BD88220GUL [ROHM]
Coupling Capacitorless Headphone Amplifiers; 耦合电容的耳机放大器
| 型号： | BD88220GUL |
| 厂家： | 
ROHM |
| 描述： | Coupling Capacitorless Headphone Amplifiers |
| 文件： | 总26页 (文件大小：647K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Headphone Amplifiers
Coupling Capacitorless
Headphone Amplifiers
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
No.11102EAT05
●Description
BD88xxxGUL is output coupling capacitorless headphone amplifier. This IC has a negative voltage generator of regulated
type built-in and generates the direct regulated negative voltage from the supply voltage. It is possible to drive headphones
in a ground standard with both voltage of the positive voltage (+2.4V) and the negative voltage (-2.4V). Therefore a
large-capacity output coupling capacitor becomes needless and can reduce a cost, a board area, and the height of the part.
In addition, there is not the signal decrement by the low range to happen by output coupling capacitor and output load
impedance and can output a rich low tone.
And, the function “Virtual ground” is embedded. Noise between IC and Headphone jack can be canceled by using “Virtual
ground” function.
●Features
1) 2.4V to 5.5V Single-Supply Operation
2) No Bulky DC-Blocking Capacitors Required
3) No Degradation of Low-Frequency Response Due to Output Capacitors
4) Virtual Ground-Referenced Outputs
5) Gain setting
BD88200GUL: Variable gain with external resistors
BD88210GUL: -1.0V/V
BD88215GUL: -1.5V/V
BD88220GUL: -2.0V/V
6) Low THD+N
7) Low Supply Current
8) Integrated Negative Power Supply
9) Integrated Short-Circuit and Thermal-Overload Protection
10) Small package
VCSP50L2 (2.1mm x 2.1mm)
●Applications
Mobile Phones, Smart Phones, PDAs, Portable Audio Players, PCs, TVs, Digital Cameras, Digital Video Cameras,
Electronic Dictionaries, Voice Recorders, Bluetooth Head-sets, etc
●Line up
Supply Supply
Voltage Current
Maximum
Output Power
[mW]
Noise
Voltage
[µVrms]
Gain
[V/V]
THD+N
[%]
PSRR
[dB]
Type
Package
[V]
[mA]
Variable gain
with external
resister
BD88200GUL
BD88210GUL
BD88215GUL
BD88220GUL
-1.0
-1.5
-2.0
80
0.006
2.0
-80
(f=217Hz)
VCSP50L2
(2.1mm x 2.1mm)
2.4～5.5 (No signal)
10
(VDD=3.3V,RL=16Ω (VDD=3.3V,RL=16Ω
THD+N≦1%,f=1kHz) Po=10mW,f=1kHz)
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
1/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Absolute maximum ratings
Parameter
SGND to PGND voltage
Symbol
VGG
VDD
VSS
Ratings
0.0
Unit
V
SVDD to PVDD voltage
SVSS to PVSS voltage
-0.3～0.3
V
0.0
V
SGND or PGND to SVDD, PVDD voltage
SVSS, PVSS to SGND or PGND voltage
SGND to IN_- voltage
VDG
VSG
VIN
-0.3～6.0
V
-3.5～0.3
V
(SVSS-0.3)～2.8
(SVSS-0.3)～2.8
(PGND-0.3)～(PVDD+0.3)
(PVSS-0.3)～(PGND+0.3)
(SGND-0.3)～(SVDD+0.3)
-10～10
V
SGND to OUT_- voltage
PGND to C1P- voltage
VOUT
VC1P
VC1N
VSH
IIN
V
V
PGND to C1N- voltage
V
SGND to SHDN_B- voltage
Input current
V
mA
mW
℃
Power Dissipation
PD
1350 *
Storage Temperature Range
-55～150
TSTG
*
In operating over 25 ℃, de-rate the value to 10.8mW/℃. This value is for mounted on the application board
(Grass-epoxy, size: 40mm x 60mm, H=1.6mm, Top Copper area = 79.9%, Bottom Copper area = 80.2%).
●Operating conditions
Parameter
Ratings
Typ.
Symbol
Unit
Min.
2.4
Max.
5.5
Supply Voltage Range
VSVDD,VPVDD
TOPR
-
-
V
Operating Temperature Range
-40
+85
℃
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
2/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Electrical characteristics
Unless otherwise specified, Ta=25℃, SVDD=PVDD=3.3V, SGND=PGND=0V, SHDNB=SVDD, C1=C2=2.2µF,
RL=No Load, Ri=Rf=10kΩ
Limits
Parameter
Supply Current
Symbol
Unit
Conditions
Min.
Typ.
Max.
Shutdown Supply Current
IST
-
-
-
0.1
1.3
2.0
2
-
µA
mA
mA
SHDNLB=SHDNRB=L
(SHDNLB,SHDNRB)=(H,L) or (L,H),
No signal
IDD1
IDD2
Quiescent Supply Current
SHDNLB=SHDNRB=H,
No signal
7.4
SHDN_B Terminal
H Level Input Voltage
VIH
VIL
1.95
-
-
-
-
V
V
L Level Input Voltage
-
-
0.70
±1
Input Leak Current
ILEAK
µA
Headphone Amplifier
Shutdown to Full Operation
tSON
VIS
-
80
±0.5
60
-
µs
mV
mW
mW
%
SHDNLB=SHDNRB=L→H
Offset Voltage
-
±5.0
RL=32Ω, THD+N≦-40dB, f=1kHz,
20kHz LPF, for Single Channel
30
-
Maximum Output Power
POUT
RL=16Ω, THD+N≦-40dB, f=1kHz,
20kHz LPF, for Single Channel
40
80
-
RL=32Ω, POUT=10mW, f=1kHz,
20kHz LPF
-
0.008
0.006
14
0.056
Total Harmonic Distortion
+ Noise
THD+N
ZIN
RL=16Ω, POUT=10mW, f=1kHz,
20kHz LPF
-
0.100
%
SHDNLB=SHDNRB=H
In BD88200GUL, ZIN = Ri
Input Impedance
BD88200GUL
10
19
kΩ
-
-1.00
-1.00
-1.50
-2.00
1
-
BD88210GUL
Gain
-1.05
-0.95
In BD88200GUL, Gain is variable
by the external resister of Ri and Rf.
