Rohm BD88200GUL Coupling capacitorless headphone amplifier Datasheet

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
Type
Supply Supply
Voltage Current
[V]
[mA]
BD88215GUL
Maximum
Output Power
[mW]
THD+N
[%]
80
0.006
Noise
Voltage
[µVrms]
PSRR
[dB]
Package
Variable gain
with external
resister
BD88200GUL
BD88210GUL
Gain
[V/V]
2.4～5.5 (No2.0
signal)
BD88220GUL
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© 2011 ROHM Co., Ltd. All rights reserved.
-1.0
-1.5
(VDD=3.3V,RL=16Ω (VDD=3.3V,RL=16Ω
THD+N≦1%,f=1kHz) Po=10mW,f=1kHz)
10
-80
(f=217Hz)
VCSP50L2
(2.1mm x 2.1mm)
-2.0
1/25
2011.03 – Rev. A
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Absolute maximum ratings
Parameter
Symbol
Ratings
Unit
SGND to PGND voltage
VGG
0.0
V
SVDD to PVDD voltage
VDD
-0.3～0.3
V
SVSS to PVSS voltage
VSS
0.0
V
SGND or PGND to SVDD, PVDD voltage
VDG
-0.3～6.0
V
SVSS, PVSS to SGND or PGND voltage
VSG
-3.5～0.3
V
SGND to IN_- voltage
VIN
(SVSS-0.3)～2.8
V
SGND to OUT_- voltage
VOUT
(SVSS-0.3)～2.8
V
PGND to C1P- voltage
VC1P
(PGND-0.3)～(PVDD+0.3)
V
PGND to C1N- voltage
VC1N
(PVSS-0.3)～(PGND+0.3)
V
SGND to SHDN_B- voltage
VSH
(SGND-0.3)～(SVDD+0.3)
V
Input current
IIN
-10～10
mA
Power Dissipation
PD
1350 *
mW
TSTG
-55～150
℃
Storage Temperature Range
*
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
Supply Voltage Range
Operating Temperature Range
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© 2011 ROHM Co., Ltd. All rights reserved.
Ratings
Symbol
Unit
Min.
Typ.
Max.
VSVDD,VPVDD
2.4
-
5.5
V
TOPR
-40
-
+85
℃
2/25
2011.03 – Rev. A
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
Symbol
Unit
Conditions
Min.
Typ.
Max.
Supply Current
Shutdown Supply Current
IST
-
0.1
2
µA
IDD1
-
1.3
-
mA
IDD2
-
2.0
7.4
mA
H Level Input Voltage
VIH
1.95
-
-
V
L Level Input Voltage
VIL
-
-
0.70
V
ILEAK
-
-
±1
µA
Shutdown to Full Operation
tSON
-
80
-
µs
Offset Voltage
VIS
-
±0.5
±5.0
mV
30
60
-
mW
40
80
-
mW
-
0.008
0.056
%
-
0.006
0.100
%
10
14
19
kΩ
-
-1.00
-
-1.05
-1.00
-0.95
Quiescent Supply Current
SHDNLB=SHDNRB=L
(SHDNLB,SHDNRB)=(H,L) or (L,H),
No signal
SHDNLB=SHDNRB=H,
No signal
SHDN_B Terminal
Input Leak Current
Headphone Amplifier
Maximum Output Power
Total Harmonic Distortion
+ Noise
POUT
THD+N
Input Impedance
ZIN
BD88200GUL
BD88210GUL
Gain
AV
V/V
BD88215GUL
-1.55
-1.50
-1.45
BD88220GUL
-2.06
-2.00
-1.94
ΔAV
-
1
-
%
Noise
VN
-
10
-
µVrms
Slew Rate
SR
-
0.15
-
V/µs
Maximum Capacitive Load
CL
-
200
-
pF
Crosstalk
CT
-
-90
-
dB
PSRR
-
-80
-
dB
Charge-Pump
Oscillator Frequency
fOSC
200
300
430
kHz
Thermal-Shutdown Threshold
TSD
-
145
-
℃
Thermal-Shutdown Hysteresis
THYS
-
5
-
℃
Gain match
Power Supply
Rejection Ratio
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© 2011 ROHM Co., Ltd. All rights reserved.
