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參數(shù)資料
| 型號： | L8202 |
| 廠商： | 意法半導體 |
| 英文描述： | MULTIFUNCTION ANALOG ASIC |
| 中文描述： | 多功能模擬集成電路 |
| 文件頁數(shù)： | 8/15頁 |
| 文件大?。?/td> | 237K |
| 代理商： | L8202 |
L8202
8/15
5
L8202 provides PWM bi-directional drive for two DC motors.
The PWM modulation is provided by the MDx_PWM input, and the current direction into the motor by the
MDCx_D bit in the serial input port.
The driver is protected versus overloads on the output lines to a max. current of 2 Amps peak.
The current protection circuit is implemented only on the High Side Drivers, so current protection is pro-
vided to motor currents only, but not to shorts between Motor Outputs to GND or Vs.
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.
If nReset is low the motor drive outputs are forced in high impedance
DC MOTOR DRIVERS OPERATIONS
Table 9. Absolute Maximum Ratings
(T
j
= 25°C, V
S
= 32V, unless otherwise specified)
Table 10. Electrical Characteristcs
(T
j
= 25 °C, V
S
= 32 V, unless otherwise specified
)
Table 11. Truth Table
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
I
DC_O
Pulsed Output Current
DC Motor Overcurrent
Threshold
2
1.5
A
A
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
R
DS(ON)
ON Resistance
I
LOAD
= -0.75A (from output to
GND) or I
LOAD
= +0.75A (from
Vs to output) @T
amb
=25°
0.31
0.32
W
f
PWM
PWM frequency
10
30
KHz
T
on
,T
off min.
Minimum Ton and Toff time
500
ns
DC
PWM
PWM Duty Cycle range
1
99
%
Internal
Thermal Bit
Inputs
Outputs
MDCx_D
DCx_PWM
DCxA
DCxB
L
L
L
H
H
L
H
L
H
H
L
H
H
H
H
H
L
H
X
X
All transistors turned off All transistors turned off
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