ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static Electrical Characteristics (continued)
Characteristics noted under conditions 21 V ≤ VVB+ ≤ 42 V, TA = 10°C to 55°C, TJ max = 135°C, VCC = 5.25 V max unless
otherwise noted. Typical values noted reflect the approximate parameter mean at TA = 25°C under typical conditions unless
otherwise noted.
Characteristic
Symbol
Min
Typ
5.0%
100
Max
Unit
Voltage Overshoot
V
–
OVRSHT
External V
Load Current from 0.01 to 0.500 A, t
> 100 ns
RISE
–
–
CC
Load Ripple
V
mV
V
OUTRIPPLE
0.5 A maximum
–
–
VBOOST GENERATOR
Charge Pump Output Voltage
V
V
VB- VB+
I
= 1.0 mA
10
–
14
LOAD
BIPOLAR CURRENT REGULATED STEP MOTOR DRIVE SYSTEM
Peak Step Motor Current, Phase A or B
Motor Not Stalled
I
A
V
STEPMOTOR
PEAK
–
–
–
–
0.6
1.6
Maximum Allowable Voltage Drop Across Any H-Bridge Switch
V
DROP
I
= 0.6 A (from Output to GND) or I
= 0.6 A (from V
to
VB+
LOAD
LOAD
Output)
Comparator High Threshold Voltage
V
mV
mV
mV
mA
TH
CURR_I0_PHASEX=0, CURR_I1_PHASEX=0
450
300
105
-1.0
550
–
650
440
255
1.0
Comparator Medium Threshold Voltage
V
TM
CURR_I0_PHASEX=1, CURR_I1_PHASEX=0
Comparator Low Threshold Voltage
V
TL
CURR_I0_PHASEX=0, CURR_I1_PHASEX=1
–
V OFF Output Leakage Current for Step Motor Driver Outputs
O
I OFF
O
V OFF = 5.0 V
O
0.1
oC
oC
Ω
Step Motor Driver Thermal Shutdown Junction Temperature
Step Motor Driver Thermal Enable Junction Temperature
Single MOSFET
T
155
135
–
–
175
155
J(SHUTDOWN)
T
J(ENABLE)
R
DS(ON)
Typical Value @ T = 25°C
J
–
1.43
–
DC MOTOR DRIVE SYSTEM
Maximum Allowable Voltage Drop Across Any H-Bridge Switch
V
V
DROP
I
= 0.75 A (from Output to GND) or I
= 0.75 A (from V
to
VB+
LOAD
LOAD
Output) (Using 2 H-Bridges in Parallel)
–
–
–
–
1.3
1.2
2.5
Peak DC Motor Driver Current
I
A
A
A
DCMOTOR
PEAK CURRENT
Motor Not Stalled (Using 2 H-Bridges in Parallel)
DC Motor Overcurrent Threshold (7)
I
OCT
DCMOTOR
Motor Stalled (Paralleled H-Bridges Used for DC Motor Drive)
DC Motor Driver Sustaining Current Value
1.6
2.0
I
DC_SUSTAIN
Current Allowed to Sustain for a Minimum of 100 ms (OCT delay),
Current Ripple 100 mA (Peak-to-Peak or Less)
1.6
2.0
2.4
Notes
7. 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+.
34920
Analog Integrated Circuit Device Data
Freescale Semiconductor
7
FREESCALE [ Freescale ]
