Small-sized Class-D Speaker Amplifiers
Analog Input
Monaural Class-D Speaker Amplifier
BD5461GUL
No.10101EAT02
●Description
BD5461GUL is a low voltage drive class-D monaural speaker amplifier that was developed for cellular phones, mobile
audio products and the others.LC-filter of speaker output is unnecessary, and the number of external components is three.
It is suitable for the application of battery drive because of high efficiency and low power consumption.
Also, stand-by current is 0µA (typ.), and fast transitions from standby to active with little pop noise. It is suitable for
applications that switch repeatedly between stand-by and active.
●Features
1) No LC filter required
2) Only three external components
3) High power 2.5W/4Ω/BTL (VDD=5V, RL=4Ω, THD+N=10%, typ.)
4) High power 0.85W/8Ω/BTL (VDD=3.6V, RL=8Ω, THD+N=10%, typ.)
5) Gain 12dB
6) Analog differential input / PWM digital output
7) Pop noise suppression circuitry
8) Built-in standby function
9) Protection circuitry (Short protection [Auto recover without power cycling], Thermal shutdown, Under voltage lockout)
10) Very small package 9-Bump WL-CSP (1.6*1.6*0.55mmMAX)
●Applications
Mobile phones, PDA, Mobile electronics applications, Note-book PC etc.
●Absolute
Maximum Ratings(Ta=25℃)
Parameter
Power Supply Voltage
Power Dissipation
Storage Temperature Range
STBY Terminal Input Range
IN+, IN- Terminal Input Range
Symbol
VDD
Pd
Tstg
Vstby
Vin
Ratings
7.0
690
*1
-55
½
+150
-0.1½VDD+0.1
-0.1½VDD+0.1
Unit
V
mW
℃
V
V
*1 When mounted on a 50 mm×58mm Rohm standard board, reduce by 5.52 mW/°C above Ta = +25 °C.
●Operating
Conditions
Parameter
Power Supply Voltage
Temperature Range
Symbol
VDD
Topr
Ratings
+2.5
½
+5.5
-40
½
+85
Unit
V
℃
※
This product is not designed for protection against radioactive rays
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/16
2010.06 - Rev.A
BD5461GUL
Technical Note
●Electric
Characteristics
(Unless otherwise specified, Ta=25℃, VDD=3.6V, f=1kHz, RL=8Ω, AC item=LC Filter ; L=22µH, C=1µF )
Rating
Parameter
Symbol
Unit
Conditions
MIN.
TYP.
MAX.
Circuit current (No signal)
Circuit current (Standby)
Output power 1
Output power 2
Voltage gain
Power Supply Rejection Ratio
Output offset voltage
Switching Frequency
Start-up time
Standby input Voltage
Standby input current
High-level
Low-level
High-level
Low-level
I
CC
I
STBY
P
O1
P
O2
G
V
P
SRR
ΔVo
fosc
Ton
V
STBYH
V
STBYL
I
STBYH
I
STBYL
―
―
450
550
11.4
45
-25
175
0.39
1.4
0
6
-5
2.0
0.1
680
850
11.9
53
0
250
0.51
―
―
12
0
4.0
2
―
―
12.4
―
+25
325
0.73
VDD
0.4
18
5
mA
μA
mW
mW
dB
dB
mV
kHz
msec
V
V
μA
μA
Active mode
Standby mode
V
STBY
=3.6V
V
STBY
=0V
Active mode, No load
Standby mode
BTL, f=1kHz, THD+N=1% *1
BTL, f=1kHz, THD+N=10% *1
BTL
BTL, f=1kHz, Vripple=0.1Vpp *2
Vin=0V, BTL
BTL=Bridged Tied Load (Voltage between A3-C3.), *1;B.W.=400½30kHz,*2;DIN AUDIO
●Measurement
Circuit Diagram
A
Vripple
10μ
VDD
VDD B1
B2 PVDD
V
STBY
A
0.1μ
Vin
STBY
C2
Bias
OSC
OUT-
A3
22μH
1μ
V
8
V
SE
IN+
A1
PWM
H-
Bridge
V
V
BTL
Vin
0.1μ
IN-
C1
OUT+
C3
22μH
1μ
V
V
SE
GND A2
B3 PGND
●Active
/ Standby Control
STBY Pin(C2pin)
Mode
Active
Standby
Pin level
H
L
Conditions
IC active
IC shutdown
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
2/16
2010.06 - Rev.A
stm32/stm8
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