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Analog Input Monaural Class-D Speaker Amplifier - · PDF fileAnalog Input Monaural Class-D Speaker Amplifier BD5466GUL Description BD5466GUL is a monaural Class-D speaker amplifier

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1/19 www.rohm.com 2010.09 - Rev.A

2010 ROHM Co., Ltd. All rights reserved.

Small-sized Class-D Speaker Amplifiers

Analog Input Monaural Class-D Speaker Amplifier BD5466GUL

Description

BD5466GUL is a monaural Class-D speaker amplifier that contained ALC function for mobile phone, portable type electronic devices etc. LC filter of speaker output is not needed, can form monaural speaker amplifier. with 3 external parts. ALC, short for Automatic Level Control, is a function that automatically adjusts up to the level of suppression of distortion (clip) of output wave form during excessive input. The time until the limit release operation of output level is called the release time (or recovery time). This IC adopts high-speed release time (4ms/1dB Typ.) and suits the application which repeats big volume in the short time such as the camera shutter sound. Through Class-D operation, efficiency is high low power consumption, that is why its suitable for battery drive application. The current consumption during shutdown when lowered to 0.01A(Typ.), from the shutdown to the operation time is early and at the same time pop sound is few that is why its also suitable in repeating active and shutdown.

Feature

1) Contains Digital ALC (Automatic Level Control) Function 2) External Parts: 3points 3) Ultra slim type package: 9pin WL-CSP(1.71.70.55mmMax.) 4) BD5460/61GUL (No ALC Function, Gain Fixed Goods) Pin Compatible Specs BD5465/67/68GUL (ALC Function, Gain Fixed Goods) Pin Compatible Specs 5) Maximum Gain: 18dB(Typ.) [during ALC operation, [email protected] Step] 6) ALC high speed release(recovery) time: 4ms/1dB(Typ.) 7) Limit output power : 0.7W (Typ.) [VDD=4.2V, RL=8, THD+N1%] : 0.5W (Typ.) [VDD=3.6V, RL=8, THD+N1%] 8) Audio Analog Input (corresponds to single-end input / differential input) 9) Output LC filter free 10) Pop noise suppression circuit 11) Shutdown Function (use as mute at the same time) [low shutdown current = 0.01A (Typ.)] 12) Contains protection circuit: output short, thermal shutdown, under voltage lockout (UVLO)

Applications

Mobile phone, Portable audio device, PND, DSC, Note-PC etc. Absolute Maximum Rating(Ta=+25)

Parameter Symbol Ratings Unit

Power Supply Voltage VDDmax PVDDmax 7.0 V

Power Dissipation Pd 690 mW Storage Temperature Range Tstg -55 +150 SDNB Pin Input Range VSDNB -0.3VDD+0.3 V IN+, IN- Pin Input Range VIN -0.3VDD+0.3 V In case Ta=+25 or more, 5.52 mW decrease per 1 When mounting Rohm Typical Board 50.0mm58.0mm (Material: Glass Epoxy)

Operation Range

Parameter Symbol Range Unit Temperature Topr -40 +85

Power Supply Voltage VDD PVDD +2.5 +5.5 V

Common Mode Input Voltage Range VIC +0.5 VDD-0.8 V This product is not designed for protection against radioactive rays.

No.10101EAT06

Technical Note

2/19

BD5466GUL

www.rohm.com 2010.09 - Rev.A 2010 ROHM Co., Ltd. All rights reserved.

Electrical Characteristic (Ta=+25, VDD=+3.6V, Unless specified otherwise)

Parameter Symbol Limits

Unit Conditions Min. Typ. Max.

All Device

Circuit current (no signal) ICC 3 6 mA IC Active, No Load VSDNB =VDD

Circuit current (shutdown) ISDN 0.01 2 A IC Shutdown VSDNB =GND

Audio Feature

Limit output power PO 0.035

VDD20.044

VDD220.055

VDD2 W BTL, f=1kHz, RL=8 THD+N1% , *1

Total harmonic distortion THD+N 0.2 1 % BTL, fin=1kHz, RL=8 PO =0.3W , *1

Maximum Gain GMAX 17 18 19 dB BTL, *1

ALC Limit level VLIM 1.5

VDD 1.68

VDD 1.89

VDD Vpp BTL, *1

ALC Release level VREL 1.19

VDD 1.34

VDD 1.5

VDD Vpp BTL, *1

Switching frequency fOSC 150 250 350 kHz

Start-up time TON 0.73 1.02 1.71 msec

Audio input resistance Ri 22 33.5 45 k Gain=18dB

Control Terminal

SDNB terminal Threshold voltage

H VSDNBH 1.4 VDD V IC Active

L VSDNBL 0 0.4 V IC Shutdown

SDNB terminal Inflow Current

H ISDBNH 12 24 36 A VSDNB =3.6V

L ISDNBL -5 5 A VSDNB =0V

*1 Filter bandwidth for measurement: 40030kHz, LC filter for AC measurement: L=22H / C=1F, BTL: Voltage between A3,C3

Shutdown control Control terminal

Conditions SDNB

H IC operation (active) L IC stop (shutdown)

ALC Parameter

ALC Parameter Attack Time (Typ.) Release Time(Typ.) Gain Switch Step (Typ.)

