Page 1
A
f
Product Line o
Diodes Incorporated
PAM8904
Description
The PAM8904 is a piezo sounder driver with integrated a charge
pump boost converter. The PAM8904 is capable for driving a
ceramic/piezo sounder with 18Vpp from a 3V power supply. The
charge pump can operate in either of a 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. The PAM8904 can drive up to 15nF loading. PAM
unique drive technology provides small inrush current, low EMI and
high efficiency.
PAM8904 built-in automatic shutdown and wake up that guarantees
longer battery life.
PAM8904 features thermal shutdown, over current protection, over
NEW PRODUCT
voltage protection and under voltage lock-out.
The PAM8904 is available in a 16pin U-QFN3030 package.
Features
• Supply voltage Range From 2.3V to 5.5V
• 18V
• Integrated Boost Converter Generates 9V Supply
• Input signal 20 Hz to 300KHz
• No Voltage Cross Output At Shutdown Mode
• Low Current Consumption
• Automatic Standby and Wake-up Control
• Available in Space Saving Packages 16pin QFN package
Output from a 3V Supply
PP
18VPP OUTPUT PEIZO SOUNDER DRIVER
Pin Assignments
EN 1 EN2 DIN NC
Applications
• Health Care System
• Alarm Clock
• Security Device
• Home Appliance
U-QFN3030-16L
NC VIN CP2 VOUT
NC CP1 CN2 VO1-
CN1 GND VO2 NC
Typical Applications Circuit
PAM8904
Document number: DS37246 Rev. 1 - 2
1 of 6
www.diodes.com
April 2014
© Diodes Incorporated
Page 2
A
f
Pin Descriptions
Pin Name I/O/P Function
VIN P Power Supply
EN1 I Charge pump mode select 1
EN2 I Charge pump mode select 2
DIN I Signal Input
CN1 I Capacitor 1 Negative Terminal
GND P Ground
VO2 O Positive Output
VO1 O Negative Output
CN2 I Capacitor 2 Negative Terminal
CP1 I Capacitor 1 Positive Terminal
VOUT O Boost Output
CP2 I Capacitor 2 Positive Terminal
NC — No Connect
NEW PRODUCT
Absolute Maximum Ratings (@ T
Symbol Characteristics Value Unit
VIN
VI
TA
TJ
T
STG
Supply Voltage -0.3 to +6.0 V
EN1, EN2
Operating Free-Air Temperature Range -40 to +85 °C
Operating Junction Temperature Range -40 to +150 °C
Storage Temperature Range -65 to +150 °C
= +25°C, unless otherwise specified.)
A
Recommended Operating Conditions (@ T
Symbol Characteristics Min Max Unit
VIN Supply Voltage 2.3 5.0 V
VIH High-Level Input Voltage EN1,EN2
VIL Low-Level Input Voltage EN1,EN2
TA Operating Free-Air Temperature
Thermal Information
Product Line o
Diodes Incorporated
GND -0.3 to V
= +25°C, unless otherwise specified.)