3/25
SHDNLB=SHDNRB=L→H
RL=32Ω, THD+N≦-40dB, f=1kHz,
20kHz LPF, for Single Channel
RL=16Ω, THD+N≦-40dB, f=1kHz,
20kHz LPF, for Single Channel
RL=32Ω, POUT=10mW, f=1kHz,
20kHz LPF
RL=16Ω, POUT=10mW, f=1kHz,
20kHz LPF
SHDNLB=SHDNRB=H
In BD88200GUL, ZIN = Ri
In BD88200GUL, Gain is variable
by the external resister of Ri and Rf.
20kHz LPF + JIS-A
RL=32Ω, f=1kHz, VOUT=200mVP-P,
1kHz BPF
f=217Hz, 100mVP-P‐ripple,
217Hz BPF
2011.03 – Rev. A
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
1u
4.0
100n
10n
1n
0.1n
0.0
3.0
* This caracteristics has
hysteresis (40mV typ) by
UVLO.
2.0
1.0
0.0
1.0
2.0
3.0
4.0
5.0
1.0
2.0
3.0
* This caracteristics has
hysteresis (40mV typ) by
UVLO.
2.0
1.0
3.0
4.0
5.0
6.0
0.0
1.0
Supply Voltage [V]
Supply Voltage [V]
120
160
Setup time [us]
-1
-1.5
-2
140
Maximum Output Power [mW]
SHDNLB=SHDNRB
=L->H
VSS 90% Setup time
No Load
180
120
100
80
60
40
-2.5
3.0
2.5
3.0 3.5
4.0 4.5
5.0 5.5
2.0
6.0
2.5
3.0 3.5
100
80
60
RL=32Ω, in phase
40
RL=32Ω, out of phase
THD+N≦-40dB
20kHz LPF
Stereo
20
2.0
6.0
-20
-20
-20
-60
-40
-50
-60
-40
-50
-60
-70
-70
-70
-80
-80
-80
-90
-90
-90
-100
-100
-100
10
100
1k
10k
10
100k
100
1k
10k
100k
10
-20
-30
PSRR [dB]
-30
-40
-50
-60
-20
-30
-40
-50
-60
-40
-50
-60
-70
-70
-80
-80
-80
-90
-90
-90
-100
-100
-100
100
1k
10k
100k
Frequency [Hz]
Fig.10 Crosstalk vs.
Frequency (VDD=2.4V)
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© 2011 ROHM Co., Ltd. All rights reserved.
10
100
1k
10k
Frequency [Hz]
Fig.11 Crosstalk vs.
Frequency (VDD=3.3V)
4/25
VDD=5.5V
VOUT = 200mVp-p
RL=32Ω
BPF
-10
-70
10
100k
0
VDD=3.3V
VOUT = 200mVp-p
RL=32Ω
BPF
-10
PSRR [dB]
-20
10k
Frequency [Hz]
0
VDD=2.4V
VOUT = 200mVp-p
RL=32Ω
BPF
1k
Fig.9 PSRR vs. Frequency
(VDD=5.5V)
Fig.8 PSRR vs. Frequency
(VDD=3.3V)
0
-10
100
Frequency [Hz]
Frequency [Hz]
Fig.7 PSRR vs. Frequency
(VDD=2.4V)
6.0
-30
PSRR [dB]
PSRR [dB]
-50
5.0 5.5
VDD=5.5V
Ripple = 100mVp-p
BPF
-10
-30
-40
4.0 4.5
0
VDD=3.3V
Ripple = 100mVp-p
BPF
-10
-30
3.0 3.5
Supply Voltage [V]
0
VDD=2.4V
Ripple = 100mVp-p
BPF
2.5
Fig.6 Maximum power vs.
Supply Voltage
Fig.5 Setup time vs.
Supply Voltage
0
-10
PSRR [dB]
5.0 5.5
Supply Voltage [V]
Supply Voltage [V]
Fig.4 Negative Voltage vs.
Supply Voltage
PSRR [dB]
4.0 4.5
6.0
RL=16Ω, in phase
0
0
2.0
5.0
RL=16Ω, out of phase
20
-3
4.0
Fig.3 Stereo Operating
Current vs. Supply voltage
200
SHDNLB=VDD
SHDNRB=VDD
No Load
2.0
Supply Voltage [V]
Fig.2 Monaural Operating
Current vs. Supply Voltage
0
-0.5
SHDNLB=VDD
SHDNRB=VDD
0.0
0.0
6.0
Fig.1 Standby Current vs.
