Diodes PAM8615 User Manual

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Description

The PAM8615 is a 16W 32W (per channel) efficient Class-D audio

power amplifier for driving stereo speakers in a single-ended

configuration or mono bridge-tied speaker. The PAM8615 can drive

single-ended speakers as low as 4Ω. Due to the low power

dissipation and high efficiency the device can be used without any

external heat sink when playing music.

Stereo speaker volume is controlled with a DC voltage applied to the

volume control terminal offering a range of gain from -40dB to +36dB.

The PAM8615 is available in a TSSOP-24 package.

Features

A Product Line o

Diodes Incorporated

PAM8615

16W/ 32W STEREO CLASS-D AUDIO POWER AMPLIFIER

Pin Assignments

• 32W/ch into 8Ω BTL Load from 24V Supply (Thermal Limited)

• 16W/ch into 4Ω SE Load from 24V Supply (Thermal Limited)

• Operates from 8V to 30V

• Supports Multiple Output Configurations:

 2-Ch Single-ended (half bridge)(16WX2)

 1 Ch Bridge-tied load (full bridge) (32WX1)

• High Efficiency Above 90%

• 64-Setup DC Volume Control from -40dB to +36dB

• Singel Ended Analog Inputs

• Thermal and Short-Circuit Protection

• Flexible Frequency Adjustable by External Component

• Clock Output for Synchronization with Multiple Class-D Devices

• No Pop Noise for Start-Up and Shut-Down Sequences

• Space-Saving Surface-Mount 24 Pin TSSOP Package

• Pb-Free Package

PAM8615

Document number: DSxxxxx Rev. 1 - 1

www.diodes.com

Applications

• Televisions

• Home Sound Systems

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Typical Applications Circuit

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PAM8615

Single-Ended Configuration

PAM8615

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BTL Configuration

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Pin Descriptions

Number

1 OUT_A O 2 PVCC_A P 3 SHDN I

4 MUTE I

5 IN_A I 6 DGND P 7 IN_B I 8 VCM O 9 DCV I

10 MS_SV I

11 PVCC_B P

12, 13 OUT_B O

14 PGND_B P 15 BST_B I/O

16 VCLAMP P

17 STNC I/O 18 AGND P 19 ROSC I/O 20 AVDD P 21 AVCC P 22 BST_A I/O 23 PGND_A P

PAM8615

Document number: DSxxxxx Rev. 1 - 1

Name

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Diodes Incorporated

PAM8615

I/O/P Function

H-bridge A output.

Power supply for H-bridge A not connected to PVCC_B or AVCC.

Shutdown signal for IC (low = shutdown, high = operat ional). TTL logic levels with compliance to AVCC.

Alogic high on this pin disables the outputs. A low on this pin enables the outputs. TTL logic levels with compliance to AVCC.

Audio input for channel A.

Digital GND

Audio input for channel B.

Reference for analog cells.

DC voltage setting the gain of the amplifier.

Master/Slave select for determining direction of SYNC terminal. High = Master mode, SYNC terminal is an output; Low = Slave mode, SYNC terminal accept s a clock input.

Power supply for H-bridge B, not connected to PVCC_A or AVCC

H-bridge B output

Power ground for H-bridge B

Bootstrap I /O for H-bridge B high-side FET

Internally generated voltage supply for bootst rap. Not to be used as a supply or connected to any component other than the decoupling capacitor.

Clock i nput/output for synchroni zing multiple class-D devices. Direction determined by MS_SV terminal.

Analog GND.

Current s etting resis tor for ramp generator.

Analog 5V Regulated output.

High-voltage analog power supply.

Bootstrap I /O for H-bridge A high-side FET.

Power ground for H-bridge A.

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Functional Block Diagram

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PAM8615

Absolute Maximum Ratings (@T

These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. All voltages are with respect to ground.

Parameter Rating Unit

Supply Voltage AVCC, PVCC -0.3 to +30 V

Logic Input Voltage:

SHDN, MUTE -0.3 to AVCC +0.3

DCV, MS_SV, SYNC 0 to +5.5

Analog Input Voltage:

IN-A, IN-B 0 to +5.5 V

Storage Temperature -65 to +150

Soldering Temperature 300, 5sec

PAM8615

Document number: DSxxxxx Rev. 1 - 1

= +25°C, unless otherwise specified.)

A

V

°C

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A Product Line o

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PAM8615

Recommended Operating Conditions (@T

= +25°C, unless otherwise specified.)

A

Parameter Rating Unit

Supply Voltage (VCC)

DCV Volume Control Pin 0 to 5

f

Oscillator Frequency (R

OSC

= 100kΩ)

OSC

TA – Operating Free-Air Temperature

Ambient Operating Temperature -20 to +85

Ambient Temperature Range -40 to +160

10 to 26

V

250 to 350 kHz

-40 to +85

°C

Junction Temperature Range -40 to +85

Thermal Information

Parameter Package Symbol Max Unit

Thermal Resistance (Junction to Ambient) TSSOP-24

θ

JA

Electrical Characteristics (@T

= +25°C, VCC = 24V, Gain = 20dB, RL = 4Ω, unless otherwise specified.)

A

Parameter Symbol Test Conditions Min Typ Max Units

Class-D Output Offset Voltage (measured differently) |VOS|

Quiescent Supply Current

Quiescent Supply Current in Mute Mode

Quiescent Supply Current in Shutdown Mode

Oscillator Frequency

Drain-Source On-State Resistance

I

CC

I

CC(MUTE)

I

CC(SD)

f

OSC

R

DS(ON)

Power Supply Rejection Ratio PSRR

Output Power at 1% THD+N

P

(SE)

O

Output Power at 10% THD+N

Output Power at 1% THD+N

(BTL)

P

O

Output Power at 10% THD+N

Total Harmonic Distortion + Noise THD+N

Output Integrated Noise Floor

Crosstalk

V

C

Signal-to-Noise Ratio SNR

V

= 0V, AV = 36dB

I

SHDN = 2V, MUTE = 0V, Input AC_GND, No load

MUTE = 2V, No load

SHDN = 0.5V, No load 5 20 µA

R

V

= 100kΩ

OSC

= 24V,IO = 1A, TA = 27°C

CC

V

= 23.5V to 24.5V

CC

= 24V, RL = 4Ω, f = 1kHz

V

CC

VCC = 24V, RL = 8Ω, f = 1kHz

V

= 24V, RL = 4Ω, f = 1kHz

CC

VCC = 24V, RL = 8Ω, f = 1kHz

= 24V, RL = 8Ω, f = 1kHz

V

CC

VCC = 12V, RL=8Ω, f = 1kHz

V

= 24V, RL = 8Ω, f = 1kHz

CC

VCC = 12V, RL = 8Ω, f = 1kHz

R

= 4Ω, f = 1kHz, Po = 10W

L

RL = 8Ω, f = 1kHz, Po = 5W

20Hz to 22kHz, A-weighted

N

filter, Gain = 20dB

PO = 1W, f = 1kHz, Gain = 20dB

S

Max output at THD+N<1%, f = 1kHz, Gain = 20dB

Thermal Trip Point 160 °C

Thermal Hystersis 40 °C

30 °C/W

10 65 mV

25 40 mA

323 kHz

220 mΩ

-60 dB

14

8.2

17.3

9.8

27

7

35

9

0.25%

0.15%

-67 dBV

-60 dB

86 dB

W

PAM8615

Document number: DSxxxxx Rev. 1 - 1

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