AV
V/V
%
BD88215GUL
-1.55
-1.45
BD88220GUL
Gain match
-2.06
-1.94
ΔAV
VN
-
-
Noise
-
10
-
µVrms 20kHz LPF + JIS-A
Slew Rate
SR
-
0.15
200
-90
-
V/µs
pF
Maximum Capacitive Load
Crosstalk
CL
-
-
RL=32Ω, f=1kHz, VOUT=200mVP-P
,
CT
-
-
dB
dB
kHz
℃
1kHz BPF
Power Supply
Rejection Ratio
f=217Hz, 100mVP-P‐ripple,
217Hz BPF
PSRR
fOSC
TSD
THYS
-
-80
-
Charge-Pump
Oscillator Frequency
200
300
145
5
430
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
-
-
-
-
℃
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
3/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Electrical characteristic curves – General Items (Reference data)
Unless otherwise specified, Ta=25℃, SGND=PGND=0V, SHDNLB=SHDNRB=SVDD, C1=C2=2.2µF,
Input coupling capacitor=1µF, RL=No Load
* In BD88200GUL the input resister(Ri)=10kΩ, feedback resister(Rf)=10kΩ.
4.0
3.0
2.0
1.0
0.0
4.0
3.0
2.0
1.0
0.0
1u
SHDNLB=0V
SHDNRB=0V
SHDNLB=VDD
SHDNLB=VDD
SHDNRB=0V
* This caracteristics has
hysteresis (40mV typ) by
UVLO.
SHDNRB=VDD
* This caracteristics has
hysteresis (40mV typ) by
UVLO.
100n
10n
1n
0.1n
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Supply Voltage [V]
Supply Voltage [V]
Supply Voltage [V]
Fig.2 Monaural Operating
Current vs. Supply Voltage
Fig.3 Stereo Operating
Current vs. Supply voltage
Fig.1 Standby Current vs.
Supply Voltage
120
100
80
60
40
20
0
0
-0.5
-1
200
180
160
140
120
100
80
RL=16 , in phase
Ω
SHDNLB=SHDNRB
=L->H
VSS 90% Setup time
No Load
SHDNLB=VDD
SHDNRB=VDD
No Load
RL=16 , out of phase
Ω
-1.5
-2
RL=32 , in phase
Ω
RL=32 , out of phase
Ω
60
THD+N -40dB
20kHz LPF
Stereo
≦
40
-2.5
-3
20
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Supply Voltage [V]
Supply Voltage [V]
Fig.6 Maximum power vs.
Supply Voltage
Supply Voltage [V]
Fig.4 Negative Voltage vs.
Supply Voltage
Fig.5 Setup time vs.
Supply Voltage
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
VDD=3.3V
Ripple = 100mVp-p
BPF
VDD=5.5V
Ripple = 100mVp-p
BPF
VDD=2.4V
Ripple = 100mVp-p
BPF
10
100
1k
10k
100k
10
100
1k
10k
100k
10
100
1k
10k
100k
Frequency [Hz]
Frequency [Hz]
Frequency [Hz]
Fig.9 PSRR vs. Frequency
(VDD=5.5V)
Fig.8 PSRR vs. Frequency
(VDD=3.3V)
Fig.7 PSRR vs. Frequency
(VDD=2.4V)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
VDD=3.3V
VOUT = 200mVp-p
VDD=5.5V
VOUT = 200mVp-p
VDD=2.4V
VOUT = 200mVp-p
RL=32
BPF
RL=32
BPF
Ω
Ω
RL=32
BPF
Ω
10
100
1k
10k
100k
10
100
1k
10k
100k
10
100
1k
10k
100k
Frequency [Hz]
Frequency [Hz]
Frequency [Hz]
Fig.12 Crosstalk vs.
Frequency (VDD=5.5V)
Fig.11 Crosstalk vs.
Frequency (VDD=3.3V)
Fig.10 Crosstalk vs.
Frequency (VDD=2.4V)
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
4/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Electrical characteristic curves – BD88215GUL (Reference data)
VDD=2.4V
f=1kHz
BPF
VDD=3.3V
f=1kHz
BPF
VDD=5.5V
f=1kHz
BPF
0
-20
0
-20
0
-20
RL=32
RL=32
RL=32
Ω
Ω
Ω
-40
-40
-40
RL=16
RL=16
RL=16
Ω
Ω
Ω
-60
-60
-60
-80
-80
-80
-100
-100
-120
-100
-120
-120
-120 -100 -80
-60
-40
-20
0
-120 -100 -80
-60
-40
-20
0
-120 -100 -80
-60
-40
-20
0
Input Voltage [dBV]
Input Voltage [dBV]
Input Voltage [dBV]
Fig.15 Output Voltage vs.
Input Voltage (VDD=5.5V)
Fig.13 Output Voltage vs.
Input Voltage (VDD=2.4V)
Fig.14 Output Voltage vs.
Input Voltage (VDD=3.3V)
10
8
10
8
10
8
RL=16
RL=16
Ω
RL=16
Ω
6
Ω
6
6
4
4
4
2
2
2
RL=32
RL=32
Ω
RL=32
Ω
Ω
0
0
0
-2
-4
-6
-8
-10
-2
-4
-6
-8
-10
-2
-4
-6
-8
-10
VDD=2.4V
Po=10mW
VDD=3.3V
Po=10mW
VDD=5.5V
Po=10mW
RL=16
RL=16
Ω
RL=16
Ω
Ω
Input coupling
capacitor = 1.0uF
Input coupling
capacitor = 1.0uF
Input coupling
capacitor = 1.0uF
10
100
1k
10k
100k
10
100
1k
10k
100k
10
100
1k
10k
100k
Frequency [Hz]
Frequency [Hz]
Frequency [Hz]
Fig.16 Gain vs. Frequency
(VDD=2.4V)
Fig.17 Gain vs. Frequency
(VDD=3.3V)
Fig.18 Gain vs. Frequency
(VDD=5.5V)
100
10
100
10
100
10
1
1
1
In phase
In phase
In phase
0.1
0.1
0.1
VDD=2.4V
20kHz-LPF
f=1kHz
VDD=5.5V
20kHz-LPF
f=1kHz
VDD=3.3V
20kHz-LPF
f=1kHz
0.01
0.001
0.01
0.001
0.01
0.001
Stereo
Stereo
Stereo
Out of phase
Out of phase
Out of phase
RL=16
RL=16
Ω
RL=16
Ω
Ω
1n
100n
10u
1m
100m
1n
100n
10u
1m
100m
1n
100n
10u
1m
100m
Output Power [W]
Output Power [W]
Output Power [W]
Fig.20 THD+N vs. Output
Power (VDD=3.3V, RL=16Ω)
Fig.21 THD+N vs. Output
Power (VDD=5.5V, RL=16Ω)
Fig.19 THD+N vs. Output
Power (VDD=2.4V, RL=16Ω)
100
100
100
10
1
10
1
10
1
In phase
In phase
In phase
0.1
0.1
0.1
VDD=2.4V
20kHz-LPF
f=1kHz
VDD=3.3V
20kHz-LPF
f=1kHz
VDD=5.5V
20kHz-LPF
f=1kHz
0.01
0.001
0.01
0.001
0.01
0.001
Stereo
Stereo
Stereo
Out of phase
Out of phase
Out of phase
RL=32
RL=32
RL=32
Ω
Ω
Ω
1n
100n
10u
1m
100m
1n
100n
10u
1m
100m
1n
100n
10u
1m
100m
Output Power [W]
Output Power [W]
Output Power [W]
Fig.24 THD+N vs. Output
Fig.22 THD+N vs. Output
Fig.23 THD+N vs. Output
Power (VDD=5.5V, RL=32Ω)
Power (VDD=2.4V, RL=32Ω)
Power (VDD=3.3V, RL=32Ω)
www.rohm.com
2011.03 – Rev. A
5/25
© 2011 ROHM Co., Ltd. All rights reserved.
