PAM8907: 31VPP Output Piezo Sounder Driver With Boost Converter (Audio)

Description

The PAM8907 is a piezoelectric horn driver with built-in boost converter, capable of driving a ceramic/piezo sounder with up to 31V_PP output. With integrated boost converter, the PAM8907 can provide an optimized solution with higher Sound Pressure Level (SPL) for louder output sound, lower quiescent current for longer standby time, and auto turn-on/off feature for extended operating lifetime. The PAM8907 provides clear benefits for battery-operated tracker, piezoelectric horn or alarm related applications.

The PAM8907 integrates a boost converter that operates at a typical frequency of 1.8MHz. With integrated boost converter and unique piezo sounder driver technology, the PAM8907 provides small inrush current, low EMI and yet highly efficient system performance. PAM8907 Boost converter output can be set to either 11V or 15.6V with minimum external components for various application usages.

The PAM8907 has built-in automatic shutdown and wake-up functions for longer operating lifetime requirement. It also features thermal shutdown protection, over-current protection, over-voltage protection and under-voltage-lockout protection to assure safe system operation.

The PAM8907 is available in U-QFN2020-10 package

Feature(s)

Supply Voltage Range from 1.8V to 5.5V
Intergraded Boost Converter V_OUT = 11V or 15.6V
Drive Piezo Sounder with up to 31V_PP
High-Speed Driver Designed with Very Short Turn-On/Turn-Off
No Voltage Cross Output at Shutdown Mode
High Impendence Output at Shutdown Mode
Low Current Consumption, with Shutdown Current < 1μA
Automatic Shutdown and Wake-Up Control
Available in Space-Saving U-QFN2020-10 package
Totally Lead-Free & Fully RoHS Compliant
Halogen and Antimony Free. “Green” Device
For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, 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)

Bluetooth or Wireless Location Tracker
Air Humidifier or Ultrasonic Related Piezo Driver Application
Security Devices, Home Appliances
Haptic Feedback

Specifications & Tech Docs

Product Parameters

Minimum VDD (V)	1.8
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	2-Step
Gain Min	N/A dB
Gain Max	N/A dB
SNR	N/A dB
PSRR	N/A dB
Special Features	Boost Converter Built-in