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MC34920EIR2 Datasheet(PDF) 7 Page - Freescale Semiconductor, Inc

No. de pieza MC34920EIR2
Descripción Electrónicos  2.8 ohm (Typ) Quad H-Bridge Motor Driver
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Fabricante Electrónico  FREESCALE [Freescale Semiconductor, Inc]
Página de inicio  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC34920EIR2 Datasheet(HTML) 7 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
Freescale Semiconductor
7
34920
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Voltage Overshoot
External VCC Load Current from 0.01 to 0.500 A, tRISE > 100 ns
VOVRSHT
5.0%
Load Ripple
0.5 A maximum
VOUTRIPPLE
100
mV
VBOOST GENERATOR
Charge Pump Output Voltage
ILOAD = 1.0 mA
VVB-VVB+
10
14
V
BIPOLAR CURRENT REGULATED STEP MOTOR DRIVE SYSTEM
Peak Step Motor Current, Phase A or B
Motor Not Stalled
ISTEPMOTOR
PEAK
0.6
A
Maximum Allowable Voltage Drop Across Any H-Bridge Switch
ILOAD = 0.6 A (from Output to GND) or ILOAD = 0.6 A (from VVB+ to
Output)
VDROP
1.6
V
Comparator High Threshold Voltage
CURR_I0_PHASEX=0, CURR_I1_PHASEX=0
VTH
450
550
650
mV
Comparator Medium Threshold Voltage
CURR_I0_PHASEX=1, CURR_I1_PHASEX=0
VTM
300
440
mV
Comparator Low Threshold Voltage
CURR_I0_PHASEX=0, CURR_I1_PHASEX=1
VTL
105
255
mV
VOOFF Output Leakage Current for Step Motor Driver Outputs
VOOFF = 5.0 V
IOOFF
-1.0
0.1
1.0
mA
Step Motor Driver Thermal Shutdown Junction Temperature
TJ(SHUTDOWN)
155
175
oC
Step Motor Driver Thermal Enable Junction Temperature
TJ(ENABLE)
135
155
oC
Single MOSFET
Typical Value @ TJ = 25°C
RDS(ON)
1.43
DC MOTOR DRIVE SYSTEM
Maximum Allowable Voltage Drop Across Any H-Bridge Switch
ILOAD = 0.75 A (from Output to GND) or ILOAD = 0.75 A (from VVB+ to
Output) (Using 2 H-Bridges in Parallel)
VDROP
1.3
V
Peak DC Motor Driver Current
Motor Not Stalled (Using 2 H-Bridges in Parallel)
IDCMOTOR
PEAK CURRENT
1.2
A
DC Motor Overcurrent Threshold (7)
Motor Stalled (Paralleled H-Bridges Used for DC Motor Drive)
IDCMOTOROCT
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)
IDC_SUSTAIN
1.6
2.0
2.4
A
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+.
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
Max
Unit


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