MC34920EI 데이터 시트보기 (PDF) - Freescale Semiconductor

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MC34920EI

2.8 Ω (Typ) Quad H-Bridge Motor Driver

Freescale Semiconductor 

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

Max

Unit

Voltage Overshoot

VOVRSHT

–

External VCC Load Current from 0.01 to 0.500 A, tRISE > 100 ns

–

5.0%

–

Load Ripple

0.5 A maximum

VOUTRIPPLE

mV

–

100

–

VBOOST GENERATOR

Charge Pump Output Voltage

ILOAD = 1.0 mA

VVB -VVB+

V

10

–

14

BIPOLAR CURRENT REGULATED STEP MOTOR DRIVE SYSTEM

Peak Step Motor Current, Phase A or B

Motor Not Stalled

ISTEPMOTOR

PEAK

–

Maximum Allowable Voltage Drop Across Any H-Bridge Switch

VDROP

ILOAD = 0.6 A (from Output to GND) or ILOAD = 0.6 A (from VVB+ to

–

Output)

A

–

0.6

V

–

1.6

Comparator High Threshold Voltage

CURR_I0_PHASEX=0, CURR_I1_PHASEX=0

Comparator Medium Threshold Voltage

CURR_I0_PHASEX=1, CURR_I1_PHASEX=0

Comparator Low Threshold Voltage

CURR_I0_PHASEX=0, CURR_I1_PHASEX=1

VOOFF Output Leakage Current for Step Motor Driver Outputs

VOOFF = 5.0 V

Step Motor Driver Thermal Shutdown Junction Temperature

Step Motor Driver Thermal Enable Junction Temperature

Single MOSFET

Typical Value @ TJ = 25°C

VTH

450

VTM

300

VTL

105

IOOFF

-1.0

TJ (SHUTDOWN)

155

TJ (ENABLE)

135

RDS(ON)

–

550

–

–

0.1

–

–

1.43

mV

650

mV

440

mV

255

mA

1.0

175

oC

155

oC

Ω

–

DC MOTOR DRIVE SYSTEM

Maximum Allowable Voltage Drop Across Any H-Bridge Switch

VDROP

V

ILOAD = 0.75 A (from Output to GND) or ILOAD = 0.75 A (from VVB+ to

Output) (Using 2 H-Bridges in Parallel)

–

–

1.3

Peak DC Motor Driver Current

Motor Not Stalled (Using 2 H-Bridges in Parallel)

IDCMOTOR

PEAK CURRENT

–

A

–

1.2

DC Motor Overcurrent Threshold (7)

IDCMOTOROCT

A

Motor Stalled (Paralleled H-Bridges Used for DC Motor Drive)

1.6

2.0

2.5

DC Motor Driver Sustaining Current Value

IDC_SUSTAIN

A

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+.

Analog Integrated Circuit Device Data

Freescale Semiconductor

34920

7

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