Supply Voltage
VSS Voltage [V]
Operating Current [mA]
SHDNLB=VDD
SHDNRB=0V
Operating Current [mA]
Standby Current [A]
SHDNLB=0V
SHDNRB=0V
100k
10
100
1k
10k
100k
Frequency [Hz]
Fig.12 Crosstalk vs.
Frequency (VDD=5.5V)
2011.03 – Rev. A
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Electrical characteristic curves – BD88215GUL (Reference data)
-20
Output Voltage [dBV]
-40
RL=16Ω
-60
-80
-40
RL=16Ω
-60
-80
-120
-120
-100
-80
-60
-40
-20
-120
-120
0
10
8
8
RL=16Ω
6
-100
-80
-60
-80
-40
-20
-120
-120
0
VDD=2.4V
Po=10mW
RL=16Ω
Input coupling
capacitor = 1.0uF
-4
-6
-8
100
RL=32Ω
-2
VDD=3.3V
Po=10mW
RL=16Ω
Input coupling
capacitor = 1.0uF
-4
-6
-8
1k
10k
2
10
100
-6
-8
10k
100k
10
10
0.01
0.001
1n
100n
In phase
0.1
VDD=3.3V
20kHz-LPF
f=1kHz
Stereo
RL=16 Ω
0.01
Out of phase
0.001
10u
1m
1n
100m
THD+N [%]
10
THD+N [%]
10
1
100n
1
0.1
Out of phase
0.001
1m
1n
100m
10
10
10
THD+N [%]
100
0.1
VDD=2.4V
20kHz-LPF
f=1kHz
Stereo
RL=32Ω
0.01
0.001
1n
100n
1
In phase
0.1
VDD=3.3V
20kHz-LPF
f=1kHz
Stereo
RL=32 Ω
0.01
Out of phase
0.001
10u
1m
100m
Output Power [W]
Fig.22 THD+N vs. Output
Power (VDD=2.4V, RL=32Ω)
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© 2011 ROHM Co., Ltd. All rights reserved.
1n
100n
1
0.1
VDD=5.5V
20kHz-LPF
f=1kHz
Stereo
RL=32 Ω
Out of phase
0.001
1m
100m
Output Power [W]
Fig.23 THD+N vs. Output
Power (VDD=3.3V, RL=32Ω)
5/25
1m
100m
In phase
0.01
10u
10u
Fig.21 THD+N vs. Output
Power (VDD=5.5V, RL=16Ω)
100
In phase
100n
Out of phase
Output Power [W]
Fig.20 THD+N vs. Output
Power (VDD=3.3V, RL=16Ω)
100
1
VDD=5.5V
20kHz-LPF
f=1kHz
Stereo
RL=16 Ω
Output Power [W]
Output Power [W]
Fig.19 THD+N vs. Output
Power (VDD=2.4V, RL=16Ω)
100k
In phase
0.01
10u
10k
Frequency [Hz]
100
In phase
1k
Fig.18 Gain vs. Frequency
(VDD=5.5V)
100
VDD=2.4V
20kHz-LPF
f=1kHz
Stereo
RL=16Ω
100
Frequency [Hz]
Fig.17 Gain vs. Frequency
(VDD=3.3V)
100
0.1
VDD=5.5V
Po=10mW
RL=16Ω
Input coupling
capacitor = 1.0uF
-4
1k
Frequency [Hz]
1
RL=32Ω
0
-2
-10
100k
Fig.16 Gain vs. Frequency
(VDD=2.4V)
0
RL=16Ω
6
-10
10
-20
4
0
-10
-40
8
RL=16Ω
Gain [dB]
-2
-60
Fig.15 Output Voltage vs.
Input Voltage (VDD=5.5V)
2
Gain [dB]
RL=32Ω
0
-80
Input Voltage [dBV]
4
2
-100
10
6
4
Gain [dB]
RL=16Ω
-60
Fig.14 Output Voltage vs.
Input Voltage (VDD=3.3V)
Fig.13 Output Voltage vs.
