參數(shù)資料
型號(hào)： MC34920
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： 2.8 Ohm(Typ) Quad H-Bridge Motor Driver(2.8歐（典型值）四H橋電機(jī)驅(qū)動(dòng)器)
中文描述： 2.8歐姆（典型值）四H橋電機(jī)驅(qū)動(dòng)器（2.8歐（典型值）四魔橋電機(jī)驅(qū)動(dòng)器）
文件頁數(shù)： 8/28頁
文件大?。?/td> 813K
代理商： MC34920
34920
8
Go to: www.freescale.com
STATIC ELECTRICAL CHARACTERISTICS (continued)
Characteristics noted under conditions 21 V
≤
V
VB+
≤
42 V, T
A
=
10
°
C to 55°C, T
J
max = 135°C, V
CC
= 5.25 V max unless otherwise
noted. Typical values noted reflect the approximate parameter mean at T
A
= 25
°
C under typical conditions unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
DC MOTOR DRIVE SYSTEM
Maximum Allowable Voltage Drop Across Any H-Bridge Switch
I
LOAD
= 0.75 A (from Output to GND) or I
LOAD
= 0.75 A (from V
VB+
to
Output) (Using 2 H-Bridges in Parallel)
V
DROP
–
–
1.3
V
Peak DC Motor Driver Current
Motor Not Stalled (Using 2 H-Bridges in Parallel)
I
DCMOTOR
Peak Current
–
–
1.2
A
DC Motor Overcurrent Threshold (Note 8)
Motor Stalled (Paralleled H-Bridges Used for DC Motor Drive)
I
DCMOTOR
OCT
1.6
2.0
2.5
A
DC Motor Driver Sustaining Current Value
Current Allowed to Sustain for a Minimum of 100 ms (OCT delay),
Current Ripple 100 mA (Peak-to-Peak or Less)
I
DC_SUSTAIN
1.6
2.0
2.4
A
Differential DC Motor Driver Output Voltage
V
VB+
+ Rising Monotonically from 0 V to 42 V (1.0
μ
s < t
R
< 10 ms) OR
V
VB+
Falling Monotonically from 42 V to 0 V (1.0
μ
s < t
F
< 10 ms)
V
DCMD
–
–
4.0
V
DC Motor Driver Thermal Shutdown Output Voltage
I
OH
= 0.1 V
V
OH_DCM
V
VB+
- 0.5 V
–
–
V
DC Motor Driver Thermal Shutdown Junction Temperature
T
J(SHUTDOWN)
155
–
175
o
C
DC Motor Driver Thermal Enable Junction Temperature
T
J(ENABLE)
135
–
155
o
C
Equivalent Resistance
Using 2 H-Bridges in Parallel, Nom Value @ T
J
= 25°C
R
DS(ON)
–
0.73
–
Notes
8.
Because the current clamp is applied to the top H-bridge transistors only, overcurrent protection applies to motor currents. But note that no
short circuit protection exists against shorts from the DC motor outputs (DR1A1, DR1A2, DR1B1, or DR1B2 to substrate ground or to VB+.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
.
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