Download DRV2700

DRV2700: 200Vpp, 1000Vp Piezoelectric
Actuator Driver
Created 3/04/2015
Updated 3/04/2015
1
DRV2700
200Vpp, 1000Vp Piezoelectric Actuator Driver
Features
Benefits
• 40 VPP to 200 VPP Output (Boost+amp mode)
• Drives bi-directional piezo actuators
• Up to 1000Vp Output (Flyback mode)
• Drives high voltage into uni-directional piezos
• Boost Converter with Integrated FET & Diode
• 90% Smaller footprint vs. discrete circuit
• Adjustable Boost Voltage (15-105V)
• Optimized voltage for application
• Adjustable Boost Current Limit (<2.25A)
• Inductor & current drive sized to application
• Small-signal bandwidth to 20kHz
• Excellent audio voice quality for piezo sounders
• Fast Start Up Time of 1.5ms
• Fast startup from shutdown
• Thermal Protection
• Reliable device operation
• 4 mm x 4 mm x 0.9 mm QFN package
• Easy-to-use device footprint
Applications
VBAT
L1
• Piezoelectric Positioning Actuators
• Piezo stacks
• Piezo Benders
• Piezo Discs
• Piezoelectric Micropumps
• Piezoelectric Sounders, Speakers
• Electroactive Polymer Actuators
• High Voltage bias circuits
• Building Automation: Security
CPUMP
CBOOST
Boost
Converter
R1
REXT
DRV2700
IN+
Gain
INEN
GAIN0
GAIN1
R2
+
–
Piezo
Actuator
Piezo Driver Portfolio
Boost Voltage
New
Roadmap
Future
High Voltage
200
DRV2701
Actuator Driver
100
DRV2700
200VP Piezo Driver
Charge Amplifier
SPI Interface
4x4mm QFN
200VPP , 1000VP Piezo Driver
Linear Amplifier
4x4mm QFN
Integration
Multi-Channel
Competitive Landscape
Part Number
Strength
Concern
Weakness
Linear Tech
LT3469
MPS
MP3801
Microchip
HV513
TI
DRV2700
2.5-16V
2.5-5.5V
50-250V
3.0 – 5.5V
N/A
200Vpp
N/A
200Vpp
35Vp
100Vp
250Vp
1000Vp
Y
Y
N
Y
Y
N
N
Y
Differential
Oscillator
Digital
Differential
Small-signal
bandwidth
600kHz
1kHz
300Hz
20kHz
Switch FET
current
220mA
100mA
9.5mA
2.25A
Maximum
capacitive load
200nF
??
50nF
>10mF
3.9mA
10nA
2.0mA
13mA
2.9 x 2.8 x 1.0 mm
8.1mm2
4.8 x 3.0 x 0.9
14.4mm2
6.0 x 6.0 x 0.8
36mm2
4.0 x 4.0 x 1.0 mm
16mm2
Input Supply
Voltage (V)
Output Voltage
(Differential)
Output Voltage
(Single-ended)
Integrated Boost?
Linear Amplifier?
Input type
Shutdown current
Package size
Success Stories: DRV2700
Piezo Alarm Sounder
Where We Won
Why We Won
Who: EMEA Fire Detection Provider
•
Customer’s existing resonant piezo
driver provided loud alarms but poor
voice quality.
•
DRV2700 was able to replace the high
output voltage (>80Vpp), maintain the
required loudness and flat frequency
response provided good voice quality.
What: DRV2700, MSP430FR2033,
TPS62080
Where: Alarm Sounder
Volume: 80ku/yr; $150k / year
Customer Need: Voice alerts and alarm
sirens at high SPL using piezo sounder
Battery
TPS62080
3.0V
Piezo
Sounder
MSP430FR2033
Voice + Tone
Generation
PWM
DRV2700
80Vpp
Success Stories: DRV2700
Industrial Inkjet Printhead
Where We Won
Why We Won
Who: Japanese Industrial Printhead Provider
•
DRV2700 provided significantly smaller
solution than the customer’s prior
piezo driver solution (discrete).
•
DRV2700 was able to replace the high
output voltage in a smaller form factor
while maintaining the required ink flow
rate. Customer’s design based on
DRV2700EVM-HV500.