Input Voltage (VDD=2.4V)
THD+N [%]
-40
Input Voltage [dBV]
10
RL=32Ω
-100
Input Voltage [dBV]
THD+N [%]
-20
-100
-100
VDD=5.5V
f=1kHz
BPF
0
RL=32Ω
THD+N [%]
Output Voltage [dBV]
-20
VDD=3.3V
f=1kHz
BPF
0
RL=32Ω
Output Voltage [dBV]
VDD=2.4V
f=1kHz
BPF
0
1n
100n
Out of phase
10u
1m
100m
Output Power [W]
Fig.24 THD+N vs. Output
Power (VDD=5.5V, RL=32Ω)
2011.03 – Rev. A
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Electrical characteristic curves – BD88215GUL (Reference data) – Continued
100
VDD=2.4V
RL=16 Ω
20kHz-LPF
Stereo (in phase)
1
10
THD+N [%]
Po=0.1mW
Po=1mW
0.1
1
Po=0.1mW
Po=1mW
0.1
0.01
0.01
Po=10mW
0.001
10
100
1k
Po=10mW
10
100k
100
Frequency [Hz]
Po=0.1mW
Po=10mW
Po=1mW
10
100
1k
Po=0.1mW
Po=10mW
0.1
Po=1mW
100
1k
10k
1
Spectrum [dBV]
-80
10
-40
-60
-80
-40
-60
-80
-120
-120
-140
-140
Frequency [Hz]
Fig.31 Noise Spectrum
(VDD=2.4V)
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© 2011 ROHM Co., Ltd. All rights reserved.
100k
VDD=5.5V
Input connect
to the ground
with 1uF
-20
-100
100k
10k
0
VDD=3.3V
Input connect
to the ground
with 1uF
-120
10k
1k
Frequency [Hz]
-100
1k
100
Fig. 30 THD+N vs. Frequency
(VDD=5.5V, RL=32Ω)
-100
100
Po=1mW
0.001
Fig. 29 THD+N vs. Frequency
(VDD=3.3V, RL=32Ω)
-20
-60
10
Po=0.1mW
Po=10mW
0.1
100k
0
VDD=2.4V
Input connect
to the ground
with 1uF
-40
VDD=5.5V
RL=32Ω
20kHz-LPF
Stereo (in phase)
Frequency [Hz]
Frequency [Hz]
0
100k
0.01
10
100k
10k
Fig. 27 THD+N vs. Frequency
(VDD=5.5V, RL=16Ω)
10
0.001
10k
1k
100
1
Fig. 28 THD+N vs. Frequency
(VDD=2.4V, RL=32Ω)
-20
100
Frequency [Hz]
0.01
0.001
Po=10mW
10
100k
THD+N [%]
THD+N [%]
THD+N [%]
10k
VDD=3.3V
RL=32Ω
20kHz-LPF
Stereo (in phase)
10
0.01
Spectrum [dBV]
1k
100
VDD=2.4V
RL=32 Ω
20kHz-LPF
Stereo (in phase)
0.1
0.1
0.001
Fig. 26 THD+N vs. Frequency
(VDD=3.3V, RL=16Ω)
100
1
Po=0.1mW
Po=1mW
Frequency [Hz]
Fig.25 THD+N vs. Frequency
(VDD=2.4V, RL=16Ω)
10
1
0.01
0.001
10k
VDD=5.5V
RL=16Ω
20kHz-LPF
Stereo (in phase)
10
Spectrum [dBV]
THD+N [%]
10
100
VDD=3.3V
RL=16Ω
20kHz-LPF
Stereo (in phase)
THD+N [%]
100
-140
10
100
1k
10k
Frequency [Hz]
Fig.32 Noise Spectrum
(VDD=3.3V)
6/25
100k
10
100
1k
10k
100k
Frequency [Hz]
Fig.33 Noise Spectrum
(VDD=5.5V)
2011.03 – Rev. A
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Electrical characteristic curves – BD88200GUL (Reference data)
VDD=3.3V, Po=10mW