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Electrical characteristic curves – BD88215GUL (Reference data) – Continued
100
100
10
100
VDD=3.3V
RL=16Ω
20kHz-LPF
Stereo (in phase)
VDD=5.5V
RL=16Ω
20kHz-LPF
VDD=2.4V
RL=16
20kHz-LPF
Ω
10
1
10
1
Stereo (in phase)
Stereo (in phase)
1
Po=0.1mW
Po=0.1mW
Po=0.1mW
Po=1mW
Po=1mW
Po=1mW
0.1
0.1
0.1
0.01
0.001
0.01
0.001
0.01
0.001
Po=10mW
10k
Po=10mW
10k
Po=10mW
10k
10
100
1k
100k
10
100
1k
100k
10
100
1k
100k
Frequency [Hz]
Frequency [Hz]
Frequency [Hz]
Fig. 26 THD+N vs. Frequency
Fig. 27 THD+N vs. Frequency
Fig.25 THD+N vs. Frequency
(VDD=3.3V, RL=16Ω)
(VDD=5.5V, RL=16Ω)
(VDD=2.4V, RL=16Ω)
100
100
100
VDD=3.3V
RL=32Ω
20kHz-LPF
Stereo (in phase)
VDD=5.5V
RL=32Ω
20kHz-LPF
Stereo (in phase)
VDD=2.4V
RL=32
20kHz-LPF
Ω
10
1
10
1
10
1
Stereo (in phase)
Po=0.1mW
Po=0.1mW
Po=0.1mW
Po=10mW
Po=10mW
Po=10mW
0.1
0.1
0.1
0.01
0.001
0.01
0.001
0.01
0.001
Po=1mW
10k
Po=1mW
10k
Po=1mW
10k
10
100
1k
100k
10
100
1k
100k
10
100
1k
100k
Frequency [Hz]
Frequency [Hz]
Frequency [Hz]
Fig. 28 THD+N vs. Frequency
Fig. 29 THD+N vs. Frequency
Fig. 30 THD+N vs. Frequency
(VDD=2.4V, RL=32Ω)
(VDD=3.3V, RL=32Ω)
(VDD=5.5V, RL=32Ω)
0
0
0
VDD=3.3V
Input connect
VDD=5.5V
Input connect
VDD=2.4V
Input connect
-20
-20
-20
to the ground
with 1uF
to the ground
with 1uF
to the ground
with 1uF
-40
-40
-40
-60
-80
-60
-80
-60
-80
-100
-100
-100
-120
-140
-120
-140
-120
-140
10
100
1k
10k
100k
10
100
1k
10k
100k
10
100
1k
10k
100k
Frequency [Hz]
Frequency [Hz]
Frequency [Hz]
Fig.32 Noise Spectrum
(VDD=3.3V)
Fig.33 Noise Spectrum
(VDD=5.5V)
Fig.31 Noise Spectrum
(VDD=2.4V)
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
6/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Electrical characteristic curves – BD88200GUL (Reference data)
100
10
10
VDD=3.3V
f=1kHz
BPF
0
-20
RL=32
VDD=3.3V, Po=10mW
Ω
8
6
Ri=10k , Input coupling
Ω
capacitor = 1.0uF
4
RL=16
Ω
-40
1
2
In phase
RL=16
Ω
0
-60
0.1
-2
-4
-6
-8
-10
VDD=3.3V
20kHz-LPF
f=1kHz
RL=32
Ω
-80
0.01
0.001
-100
Stereo
Out of phase
RL=16
Ω
-120
1n
100n
10u
1m
100m
10
100
1k
Frequency [Hz]
10k
100k
-120 -100 -80
-60
-40
-20
0
Input Voltage [dBV]
Output Power [W]
Fig.36 THD+N vs. Output
Power (VDD=3.3V, RL=16Ω)
Fig.34 Output Voltage vs.
Input Voltage (VDD=3.3V)
Fig.35 Gain vs. Frequency
(VDD=3.3V)
100
100
10
100
10
VDD=3.3V
RL=32Ω
20kHz-LPF
Stereo (in phase)
VDD=3.3V
RL=16Ω
20kHz-LPF
Stereo (in phase)
10
1
1
In phase
1
Po=0.1mW
Po=1mW
Po=0.1mW
Po=1mW
0.1
0.1
0.1
VDD=3.3V
20kHz-LPF
f=1kHz
0.01
0.001
0.01
0.001
0.01
0.001
Stereo
Out of phase
RL=32
Ω
Po=10mW
10k
Po=10mW
10
100
1k
100k
1n
100n
10u
1m
100m
10
100
1k
10k
100k
Frequency [Hz]
Output Power [W]
Frequency [Hz]
Fig. 37 THD+N vs. Output
Fig.38 THD+N vs. Frequency
Fig. 39 THD+N vs. Frequency
Power (VDD=3.3V, RL=32Ω)
(VDD=3.3V, RL=16Ω)
(VDD=3.3V, RL=32Ω)
0
VDD=3.3V
-20
Input connect
to the ground
with 1uF
-40
-60
-80
-100
-120
-140
10
100
1k
Frequency [Hz]
10k
100k
Fig.40 Noise Spectrum
(VDD=3.3V)
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
7/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Electrical characteristic curves – BD88210GUL (Reference data)
100
10
10
VDD=3.3V
f=1kHz
BPF
VDD=3.3V
Po=10mW
Input coupling
capacitor = 1.0uF
0
-20
RL=32
Ω
8
6
4
RL=16
Ω
-40
1
2
In phase
RL=16
Ω
0
-60
0.1
-2
-4
-6
-8
-10
VDD=3.3V
20kHz-LPF
f=1kHz
RL=32
Ω
-80
0.01
0.001
-100
Stereo
Out of phase
RL=16
Ω
-120
1n
100n
10u
1m
100m
10
100
1k
10k
100k
-120 -100 -80
-60
-40
-20
0
Output Power [W]
Input Voltage [dBV]
Frequency [Hz]
Fig.43 THD+N vs. Output
Power (VDD=3.3V, RL=16Ω)
Fig.41 Output Voltage vs.