1ms/1dB @ fin=100Hz 0.5ms/1dB @ fin=1kHz

0.05ms/1dB @ fin=10kHz

4ms/1dB @ fin=10010kHz 1dB

The gain switch timing during ALC operation occurs at zero cross point of audio output voltage. For that, attack time, release time will change at input frequency fin. ALC Parameter is fixed. ALC operation doesnt correspond to noise of impulse.

Technical Note

3/19

BD5466GUL

www.rohm.com 2010.09 - Rev.A 2010 ROHM Co., Ltd. All rights reserved.

Measurement Circuit Diagram

In case LC filter is not used

In case LC filter is used

Audio characteristics can be measured to insert LC filter between output pin and speaker load, if you dont have measurement equipment for switching amplifier, like AUX-0025, Audio Precision. Arrange the LC filter directly close to output pin. In case of L=22H, C=1F, cut off frequency becomes:

For Inductor L, please use huge current type. (Reference)TDK : SLF12575T-220M4R0

Shutdown Signal C 2

SDNB

B1 B2VDD PVDD

A1

C 1

C3

A3

A2 B3 PGNDGND

C310uF

H : IC Active L : IC Shutdown

0 .1 uF

0 .1 uF

+Battery

IN+

IN -

OUT +

OUT -

150 k ( Typ.)

BIAS

OSC

PWM H-Bridge

ShutdownControl

Ri

Ri

Rf

Rf

ALC

LPFAP AUX-0025

AudioPrecision

(AP )

Measument Instrument BTL

C 2

C 1

Audio Precision (AP )

Shutdown Signal C 2

SDNB

B1 B2VDD PVDD

A1

C 1

C3

A2 B3 PGNDGND

C310uF

H: IC Active L: IC Shutdown

0. 1uF

0. 1uF

+Battery

IN+

IN-

150k ( Typ.)

BIAS

OSC

PWM H-Bridge

ShutdownControl

Ri

Ri

Rf

Rf

ALC

A3

C 2

C 1BTL

1uF 1uF

22uH

22uH

34kHzF1H 222

1LC2

1fc

Technical Note

4/19

BD5466GUL

www.rohm.com 2010.09 - Rev.A 2010 ROHM Co., Ltd. All rights reserved.

(Unit : mm)

5466

LOT No.

External Dimension Diagram Block Diagram Pin Arrangement (Bottom View) Pin Explanation

Pin No. Pin Name Explanation A1 IN+ Audio differential input + terminal A2 GND GND terminal (signal) A3 OUT- Class-D BTL output - terminal B1 VDD VDD terminal (signal) B2 PVDD VDD terminal (power) B3 PGND GND terminal (power) C1 IN- Audio differential input - terminal C2 SDNB Shutdown control terminal C3 OUT+ Class-D BTL output + terminal

9pin WL-CSP(VCSP50L1) [ 1.71.70.55mm Max, 0.5mm Pitch ]

Top View Bottom View

Side View

IN+ GND OUT-

VDD PVDD PGND

IN- SDNB OUT+

A1 A2 A3

B1 B2 B3

C1 C2 C3

Index Post

C2

SDNB

B1 B2VDD PVDD

A1

C1

IN+

IN-

C3

A3

OUT+

OUT-

A2 B3 PGNDGND

150k(Typ.)

BIAS

OSC

PWM H-Bridge

ShutdownControl

Ri

Ri

Rf

Rf

ALC

Technical Note

5/19

BD5466GUL

www.rohm.com 2010.09 - Rev.A 2010 ROHM Co., Ltd. All rights reserved.

Application circuit example

SHORT the power supply pin VDD (B1), PVDD (B2) at board pattern, then use singleness power supply.

C2

SDNB

B 1 B 2VDD PVDD

A 1

C1

C3

A 3

A2 B3 PGNDGND

C310 uF

H : IC Active L : IC Shutdown

Shutdown Signal

+Battery

IN+

IN-

OUT +

OUT -

150k( Typ.)

BIAS

OSC

PWM H-Bridge

ShutdownControl

Ri

Ri

Rf

Rf

ALC

Differential Input

Audio Input +

Audio Input -

Signal VDD

Singleness power supply(+2.5+5.5V)

Power VDD

Power GND Signal GND

Class-D BTL Output

Shutdown Control

Audio Differential Input

C2

SDNB

B 1 B2VDD PVDD

A1

C1

C3

A 3

A2 B 3 PGNDGND

C310 uF

H : IC Active L: IC Shutdown

0 .1 uF

0 .1 uF

Shutdown Signal

+Battery

IN+

IN-

OUT +

OUT -

150k( Typ.)

BIAS

OSC

PWM H-Bridge

ShutdownControl

Ri

Ri

Rf

Rf

ALC

Differential Input

Audio Input+

Audio Input-

Class-D BTL Output

Power VDD Signal VDD

Singleness power supply (+2.5+5.5V)

Shutdown Control

Signal GND Power GND

Audio Differential Input

Fig1. Differential Input(With Input Coupling Capacitor)

Fig2. Differential Input(Without Input Coupling Capa

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