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PDF NCV70627 Data sheet ( Hoja de datos )
| Número de pieza | NCV70627 | |
| Descripción | Micro-stepping Motor Driver | |
| Fabricantes | ON Semiconductor | |
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NCV70627
Micro-stepping Motor Driver
Introduction
The NCV70627 is a single−chip micro−stepping motor driver with
position controller and control/diagnostic interface. It is ready to build
dedicated mechatronics solutions connected remotely with a LIN master.
The chip receives positioning instructions through the bus and
subsequently drives the motor coils to the desired position. The on−chip
position controller is configurable (OTP or RAM) for different motor
types, positioning ranges and parameters for speed, acceleration and
deceleration. The NCV70627 acts as a slave on the LIN bus and the
master can fetch specific status information like actual position, error
flags, etc. from each individual slave node.
An integrated sensor−less step−loss detection prevents the positioner
from loosing steps and stops the motor when running into stall. This
enables silent, yet accurate position calibrations during a referencing
run and allows semi−closed loop operation when approaching the
mechanical end−stops.
The chip is implemented in I3T50 technology, enabling both high
voltage analog circuitry and digital functionality on the same chip. The
NCV70627 is fully compatible with the automotive voltage
requirements. Due to the technology, the device is especially suited for
use in applications with fluctuating battery supplies.
www.onsemi.com
SSOP−EP
36 LEAD
CASE 940AB
1 32
QFN32, 5x5
CASE 488AM
ORDERING INFORMATION
See detailed ordering, marking and shipping information in the
package dimensions section on page 2 of this data sheet.
PRODUCT FEATURES
Motordriver
• Micro−stepping Technology
• Sensorless Step−loss Detection
• Peak Current up to 800 mA
• Low Temperature Boost Current up to 1100 mA
• Programmable Current Stabilization Phase
• Fixed Frequency PWM Current−control
• Automatic Selection of Fast and Slow Decay Mode
• No External Fly−back Diodes Required
• Compliant with 14 V Automotive Systems
Controller with RAM and OTP Memory
• Position Controller
• Configurable Speeds and Acceleration
• Input to Connect Optional Motion Switch
LIN Interface
• Physical Layer Compliant to LIN rev. 2.0. Data−link
Layer Compatible with LIN rev. 1.3 (Note 1)
• Field−programmable Node Addresses
• Dynamically Allocated Identifiers
• Diagnostics and Status Information
Protection
• Overcurrent Protection
• Open−circuit Detection
• High Temperature Warning and Management
• Low Temperature Flag
• LIN Bus Short−circuit Protection to Supply and Ground
• Lost LIN Safe Operation
• Enhanced Under Voltage Management
Power Saving
• Powerdown Supply Current < 150 mA
• 3.3 V Regulator with Wake−up On LIN Activity
EMI Compatibility
• LIN Bus Integrated Slope Control
• HV Outputs with Slope Control
• This is a Pb−Free Device
1. Minor exceptions to the conformance of the data−link layer to LIN rev. 1.3.
© Semiconductor Components Industries, LLC, 2015
August, 2015 − Rev. 0
1
Publication Order Number:
NCV70627/D
1 page  
NCV70627
Package Thermal Resistance
The NCV70627 is available in thermally optimized
SSOP−36 and QFN32 packages. For the optimizations, the
package has an exposed thermal pad which has to be
soldered to the PCB ground plane. The ground plane needs
thermal vias to conduct the heat to the bottom layer. Figure
3 gives examples for good power distribution solutions.
The thermal resistances are presented in Table 6: Thermal
resistance.
Table 6. THERMAL RESISTANCE
Characteristics
Package
Symbol
Min
Typ Max Unit
Thermal Resistance, Junction−to−Exposed Pad (Note 10)
SSOP−36
RqJP
− 3.3 − K/W
Thermal Resistance, Junction−to−Exposed Pad (Note 10)
QFN32
10. Also includes typical solder thickness under the Exposed Pad (EP).
RqJP
− 14 − K/W
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Figure 3. Example of SSOP−36 and QFN32 PCB Ground Plane Layout. Preferred layout at top and bottom
connected with through−hole filled vias
www.onsemi.com
5
5 Page 
NCV70627
Minimum Velocity
Once the maximum velocity is chosen, 16 possible values
can be programmed for the minimum velocity Vmin. The
table below provides the obtainable values in full−step/s.
The accuracy of Vmin is derived from the internal oscillator.
It is not recommended to change the Vmin while a motion
is ongoing.
Table 10. OBTAINABLE VALUES IN FULL−STEP/s FOR THE MINIMUM VELOCITY
Vmin
Index
Hex Dec
Vmax
Factor
A
99
Vmax (Full−step/s)
B CD
136 167 197 213 228 243 273 303 334 364 395 456 546 729 973
00
1 99 136 167 197 213 228 243 273 303 334 364 395 456 546 729 973
1 1 1/32 3 4 5 6 6 7 7 8 8 10 10 11 13 15 19 27
2 2 2/32 6
8 10 11 12 13 14 15 17 19 21 23 27 31 42 57
3 3 3/32 9 12 15 18 19 21 22 25 27 31 32 36 42 50 65 88
4 4 4/32 12 16 20 24 26 28 30 32 36 40 44 48 55 65 88 118
5 5 5/32 15 21 26 31 32 35 37 42 46 51 55 61 71 84 111 149
6 6 6/32 18 25 31 36 39 42 45 50 55 61 67 72 84 99 134 179
7 7 7/32 21 30 36 43 46 50 52 59 65 72 78 86 99 118 156 210
8 8 8/32 24 33 41 49 52 56 60 67 74 82 90 97 113 134 179 240
9 9 9/32 28 38 47 55 59 64 68 76 84 93 101 111 128 153 202 271
A 10 10/32 31 42 51 61 66 71 75 84 93 103 113 122 141 168 225 301
B 11 11/32 34 47 57 68 72 78 83 93 103 114 124 135 156 187 248 332
C 12 12/32 37 51 62 73 79 85 91 101 113 124 135 147 170 202 271 362
D 13 13/32 40 55 68 80 86 93 98 111 122 135 147 160 185 221 294 393
E 14 14/32 43 59 72 86 93 99 106 118 132 145 158 172 198 237 317 423
F 15 15/32 46 64 78 93 99 107 113 128 141 156 170 185 214 256 340 454
NOTES: The Vmax factor is an approximation.
In case of motion without acceleration (AccShape = 1) the length of the steps = 1/Vmin. In case of accelerated motion
(AccShape = 0) the length of the first step is shorter than 1/Vmin depending of Vmin, Vmax and Acc.
www.onsemi.com
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet NCV70627.PDF ] | |
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