MC34921AE Freescale Semiconductor, MC34921AE Datasheet

IC MOTOR DRVR PWM DC DUAL 64LQFP

MC34921AE

Manufacturer Part Number
MC34921AE
Description
IC MOTOR DRVR PWM DC DUAL 64LQFP
Manufacturer
Freescale Semiconductor
Type
Half Bridge DC Motor Driverr
Datasheet

Specifications of MC34921AE

Applications
DC Motor Driver, Stepper Motor Driver, H Bridge
Number Of Outputs
2
Current - Output
±4.5A
Voltage - Load
0 V ~ 38 V
Voltage - Supply
4.8 V ~ 5.2 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
64-LQFP Exposed Pad, 64-eLQFP, 64-HLQFP
Operating Supply Voltage
5 V
Mounting Style
SMD/SMT
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

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Freescale Semiconductor
Technical Data
Configurable Motor Driver IC
with Power Supplies
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.
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.
communication, power management, system protection, and motor
control in one device.
Features
• Two Functionally Identical Pulse-Width Modulated (PWM) DC Motor
• 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
*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.
The 34921 power IC integrates multiple motor drivers, multiple
A 5.0 V dual-mode (linear or switching) voltage regulator, 3.3 V
The highly integrated 34921 brings together sensing,
Drivers
Motor
Step
Figure 1. 34921 Simplified Application Diagram
C
B+
5.0 V / 3.3 V
MCU
A
A
B
B
Serial
Inputs
Ports
A/D
B+
MISO
MOSI
SCLK
CE
AN0
AN3
SA/CDCMA
SB/LSOUT1
CPWMA
CPWMB
SB/LSOUT2
SA/CDCMB
DGND
34921
GATEOUT
ADCMA
ADCMB
BDCMA
BDCMB
VCORE
MC34921AE/R2
APWM
BPWM
5.0 V
3.3 V
GND
B+
B+
Device
High-Side
MOSFET
H-BRIDGE MOTOR DRIVER
ORDERING INFORMATION
AND POWER SUPPLY
AE SUFFIX (Pb-Free)
64-LEAD LQFP-EP
Motor
Motor
98ARH98426A
DC
DC
Temperature
34921
A
B
0°C to 70°C
Range (T
A
)
Rev 5.0, 07/2005
64 LQFP-EP
Package
MC34921

Related parts for MC34921AE

MC34921AE Summary of contents

Page 1

... Complete Support for • Analog Quadrature Encoder • Pb-Free package is designated by suffix AE Motor *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. MC34921AE/ 34921 B+ Serial MISO ...

Page 2

... Motor Driver A and Multiplexer Step Active Clamp Motor Driver Serial I Motor Driver Gate Driver Supervisor Circuitry GND DGND VBOOST Thermal Shutdown B+ BPWM BDCMA BDCMB B+ APWM ADCMA ADCMB S A/CDCMA SA /CDCMB S B/LSOUT1 SB /LSOUT2 CPWMA/CDCPWM CPWMB CDCMA/HSOUT1 CDCMB/HSOUT2 Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 3

... Core Voltage Output VCORE SELECT 3 SA/CDCMA DC Motor C Output A 4 SA/CDCMB DC Motor C Output B 5 SB/LSOUT1 6 SB/LSOUT2 7, 20, 21, 28, B+ Power Supply Input 29 25, NC 40, 57 Analog Integrated Circuit Device Data Freescale Semiconductor TERMINAL CONNECTIONS Figure 3. Terminal Function Description Formal Name Ground. Ground Core voltage regulator output voltage select. ...

Page 4

... I/V amplifier channel B filter. Analog Encoder Channel B Filter I/V amplifier channel A filter. Analog Encoder Channel A Filter Reset input and output. Reset Serial data out to MCU. Serial data in from MCU. Serial data clock. Serial Clock page 18 Definition Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 5

... Motor Driver C DC Motor Output or High- 63 CDCMA/HSOUT1 Motor Driver C DC Motor Output or High- Analog Integrated Circuit Device Data Freescale Semiconductor Formal Name Serial data strobe. Chip Enable Step motor driver Phase A PWM or DC motor driver PWM. Input A Digital ground. Digital Ground Step motor driver Phase B PWM ...

Page 6

... PWM I (C) PWM I STEP V BVDS V ESD = 100 pF, R ZAP ZAP Max Unit +0 400 5.4 V 5 +10% CORE_NOM A ±4.5 ±4.5 ±1 ±2000 ±200 ±250 = 1500 Ω), the Machine Model (C = 200 ZAP Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 7

... Terminal 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. 6. Maximum power dissipation at indicated ambient temperature in free air with no heatsink used. Analog Integrated Circuit Device Data Freescale Semiconductor Symbol ...

