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PAM8904Q
Document number: DS38977 Rev. 2 - 2
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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 18VPP from a 3V power
supply. A programmable charge pump boost converter allows the
PAM8904Q VOUT 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
18VPP 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
VIN
CP2
CP1
VOUT
NC
CN2
VO1
VO2
NC
GND
CN1
DIN
CPM1
NC
CPM2
1
GND
ms PAM8904Q
PAM8904Q
Document number: DS38977 Rev. 2 - 2
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PAM8904Q
Typical Applications Circuit
Pin Descriptions
Pin Name
I/O/P
Function
CPM1
I
Charge pump mode select 1
CPM2
I
Charge pump mode select 2
DIN
I
Signal Input
NC
No Connection
CN1
I
Capacitor 1 Negative Terminal
GND
P
Ground
VO2
O
Positive Output
NC
No Connection
VO1
O
Negative Output
CN2
I
Capacitor 2 Negative Terminal
CP1
I
Capacitor 1 Positive Terminal
NC
No Connection
VOUT
O
Boost Output
CP2
I
Capacitor 2 Positive Terminal
VIN
P
Power Supply
NC
No Connect
GND
P
Recommended to connect to GND or No Connection
HODES magma
PAM8904Q
Document number: DS38977 Rev. 2 - 2
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PAM8904Q
Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.)
Symbol
Characteristics
Value
Unit
VIN
Supply Voltage
-0.3 to +5.5
V
VI
CPM1, CPM2
GND -0.3 to VIN +0.3
V
θJA
Thermal Resistance (Junction to Ambient)
35
°C/W
θJC
Thermal Resistance (Junction to Case)
14
°C/W
TJ
Operating Junction Temperature Range
-40 to +150
°C
TSTG
Storage Temperature Range
-65 to +150
°C
ESD Susceptibility
HBM
Human Body Model
8
kV
MM
Machine Model
600
V
CDM
Charged Device Model
1
kV
Caution: Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at conditions between maximum recommended operating conditions and absolute maximum ratings is not implied.
Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.
(Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling
and transporting these devices.)
Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)
Symbol
Characteristics
Min
Max
Unit
VIN
Supply Voltage
2.3
5.0
V
VIH
High-Level Input Voltage
CPM1, CPM2
1.2
VIN +0.3
V
VIL
Low-Level Input Voltage
CPM1, CPM2
-0.3
+0.4
V
TA
Operating Free-Air Temperature
-40
+105
°C
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PAM8904Q
Document number: DS38977 Rev. 2 - 2
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PAM8904Q
Electrical Characteristics (@TA = +25°C, unless otherwise specified.)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VOUT
Output Voltage Range
Note 5
2.1
12
V
VOUT1
Output Voltage
1x Mode
2.8
3
V
VOUT2
2x Mode
5.2
6
V
VOUT3
3x Mode
7.2
9
V
IDD11
Operating Current 1
1x Mode, CPIEZO = No Load
50
µA
IDD12
2x Mode, CPIEZO = No Load
720
µA
IDD13
3x Mode, CPIEZO = No Load
1,700
µA
IDD21
Operating Current 2
1x Mode, Single-ended application
0.3
mA
IDD22
2x Mode, Single-ended application
1.4
mA
IDD23
3x Mode, Single-ended application
3.9
mA
IDD31
Operating Current 3
1x Mode, Differential application
0.9
mA
IDD32
2x Mode, Differential application
3.8
mA
IDD33
3x Mode, Differential application
8.5
mA
ISD
Shutdown Current
DIN = 0V
1
µA
fIN
Input Frequency
Rectangular pulse on DIN
0.02
300
kHz
fOSC
Oscillating Frequency
1
MHz
tON1
VOUT Start Delay Time
1x Mode, From DIN signal High to 90%
VOUT steady state
270
µs
tON2
2x Mode, From DIN signal High to 90%
VOUT steady state
320
µs
tON3
3x Mode, From DIN signal High to 90%
VOUT steady state
350
µs
tOFF
Shutdown Delay Time
DIN = H- >L
42
ms
ISC
Output Short-Circuit Current
40
mA
OTP
Thermal Shutdown
Junction temperature
+150
°C
OTPHYS
Thermal Shutdown Hysteresis
+37
°C
VIH
Control Terminal Voltage H
CPM1, CPM2, DIN pins
0.8 x
VIN
VIN
V
VIL
Control Terminal Voltage L
CPM1, CPM2, DIN pins
0
0.2 x
VIN
V
IIH1
Control Terminal Current 1
DIN = 3V
1
µA
IIH2
Control Terminal Current 2
VCPM1, VCPM2 = 3V, DIN = 3V
1
µA
IIH3
Control Terminal Current 3
VCPM1, VCPM2 = 3V, DIN = 0V
1
µA
CL
Capacitive Load
15
50
nF
Note: 5. It is possible to drive VOUT, VO1 and VO2 to 3x VDD. A supply voltage of 4V of more should not be used in 3x mode as this will exceed the maximum
output voltage rating.