Input Voltage (VDD=3.3V)
Fig.42 Gain vs. Frequency
(VDD=3.3V)
100
100
10
100
10
VDD=3.3V
RL=32Ω
20kHz-LPF
Stereo (in phase)
VDD=3.3V
RL=16Ω
20kHz-LPF
Stereo (in phase)
10
1
1
1
In phase
Po=0.1mW
Po=1mW
Po=0.1mW
Po=1mW
0.1
0.1
0.1
VDD=3.3V
20kHz-LPF
f=1kHz
0.01
0.001
0.01
0.001
0.01
0.001
Stereo
Out of phase
Po=10mW
Po=10mW
10k
RL=32
Ω
10
100
1k
100k
1n
100n
10u
1m
100m
10
100
1k
10k
100k
Frequency [Hz]
Output Power [W]
Frequency [Hz]
Fig.45 THD+N vs. Frequency
Fig. 46 THD+N vs. Frequency
Fig. 44 THD+N vs. Output
(VDD=3.3V, RL=16Ω)
(VDD=3.3V, RL=32Ω)
Power (VDD=3.3V, RL=32Ω)
0
VDD=3.3V
-20
Input connect
to the ground
with 1uF
-40
-60
-80
-100
-120
-140
10
100
1k
Frequency [Hz]
10k
100k
Fig.47 Noise Spectrum
(VDD=3.3V)
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
8/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Electrical characteristic curves – BD88220GUL (Reference data)
10
100
10
VDD=3.3V
f=1kHz
BPF
0
-20
RL=32
Ω
RL=16
8
6
Ω
4
RL=32
Ω
-40
2
1
In phase
RL=16
Ω
0
-60
-2
-4
-6
-8
-10
0.1
VDD=3.3V
20kHz-LPF
f=1kHz
-80
VDD=3.3V
Po=10mW
Input coupling
capacitor = 1.0uF
0.01
0.001
-100
Stereo
Out of phase
RL=16
Ω
-120
10
100
1k
10k
100k
1n
100n
10u
1m
100m
-120 -100 -80
-60
-40
-20
0
Input Voltage [dBV]
Frequency [Hz]
Output Power [W]
Fig.48 Output Voltage vs.
Input Voltage (VDD=3.3V)
Fig.49 Gain vs. Frequency
(VDD=3.3V)
Fig.50 THD+N vs. Output
Power (VDD=3.3V, RL=16Ω)
100
10
100
10
100
VDD=3.3V
RL=16Ω
20kHz-LPF
Stereo (in phase)
VDD=3.3V
RL=32Ω
20kHz-LPF
Stereo (in phase)
10
1
1
1
In phase
Po=0.1mW
Po=1mW
Po=0.1mW
Po=1mW
0.1
0.1
0.1
VDD=3.3V
20kHz-LPF
f=1kHz
0.01
0.001
0.01
0.001
0.01
0.001
Stereo
Out of phase
Po=10mW
Po=10mW
10k
RL=32
Ω
10
100
1k
10k
100k
10
100
1k
100k
1n
100n
10u
1m
100m
Frequency [Hz]
Frequency [Hz]
Output Power [W]
Fig. 51 THD+N vs. Output
Fig.52 THD+N vs. Frequency
Fig. 53 THD+N vs. Frequency
Power (VDD=3.3V, RL=32Ω)
(VDD=3.3V, RL=16Ω)
(VDD=3.3V, RL=32Ω)
0
VDD=3.3V
-20
Input connect
to the ground
with 1uF
-40
-60
-80
-100
-120
-140
10
100
1k
Frequency [Hz]
10k
100k
Fig.54 Noise Spectrum
(VDD=3.3V)
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
9/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Pin Arrangement
1
2
3
4
D
C
B
A
SVDD
INL
OUTL
OUTR
SVSS
PVSS
C1N
SHDNRB SHDNLB
INR SGND
PGND
C1P
PVDD
(Bottom View)
●Pin Function
Ball
Pin name
Function
Symbol
Matrix
A1
A2
A3
A4
B1
B2
B4
C1
C2
C4
D1
D2
D3
D4
INR
SGND
PVDD
C1P
Headphone Amplifier (Rch) input
Ground for Headphone Amplifier
C
-
Positive Power Supply for Charge Pump
Flying Capacitor (CF) Positive
-
A
E
E
-
SHDNRB Headphone Amplifier (Rch) Shutdown Control (H:active, L:shutdown)
SHDNLB Headphone Amplifier (Lch) Shutdown Control (H:active, L:shutdown)
PGND
INL
Ground for Charge Pump
Headphone Amplifier (Lch) input
Headphone Amplifier (Rch) output
Flying Capacitor (CF) Negative
Ground for Headphone Amplifier
Headphone Amplifier (Lch) output
Negative Supply Voltage for Signal
Negative Supply Voltage output
C
D
B
-
OUTR
C1N
SVDD
OUTL
SVSS
PVSS
D
-
F
●Pin equivalent circuit
PGND PGND
PVDD PVDD
SVDD
ꢀ ꢀ ꢀ ꢀ
PAD
-
PAD
PAD
ꢀ ꢀ ꢀ ꢀ
+
ꢀ ꢀ ꢀ ꢀ
PVSS PVSS
PGND PGND
B
SVSS
A
C
SVDD
SVDD
PGND PGND
ꢀ ꢀ ꢀ ꢀ
-
ꢀꢀꢀꢀ
ꢀ
PAD
PAD
PAD
+
ꢀ ꢀ
ꢀ ꢀ ꢀ
SVSS
D
SGND
F
E
Fig.55 Pin equivalent circuit
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2011.03 – Rev. A
10/25
© 2011 ROHM Co., Ltd. All rights reserved.
