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PDF MC34921 Data sheet ( Hoja de datos )
| Número de pieza | MC34921 | |
| Descripción | Configurable Motor Driver IC | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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Freescale Semiconductor
Technical Data
Configurable Motor Driver IC
with Power Supplies
MC34921
Rev 4.0, 06/2005
34921
The 34921 power IC integrates multiple motor drivers, multiple
power regulators, and most other analog functions a small consumer
motion-enabled product needs. The 34921’s circuitry is fully protected
with current limiting, short-circuit shutdown, over-temperature, over-
voltage, and under-voltage detection. Supervisory functions can be
read and programmed through a 8-MHz Serial Interface.
A 5.0 V dual-mode (linear or switching) voltage regulator, 3.3 V
switching buck regulator, and a voltage-selectable (1.5 V, 1.8 V, 2.5 V)
linear regulator provide power management. Two H-Bridges and a
configurable motor driver are provided for controlling two dc motors
and one unipolar stepper motor.
The highly integrated 34921 brings together sensing,
communication, power management, system protection, and motor
control in one device.
Features
• Two Functionally Identical Pulse-Width Modulated (PWM) DC Motor
Drivers
• One Switching, One Linear, and One Dual-Mode Regulator
• Dual Mode Switching/Linear 5.0 V Regulator
• Supervisory Functions (Power-ON Reset and Error Reset Circuitry)
• 8-Channel, 8-Bit Analog-to-Digital Converter (ADC)
• Charge Pump for High-Side MOSFET Drive
• Complete Support for Analog Quadrature Encoder
• Pb Free package is designated by suffix AE
MOTOR DRIVERS & POWER SUPPLIES
AE SUFFIX (Pb FREE)
98ARH98426A
64-LEAD LQFP-EP
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC34921AE/R2
0°C to 70°C
64 LQFP-EP
5.0 V / 3.3 V
B+
34921
Serial MISO
MCU MOSI
SCLK
Ports CE
A/D
AN0
B+
GATEOUT
5.0 V
3.3 V
VCORE
High-Side
MOSFET
ADCMA
A
B+
AN3
Inputs
B+ SA/CDCMA
APWM
B SB/LSOUT1 ADCMB
Step
Motor
C
B
A
CPWMA
CPWMB
SB/LSOUT2
SA/CDCMB
DGND
BDCMA
BPWM
BDCMB
GND
DC
Motor
A
DC
Motor
B
Figure 1. 34921 Simplified Application Diagram
*This document contains information on a product under development.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2005. All rights reserved.
1 page  
TERMINAL CONNECTIONS
Table 1. Terminal Function Description (continued)
A functional description of each terminal can be found in the Functional Terminal Description section beginning on page 18
Terminal
Terminal Name
Formal Name
Definition
54
CE
Chip Enable
Serial data strobe.
55 CPWMA/CDCPWM Motor Driver C PWM Step motor driver Phase A PWM or DC motor driver PWM.
Input A
56
DGND
Digital Ground
Digital ground.
58
CPWMB
Motor Driver C PWM Step motor driver Phase B PWM.
Input B
59
APWM
Motor Driver A PWM PWM input for DC motor driver A.
Input
60
BPWM
Motor Driver B PWM PWM input for DC motor driver B.
Input
61
CDCMB / HSOUT2
Motor Driver C DC Step motor driver C output or high-side output 2.
Motor Output or High-
Side Output 2
63
CDCMA / HSOUT1
Motor Driver C DC Step motor driver C output or high-side output 1.
Motor Output or High-
Side Output 1
Analog Integrated Circuit Device Data
Freescale Semiconductor
34921
5
5 Page 
STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static Electrical Characteristics (continued)
Characteristics noted under conditions 16 V ≤ B+ ≤ 34 V, 0°C ≤ TA ≤ 70°C, and 0°C ≤ TJ ≤ 100°C unless otherwise noted.
Typical values noted reflect the approximate parameter means at TA = 25°C under nominal conditions unless otherwise noted.
Characteristic
Symbol Min Typ Max Unit
Supervisor Circuitry
Minimum Function B+ for Charge Pump, Oscillator Up
Reset/Fault Registers Valid (10)
B+ V
9.0 –
–
Minimum Function V5.0 for RST Operational
RST VOL ≤ 0.05 V @ 1.0 mA (10)
Minimum Function V3.3 for RST Operational
RST VOL ≤ 0.05 V @ 1.0 mA (10)
RST Low Voltage (11)
IRST ≤ 5.0 mA
RST V5.0 Threshold
V5.0 Rising
V5.0 Falling
RST Hysteresis for V5.0
RST V3.3 Threshold
V3.3 Rising
V3.3 Falling
RST Hysteresis for V3.3
RST VCORE Threshold
VCORE Falling
RST Hysteresis for VCORE
Overtemperature Junction Temperature(12)
TJ Rising
Overtemperature Hysteresis(12)
TJ Falling
Thermal Warning (12)
B+ Undervoltage Threshold to Assert RST
V5.0 = +5.0 V, B+ Falling
B+ Undervoltage Threshold Hysteresis(13)
Minimum B+ Necessary to Clear B+ Fault
V5.0 = +5.0 V, B+ Rising
V5.0 RST
V3.3 RST
VOL
2.0
2.0
–
V5.0 t+
V5.0 t–
VHYSV5.0
–
4.5
10
V3.3 t+
V3.3 t–
VHYS_3.3
–
2.8
10
VCORE
VHYS CORE
TJ (OVER)
TJ (HYS)
TW
B+(FAULT)
B+FAULT (HYS)
B+ RECOVERY
85
–
140
10
TJ -30
12
1.0
–
–
–
0.1
4.65
4.6
50
2.9
2.9
15
86
10
–
–
–
12.75
1.5
–
–
–
0.25
4.75
4.70
–
3.15
3.0
–
90
–
–
30
TJ -20
13.5
2.0
15.25
V
V
V
V
mV
V
mV
% VCORE_
NOM
mV
°C
°C
°C
V
V
V
Notes
10. If any of these conditions for this not is true, then RST is activated until all operating conditions are met.
11. The RST terminal uses an external pull-up, which may be to 5.0 V or 3.3 V.
12. Guaranteed by design.
13. Alternately, the minimum B+ fault threshold voltage must not be lower than 12 V, and the B+ fault clear voltage must not be higher than
15.25 V. The hysteresis may be greater than 2.0 V if this requirement is met.
Analog Integrated Circuit Device Data
Freescale Semiconductor
34921
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MC34921.PDF ] | |
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