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PAM8906

36VPP Output Piezo Sounder Driver with Self-Excitation Mode

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Description

The PAM8906 is a piezoelectric sounder driver with built-in boost converter, capable of driving a piezo sounder with up to 36V_PP output. With integrated boost converter, the PAM8906 can provide an optimized solution with higher Sound Pressure Level (SPL) for louder output sound, and lower quiescent current along with auto turn-on/off feature for extended battery runtime. PAM8906 provides clear benefits for battery-operated piezoelectric sounder or alarm related applications.

With the integrated boost converter and unique piezo sounder driver technology, PAM8906 provides small inrush current, low EMI and yet delivers high system efficiency. The integrated boost converter switches at a fixed frequency of 1.8MHz and as a result, it can operate with a small 0.47µH inductor.

The PAM8906 comes in three different Output Voltage (V_OUT) options: 10V, 12V, and 18V.

The PAM8906 can operate with an external PWM input or operate in self-excitation mode (only 10V and 12V supported in this mode) for various piezo sounder applications. It also features thermal shutdown protection, over-current protection, over-voltage protection and under-voltage-lockout protection to ensure safe system operation.

The PAM8906 is available in MSOP-10 package for smaller PCB footprint and higher SMT yield.

Feature(s)

Supply Voltage Range from 2.1V to 5.5V
Intergraded Boost Converter with V_OUT = 10V, 12V or 18V
Automatic Shutdown and Wake-Up Control
Support External PWM Input or Self-Excitation Mode
Low Operating Current, with Shutdown Current < 1μA
High-Speed Driver Designed with Very Short Turn-On/Turn-Off
High-Impendence Output in Shutdown Mode
Available in Space-Saving MSOP-10 Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

Application(s)

Smoke / gas / water alarms, or industrial security alarms
Air humidifiers or ultrasonic related piezo driver applications
Security devices, home appliances
Haptic feedbacks

Product Specifications

Product Parameters

Minimum VDD (V)	2.1
Compliance (Only Automotive supports PPAP)	Standard
AEC Qualified	No
Maximum V_DD (V)	5.5 V
I_{Q (mA)}	<0.001 mA
Power/CH (W) @ THD=10%	N/A
Power/CH (W) @ THD=1%	N/A
Mono or Stereo	Mono
BTL	Yes
SE	No
Class-D or AB	D
Power Limit	No
Anti-Sat	No
Headphone Out	No
Efficiency (%)	N/A %
Volume/ Gain	N/A
Gain Min	N/A dB
Gain Max	N/A dB
SNR	N/A dB
PSRR	N/A dB
Special Features	Boost Converter Built-in and support self-excitation