Ri=10kΩ, Input coupling
capacitor = 1.0uF
8
6
4
-40
RL=16Ω
-60
-80
RL=16Ω
2
0
-2
RL=32Ω
-4
In phase
1
0.1
VDD=3.3V
20kHz-LPF
f=1kHz
Stereo
RL=16Ω
0.01
-6
-100
-8
-120
-120
0.001
-10
-100
-80
-60
-40
-20
10
0
100
Input Voltage [dBV]
1k
10k
1n
100k
VDD=3.3V
RL=16Ω
20kHz-LPF
Stereo (in phase)
0.1
VDD=3.3V
20kHz-LPF
f=1kHz
Stereo
RL=32Ω
0.01
0.001
THD+N [%]
In phase
1
Po=0.1mW
Po=1mW
0.1
100n
10u
1m
100m
Output Power [W]
Po=10mW
10
100
1k
10k
Frequency [Hz]
Fig. 37 THD+N vs. Output
Power (VDD=3.3V, RL=32Ω)
1
Po=1mW
0.1
Po=0.1mW
0.01
0.01
Out of phase
0.001
1n
100m
VDD=3.3V
RL=32Ω
20kHz-LPF
Stereo (in phase)
10
THD+N [%]
10
1
1m
100
100
10
10u
Fig.36 THD+N vs. Output
Power (VDD=3.3V, RL=16Ω)
Fig.35 Gain vs. Frequency
(VDD=3.3V)
100
100n
Out of phase
Output Power [W]
Frequency [Hz]
Fig.34 Output Voltage vs.
Input Voltage (VDD=3.3V)
THD+N [%]
10
THD+N [%]
RL=32Ω
Gain [dB]
Output Voltage [dBV]
-20
100
10
VDD=3.3V
f=1kHz
BPF
0
Fig.38 THD+N vs. Frequency
(VDD=3.3V, RL=16Ω)
Po=10mW
0.001
100k
10
100
1k
10k
100k
Frequency [Hz]
Fig. 39 THD+N vs. Frequency
(VDD=3.3V, RL=32Ω)
0
VDD=3.3V
Input connect
to the ground
with 1uF
Spectrum [dBV]
-20
-40
-60
-80
-100
-120
-140
10
100
1k
10k
100k
Frequency [Hz]
Fig.40 Noise Spectrum
(VDD=3.3V)
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© 2011 ROHM Co., Ltd. All rights reserved.
7/25
2011.03 – Rev. A
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Electrical characteristic curves – BD88210GUL (Reference data)
100
10
VDD=3.3V
Po=10mW
Input coupling
capacitor = 1.0uF
8
6
4
-40
Gain [dB]
RL=16Ω
-60
-80
2
-2
RL=32Ω
VDD=3.3V
20kHz-LPF
f=1kHz
Stereo
RL=16Ω
0.01
0.001
-10
-100
-80
-60
-40
-20
10
0
100
1k
10k
1n
100k
VDD=3.3V
RL=16Ω
20kHz-LPF
Stereo (in phase)
10
VDD=3.3V
20kHz-LPF
f=1kHz
Stereo
RL=32Ω
1n
THD+N [%]
In phase
1
1
Po=0.1mW
Po=1mW
0.1
Po=10mW
0.001
1m
100m
Output Power [W]
Po=1mW
0.1
Po=0.1mW
10
100
1k
10k
Po=10mW
0.001
100k
Frequency [Hz]
Fig.45 THD+N vs. Frequency
(VDD=3.3V, RL=16Ω)
Fig. 44 THD+N vs. Output
Power (VDD=3.3V, RL=32Ω)
1
0.01
Out of phase
10u
100m
VDD=3.3V
RL=32Ω
20kHz-LPF
Stereo (in phase)
10
0.01
100n
1m
100
100
10
10u
Fig.43 THD+N vs. Output
Power (VDD=3.3V, RL=16Ω)
Fig.42 Gain vs. Frequency
(VDD=3.3V)
100
100n
Out of phase
Output Power [W]
Frequency [Hz]
Input Voltage [dBV]
THD+N [%]
0.1
-8
Fig.41 Output Voltage vs.