What: DRV2700 (4pcs per system)
Where: Industrial Inkjet Printhead
Volume: 40ku/yr; $100k / year
Customer Need: 280Vpp at 100Hz into
piezoelectric micropump (~40nF load)
Power
PWM
5.0V
DRV2700
Printhead
Controller
Frequency /
amplitude control
Pump A
140Vp
280Vpp
DRV2700
DRV2700
140Vp
140Vp
Pump B
280Vpp
DRV2700
Ink
140Vp
Ink
TI Designs or Application: TIDA-00376
Getting Your Customer Started
Piezo Audio Annunciator & LED Drive
Solution Features
Solution Benefits
 Drives a Piezo Speaker
 >90 dBA for single-tone (520Hz and
3.1kHz, per output design goal)
 Plays back audio files through piezo
speaker
 Drives LEDs for visual indication
 1-2 Hz flashing frequency
 Complies with NFPA candela requirement
 Annunciator audio output (single frequency tone
or audio)
 High-intensity LED strobe light visual indicator
 Compliant to National Fire Protection
Association (NFPA) Code standards
 Coming Summer 2015
System Level View
Piezo Transducer
Haptics
Piezo
Driver
DRV2700
200Vpp, 1000Vp Piezoelectric Actuator Driver
Features
Discovery
Questions
Pricing &
Availability
•
•
•
•
•
•
•
•
•
•
•
Boost + amplifier mode provides 40-200 VPP Output
Flyback mode provides up to 1000Vp Output
Boost Converter with Integrated FET & Diode
Boost Voltage: 15-105V
Adjustable Boost Switch Current Limit (<2.25A)
Small-signal bandwidth: 20kHz
Stable into capacitive loads (piezo actuators)
Fast Start Up Time: 1.5ms
Shutdown current: 13mA
Thermal Protection
4 mm x 4 mm x 0.9 mm QFN package
DRV2700
200Vpp, 1000Vp Piezoelectric Actuator Driver
Features
Discovery
Questions
Pricing &
Availability
• Do you use piezoelectric actuators or transducers?
• DRV2700 is the smallest solution for driving
piezoelectric actuators up to 200Vpp or 1000Vp
• What type of drive (single-ended/unidirectional or
differential/bidirectional) and voltage are required?
• DRV2700 can provide up to 200Vpp differential
(boost+amp mode) or 1000Vp single-ended
(flyback mode)
• What frequency and load capacitance are required?
• DRV2700 supports up to 20kHz output frequency
and capacitive loads as high as 4.7mF
• Do you have other (non-piezo) needs for high voltage
drive or supply in your system?
DRV2700
200Vpp, 1000Vp Piezoelectric Actuator Driver
Features
Discovery
Questions
Pricing
Availability
Resources
Product Info: DRV2700
Pricing 1Ku: $4.95 (See TI.com for current pricing)
Availability:
– Silicon:
– Samples Now
– Full production March 2015
– Evaluation Boards: DRV2700EVM March 2015
– DRV2700EVM-HV500 April 2015
– Software: for EVM, March 2015
– Datasheet: March 2015
– Models: DRV2700
Additional resources:
Support: (E2E) Haptics Forum
TI Designs: Piezo Sounder Reference Design coming Summer 2015
DRV2700
200Vpp, 1000Vp Piezoelectric Actuator Driver
• Why were these parts developed?
– To provide a compact solution for driving piezoelectric actuators
– To enable customers to use piezoelectric actuators in a wide range of
applications where space for electronics is limited and prior solutions were
too large
– To simplify customers’ development of drive circuitry for piezo actuators
• What differentiates this part?
– With solution size under 100mm2, it’s < 1/15th the size of comparable
discrete solutions.
– It’s amplifier is specifically designed for driving capacitive loads
– The integrated boost converter can provide up to 105V in boost mode or
1000Vp in flyback mode.
– TI’s only single-chip 100V boost converter and 200Vpp amplifier.
Who to Sell To…
Application Area #1
(Building Automation)
Application Area #2
(Positioning/Optics)
Application Area #3
(Microfluidics)
Example End
Equipments
• Fire Alarm Sounders
• Security Alarm Sounders
• User Input Panels
•
•
•
•
Telescopes
Microscopes
Stages
Semiconductor Equipment
•
•
•
•
Key Market
Differentiators
• High Voltage = Loudness
• Flat frequency response
• Small solution Size
•
•
•
•
High Voltage
Small solution
Good linearity
Single-ended drive (for some
applications)
• High Voltage
• AC bidirectional drive
• Small solution
Industrial Inkjet Printing
Chemical printer/analyzer
Drug delivery
Medical Analysis Equipment
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