Page 8

... V 2.4 V -25 V 3.3 3 -0.1 V -10 V 3.3 3.3 3 0.0 10 100 0.0 25 400 µ 50 120 175 µ -100 0.1 100 V 4.8 5.0 5.2 mV – – ±100 mA 75 135 600 – 2.2 – V – 175 – mV Analog Integrated Circuit Device Data Freescale Semiconductor A A ...

Page 9

... A, GND Output PWM Motor Driver C Current Limit—Top Side Motor Driver C Current Limit—Bottom Side Notes 8. See Figure 10, Power-Up Sequencing, page 22. Analog Integrated Circuit Device Data Freescale Semiconductor 0°C T 70°C, and 0°C ≤ ≤ ≤ ≤ 25°C under nominal conditions unless otherwise noted. ...

Page 10

... J Typ Max Unit µ A – 0.1 ±40 4.0 2.0 % 6.0 µ 1 – – 1.5 A – 2 µ A – 0.5 40 µ A – 0 µ +10 B +11 – 0.1 0.3 Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 11

... 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 this requirement is met. Analog Integrated Circuit Device Data Freescale Semiconductor 0°C T 70°C, and 0°C ≤ ...

Page 12

... J Min Typ Max Unit µ -6.0 -8.0 -10 A µ -0.5 0.0 0.5 A µ 6.0 8 µ 0.25 0.5 0.75 A – – 8.0 Bits 0.0 – 5.0 V – 0.4 ±1.0 LSB – µ A – 0.1 10 Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 13

... The Full Scale Error is defined as the number of LSB values away from the ideal value of -1/2 LSB from Full Scale that the ADC output count actually transitions from -1 LSB count to Full Scale count when the input voltage is swept through the voltage range of interest. The transition must occur within the specified range. Analog Integrated Circuit Device Data Freescale Semiconductor 0°C T 70° ...

Page 14

... Analog Integrated Circuit Device Data Freescale Semiconductor Unit ...

Page 15

... A/D Speed Bit = 1 Master Oscillator Operating Frequency B+ ≥ Notes 24. Guaranteed by design. 25. See Figure 6, RST Timing, page 17. Analog Integrated Circuit Device Data Freescale Semiconductor DYNAMIC ELECTRICAL CHARACTERISTICS 0°C T 70°C, and 0°C ≤ ≤ ≤ ≤ 25°C under nominal conditions unless otherwise noted. ...

Page 16

... TIMING DIAGRAMS 90% B+ 90% B+ 34921 16 TIMING DIAGRAMS Figure 4. Serial Interface Timing t delay (C) Figure 5. Step Motor Crossover Delay Timing Output Output Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 17

... External RST Input slpl 34921 RST Analog Integrated Circuit Device Data Freescale Semiconductor t delay (RST) Figure 6. RST Timing TIMING DIAGRAMS 34921 17 ...

Page 18

... CORE VOLTAGE REGULATOR OUTPUT (VCORE) The output terminal of the VCORE linear regulator. Voltage options of 1.5v, 1.8v, or 2.5v are set by the potential of the VCORE Select pin at power up. It features current limit Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 19

... SWITCH in linear configuration also the power supply terminal for the MC34921AE on board logic. AN0/ANALOGOUT_A (AN0/ANALOGOUT_A) Mux input 0 for the A/D converter, which is also available in Freescale test mode as an output for the AN2 I/V converter ...

Page 20

... I/O. The CDCMA is PWM controlled via the CPWMA/ CDCPWM pin. The direction and HSOUT1 are controlled via the serial I/O. It includes current limit and thermal shutdown protection. Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 21

... SUPPLY 5V 5V SWITCH 5V SELECT Figure 8. 5.0 V Switching Regulator Mode Analog Integrated Circuit Device Data Freescale Semiconductor 3.3 V Regulator DC Motor Supervisory Switching Drivers RST Function 5.0 V Regulator Step Switching and ...

Page 22

... Table 20, page 31, and Regulator Output Voltage Select V CORE_NOM (Volts) 1.5 1.8 Floating 2.5 Driver). Configuration bit 13 Table 21, page 32 step motor driver (refer to NOM Step Motor Driver). Configuration Table 21, page 32.) Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 23

... The edge rates when switching the transistors b must be controlled so that shoot-through current does not affect B+. Analog Integrated Circuit Device Data Freescale Semiconductor Drivers) or, when Figure 11. External N-FET Gate Drive Circuit CLOCKING SCHEMES There are two basic clocking schemes that can be used while clocking data into the MC34921 IC ...

