DRV2511-Q1 Datasheet, PDF (9/25 Pages) Texas Instruments – DRV2511-Q1 8-A Automotive Haptic Driver for Solenoids and Voice Coils

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DRV2511-Q1
SLOS916A – JUNE 2016 – REVISED JULY 2016
7.3 Feature Description
7.3.1 Analog Input and Configurable Pre-amplifier
The DRV2511-Q1 device features a differential input stage that cancels common-mode noise that appears on
the inputs. The DRV2511-Q1 device also features four gain settings that are configurable via external resistors.
GAIN
20 dB
26 dB
32 dB
36 dB
Table 1. Gain Configuration Table
R1
5.6 kΩ
20 kΩ
39 kΩ
47 kΩ
R2
open
100 kΩ
100 kΩ
75 kΩ
INPUT IMPEDANCE
60 kΩ
30 kΩ
15 kΩ
9 kΩ
REG
R2
GAIN
R1
GND
Figure 3. Gain Configuration
7.3.2 Pulse-Width Modulator (PWM)
The DRV2511-Q1 device features BD modulation scheme with high bandwidth, low noise, low distortion, and
excellent stability.
The BD modulation scheme allows for smaller ripple currents through the load. Each output switches from 0 V to
the supply voltage. With no input, the OUT+ and OUT- pins are in phase with each other so that there is little or
no current in the load. For positive differential inputs, the duty cycle of OUT+ is greater than 50% and the duty
cycle of OUT- is lower than 50% for a positive differential output voltage. The opposite is true for negative
differential inputs. The voltage accross the load sits at 0 V throughout most of the switching period, reducing the
switching current, which reduces the I²R losses in the load.
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DRV2511-Q1
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