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Block Diagram
B1
C1
SVDD
D1
SVDD
Rfb
Rin
PVDD
1.0μF
A3
SVDD
-
OUTL
D2
R2=Rin
C1P
A4
+
SGND
R1=Rfb
SVSS
SVDD
PGND
SVDD
TSD
CHARGE
PUMP
UVLO/
SHUTDOWN
CONTROL
B4
C4
SHORT
PROTECTION
COM
B2
C1N
R1=Rfb
SGND
SVDD
PVDD
SVSS
+
OUTR
C2
CHARGE
PUMP
CONTROL
CLOCK
GENERATOR
R2=Rin
PVSS
D4
-
SVDD
Rin
Rfb
SVSS
D3
SVSS
SGND
A2
A1
Type
Rin
Rfb
BD88200GUL
BD88210GUL
BD88215GUL
BD88220GUL
14kΩ@Typ.
14kΩ@Typ.
14kΩ@Typ.
14kΩ@Typ.
Open
14kΩ@Typ.
21kΩ@Typ.
28kΩ@Typ.
Fig.56 Block Diagram
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
11/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Functional descriptions
The conventional headphone amplifier composition is occupied to Fig.57. In this composition, the signal is output by using
the middle point bias circuit based on the middle point bias. Therefore, the output coupling capacitor that removes the DC
voltage difference and does the AC coupling is necessary. This coupling capacitor and the impedance of the headphone
composes the high-pass filter. Therefore, the signal degradation in the low frequency region learns by experience. The
output coupling capacitor should be a large capacity, because the cutoff frequency of this high-pass filter becomes the
following formula (1).
1
fc
(1)
2πRLCC
* Cc is the coupling capacitor, and RL is the impedance of the headphone.
Moreover, POP noise by the middle point bias start-up is generated and the degradation of PSRR learns by experience.
Vout
Vhp
VDD
Input
VDD
-
Cc
VDD/2
+
0
0
time [s]
time [s]
GND
Middle Point
Bias Circuit
Fig.57 Conventional headphone amplifier composition
The composition of the series of BD882xxGUL is occupied to Fig.58. In this composition, the signal is output by using a
negative voltage based on the ground level. Therefore, the amplifier output can be connected directly with the headphone.
And, the output coupling capacitor becomes unnecessary. Additionally, the signal degradation in the low frequency region
with the coupling capacitor is not generated, and the deep bass is achieved.
Moreover, POP noise is controlled because of no middle point bias start-up. And, the degradation of PSRR doesn't occur by
being based on the ground.
Vout
Vhp
Input
VDD
HPVDD
HPVDD
-
+
0
CF : Flying
Capacitor
time [s]
VSS
Charge
Pump
CH : Hold
Capacitor
0
time [s]
Fig.58 Composition of the series of BD882xxGUL
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
12/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
BD882□□GUL has the function “Virtual Ground-reference output“. “Virtual Ground-reference output” can be canceled
Noise (see Fig.59 “Vn”) between IC and headphone jack by feedback ground of headphone jack to IC.
Vout
Input
VDD
Vo
Vout
Vo
-
+
Vn=Vg
0
0
time[s]
time[s]
Vn
Charge
Pump
GND
Vg
(Ground-bias type)
Vout
Input
VDD
-
Vo
Vout
Vo
Vn=Vg
+
0
0
time[s]
time[s]
Vn
Charge
Pump
GND
Vg
(Virtual ground-bias type)
Fig.59. Ground noise canceling function by “virtual ground”
Connect Pin “B2” (COM) to ground near headphone jack.
In case of BD88200GUL, value error of external resistors makes noise rejection characteristic worse.
Put “External resistors” that have high accuracy within 5%, near the LSI.
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
13/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
[CHARGE PUMP / CHARGE PUMP CONTROL]
The negative power supply circuit is composed of the regulated charge-pump. This circuit outputs the regulated negative
voltage (PVSS) directly from power-supply voltage (PVDD). Therefore, it doesn't depend on the power-supply voltage, and
a constant voltage is output (PVSS=-2.4V@Typ., refer to Fig.4). Moreover, there is not swinging of the power supply by the
output current of the headphone amplifier, and it doesn't influence the headphone amplifier characteristic.
0
Ta=25
℃
VDD=3.3V
SHDN_B=SVDD
CF=CH=2.2uF
-0.5
-1
-1.5
-2
-2.5
-3
0
20
40
60
80
Load Current [mA]
Fig.60 Characteristics of load current regulation of PVSS (Reference data)
・Power control
The power control is a logical sum of SHDNLB and SHDNRB. The negative power supply circuit starts when H level is
input to either of SHDNLB or SHDNRB, and power is downed at the SHDNLB=SHDNRB=L level.
Table.1 Control of the charge pump
SHDNLB
SHDNRB
Control
Power down
Power on
Power on
Power on
L
L
L
H
L
H
H
H
・Operating Frequency
The operating frequency of the negative power supply charge pump is designed for the temperature and the voltage
dependence may decrease. The reference data (measurements) is occupied to Fig.61. Please note the interference with
the frequency in the application board.
400
380
360
340
320
300
280
260
240
220
200
400
380
360
340
320
300
280
260
240
220
200
Ta=25
Measure : C1P
CF=CH=2.2uF
VDD=3.3V
Measure : C1P
CF=CH=2.2uF
℃
2.0
3.0
4.0
Supply Voltage[V]
5.0
6.0
-50.0
0.0
50.0
100.0
Ta [℃]
Fig.61 Temperature characteristic and Voltage characteristic of operating frequency (Reference data)
・The flying capacitor and the hold capacitor
The flying capacitor (CF) and the hold capacitor (CH) greatly influence the characteristic of the charge pump. Therefore,
please connect the capacitor with an excellent temperature characteristic and voltage characteristic of 2.2µF as much as
possible near IC.
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
14/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
[HEADPHONE AMP]
The headphone amplifier is driven by the internal positive voltage (+2.4V) and negative voltage (SVSS, -2.4V) based on
ground (SGND). Therefore, the headphone can be connected without the output coupling capacitor. As a result, it brings the
improved low-frequency characteristic compared with the headphone of the conventional coupling capacitor type.
・Power control
L channel and R channel of the headphone amplifier can be independently controlled by SHDNLB and SHDNRB logic.