A
-0.3 +0.4
-40 +85
1.2 to V
IN
IN
+0.3
+0.3
PAM8904
V
V
V
°C
Parameter Symbol Package Maximum Unit
Thermal Resistance (Junction to Ambient)
Thermal Resistance (Junction to Case)
PAM8904
Document number: DS37246 Rev. 1 - 2
θ
JA
θ
JC
2 of 6
www.diodes.com
U-QFN3030-16L 35 °C/W
U-QFN3030-16L 14 °C/W
April 2014
© Diodes Incorporated
Page 3
A
f
Product Line o
Diodes Incorporated
Electrical Characteristics (@T
Parameter Symbol Conditions Min Typ Max Unit
Output Voltage
Operating Current 1
Operating Current 2
Operating Current 3
Shutdown Current
NEW PRODUCT
Input Frequency
Oscillating Frequency
VOUT Start Delay Time
Shutdown Delay Time
Output Short-circuit Current
Control Terminal Voltage H VIH EN1, EN2, DIN pins
Control Terminal Voltage L VIL EN1, EN2, DIN pins 0
Control Terminal Current 1 IIH1 DIN = 3V 1 µA
Control Terminal Current 2 IIH2 VEN1, VEN2 = 3V,DIN = 3V 1 µA
Control Terminal Current 3 IIH3 VEN1, VEN2 = 3V, DIN = 0V 1 µA
= +25°C,VIN=3.0V, CPiezo=15nF, f
A
V
V
V
I
I
I
I
I
I
I
I
I
f
T
T
T
T
OUT1
OUT2
OUT3
DD11
DD12
DD13
DD21
DD22
DD23
DD31
DD32
DD33
I
SD
f
IN
OSC
ON1
ON2
ON3
OFF
I
SC
1x Mode 2.8 3 V
2x Mode 5.2 6 V
3x Mode 7.2 9 V
1x Mode, C
2x Mode, C
3x Mode, C
1x Mode, Single-ended application 0.3 mA
2x Mode, Single-ended application 1.4 mA
3x Mode, Single- ended application 3.9 mA
1x Mode, Differential application 0.9 mA
2x Mode, Differential application 3.6 mA
3x Mode, Differential application 7.9 mA
DIN = 0V 1 µA
Rectangular pulse 4 kHz
PIEZO
PIEZO
PIEZO
1x Mode, From DIN signal High to 90% V
steady state
2x Mode, From DIN signal High to 90% V
steady state
3x Mode From DIN signal High to 90% V
steady state
DIN = H- >L 42 ms
=4KHz, unless otherwise specified.)
DIN
= No Load
= No Load
= No Load
50 µA
720 µA
1700 µA
1 MHz
OUT
OUT
OUT
270
320
350
40 mA
0.8*V
IN
0.2*V
PAM8904
VIN
µs
µs
µs
V
V
IN
PAM8904
Document number: DS37246 Rev. 1 - 2
3 of 6
www.diodes.com
April 2014
© Diodes Incorporated
Page 4
A
f
Application Information
Charge Pump Mode Setting
DIN EN1 EN2 MODE
0 — — Shutdown Mode
1 0 0 Shutdown Mode
1 0 1 1X Mode
1 1 0 2X Mode
1 1 1 3X Mode
Timing Chart
Product Line o
Diodes Incorporated
PAM8904
NEW PRODUCT
PAM8904
Document number: DS37246 Rev. 1 - 2
4 of 6
www.diodes.com
April 2014
© Diodes Incorporated
Page 5
A
f
Ordering Information
Part Number Package Type Shipping
PAM8904JER U-QFN3030-16L 3,000/Tape & Reel
Package Type
J: U-QFN3030 E: 16 Pin R: Tape & Reel
Marking Information
Product Line o
Diodes Incorporated
PAM8904
PAM8904 X X X
Pin Configuration Shipping Package
NEW PRODUCT
U-QFN3030-16L
P8904
XXXYW
Package Outline Dimensions (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version.
PAM8904
Document number: DS37246 Rev. 1 - 2
A
E
(Pin #1 ID)
0
0
2
.
0
R
Z (8x)
SideView
D
e
0.450
D2
b (16x)
BottomView
A1
A3
E2
L (16x)
www.diodes.com
5 of 6
U-QFN3030-16
Type B
Dim Min Max Typ
A 0.55 0.65 0.60
A1 0 0.05 0.02
A3 — — 0.15
b 0.18 0.28 0.23
D 2.95 3.05 3.00
D2 1.40 1.60 1.50
E 2.95 3.05 3.00
E2 1.40 1.60 1.50
e — — 0.50
L 0.35 0.45 0.40
Z — — 0.625
All Dimensions in mm
April 2014
© Diodes Incorporated
Page 6
A
f
Product Line o
Diodes Incorporated
PAM8904
Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version
NEW PRODUCT
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2013, Diodes Incorporated
www.diodes.com
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
G1
X1
X (16x)
C
Y1
G
Y (16x)
IMPORTANT NOTICE
LIFE SUPPORT
Dimensions
C 0.500
G 0.150
G1 0.150
X 0.350
X1 1.800
Y 0.600
Y1 1.800
Value
(in mm)
PAM8904
Document number: DS37246 Rev. 1 - 2
6 of 6
www.diodes.com
April 2014
© Diodes Incorporated
Loading...