BL6212

BL6212
1.28 Watt Audio Power Amplifier
Features
‰
‰
‰
‰
‰
‰
‰
‰
‰
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Improved PSRR at 217 Hz & 1 KHz
62 dB
Power output at 5.0V, 1% THD+N, 8Ω
1.28 W (typ.)
Power output at 3.0V, 1% THD+N, 8Ω
440 mW (typ.)
Ultra low shutdown current
0.1 uA (typ.)
2.2V – 5.5V operation
Improved circuitry eliminates pop-click noise during turn-on and turn-off transitions
No output coupling capacitors, snubber networks or bootstrap capacitors required
Unity-gain stable
External gain configuration capability
Available in space-saving packages: MSOP8, 9 Bump WLCSP
General Description
The BL6212 is a Class-AB audio power amplifier designed for mobile phones and other portable
communication devices. It is capable of delivering 1.28 watts of continuous average power to an
8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.
The BL6212 was designed specifically to provide high quality output power with a minimal
amount of external components. It does not require output coupling capacitors or bootstrap
capacitors. And with ultra low shutdown current, the BL6212 is ideally suited for mobile phone
and other low voltage applications where minimal power consumption is a primary requirement.
With special pop-click eliminating circuit, the BL6212 provides perfect pop-click characteristic
during turn-on and turn-off transitions.
The BL6212 is unity-gain stable and can be configured by external gain-setting resistors.
Applications
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Wireless handsets
Portable electronic devices
PDAs, Handheld computers
Order Information
Part Number
Package
Shipping
BL6212MM
MSOP8
3000 pcs / Tape & Reel
BL6212CP
9 Bump WLCSP
3000 pcs / Tape & Reel
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BL6212
Pin Diagrams
Pin Description
No.
Pin Name
I/O
I
1
Description
Shout-down Logical Control, ‘0’ is active.
2
BP
I/O
3
INP
I
Positive Input
4
INN
I
Negative Input
5
Vout1
O
Negative BTL Output
6
VDD
I/O
Power Supply (2.2 – 5.5 V)
7
GND
I/O
Ground
8
Vout2
O
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Analog ground for inner OPAs. It’s about a half of VDD.
Positive BTL Output
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BL6212
Typical Application Circuit
FIGURE 1. BL6212 Typical Application Circuit
FIGURE 2. BL6212 Differential Amplifier Configuration
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BL6212
External Components Description
Components
Functional Description
Ri
Inverting input resistance which sets the closed-loop gain in conjunction with
Rf. This resistor also forms a high pass filter with Ci at fc = 1/(2πRi*Ci).
Ci
Input coupling capacitor which blocks the DC voltage at the amplifiers input
terminates. Also creates a high-pass filter with Ri at fc = 1/(2πRi*Ci).
Rf
Feedback resistance which sets the closed-loop gain in conjunction with Ri.
Cs
Supply bypass capacitor which provides power supply filtering.
Cb
Bypass pin capacitor which provides half-supply filtering. Refer to the section.
Absolute Maximum Ratings
Operating Ratings
Supply Voltage
-0.3V to 6V
Input Voltage
-0.3V to VDD+0.3V
Power Dissipation
See Dissipation Rating Table
ESD Susceptibility (Human body model)
4000V
Junction Temperature
-40℃ to +150℃
Storage Temperature
-65℃ to +150℃
Thermal Resistance
θJC(MSOP8)
56℃/W
θJA(MSOP8)
190℃/W
θJA(9-BUMP)
180℃/W
Temperature Range
Supply Voltage
-40℃≦TA≦85℃
2.2V≦VDD≦5.5V
NOTE: Absolute Maximum Ratings indicate limits
beond which damage to the device may occur.
Operating Rating indicate conditions for which the
device is functional, but do not guarantee specific
performance limits.
Electrical Characteristics
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified.
Limits apply for TA = 25℃.
‰
VDD = 5V
Symbol
Parameter
IDD
Quiescent Power Supply Current
ISD
Shutdown Current
Conditions
Spec
Min.
