18VPP Piezo Sounder Driver
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The PAM8904 is a piezo sounder driver with integrated charge pump boost converter. The PAM8904 is capable of driving a ceramic/piezo sounder with 24VPP from a 5.5V power supply. The charge pump can operate in a 1x, 2x, or 3x mode.
The boost converter operates at a fixed frequency of 1.0MHz and provides a 12V output with a minimum number of external components. The PAM8904 can drive up to 15nF loading. Diodes Incorporated’s unique drive technology provides a small inrush current, low EMI and high efficiency.
The PAM8904 includes built-in automatic shutdown and wake up that guarantees longer battery life. The PAM8904 features thermal shutdown, overcurrent protection, overvoltage protection and undervoltage lock-out.
The PAM8904 is available in a 16-pin U-QFN3030-16 (Type B) package, a 12-pin U-QFN3030-12 (Type A) package, or a 12-pin UQFN2020-12 (Type UX) package.
Minimum VDD (V) | 2.3 |
---|---|
Compliance (Only Automotive supports PPAP) | Standard |
AEC Qualified | No |
Maximum VDD (V) | 5.5 V |
IQ (mA) | 1 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 | 3- 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 |