34920(2004) データシートの表示（PDF） - Freescale Semiconductor

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34920
(Rev.:2004)

2.8 Ω (Typ) Quad H-Bridge Motor Driver

Freescale Semiconductor 

Freescale Semiconductor, Inc.

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

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 (Note 8)

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

IDCMOTOROCT

A

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

Differential DC Motor Driver Output Voltage

VDCMD

V

VVB++ Rising Monotonically from 0 V to 42 V (1.0 µs < tR < 10 ms) OR

VVB+ Falling Monotonically from 42 V to 0 V (1.0 µs < tF < 10 ms)

–

–

4.0

DC Motor Driver Thermal Shutdown Output Voltage

IOH = 0.1 V

VOH_DCM

VVB+ - 0.5 V

–

V

–

DC Motor Driver Thermal Shutdown Junction Temperature

TJ (SHUTDOWN)

155

–

175

oC

DC Motor Driver Thermal Enable Junction Temperature

TJ (ENABLE)

135

–

155

oC

Equivalent Resistance

Using 2 H-Bridges in Parallel, Nom Value @ TJ = 25°C

RDS(ON)

Ω

–

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+.

34920

8

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