When the SVSS voltage is -1.1V@Typ. or more, the headphone amplifier does not operate to protect from illegal operation.
And in addition, the overcurrent protection circuit is built in. The amplifier is shutdown when the overcurrent occurs
because of the output short-circuit etc., and IC is protected from being destroyed.
Table.2 Control of the headphone amplifier
SHDNLB
SHDNRB
L channel
Power down
Power down
Power on
R channel
Power down
Power on
L
L
L
H
L
H
H
Power down
Power on
H
Power on
[V]
SHDNxB
VDD
0
[time]
[time]
[V]
0
-1.1V
SVSS
Amprilier
Disable
Amplifier
Enable
Fig.62 Area of headphone amplifier can operate
SVSS does not have internal connection with PVSS. Please connect SVSS with PVSS on the application board.
・Input coupling capacitor
Input DC level of BD882xxGUL is 0V (SGND). The input coupling capacitor is necessary for the connection with the
signal source device. The signal decrease happens in the low frequency because of composing the high-pass filter by
this input coupling capacitor and the input impedance of BD882xxGUL.
The input impedance of BD882xxGUL is Rin (14kΩ@Typ.). The cutoff frequency of this high-pass filter becomes the
following formula. (In BD88200GUL, Rin becomes external resistance Ri. )
1
fc
(2)
2πRinCin
* Cin is the input coupling capacitor.
9.0
6.0
Rin=14k
Ω
3.0
Cin=10uF
0.0
-3.0
-6.0
Cin=4.7uF
Cin=2.2uF
Cin=1uF
-9.0
-12.0
-15.0
-18.0
-21.0
1
10
Frequency [Hz]
100
Fig.63 Frequency response by the input coupling capacitor (Reference data)
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
15/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
And, the degradation of THD+N happens because of the input coupling capacitor. Therefore, please consider these about
the selection of parts.
0
BD88215GUL
-10
VDD=3.3V
-20
-30
-40
-50
-60
-70
-80
-90
-100
Po=10mW
RL=16Ω
20kHz LPF
Cin=1.0µF
Cin=0.47µF
Cin=0.22µF
Cin=2.2µF
10
100
1k
10k
100k
Frequency [Hz]
* Capacitor size: 1608
Fig.64 THD+N by the input coupling capacitor (Reference data)
・State of terminal when power down
The state of the terminal changes by the power control of the headphone amplifier. When it is shutdown, the input
impedance of the input terminal becomes 7.1kΩ@Typ. (In BD88200GUL, become Ri + 7.1kΩ). The time constant can be
reduced when the input coupling capacitor is charged.
The input voltage changes while charging up the input coupling capacitor. Therefore, do not operate the headphone
amplifier while charging.
Rin =7.1kΩ
Output
Bias
Vs
Vin
Vout
Audio
Source
Cin
VDD
-
0
0
time [s]
+
Output
Bias
VSS
time [s]
Fig.65 Input voltage transition with input coupling capacitor
This charge time constant becomes the following formula (3) by using the input coupling capacitor and the input
impedance. And the calculation value of the convergence to the wait time is indicated in Fig.66.
τ RinCin
(3)
* Rin=7.1kΩ@Typ.. In BD88200GUL, Rin=Ri+7.1kΩ
100
90
80
70
60
50
40
30
20
10
0
0τ
1τ
2τ
3τ
4τ
5τ
6τ
7τ
8τ
Wait time [s]
Fig.66 Wait time and convergence (Reference)
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2011.03 – Rev. A
16/25
© 2011 ROHM Co., Ltd. All rights reserved.
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
[UVLO / SHUTDOWN CONTROL]
BD882xxGUL has low voltage protection function (UVLO: Under Voltage Lock Out). And protect from the illegal operation of
IC by a low power supply voltage.
The detection voltage is 2.13V@Typ., so it does not influence 2.4V of recommended operation voltage. UVLO controls the
whole of IC, and does both the negative power supply charge pump and the headphone amplifier in power down.
[TSD]
BD882xxGUL has overheating protection function (TSD: Thermal Shutdown). And the headphone amplifier becomes
shutdown when illegally overheating by the headphone amplifier illegally operation.
●Timming Chart
(Usually Operation)
PVDD,SVDD
SHDNLB
SHDNRB
Amp enable
PVSS,SVSS
INL,INR
OUTL
OUTR
Shutdown Setup
Signal output
Shutdown
Fig.67 Usually Operation
(UVLO Operation)
PVDD,SVDD
SHDNLB,
SHDNRB
PVSS,SVSS
OUTL
OUTR
Signal output
UVLO
Setup Signal output
Fig.68 UVLO Operation
(TSD Operation)
Hysteresis = 5℃
Ta
PVDD,SVDD
SHDNLB,
SHDNRB
PVSS,SVSS
OUTL
OUTR
Signal output
TSD
Signal output
Fig.69 TSD Operation
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
17/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
SHUTDOWN
Control
Lch Input
●Application Circuit
1.0μF
C1
3.3V
B1
SVDD
D1
SVDD
3.3V
Rin
Rfb
1.0μF
PVDD
A3
SVDD
-
OUTL
1.0μF
C1P
D2
Part
CF
Function
value
2.2µF
Remarks
R2=Rin
+
A4
Flying
Capacitor
Temp. Characteristic：
Class-B
SGND
R1=Rfb
SVSS
SVDD
Hold
Capacitor
Bypass
Capacitor
Bypass
Capacitor
Coupling
Capacitor
Coupling
Capacitor
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
CH
Cpvdd
Csvdd
Cil
2.2µF
1.0µF
1.0µF
1.0µF
1.0µF
PGND
SVDD
C1
CHA RGE
B4
UVLO/
SHUTDOWN
CONTROL
SHORT
PROTECTION
PUMP
2.2μF
TSD
C2
COM
2.2μF
C1N
B2
R1=Rfb
SVDD
PVDD
C4
SVSS
+
SGND
OUTR
CHARGE
PUMP
CONTROL
CLOCK
GENERATOR
R2=Rin
C2
PVSS
D4
-
Temp. Characteristic：
Class-B
Cir
SVDD
Rin
Rfb
SVSS
SVSS
SGND
D3
A2
A1
1.0μF
Rch Input
Fig.70 BD88210GU/BD88215GUL/BD88220GUL application circuit
Part
CF
Function
Flying
Capacitor
value
2.2µF
Remarks
Temp. Characteristic：
Class-B
Hold
Capacitor
Bypass
Capacitor
Bypass
Capacitor
Coupling
Capacitor
Coupling
Capacitor
Input
Resistor
Feedback
Resistor
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
MCR006YZPJ103
(ROHM)
MCR006YZPJ103
(ROHM)
CH
Cpvdd
Csvdd
Cil
2.2µF
1.0µF
1.0µF
1.0µF
1.0µF
10kΩ
10kΩ
Cir
Ri
Rf
Fig.71 BD88200GUL application circuit
In BD88200GUL, the Pass Gain becomes the following formula (4). The Pass Gain and the resister Rf is limited by table.3.
