DRV2511-Q1 Datasheet, PDF (13/25 Pages) Texas Instruments – DRV2511-Q1 8-A Automotive Haptic Driver for Solenoids and Voice Coils

www.ti.com
DRV2511-Q1
SLOS916A – JUNE 2016 – REVISED JULY 2016
Typical Applications (continued)
COMPONENT
Table 3. Component Requirements Table
DESCRIPTION
SPECIFICATION
C1
Supply capacitor
Capacitance
C2/C3
C4/C5
C6
C9
R1/R2
R_(PU)
Boost capacitor
Output snubber capacitor
Regulator capacitor
Input decoupling capacitor
Output snubber resistor
Pull-up resistor
Capacitance
Capacitance
Capacitance
Capacitance
Resistance
Resistance
TYPICAL VALUE
22 µF and 0.1 µF for
PVDD & AVDD
0.22 µF
470 pF
1 µF
0.1 µF
3.3 Ω
100 kΩ
8.2.1.2 Detailed Design Procedure
8.2.1.2.1 Optional Components
Note that in the diagrams, there are a few optional external components. These optional external components
may be needed in the application to meet EMI/EMC standards and specifications by filters necessary frequency
spectrums.
8.2.1.2.2 Capacitor Selection
A bulk bypass capacitor should be mounted between VBAT and GND. The capacitance needs to be >22 uF with
a X5R or better rating on the power pins to GND. Also include two ceramic capacitors in the ranges of 220 pF to
1 uF and 100 nF to 1 uF. The bootstrap capacitors, BSTA and BSTB, should be 220-nF ceramic capacitors of
quality X5R or better rated for at least the maximum rating of the pin.
8.2.1.2.3 Solenoid Selection
The DRV2511-Q1 solenoid driver can accommodate a variety of solenoids. Solenoids should have an equivalent
resistance of 1.6 Ω or greater. Solenoids with lower resistances are prone to driving high currents. A maximum
peak current of 8-A should not be exceeded. The DRV2511-Q1 will go into a shutdown mode to protect itself
from overcurrent.
8.2.1.2.4 Output Filter Considerations
The output filter is optional and is mainly for limiting peak currents. A second-order Butterworth low-pass filter
with the cut-off frequency set to a few kilohertz should be sufficient. See Equation 2, Equation 3, and Equation 4
for example filter design.
H(s) =
s²
+
1
2s + 1
(1)
L_x =
2 ´ R_L
2w_o
(2)
2
2 ´ C_F
=
2´
R_L
2
´
w₀
(3)
w₀ = 2p ´ ƒ
(4)
8.2.1.3 Application Curves
These application curves were taken using an HA200 solenoid with a 100-g mass, and the acceleration was
measured using the DRV-AAC16-EVM accelerometer. The following scales apply to the graphs:
• Output Differential Voltage scale is shown on the plots at 5-V/div
• Acceleration scale is 5.85-G/div
• Current scale is 2-A/div
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DRV2511-Q1
Submit Documentation Feedback
13