下载
PAM8904Q
Document number: DS38977 Rev. 2 - 2
1 of 11
www.diodes.com
November 2016
© Diodes Incorporated
PAM8904Q
AUTOMOTIVE 18VPP OUTPUT PEIZO SOUNDER DRIVER
Description
The PAM8904Q is a piezo sounder driver designed for driving a
ceramic/piezo sounder or speaker with 18V
PP
from a 3V power
supply. A programmable charge pump boost converter allows the
PAM8904Q V
OUT
to operate in 1x, 2x and 3x mode.
The boost converter operates at a fixed frequency of 1.0MHz and
provides a 9V output with a minimum number of external
components. PAMs unique drive technology ensures minimal inrush
current, low EMI and high efficiency.
To ensure maximum efficiency and battery life, the PAM8904Q
includes an auto standby feature which puts the device in sleep mode
while there is no valid input signal. A forced shutdown is also
available to enable the IC only when required.
To help protect the IC and system, the PAM8904Q includes
overtemperature shutdown, overcurrent and short circuit protection.
The PAM8904Q is available in a 16 pin U-QFN3030-16 (Type B)
package.
The PAM8904Q is qualified to AEC-Q100 Grade 2 and is Automotive
Compliant supporting PPAPs.
Features
Supply Voltage Range from 2.3V to 5V
18V
PP
Output from a 3V Supply
Integrated Boost Converter Generates 9V Supply
Wide Input Signal Capability 20Hz to 300kHz
Low Current Consumption
Automatic Standby and Wake-up Control
Overtemperature Shutdown and Short-Circuit Protection
Available in Space Saving Packages 16 pin U-QFN3030-16
(Type B) Package with Green Molding
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Qualified to AEC-Q100 Standards for High Reliability
AEC-Q100 Grade 2
PPAP Capable (Note 4)
Pin Assignments
(Top View)
U-QFN3030-16 (Type B)
Applications
Automotive Alarms
Dash Board Audio
GPS
Electric Vehicle Approach Warning
Automotive Security Device
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl)
and <1000ppm antimony compounds.
4. Automotive products are AEC-Q100 qualified and are PPAP capable. Refer to http://www.diodes.com/product_compliance_definitions.html.
NC
V
IN
CP
2
CP
1
V
OUT
NC
CN
2
VO
1
VO
2
NC
GND
CN
1
D
IN
CPM
1
NC
CPM
2
1
GND