Input Voltage (VDD=3.3V)
0.001
In phase
1
-6
-120
-120
0.01
RL=16Ω
0
-4
-100
0.1
10
THD+N [%]
Output Voltage [dBV]
-20
RL=32Ω
THD+N [%]
VDD=3.3V
f=1kHz
BPF
0
10
100
1k
10k
100k
Frequency [Hz]
Fig. 46 THD+N vs. Frequency
(VDD=3.3V, RL=32Ω)
0
VDD=3.3V
Input connect
to the ground
with 1uF
Spectrum [dBV]
-20
-40
-60
-80
-100
-120
-140
10
100
1k
10k
100k
Frequency [Hz]
Fig.47 Noise Spectrum
(VDD=3.3V)
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© 2011 ROHM Co., Ltd. All rights reserved.
8/25
2011.03 – Rev. A
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Electrical characteristic curves – BD88220GUL (Reference data)
10
VDD=3.3V
f=1kHz
BPF
100
RL=16Ω
8
6
10
4
-40
RL=16Ω
-60
-80
RL=32Ω
2
0
-2
VDD=3.3V
Po=10mW
Input coupling
capacitor = 1.0uF
-4
-6
-100
-8
-120
-120
-100
-80
-60
-40
-20
100
1k
10k
100k
1n
0.01
0.001
1n
100n
1
Po=0.1mW
Po=1mW
0.1
0.01
Out of phase
10u
1m
100m
1
Po=1mW
0.1
Po=0.1mW
0.01
Po=10mW
0.001
10
100
1k
10k
Po=10mW
0.001
100k
Frequency [Hz]
Output Power [W]
Fig. 51 THD+N vs. Output
Power (VDD=3.3V, RL=32Ω)
100m
VDD=3.3V
RL=32Ω
20kHz-LPF
Stereo (in phase)
10
THD+N [%]
THD+N [%]
VDD=3.3V
20kHz-LPF
f=1kHz
Stereo
RL=32Ω
1m
100
VDD=3.3V
RL=16Ω
20kHz-LPF
Stereo (in phase)
10
In phase
10u
Fig.50 THD+N vs. Output
Power (VDD=3.3V, RL=16Ω)
100
10
100n
Out of phase
Output Power [W]
Fig.49 Gain vs. Frequency
(VDD=3.3V)
100
0.1
VDD=3.3V
20kHz-LPF
f=1kHz
Stereo
RL=16Ω
Frequency [Hz]
Input Voltage [dBV]
1
0.1
0.001
10
0
In phase
1
0.01
-10
Fig.48 Output Voltage vs.
Input Voltage (VDD=3.3V)
THD+N [%]
THD+N [%]
-20
RL=32Ω
Gain [dB]
Output Voltage [dBV]
0
Fig.52 THD+N vs. Frequency
(VDD=3.3V, RL=16Ω)
10
100
1k
10k
100k
Frequency [Hz]
Fig. 53 THD+N vs. Frequency
(VDD=3.3V, RL=32Ω)
0
VDD=3.3V
Input connect
to the ground
with 1uF
Spectrum [dBV]
-20
-40
-60
-80
-100
-120
-140
10
100
1k
10k
100k
Frequency [Hz]
Fig.54 Noise Spectrum
(VDD=3.3V)
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© 2011 ROHM Co., Ltd. All rights reserved.
9/25
2011.03 – Rev. A
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Pin Arrangement
D
●Pin Function
Ball
Matrix
A1
1
2
3
4
SVDD
OUTL
SVSS
PVSS
C
INL
OUTR
C1N
B
SHDNRB
SHDNLB
PGND
A
INR
SGND
PVDD
(Bottom View)
Pin name
C1P
Function
Symbol
INR
Headphone Amplifier (Rch) input
C
A2
SGND
Ground for Headphone Amplifier
-
A3
PVDD
Positive Power Supply for Charge Pump
-
A4
C1P
Flying Capacitor (CF) Positive
A
B1
SHDNRB
Headphone Amplifier (Rch) Shutdown Control (H:active, L:shutdown)
E
B2
SHDNLB
Headphone Amplifier (Lch) Shutdown Control (H:active, L:shutdown)
E
B4
PGND
Ground for Charge Pump
-
C1
INL
C2
OUTR
Headphone Amplifier (Lch) input
C
Headphone Amplifier (Rch) output
D
C4
C1N
Flying Capacitor (CF) Negative
B
D1
SVDD
Ground for Headphone Amplifier
-
D2
OUTL
Headphone Amplifier (Lch) output
D
D3
SVSS
Negative Supply Voltage for Signal
-
D4
PVSS
Negative Supply Voltage output
F
●Pin equivalent circuit
PGND PGND
PVDD PVDD
SVDD
-
PAD
PAD
PAD
+
A
B
PGND PGND
C
PVSS PVSS
SVDD
SVDD
SVSS
PGND PGND
PAD
PAD
PAD
+
D
SVSS
E
SGND
F
Fig.55 Pin equivalent circuit
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© 2011 ROHM Co., Ltd. All rights reserved.