Rf
Gain
(4)
Ri
Table.3 Pass Gain and Resister Limit
Item
Min.
Typ.
Max.
Unit
Pass Gain
0.5
1.0
-
1.0
10
10
2.0
V/V
kΩ
kΩ
Rf
Ri
-
-
Ri is not limited. But, if this resister Ri is very small, the signal decrease happens in the low frequency (Refer to formula 2).
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
18/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Thermal Derating Curve
The reference value of the thermal derating curve is indicated in Fig.72.
(Conditions)
This value is for mounted on the ROHM application board
Board size：40mm x 60mm x 1.6mm
Top Copper Area：79.9%
Bottom Copper Area：80.2%
Board Layout：Fig.75
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
25
50
75
Ta [
100
125
150
]
℃
Fig.72 Thermal Derating Curve
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
19/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Evaluation Board
BD882XXFV Evaluation Board loads with the necessary parts. It can operate only by it. It is using RCA Connector for input
terminal and Headphone jack (φ=3.5mm) for output terminal. Therefore it can easily connect between Audio equipments.
And it can operate by single supply (2.4 to 5.5V). The switch on the board (SDB) can control shutdown.
(Spec.)
Item
Limit
Unit
Supply Voltage Range (VDD)
Maximum Supply Current
Operating Temperature Range
Input Voltage Range
3.0 to 5.5
1.0
V
A
-40 to 85
-2.5 to 2.5
-2.5 to 2.5
15
℃
V
Output Voltage Range
V
Minimum Load Impedance
Ω
(Schematic)
OUTL OUTR
R6
R5
CN1
R
L
Headphone
Jack
D2
C1
C2
OUTL
OUTR
INR
A1
A4
C4
IN<L>
IN<R>
INL
IN<L>
IN<R>
C6
1µF
C4
BD88210GUL
/ BD88215GUL
/ BD88220GUL
1µF
RCA(White)
VDD
RCA(Red)
C1P
A3
D1
C1
2.2µF
3.3V
PVDD
SVDD
C1N
+
C7
10u
F
C2
1µF
C5
1µF
B4
A2
D4
D3
GND
GND
PGND
SGND
PVSS
SVSS
C3
2.2µF
GND
VSS
VDD
VDD
GND
SHDNR
SHDNLB
SW2
B2
B1
B
(Open)
SHDNLB
SHDNRB
(Open)
SW1
GND
Fig.73 Evaluation Board Schematic (BD88210GUL/BD88215GUL/BD88220GUL)
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
20/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
OUTL OUTR
R6
R5
CN1
R
L
Headphone
Jack
D2
C1
C2
A1
A4
C4
OUTL
OUTR
INR
R4
10k
Ω
R2
10k
Ω
IN<L>
IN<R>
INL
IN<L>
IN<R>
R3
10kΩ
R1
C6
1µF
C4
1µF
10kΩ
RCA(White)
VDD
RCA(Red)
BD88200GUL
C1P
C1N
A3
D1
C1
2.2µF
3.3V
PVDD
SVDD
+
C7
10u
F
C2
1µF
C5
1µF
B4
A2
D4
D3
GND
GND
PGND
SGND
PVSS
SVSS
C3
2.2µF
GND
VSS
VDD
GND
SHDNB
SW1
COM
B1
B2
(Open)
SHDNL
COM
R8
R7
10kΩ
10kΩ
Fig.74 Evaluation Board Schematic (BD88200GUL)
(Parts List)
Parts name
Type
CSP-14pin
Value
Size
U1
C1, C3
C2, C4～C6
C7
BD882xxGUL
2.2µF
1.0µF
10µF
2.1mm x 2.1mm
Chip Ceramic capacitor
Chip Ceramic capacitor
Tantalum capacitor
Chip Resistor
1608
1608
3216
R1～R4
R5, R6
CN1
10kΩ
Open
1608
Chip Resistor
-
Headphone jack
-
φ=3.5mm
1608
R1～R4 *
Chip Resistor
10kΩ
*About BD88200GUL, R1～R4 of is the resistor for the gain setting.
(Operation procedure)
①
②
③
④
⑤
⑥
Turn off the switch (SHNDLB/SHDNRB) on evaluation board.
Connect the positive terminal of the power supply to the VDD pin and ground terminal to the GND pin.
Connect the left output of the audio source to the INL and connect the right output to the INR.
Turn on the power supply.
Turn on the switch (SHDNLB/SHDNRB) on the evaluation board. (H)
Input the audio source.
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2011.03 – Rev. A
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© 2011 ROHM Co., Ltd. All rights reserved.
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
(Board Layout)
(TOP SILKSCREEN – TOP VIEW)
(TOP LAYER - TOP VIEW)
(BOTTOM LAYER – TOP VIEW)
(BOTTOM SILKSCREEN – TOP VIEW)
Fig.75 ROHM Application Board Layout (BD88210GUL/BD88215GUL/BD88220GUL)
(TOP SILKSCREEN – TOP VIEW)
(TOP LAYER - TOP VIEW)
(BOTTOM LAYER – TOP VIEW)
(BOTTOM SILKSCREEN – TOP VIEW)
Fig.76 ROHM Application Board Layout (BD88200GUL)
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2011.03 – Rev. A
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© 2011 ROHM Co., Ltd. All rights reserved.
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Notes for use
(1) Absolute Maximum Ratings
An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc.,
can break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. If
any special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical
safety measures including the use of fuses, etc.
(2) Operating conditions
These conditions represent a range within which characteristics can be provided approximately as expected. The
electrical characteristics are guaranteed under the conditions of each parameter.
(3) Reverse connection of power supply connector
The reverse connection of power supply connector can break down ICs. Take protective measures against the
breakdown due to the reverse connection, such as mounting an external diode between the power supply and the IC’s
power supply terminal.