PAM8904Q Operalmg Current (mA) Operatmg Current (mA) V01(Vpp) N o ._. ow ,_. N on a 0 Operating Current Vs lnpm Voltage [Dilferential output) 81 10 E s ‘E a 6 / 5 o / g 4 / 2mm g / 2mm ’ 8 Z I 0 3 4 5 2 3 A 5 6 lnput Voltage [V) Operating Current vs Input Voltage (No Load) / / 3 4 5 1an Voltage (V) 0 1 2 3 4 5 5 FreauenchHZ) 1an Voltage (V) Operating Current Vs Input Voltage (Single Ended Outpm) 0 014 0 012 001 0 008 0 006 150(0A) 0 004 0 002 0 1 2 3 A 5 0 mm Voltage (V) Shutdown Current Vs Input Voltage 120 119 118 117 116 115 114 113 112 111 V01(Vpp) 0 1 2 3 4 5 6 7 8 FreauenchHZ)
PAM8904Q
Document number: DS38977 Rev. 2 - 2
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PAM8904Q
Performance Characteristics (@TA = +25°C, VIN = 3.0V, CPiezo = 15nF, fDIN = 4kHz, unless otherwise specified.)
3x mode
2x mode
1x mode
3x mode
2x mode
1x mode
3x mode
2x mode
1x mode
10nF
22nF
33nF
40nF
50nF
10nF
33nF
40nF
50nF
PAM8904Q V014v02(vpp) 180 175 170 165 160 155 150 145 140 3 4 5 FreauenchHZ) VO1AV02(Vpp) 240 235 230 225 220 215 210 3 A 5 FreauenchHZ)
PAM8904Q
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PAM8904Q
Performance Characteristics (Cont. @TA = +25°C, VIN = 3.0V, CPiezo = 15nF, fDIN = 4kHz, unless otherwise specified.)
10nF
22nF
33nF
40nF
50nF
22nF
10nF
22nF
33nF
40nF
50nF
PAM8904Q i ChargePumpDn 1013?;qu ‘ 1 ‘ Vow \ 1 \ 4’1 H7 1ON 1 4H H7 tow 1‘ a 1‘ DIN ‘ 1 \ _ _ _ _ _ _ ‘ _ _ _ ‘ H ‘ F ‘ \ \ \ _ _ _ _ _ _ i _ _ _ v0, 1 i \ ‘ tor; \ 1 \ vol
PAM8904Q
Document number: DS38977 Rev. 2 - 2
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PAM8904Q
Application Information
Charge Pump Mode Setting
The Charge Pump Mode (CPM) pins CPM1 and CPM2 are used to set the charge pump into mode 1x VDD, 2x VDD, 3x VDD or they can be used to
put the PAM8904Q in to a forced low current shutdown mode.
DIN
CPM1
CPM2
MODE
0
Shutdown Mode
1
0
0
Shutdown Mode
1
0
1
1x Mode
1
1
0
2x Mode
1
1
1
3x Mode
Care must be taken when using the 3x mode with a VDD supply of 4V or more as this will force the VOUT to exceed its maximum specification. The
table shows the safe operating range of the PAM8904Q.
VDD Range
Mode
2.3V to 3.9V
1x, 2x and 3x
4.0V to 5.0V
1x and 2x only
Timing Chart and Device Operation
When one or both of the CPM pins are pulled high, the device enters normal operation mode, refer to the above table for the mode selection.
Once the PAM8904Q senses a valid signal on the DIN pin, the charge pump will start and provide the desired voltage on the VOUT pin and the
output drive VO1 and VO2 start to function after time tON which is typically between 270µs and 350µs depending on the mode chosen. Once the
input signal on DIN is removed, the PAM8904Q senses this and waits typically 42ms to ensure the signal has been removed. If there is no further
valid signal within the time period tOFF, the PAM8904Q enters into a low current standby mode.
tON
tON
tOFF
t0
ms PAM8904Q
PAM8904Q
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PAM8904Q
Application Information (Cont.)