10/25
2011.03 – Rev. A
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
INL
SHDNB
●Block Diagram
B1
C1
SVDD
SVDD
Rin
D1
Rfb
PVDD
A3
SVDD
OUTL
1.0μF
D2
R2=Rin
C1P
+
A4
SGND
SVSS
SVDD
R1=Rfb
PGND
B4
SVDD
CHARGE
PUMP
UVLO/
SHUTDOWN
CONTROL
SHORT
PROTECTION
TSD
COM
C1N
B2
R1=Rfb
C4
PVSS
SVDD
PVDD
SGND
CHARGE
PUMP
CONTROL
SVSS
OUTR
+
CLOCK
GENERATOR
R2=Rin
C2
-
D4
SVDD
Rin
R fb
SVSS
SVSS
SGND
A1
INR
SGND
A2
D3
Type
Rin
Rfb
BD88200GUL
14kΩ@Typ.
Open
BD88210GUL
14kΩ@Typ.
14kΩ@Typ.
BD88215GUL
14kΩ@Typ.
21kΩ@Typ.
BD88220GUL
14kΩ@Typ.
28kΩ@Typ.
Fig.56 Block Diagram
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© 2011 ROHM Co., Ltd. All rights reserved.
11/25
2011.03 – Rev. A
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.
VDD
Cc
+
Vhp
VDD
Vout [V]
+
Vout
Input
VDD/2
0
time [s]
Vhp [V]
GND
Middle Point
Bias Circuit
0
time [s]
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
Input
+
CF : Flying
Capacitor
VDD
Vout [V]
HPVDD
Vhp
HPVDD
0
time [s]
Charge
Pump
Vhp [V]
VSS
CH : Hold
Capacitor
0
time [s]
Fig.58 Composition of the series of BD882xxGUL
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12/25
2011.03 – Rev. A
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
Vo
+
Vout
Vn=Vg
Voltage[V]
VDD
Voltage[V]
Input
0
Vo
0
time[s]
time[s]
Vn
Charge
Pump
GND
Vg
(Ground-bias type)
Vout
Vo
+
Vout
Vn=Vg
Voltage[V]
VDD
Voltage[V]
Input
Vo
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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13/25
2011.03 – Rev. A
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
VSS Voltage [V]
-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
L
L
Power down
L
H
Power on
H
L
Power on
H
H
Power on
・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
VDD=3.3V
Measure : C1P
CF=CH=2.2uF
Charge Pump Ocsillator Frequency [kHz]
Charge Pump Ocsillator Frequency [kHz]
400
340
320
300
280
260
240
220
200
-50.0
0.0
50.0
380
360
340
320
300
280
260
240
220
200
2.0
100.0
Ta=25℃
Measure : C1P
CF=CH=2.2uF
3.0
4.0
5.0
6.0
Supply Voltage[V]
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.
14/25
2011.03 – Rev. A
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
L
L
Power down
R channel
Power down
L
H
Power down
Power on
H
L
Power on
Power down
H
H
Power on
Power on
[V]
SHDNxB
VDD
0
[time]
[V]
0
[time]
-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)
2πR in C in
* Cin is the input coupling capacitor.
9.0
Rin=14kΩ
6.0
3.0
Cin=10uF
Gain [dB]
0.0
-3.0
-6.0
Cin=4.7uF
-9.0
-12.0
Cin=2.2uF
-15.0
Cin=1uF
-18.0
-21.0
1
10
100
Frequency [Hz]
Fig.63 Frequency response by the input coupling capacitor (Reference data)
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15/25
2011.03 – Rev. A
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
VDD=3.3V
Po=10mW
RL=16Ω
20kHz LPF
-10
-20
THD+N [dB]
-30
Cin=1.0µF
-40
Cin=0.47µF
-50
-60
Cin=0.22µF
-70
-80
-90
Cin=2.2µF
-100
10
100
1k
10k
100k
Frequency [Hz]
* Capacitor size: 1608
Fig.64 THD+N by the input coupling capacitor (Reference data)
Audio
Source
Vin
Vs
Rin =7.1kΩ
Cin
Vs [V]
・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.