(4) Power supply line
Design PCB pattern to provide low impedance for the wiring between the power supply and the GND lines. In this
regard, for the digital block power supply and the analog block power supply, even though these power supplies has
the same level of potential, separate the power supply pattern for the digital block from that for the analog block, thus
suppressing the diffraction of digital noises to the analog block power supply resulting from impedance common to the
wiring patterns. For the GND line, give consideration to design the patterns in a similar manner.
Furthermore, for all power supply terminals to ICs, mount a capacitor between the power supply and the GND terminal.
At the same time, in order to use an electrolytic capacitor, thoroughly check to be sure the characteristics of the
capacitor to be used present no problem including the occurrence of capacity dropout at a low temperature, thus
determining the constant.
(5) GND voltage
Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state.
Furthermore, check to be sure no terminals are at a potential lower than the GND voltage including an actual electric
transient.
(6) Short circuit between terminals and erroneous mounting
In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting
can break down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between terminals or
between the terminal and the power supply or the GND terminal, the ICs can break down.
(7) Operation in strong electromagnetic field
Be noted that using ICs in the strong electromagnetic field can malfunction them.
(8) Inspection with set PCB
On the inspection with the set PCB, if a capacitor is connected to a low-impedance IC terminal, the IC can suffer stress.
Therefore, be sure to discharge from the set PCB by each process. Furthermore, in order to mount or dismount the set
PCB to/from the jig for the inspection process, be sure to turn OFF the power supply and then mount the set PCB to
the jig. After the completion of the inspection, be sure to turn OFF the power supply and then dismount it from the jig. In
addition, for protection against static electricity, establish a ground for the assembly process and pay thorough attention
to the transportation and the storage of the set PCB.
(9) Input terminals
In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the
parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of
the input terminal. Therefore, pay thorough attention not to handle the input terminals, such as to apply to the input
terminals a voltage lower than the GND respectively, so that any parasitic element will operate. Furthermore, do not
apply a voltage to the input terminals when no power supply voltage is applied to the IC. In addition, even if the power
supply voltage is applied, apply to the input terminals a voltage lower than the power supply voltage or within the
guaranteed value of electrical characteristics.
(10) Ground wiring pattern
If small-signal GND and large-current GND are provided, It will be recommended to separate the large-current GND
pattern from the small-signal GND pattern and establish a single ground at the reference point of the set PCB so that
resistance to the wiring pattern and voltage fluctuations due to a large current will cause no fluctuations in voltages of
the small-signal GND. Pay attention not to cause fluctuations in the GND wiring pattern of external parts as well.
(11) External capacitor
In order to use a ceramic capacitor as the external capacitor, determine the constant with consideration given to a
degradation in the nominal capacitance due to DC bias and changes in the capacitance due to temperature, etc.
(12) About the rush current
For ICs with more than one power supply, it is possible that rush current may flow instantaneously due to the internal
powering sequence and delays. Therefore, give special consideration to power coupling capacitance, power wiring,
width of GND wiring, and routing of wiring.
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
23/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Ordering part number
B
D
8
8
2
0
0
G U
L
-
E
2
Part No.
BD
Part No.
88200
88210
88215
88220
Package
GUL: VCSP50L2
Packaging and forming specification
E2: Embossed tape and reel
VCSP50L2(BD88200GUL)
<Tape and Reel information>
1PIN MARK
Tape
Embossed carrier tape
3000pcs
Quantity
E2
Direction
of feed
The direction is the 1pin of product is at the upper left when you hold
reel on the left hand and you pull out the tape on the right hand
2.10 0.05
(
)
S
φ
14- 0.25 0.05
0.06
S
0.05
A B
A
D
C
B
A
B
(φ0.15)INDEX POST
Direction of feed
1pin
1
2
3
4
0.30 0.05
P=0.5×3
Reel
Order quantity needs to be multiple of the minimum quantity.
∗
VCSP50L2(BD88210GUL)
<Tape and Reel information>
1PIN MARK
Tape
Embossed carrier tape
Quantity
3000pcs
E2
Direction
of feed
The direction is the 1pin of product is at the upper left when you hold
reel on the left hand and you pull out the tape on the right hand
2.10 0.05
(
)
S
φ
14- 0.25 0.05
0.06
S
0.05
A B
A
D
C
B
A
B
(φ0.15)INDEX POST
Direction of feed
1pin
1
2
3
4
0.30 0.05
P=0.5×3
Reel
Order quantity needs to be multiple of the minimum quantity.
∗
VCSP50L2(BD88215GUL)
<Tape and Reel information>
1PIN MARK
Tape
Embossed carrier tape
Quantity
3000pcs
E2
Direction
of feed
The direction is the 1pin of product is at the upper left when you hold
reel on the left hand and you pull out the tape on the right hand
2.10 0.05
(
)
S
φ
14- 0.25 0.05
0.06
S
0.05
A B
A
D
C
B
A
B
(φ0.15)INDEX POST
Direction of feed
1pin
1
2
3
4
0.30 0.05
P=0.5×3
Reel
Order quantity needs to be multiple of the minimum quantity.
∗
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
24/25
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
VCSP50L2(BD88220GUL)
<Tape and Reel information>
1PIN MARK
Tape
Embossed carrier tape
3000pcs
Quantity
E2
Direction
of feed
The direction is the 1pin of product is at the upper left when you hold
reel on the left hand and you pull out the tape on the right hand
2.10 0.05
(
)
S
φ
14- 0.25 0.05
0.06
S
0.05
A B
A
D
C
B
A
B
(φ0.15)INDEX POST
Direction of feed
1pin
1
2
3
4
0.30 0.05
P=0.5×3
Reel
Order quantity needs to be multiple of the minimum quantity.
∗
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© 2011 ROHM Co., Ltd. All rights reserved.
2011.03 – Rev. A
25/25
Notice
N o t e s
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, commu-
nication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-
controller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specified herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
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R1120
A
相关型号：
BD88400FJ
BD88400FJ是无需输出耦合电容器的耳机放大器。本IC内置有稳压电荷泵型负电源发生电路，可从电源电压直接生成稳定的-2.4V负电压。通过采用+2.4V的正电压与该负电压的两种电压来驱动耳机放大器，以ground level为基准进行输出。因此，无需大容量的输出耦合电容器，可直接连接耳机。由此，可降低成本，缩减电路板面积，降低部件的高度。此外，没有因输出耦合电容器与输出负载阻抗引起的低音区域的信号衰减，可输出丰富的低音。
ROHM
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