
Direction Change to Source OFF
tpd ns
– 600 –
– 100 –
– 600 –
– 100 –
– 600 –
– 100 –
– 600 –
– 100 –
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
For More Information On This Product,
Go to: www.freescale.com
34923
7
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