Output Configuration
The PAM8904Q is able to be configured either in a differential or a single ended configuration.
Differential Output Typical Application Circuit
C1 = 0.1uF C2 = 0.1uF
CIN = 0.1uF
VIN
CPM1
CPM2
DIN
GND
VOUT
VO1
VO2
Piezo Sounder/
Speaker
COUT = 0.1uF
Charge Pump
Mode:1x, 2x, 3x or Shutdown
Controller Oscillator
Detector Protection
Short Circuit/
OTP
Level Shift
Single Ended Output Typical Application Circuit
C1 = 0.1uF C2 = 0.1uF
CIN = 0.1uF
VIN
CPM1
CPM2
DIN
GND
VOUT
VO1
VO2
Piezo Sounder/
Speaker
COUT = 0.1uF
Charge Pump
Mode:1x, 2x, 3x or Shutdown
Controller Oscillator
Detector Protection
Short Circuit/
OTP
Level Shift
When using the PAM8904Q with a single ended output, the VO2 pin should be left open circuit.
PAM8904Q
PAM8904Q
Document number: DS38977 Rev. 2 - 2
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PAM8904Q
Application Information (Cont.)
Short-Circuit Protection
The PAM8904Q has short circuit protection circuitry on the outputs to prevent damage. Once a short circuit is detected on the outputs the chip will
limit the total current to protect the output device. This is not a latched fault; once the short is removed the normal operation is restored.
Thermal Protection
If the junction temperature of the PAM904Q exceeds +150°C the device will enter overtemperature shutdown. The outputs and the charge pump
will be switched off. Once the junction temperature cools down to its normal operating condition, the IC will re-start automatically.
Ordering Information
PAM8904Q X X X
J: U-QFN3030-16 (Type B) E: 16 Pin R: Tape & Reel
Part Number
Package
Code
Package Type
(Notes 6 & 7)
7” Tape and Reel
Qualification
(Note 8)
Quantity
Part Number Suffix
PAM8904QJER
J
U-QFN3030-16 (Type B)
3,000/Tape & Reel
R
Automotive Compliant
Notes: 6. Pad layout shown at http://www.diodes.com/package-outlines.html.
7. For Tape and reel information see http://www.diodes.com/_files/datasheets/ap02007.pdf.
8. PAM8904Q has been qualified to AEC-Q100 grade 2 and is classified as “Automotive Compliant” supporting PPAP documentation. Automotive, AEC-
Q100 and standard products are electrically and thermally the same, except where specified.
For more information, please refer to http://www.diodes.com/product_compliance_definitions.html.
See PAM8904 datasheet for commercial qualified versions.
Marking Information
U-QFN3030-16 (Type B)
(Top View)
Package Type
Pin Configuration
Shipping Package
P8904Q
XXXYW
P8904Q: Product Code
XXX: Internal Code
Y: Year 0-9
W: Week: A~Z: 1~26 weeks;
a~z: 27~52 weeks;
z represents 52 and 53 weeks
PAM8904Q 1 1 l I x 1 x I 1 $ SideView \ UJ W U 3 l 3 C “0100,, 1 E7 1.737 fi’DT” fig: *3 i C { m NW N77 0“ ‘ Ha‘ b(l6 $ BottomView JD |_J D :1 43” mm ] 3 Ni am
PAM8904Q
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PAM8904Q
Package Outline Dimensions
Please see http://www.diodes.com/package-outlines.html for the latest version.
U-QFN3030-16 (Type B)
Suggested Pad Layout
Please see http://www.diodes.com/package-outlines.html for the latest version.
U-QFN3030-16 (Type B)
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
Dimensions
Value
(in mm)
C
0.500
G
0.150
G1
0.150
X
0.350
X1
1.800
Y
0.600
Y1
1.800
Side View
AA3
A1
Bottom View
D
D2
E
e
b (16x)
L (16x)
E2
(Pin #1 ID)
Z (8x)
0.450
R0.200
X (16x)
Y (16x)
C
Y1
X1
G1
G
EGDES magma
PAM8904Q
Document number: DS38977 Rev. 2 - 2
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PAM8904Q
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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final and determinative format released by Diodes Incorporated.
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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
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
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failure of the life support device or to affect its safety or effectiveness.
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