Small-sized Class-D Speaker Amplifiers
Analog Input Monaural Class-D Speaker Amplifier
BD5468GUL
No.10101EAT08
●Description
BD5468GUL 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 it’s suitable for battery drive application. The current consumption during shutdown when lowered to 0.01μA(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(1.7×1.7×0.55mmMax.) 4) BD5460/61GUL (No ALC Function, Gain Fixed Goods) Pin Compatible Specs
BD5465/66/67GUL (ALC Function, Gain Fixed Goods) Pin Compatible Specs 5) Maximum Gain: 13dB (Typ.) [during ALC operation, 13~-2dB@1dB Step]
6) ALC high speed release (recovery) time: 4ms/1dB(Typ.) 7) Limit output power : 0.7W (Typ.) [VDD=4.2V, RL=8Ω, THD+N≦1%]
: 0.5W (Typ.) [VDD=3.6V, RL=8Ω, THD+N≦1%]
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 = 0.01μA (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
Power Supply Voltage Power Dissipation
VDDmax PVDDmax
Pd
7.0 690※
Storage Temperature Range
Tstg -55 ~ +150
SDNB Pin Input Range
VSDNB
-0.3~VDD+0.3
IN+, IN- Pin Input Range
VIN -0.3~VDD+0.3
※ In case Ta=+25℃ or more, 5.52 mW decrease per 1℃
When mounting Rohm Typical Board 50.0mm×58.0mm (Material :Glass Epoxy)
Unit
V
mW ℃ V V
●Operation Range
Parameter
Symbol
Temperature
Topr
Power Supply Voltage
VDD PVDD
Common Mode Input Voltage Range
VIC
◎ This product is not designed for protection against radioactive rays.
Range -40 ~ +85 +2.5 ~ +5.5 +0.5 ~ VDD-0.8
Unit ℃
V V
www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved.
1/19
2010.09 - Rev.A
BD5468GUL
Technical Note
●Electrical Characteristic (Ta=+25℃, VDD=+3.6V, Unless specified otherwise)
Parameter <All Device> Circuit current (no signal)
Symbol
Min.
Limits Typ.
Max.
ICC ―
3
6
Circuit current (shutdown) <Audio Feature> Limit output power
Total harmonic distortion
ISDN ― 0.01 2
PO THD+N
0.035 ×VDD2
―
0.044 ×VDD2
0.2
0.055 ×VDD2
1
Maximum Gain ALC Limit level ALC Release level Switching frequency
GMAX VLIM VREL fOSC
12
1.5 ×VDD 1.19 ×VDD
150
13
1.68 ×VDD 1.34 ×VDD
250
14
1.89 ×VDD
1.5 ×VDD
350
Unit Conditions
mA
IC Active, No Load VSDNB =VDD
μA
IC Shutdown VSDNB =GND
W
BTL, f=1kHz, RL=8Ω THD+N≦1% , *1
%
BTL, fin=1kHz, RL=8Ω PO =0.3W, *1
dB BTL, *1
Vpp BTL, *1
Vpp BTL, *1
kHz
Start-up time
TON 0.73 1.02 1.71 msec
Audio input resistance <Control Terminal>
SDNB terminal Threshold voltage
Ri 36
H VSDNBH 1.4
L VSDNBL
0
55 74 kΩ Gain=13dB
―
VDD
V IC Active
― 0.4 V IC Shutdown
SDNB terminal Inflow Current
H ISDBNH
12
24
36 μA VSDNB =3.6V
L ISDNBL
-5
―
5 μA VSDNB =0V
*1 Filter bandwidth for measurement :400~30kHz, LC filter for AC measurement :L=22μH / C=1μF, BTL :Voltage between A3,C3
●Shutdown control Control terminal SDNB H L
Conditions
IC operation (active) IC stop (shutdown)
●ALC Parameter
Attack Time (Typ.) ~1ms/1dB @ fin=100Hz ~0.5ms/1dB @ fin=1kHz ~0.05ms/1dB @ fin=10kHz
ALC Parameter Release Time(Typ.)
4ms/1dB @ fin=100~10kHz
Gain Switch Step (Typ.) ±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 doesn’t correspond to noise of impulse.
www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved.
2/19
2010.09 - Rev.A
BD5468GUL
Technical Note
●Measurement Circuit Diagram
■In case LC filter is not used
+Battery
Shutdown Signal
H : IC Active L : IC Shutdown
SDNB C2
VDD B1
C3 10uF
B2 PVDD
150k (Typ .)
Shutdown Control
BIAS OSC
0. 1uF C2
IN + A1
Ri
0. 1uF C1
IN -
C1
Ri
ALC Rf
PWM
HBridge
Rf
GND A 2
B3 PGND
OUT + C3
OUT A3
BTL
Measurement Instrum.