DRV2911-Q1:Automotive, single-channel PWM-input piezoelectric transducer driver for ultrasonic cleaning

Description

DRV2911-Q1 integrates two H-bridges for driving piezo-based Lens Cover Systems, LCS, up to 40V absolute maximum capability while maintaining a very low RDS(ON) to reduce switching losses. DRV2911-Q1 integrates a power management LDO (3.3V / 30mA) and buck converter (5.0V to 5.7V, ≤200mA) that can be used to power external circuits like the Ultrasonic Lens Cleaning (ULC) controller, ULC1001.

Each output driver channel consists of N-channel power MOSFETs configured in a half-bridge configuration. Two independent PWM inputs drive each half-bridge. The DRV2911-Q1 includes a 30mA, 3.3V LDO regulator.

Several protection features including supply undervoltage lockout (UVLO), charge pump undervoltage (CPUV), overcurrent protection (OCP), over-temperature warning (OTW), and over-temperature shutdown (OTSD) are integrated into DRV2911-Q1 to protect the device and system against fault events. Fault conditions are indicated by the FAULTZ pin. The fault pin can also be tied to the controller device, like ULC1001-Q1, where a fault can be recognized over I2C.

Features：

• AEC-Q100 qualified for automotive applications
• Temperature grade 1: –40°C ≤ TA ≤ 125°C
• Wettable flank package
• 2-Channel half bridge driver
• PWM-inputs for each half bridge control
• Overcurrent protection
• Supports up to 200kHz PWM frequency
• 5V to 35V operating voltage (40V abs max)
• High output current capability: 8A Peak
• Low MOSFET on-state resistance
• 95mΩ (typ.) RDS(ON) (HS + LS) at TA = 25°C
• Low power sleep mode
• 2.5µA (max.) at VPVDD = 13.5V, TA = 25°C
• Supports 1.8V, 3.3V, and 5V logic inputs
• Built-in 3.3V, 30mA LDO regulator
• Integrated protection features
• Supply undervoltage lockout (UVLO)
• Charge pump undervoltage (CPUV)
• Overcurrent protection (OCP)
• Thermal warning and shutdown (OTW/OTSD)
• Fault condition indication pin (FAULTZ)

Parameters：

Architecture:Class-D, Fully Differential, Single-ended

Input signal:PWM

Vs (min) (V):5

Vs (max) (V):3.6, 40

Vout (max) (V) :40

Iq (typ) (mA):7

Bandwidth (typ) (MHz): 0.0002

Shutdown current (ISD) (µA): 1.5

Rating: Automotive

Operating temperature range (°C) -40 to 125

The DRV2911-Q1, provided by Texas Instruments (TI), is a device that integrates two H-bridges for driving piezo-based Lens Cover Systems (LCS) with an absolute maximum operating voltage of 40V. It maintains a very low RDS(ON) to reduce switching losses. Additionally, the DRV2911-Q1 integrates a power management LDO (3.3V / 30mA) and buck converter (5.0V to 5.7V, ≤200mA) for powering external circuits like the Ultrasonic Lens Cleaning (ULC) controller, ULC1001.

Each output driver channel consists of N-channel power MOSFETs configured in a half-bridge configuration. Two independent PWM inputs drive each half-bridge. The DRV2911-Q1 includes a 30mA, 3.3V LDO regulator and offers various protection features such as undervoltage lockout, overcurrent protection, and thermal shutdown to safeguard the device and system against fault events.