Typ.
Max.
Units
VIN = 0V,
8Ω Load
2.4
8
mA
VIN = 0V,
No Load
2.1
7
mA
VIN=0V, VSHD=GND, No Load
0.1
2
uA
VSDIH
Shutdown Voltage Input High
1.58
V
VSDIL
Shutdown Voltage Input Low
1.36
V
VOS
-50
Output Offset Voltage
THD+N Total Harmonic Distortion+Noise Po=0.5Wrms,
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f=1KHz,
6
0.04
50
mV
%
Total 10 Pages
BL6212
PO
Output Power
THD+N<=1%,
f=1KHz,
8Ω Load
Input terminated with 10Ω,
PSRR
Power Supply Rejection Ratio
VDDRIPPLE=0.2VP-P, f=217Hz
Input terminated with 10Ω,
VDDRIPPLE=0.2VP-P, f=1KHz
TWU
Wake-up time
ROUT
Resistor Output to GND
‰
0.9
1.28
W
55
60
dB
55
64
dB
100
ms
5.8
7.3
9.7
kΩ
VDD = 3V
Symbol
Parameter
IDD
Quiescent Power Supply Current
ISD
Shutdown Current
Spec
Conditions
Min.
Typ.
Max.
Units
VIN = 0V,
8Ω Load
1.9
7
mA
VIN = 0V,
No Load
1.7
6
mA
VIN=0V, VSHD=GND, No Load
0.1
2
uA
VSDIH
Shutdown Voltage Input High
1.27
V
VSDIL
Shutdown Voltage Input Low
1.08
V
VOS
-50
Output Offset Voltage
THD+N Total Harmonic Distortion+Noise Po=0.25Wrms,
PO
Output Power
f=1KHz,
THD+N<=1%,
PSRR
Power Supply Rejection Ratio
Input terminated with 10Ω,
VDDRIPPLE=0.2VP-P, f=1KHz
TWU
Wake-up time
ROUT
Resistor Output to GND
‰
mV
%
440
mW
55
62
dB
55
68
dB
75
ms
8Ω Load
VDDRIPPLE=0.2VP-P, f=217Hz
50
0.06
f=1KHz,
Input terminated with 10Ω,
6
5.8
7.3
9.7
kΩ
VDD = 2.6V
Symbol
Parameter
IDD
Quiescent Power Supply Current
ISD
Shutdown Current
Spec
Conditions
Min.
Typ.
Max.
Units
VIN = 0V,
8Ω Load
1.7
mA
VIN = 0V,
No Load
1.47
mA
VIN=0V, VSHD=GND, No Load
0.1
uA
VSDIH
Shutdown Voltage Input High
1.20
V
VSDIL
Shutdown Voltage Input Low
1.01
V
VOS
-50
Output Offset Voltage
THD+N Total Harmonic Distortion+Noise Po=0.15Wrms,
PO
Output Power
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THD+N<=1%,
-5-
f=1KHz,
f=1KHz,
4
50
mV
0.08
%
320
mW
Total 10 Pages
BL6212
8Ω Load
Input terminated with 10Ω,
PSRR
Power Supply Rejection Ratio
VDDRIPPLE=0.2VP-P, f=217Hz
Input terminated with 10Ω,
VDDRIPPLE=0.2VP-P, f=1KHz
TWU
Wake-up time
ROUT
Resistor Output to GND
51
56
dB
51
59
dB
70
ms
5.8
7.3
9.7
kΩ
Typical Performance Characteristics
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BL6212
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BL6212
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BL6212
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BL6212
Package Dimensions
MSOP8
All dimension values are in millimeter.
9 Bump WLCSP Dimensions (mm)
REF
MIN
TYP
MAX
A1
0.215
0.235
0.255
A2
0.355
0.380
0.405
A3
0.020
0.035
0.050
D
1.485
1.500
1.515
D1
E
0.500
1.485
E1
b
CCC
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1.500
1.515
0.500
0.300
0.320
0.340
0.080
Total 10 Pages