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參數(shù)資料
| 型號(hào)： | L8202 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | MULTIFUNCTION ANALOG ASIC |
| 中文描述： | 多功能模擬集成電路 |
| 文件頁(yè)數(shù)： | 9/15頁(yè) |
| 文件大?。?/td> | 237K |
| 代理商： | L8202 |
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L8202
6
Two H Bridges are provided to implement current control through the two widings of a Bipolar Stepper Mo-
tor.
The phase and current level information are programmed over the serial input port (see Serial Interface
Bits definition section).
Four current levels (0%,33%,66%,100%) are programmable through the status of IN0 and IN1 bits in the
Input Serial Port.
This drive enters the fast current decay mode when both the I0_PH_X and I1_PH_X inputs set to the high
logic level (current is recirculated from GND to Vs supply).
A blanking period following a current turn-on event is included to prevent false current protection.
The H Bridges are protected versus cross-conduction.
Thermal protection with hysteresys is provided to the Motor Drivers.
During thermal protection event the Bridge Outputs are forced into a high impedance status.
STEPPER MOTOR DRIVER OPERATIONS
Table 12. Absolute Maximum Ratings
(T
j
= 25°C, V
S
= 32V, unless otherwise specified)
Table 13. Electrical Characteristcs (
T
j
= 25°C, V
S
= 32V, unless otherwise specified)
Table 14. Truth Table
Notes: 1. The 100% current is fixed by the sense resistor, and the Maximum Threshold of the Voltage Comparator
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
I
STEP_O
Pulsed Output Current
1.5
A
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
R
DS(ON)
ON Resistance
I
LOAD
= -0.6 A (from output to
GND) or I
LOAD
= +0.6 A (from
Vs to output) @T
amb
= 25°C
I0_PH_x = 0
I1_PH_x = 0
0.55
0.4
W
V
Comp_HT
Comparator High Threshold
Voltage
500
mV
V
Comp_MT
Comparator Medium Threshold
Voltage
I0_PH_x = 1
I1_PH_x = 0
333
mV
V
Comp_LT
Comparator Low Threshold
Voltage
I0_PH_x = 0
I1_PH_x = 1
167
mV
I
LEAK_VOFF
VoOFF Output Leakage
Current for Stepper Motor
Driver Outputs
VoOFF = 5V
I0_PH_x = 1
I1_PH_x = 1
0.5
mA
T
off
T
j
Off time
20
30
40
μ
s
Thermal shutdown
140
°C
T
j(enable_
hysterisys)
Stepper Motor driver thermal
enable junction temperature
hysterisys
20
°C
I0_PH_x
I1_PH_x
I
STEP_O_PH_x
L
L
100%
H
L
66 %
L
H
33 %
H
H
0 %
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