34921 IC Datasheet

34921 Datasheet, PDF, Equivalent


Part Number

34921

Description

Configurable Motor Driver IC

Manufacture

Freescale Semiconductor

Total Page 30 Pages
Datasheet
Download 34921 Datasheet


34921
www.DFarteaeSshceeatl4eUS.ceommiconductor
Technical Data
Configurable Motor Driver IC
with Power Supplies
MC34921
Rev 5.0, 07/2005
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
H-BRIDGE MOTOR DRIVER
AND POWER SUPPLY
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
AN3
Inputs
A
B+
APWM
B+ SA/CDCMA
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.

34921
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
B+
CP1 CP2
VBOOST
5 V SELECT
5 V SWITCH
5 V SUPPLY
5V
3.3 V SWITCH
3.3 V
VCORE SUPPLY
VCORE
VCORE SELECT
ENC_FILTB
ENC_FILTA
5.0 V
Dual Mode
Regulator
B+
3.3 V Switching
Regulator
VCORE
Linear
Regulator
I/V
Converter
Charge Pump
Gate Voltage
Generator
Thermal
Shutdown
B+
Oscillator
Motor Driver B
B+
BPWM
BDCMA
BDCMB
APWM
ADCMA
AN3/ANALOGIN_B
AN2/ANALOGIN_A
AN1/ANALOGOUT_B
AN0/ANALOGOUT_A
MISO
MOSI
SCLK
CE
GATEOUT
A /D
Converter
and
Multiplexer
Motor Driver A
Serial I/O
Gate Driver
Active Clamp
Step
Motor Driver
SS DC Motor Driver
RST
Supervisor
Circuitry
DGND
GND
Figure 2. 34921 Simplified Internal Block Diagram
ADCMB
SA /CDCMA
SA /CDCMB
SB/LSOUT1
SB/LSOUT2
CPWMA /CDCPWM
CPWMB
CDCMA /HSOUT1
CDCMB /HSOUT2
34921
2
Analog Integrated Circuit Device Data
Freescale Semiconductor


Features www.DataSheet4U.com Freescale Semiconduc tor Technical Data MC34921 Rev 5.0, 0 7/2005 Configurable Motor Driver IC wi th Power Supplies The 34921 power IC in tegrates multiple motor drivers, multip le power regulators, and most other ana log functions a small consumer motion-e nabled product needs. The 34921’s cir cuitry is fully protected with current limiting, short-circuit shutdown, over- temperature, overvoltage, and under-vol tage detection. Supervisory functions c an be read and programmed through a 8-M Hz 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 manag ement. Two H-Bridges and a configurable motor driver are provided for controll ing two dc motors and one unipolar step per motor. The highly integrated 34921 brings together sensing, communication, power management, system protection, a nd motor control in one device. Features • Two Functionally Ident.
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