PAM8904JPR Datasheet PAM8904JER, PAM8904JPR | P1-P3

PAM8904

Document number: DS37246 Rev. 1 - 2

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PAM8904

NEW PRODUCT

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Diodes Incorporated

18VPP OUTPUT PEIZO SOUNDER DRIVER

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

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

PP

Output from a 3V Supply

• 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

Pin Assignments

U-QFN3030-16L

Applications

• Health Care System

• Alarm Clock

• Security Device

• Home Appliance

Typical Applications Circuit

NC VIN CP2 VOUT

CN1 GND VO2 NC

EN 1 EN2 DIN NC

NC CP1 CN2 VO1-

PAM8904

Document number: DS37246 Rev. 1 - 2

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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

Absolute Maximum Ratings (@ T

A

= +25°C, unless otherwise specified.)

Symbol Characteristics Value Unit

V

IN

Supply Voltage -0.3 to +6.0 V

V

I

EN1, EN2

GND -0.3 to V

IN

+0.3

V

T

A

Operating Free-Air Temperature Range -40 to +85 °C

T

J

Operating Junction Temperature Range -40 to +150 °C

T

STG

Storage Temperature Range -65 to +150 °C

Recommended Operating Conditions (@ T

A

= +25°C, unless otherwise specified.)

Symbol Characteristics Min Max Unit

VIN Supply Voltage 2.3 5.0 V

V

IH

High-Level Input Voltage EN1,EN2

1.2 to V

IN

+0.3

V

IL

Low-Level Input Voltage EN1,EN2

-0.3 +0.4

V

T

A

Operating Free-Air Temperature

-40 +85

°C

Thermal Information

Parameter Symbol Package Maximum Unit

Thermal Resistance (Junction to Ambient)

θ

JA

U-QFN3030-16L 35 °C/W

Thermal Resistance (Junction to Case)

θ

JC

U-QFN3030-16L 14 °C/W

PAM8904

Document number: DS37246 Rev. 1 - 2

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Electrical Characteristics (@T

A

= +25°C,VIN=3.0V, CPiezo=15nF, f

DIN

=4KHz, unless otherwise specified.)

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage

V

OUT1

1x Mode 2.8 3 V

V

OUT2

2x Mode 5.2 6 V

V

OUT3

3x Mode 7.2 9 V

Operating Current 1

I

DD11

1x Mode, C

PIEZO

= No Load

50 µA

I

DD12

2x Mode, C

PIEZO

= No Load

720 µA

I

DD13

3x Mode, C

PIEZO

= No Load

1700 µA

Operating Current 2

I

DD21

1x Mode, Single-ended application 0.3 mA

I

DD22

2x Mode, Single-ended application 1.4 mA

I

DD23

3x Mode, Single- ended application 3.9 mA

Operating Current 3

I

DD31

1x Mode, Differential application 0.9 mA

I

DD32

2x Mode, Differential application 3.6 mA

I

DD33

3x Mode, Differential application 7.9 mA

Shutdown Current

I

SD

DIN = 0V 1 µA

Input Frequency

f

IN

Rectangular pulse 4 kHz

Oscillating Frequency

f

OSC

1 MHz

VOUT Start Delay Time

T

ON1

1x Mode, From DIN signal High to 90% V

OUT

steady state

270

µs

T

ON2

2x Mode, From DIN signal High to 90% V

OUT

steady state

320

µs

T

ON3

3x Mode From DIN signal High to 90% V

OUT

steady state

350

µs

Shutdown Delay Time

T

OFF

DIN = H- >L 42 ms

Output Short-circuit Current

I

SC

40 mA

Control Terminal Voltage H VIH EN1, EN2, DIN pins

0.8*V

IN

V

IN

V

Control Terminal Voltage L VIL EN1, EN2, DIN pins 0

0.2*V

IN

V

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

PAM8904JPR

PAM8904JPR

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