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PDF 33977 Data sheet ( Hoja de datos )
| Número de pieza | 33977 | |
| Descripción | Single Gauge Driver | |
| Fabricantes | Freescale Semiconductor | |
| Logotipo |  |
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Technical Data
Document Number: MC33977
Rev. 2.0, 1/2007
Single Gauge Driver
The 33977 is a Serial Peripheral Interface (SPI) Controlled, stepper
motor gauge driver Integrated Circuit (IC). This monolithic IC consists
of a dual H-Bridge coil driver and its associated control logic. The H-
Bridge drivers are used to automatically control the speed, direction,
and magnitude of current through the coils of a two-phase
instrumentation stepper motor, similar to an MMT-licensed AFIC 6405
of Switec MS-X156.xxx motor.
The 33977 is ideal for use in instrumentation systems requiring
distributed and flexible stepper motor gauge driving. The device also
eases the transition to stepper motors from air core motors by
emulating the damped air core pointer movement.
33977
SINGLE GAUGE DRIVER
Features
• MMT-Licensed Two-Phase Stepper Motor Compatible
• Switec MS-X15.xxx Stepper Motor Compatible
• Minimal Processor Overhead Required
• Fully Integrated Pointer Movement and Position State Machine
with Air Core Movement Emulation
• 4096 Possible Steady State Pointer Positions
• 340° Maximum Pointer Sweep
• Maximum Acceleration of 4500°/s2
• Maximum Pointer Velocity of 400°/s
• Analog Microstepping (12 Steps/Degrees of Pointer Movement)
• Pointer Calibration and Return to Zero (RTZ)
• Controlled via 16-Bit SPI Messages
• Internal Clock Capable of Calibration
• Low Sleep Mode Current
• Pb-Free Packaging Designated by suffix code EG
DW SUFFIX
EG SUFFIX (Pb-FREE)
98ASB42344B
24-PIN SOICW
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC33977DW/R2
MCZ33977EG/R2
-40°C to 125°C
24 SOICW
VPWR
5.0 V VDD
Regulator
MCU
33977
VPWR
VDD
SIN+
SIN-
RTZ
RST
CS
SCLK
SI
SO
GND
COS+
COS-
Motor
Figure 1. 33977 Simplified Application Diagram
Freescale Semiconductor, Inc. reserves the right to change the detail specifications,
as may be required, to permit improvements in the design of its products.
© Freescale Semiconductor, Inc., 2007. All rights reserved.
1 page  
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static Electrical Characteristics
Characteristics noted under conditions 4.75 V < VDD < 5.25 V, and -40°C < TA< 125°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
POWER INPUT (VDD)
Battery Supply Voltage Range
Fully Operational
Limited Operation (6), (7)
VPWR Supply Current
Gauge Outputs ON, No Output Loads
VPWR Supply Current (All Outputs Disabled)
Reset = Logic [0], VDD = 5.0 V
Reset = Logic [0], VDD = 0 V
Overvoltage Detection Level (8)
Undervoltage Detection Level (9)
Logic Supply Voltage Range (5.0 V Nominal Supply)
Under VDD Logic Reset
VDD Supply Current
Sleep: Reset Logic [0]
Outputs Enabled
POWER OUTPUT (SIN-, SIN+, COS-, COS+)
VPWR
V
6.5 – 26
4.0 26
IPWR
mA
– 4.0 6.0
IPWRSLP1
IPWRSLP2
–
–
µA
42 60
15 25
VPWROV
26
32
38
VPWRUV 5.0 5.6 6.2
VDD 4.5 5.0 5.5
VDDUV – – 4.5
V
V
V
V
IDDOFF – 40 65 µV
IDDON
– 1.0 1.8 mA
Microstep Output (Measured Across Coil Outputs)
SIN± (COS±) (Refer to Pin Definitions onpage 3)
ROUT = 200 Ω, PE6 = 0
V
Steps
Pin Definitions
6, 18,
0, 12
5, 7, 17, 19
1, 11, 13, 23
4, 8, 16, 20
2, 10, 14, 22
3, 9, 15, 21
3, 9, 15, 21
2, 10, 14, 22
5, 7, 17, 19
1, 11, 13, 23
5, 7, 17, 19
0, 12
6, 18
Full Step Active Output (Measured Across Coil Outputs) (10)
SIN± (COS±), Steps 1,3 (Pin Definitions 0 and 2)
VST6
VST5
VST4
VST3
VST2
VST1
VST0
VFS
4.82
0.94 VST6
0.84 VST6
0.68 VST6
0.47 VST6
0.23 VST6
0.1
5.3
0.97 VST6
0.87 VST6
0.71 VST6
0.50 VST6
0.26 VST6
0.0
6.0
1.0 VST6
0.96 VST6
0.8 VST6
0.57 VST6
0.31 VST6
0.1
4.9 5.3 6.0
V
Notes
6. Outputs and logic remain active; however, the larger coil voltage levels may be clipped. The reduction in drive voltage may result in a
loss of position control.
7. The logic will reset at some level below the specified Limited Operational minimum.
8. Outputs will disable and must be re-enabled via the PECCR command.
9. Outputs remain active; however, the reduction in drive voltage may result in a loss of position control.
10. See Figure 7.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33977
5
5 Page 
FUNCTIONAL DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION (OPTIONAL)
FUNCTIONAL INTERNAL BLOCK DESCRIPTION (OPTIONAL)
SPI
Logic
Internal
Reference
Under and
Overvoltage
Detect
Oscillator
H-Bridge
and Control
RTZ
Figure 6. Functional Internal 33977 Block Illustration
SERIAL PERIPHERAL INTERFACE (SPI)
This circuitry manages incoming messages and outgoing
status data.
OSCILLATOR
The internal oscillator generates the internal clock for all
timing critical features.
LOGIC
This design element includes internal logic including state
machines and message decoding.
INTERNAL REFERENCE
This design element is used for step value levels.
UNDER AND OVERVOLTAGE DETECTION
This design element detects when VPWR is out of the
normal operating range.
H-BRIDGE AND CONTROL
This circuitry contains the output coil drivers and the
multiplexers necessary for four quadrant operation and RTZ
sequencing. This circuitry is repeated for the Sine and Cosine
coils.
• Overtemperature — Each output includes an
overtemperature sensing circuit
• ILIM — Each output is current limited
RETURN TO ZERO (RTZ)
This circuitry outputs the voltage present on the non-driven
coil during RTZ operation.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33977
11
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet 33977.PDF ] | |
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