Page 24

... TSD is not set, the MISO RST output. will be asserted when the RST RST Other Data 3.3 V Fault Registers Registers ON Default value Updated at falling RST OFF Default value Updated at falling RST OFF Default value Updated at falling RST Analog Integrated Circuit Device Data Freescale Semiconductor , before , delay ...

Page 25

... A B digital encoder signals DENCA and DENCB, which are converted by the ADC to provide the analog position Analog Integrated Circuit Device Data Freescale Semiconductor FUNCTIONAL INTERNAL BLOCK DESCRIPTION (variable gain), channel inversion, and digital phase generation (see Figure Note: Freescale does not assume liability, endorse, or warrant components from external manufacturers that are referenced in this document ...

Page 26

... A/D conversions are in progress when an INFO word is requested. For input pairs, the inputs are listed in the order of conversion and , Input(s) Selected A B (28) with S/H A (28) (28) with S/H B Table 7. Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 27

... Therefore, the maximum source impedance of the circuit driving the selected A/D channel is 7.8 kΩ when the SCLK speed matches the speed configuration bit. Analog Integrated Circuit Device Data Freescale Semiconductor SCLK C < 11.7 pF hold Start Send Data2 ...

Page 28

... GATEOUT terminal. Deassertion connects the GATEOUT terminal to ground and ; when in DC motor mode, outputs B and A B Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 GATE A/Da2 A/Da1 A/Da0 start OUT Table 20 and Table 21 Truth Tables, Table 22 Truth Table, have no function. B Analog Integrated Circuit Device Data Freescale Semiconductor Bit 0 config ...

Page 29

... All defaults = 0 at power up. Table 14. Calibration Register Addressing caladdr0 caladdr1 Channel A gain 0 0 Channel A offset 1 0 Channel B gain 0 1 Channel B offset 1 1 Analog Integrated Circuit Device Data Freescale Semiconductor Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 cal1 cal0 ANALOG caladdr caladdr _TEST (LSB MODE (32) ...

Page 30

... Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 0 EXT B+UV Info V5VUV 3.3UV Bit Description Bit 4 Bit 3 Bit 2 Bit 1 A/Dr0 DENCB DENCA A/Ddone2 A/Ddone1 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 CoreU DENC DENC TSD Analog Integrated Circuit Device Data Freescale Semiconductor Bit 0 Bit 0 TW ...

Page 31

... Note The LSOUT terminals are controlled by the OUT1 and OUT2 signals (Bit 14 and Bit 15 in the NORMAL input frame). LSOUT is only available when Motor Driver C is configured as DC motor. (Set Bit CONFIG frame.) Xdca Xdcb XDCPWM Analog Integrated Circuit Device Data Freescale Semiconductor LOGIC COMMANDS AND REGISTERS condition not encountered. I LIMIT LIMIT Inputs I Top I RST LIMIT LIMIT ...

Page 32

... Output I Output TSD HSOUTx LIMIT X 1 OFF X 0 OFF 0 0 OFF Limited TSD Output x Output 1 OFF OFF 0 OFF OFF 0 Limited or OFF Limited or OFF 0 OFF OFF 0 ON OFF 0 OFF ON 0 OFF OFF 0 OFF OFF Analog Integrated Circuit Device Data Freescale Semiconductor x ...

Page 33

... AN2/ANALOGIN_A 44 Encoder AN1/ANALOGOUT_B 43 AN0/ANALOGOUT_A 42 51 MISO 52 MOSI 53 SCLK 54 CE GATEOUT 27 50 RST Analog Integrated Circuit Device Data Freescale Semiconductor TYPICAL APPLICATIONS 0.1 µ F CP1 CP2 VBOOST 20, 21, 28, 29, 62 Charge Pump Gate Voltage Generator 5.0 V Dual Mode Regulator B+ Oscillator 3.3 V Switching Regulator V ...

Page 34

... D 12.00 BSC D1 10.00 BSC e 0.50 BSC E 12.00 BSC E1 10.00 BSC L 0.45 0.75 L1 1.00 REF R1 0.08 --- R2 0.08 --- S 0.20 --- F 6.00 7.00 G 6.00 7.00 Z 0˚ 7˚ Z1 0˚ --- Z2 11˚ 13˚ Z3 11˚ 13˚ Analog Integrated Circuit Device Data Freescale Semiconductor ...

Page 35

... Analog Integrated Circuit Device Data Freescale Semiconductor NOTES PACKAGE DIMENSIONS 34921 35 ...

Page 36

... Freescale Semiconductor product could create a situation where personal injury or death may occur. Should a Buyer ...

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