DRV8871_16 Datasheet, PDF (12/25 Pages) Texas Instruments – Brushed DC Motor Driver With Internal Current Sense (PWM Control)

DRV8871
SLVSCY9A – AUGUST 2015 – REVISED JANUARY 2016
www.ti.com
P_D I² R_DS(on)Source R_DS(on)Sink
(2)
The DRV8871 has been measured to be capable of 2-A RMS current at 25°C on standard FR-4 PCBs. The max
RMS current varies based on the PCB design, ambient temperature, and PWM frequency. Typically, switching
the inputs at 200 kHz compared to 20 kHz causes 20% more power loss in heat.
8.2.3 Application Curves
Figure 8. Current Ramp With a 2-Ω, 1 mH,
RL Load and VM = 12 V
Figure 9. Current Ramp With a 2-Ω, 1 mH,
RL Load and VM = 24 V
Figure 10. Current Ramp With a 2-Ω, 1 mH,
RL Load and VM = 45 V
Figure 11. t_PD
12
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