DRV110: DRV110 Passive Selection

alikaan

Expert 2315 points

Part Number: DRV110

Hi everyone,

I would like to use the DRV110 for my solenoid valve application. My calculated parts and application ratings:

Rsens: 0.005 Ohm

Ckeep: 1uF

Rpeak: 1.2M Ohm

Rosc: 0 Ohm

Rhold: 285k Ohm

Voltage: 24V

Valve current: 6 Ampers

Please review the values.

Thanks!

over 5 years ago

0 Costin Cazana over 5 years ago

TI__Expert 4940 points

Hi,

Ivalve=6A is the Peak current?

If so:

Rsense: 0.05 Ohm

Ckeep: 1uF for Tkeep=100mS

Rosc: 0 Ohm or R=200kohm for Fpwm=20kHz

Rpeak: 200kohm for Ipeak=6A

Rhold: 133kohm for Ihold=1.5A, 100kohm for Ihold=2A

Regards,

Costin

0 alikaan over 5 years ago in reply to Costin Cazana

Expert 2315 points

Hi Costin,

Ipeak: 10A

Ivalve: 6A

Thanks

0 Costin Cazana over 5 years ago in reply to alikaan

TI__Expert 4940 points

Hi,

Rsense is too low, threshold comparator may be affected by noise.

My suggestion is to increase it to 0.015ohm

Rsense=0.015ohm

Rpeak=400kohm

Rsense=111kohm

Rsense=0.02ohm

Rpeak=300kohm

Rsense=83kohm

Regards,

Costin

Motor drivers

Motor drivers forum

DRV110: DRV110 Passive Selection