Datasheet
Supplyramp
Supply
EN
Timeforac-coupling
capacitorstocharge
DRV602
www.ti.com
SLOS572D –DECEMBER 2008–REVISED OCTOBER 2010
Pop-Free Power Up
Pop-free power up is ensured by keeping the EN (enable pin) low during power supply ramp up and down. The
EN pin should be kept low until the input ac-coupling capacitors are fully charged before asserting the EN pin
high; this way, proper precharge of the ac-coupling is performed, and pop-free power-up is achieved. Figure 10
illustrates the preferred sequence.
Figure 10. Power-Up Sequence
Capacitive Load
The DRV602 has the ability to drive a high capacitive load up to 220pF directly, higher capacitive loads can be
accepted by adding a series resistor of 10Ω or larger.
Layout Recommendations
A proposed layout for the DRV602 can be seen in the DRV602EVM user's guide (SLOU248) and the Gerber files
can be downloaded on www.ti.com, open the DRV602 product folder and look in the Tools and Software folder.
The gain setting resistors, R
IN
and R
fb
, must be placed close to the input pins to minimize the capacitive loading
on these input pins and to ensure maximum stability of the DRV602. For the recommended PCB layout, see the
DRV602EVM user's guide.
Copyright © 2008–2010, Texas Instruments Incorporated 9
Product Folder Link(s): DRV602