Vout
VDD
Output
Bias
0
time [s]
Vin [V]
+
Output
Bias
VSS
0
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  R in C in
(3)
Convergence [%]
* 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
Wait time [s]
6τ
7τ
8τ
Fig.66 Wait time and convergence (Reference)
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16/25
2011.03 – Rev. A
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.
17/25
2011.03 – Rev. A
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Application Circuit
Lch Input
INL
SHDNB
SHUTDOWN
Control
B1
1.0μF
3.3V
C1
SVDD
SVDD
D1
3.3V
Rin
Rfb
1.0μF
PVDD
A3
SVDD
OUTL
1.0μF
+
A4
SGND
SVDD
CF
SVSS
R1=Rfb
PGND
CH
SVDD
C1
B4
2.2μF
Part
D2
R2=Rin
C1P
CHA RGE
PUMP
UVLO/
SHUTDOWN
CONTROL
SHORT
PROTECTION
TSD
C2
Cpvdd
COM
2.2μF
C1N
C4
PVSS
B2
R1=Rfb
PVDD
SVDD
SGND
CHARGE
PUMP
CONTROL
Cil
OUTR
+
CLOCK
GENERATOR
Csvdd
SVSS
R2=Rin
C2
-
Cir
D4
SVDD
Rin
Function
Flying
Capacitor
Hold
Capacitor
Bypass
Capacitor
Bypass
Capacitor
Coupling
Capacitor
Coupling
Capacitor
value
2.2µF
2.2µF
1.0µF
1.0µF
1.0µF
1.0µF
Remarks
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Rfb
SVSS
SVSS
SGND
A1
INR
SGND
A2
D3
1.0μF
Rch Input
Fig.70 BD88210GU/BD88215GUL/BD88220GUL application circuit
Part
CF
CH
Cpvdd
Csvdd
Cil
Cir
Ri
Rf
Function
Flying
Capacitor
Hold
Capacitor
Bypass
Capacitor
Bypass
Capacitor
Coupling
Capacitor
Coupling
Capacitor
Input
Resistor
Feedback
Resistor
value
2.2µF
2.2µF
1.0µF
1.0µF
1.0µF
1.0µF
10kΩ
10kΩ
Remarks
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
Temp. Characteristic：
Class-B
MCR006YZPJ103
(ROHM)
MCR006YZPJ103
(ROHM)
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.
R
Gain  f (4)
Ri
Table.3 Pass Gain and Resister Limit
Item
Min.
Typ.
Max.
Unit
Pass Gain
0.5
1.0
2.0
V/V
Rf
1.0
10
-
kΩ
Ri
-
10
-
kΩ
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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18/25
2011.03 – Rev. A
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
Pd [W]
1.2
1
0.8
0.6
0.4
0.2
0
0
25
50
75
100
125
150
Ta [℃]
Fig.72 Thermal Derating Curve
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© 2011 ROHM Co., Ltd. All rights reserved.
19/25
2011.03 – Rev. A
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
3.0 to 5.5
V
1.0
A
Operating Temperature Range
-40 to 85
℃
Input Voltage Range
-2.5 to 2.5
V
Output Voltage Range
-2.5 to 2.5
V
15
Ω
Supply Voltage Range (VDD)
Maximum Supply Current
Minimum Load Impedance
(Schematic)
OUTL OUTR
R6
R
CN1
R5
L
Headphone
Jack
D2
C1
IN<L>
IN<L>
C6
1µF
RCA(White)
VDD
A3
3.3V
+
D1
C7
10u
F
C2
1µF
GND
C5
1µF
B4
A2
GND
OUTL
OUTR
INL
INR
C2
A1
BD88210GUL
/ BD88215GUL
A4
/ BD88220GULC1P
PVDD
C1N
SVDD
PGND
PVSS
SVSS
SGND
C4
IN<R>
IN<R>
C4
1µF
RCA(Red)
C1
2.2µF
D4
D3
C3
2.2µF GND
VDD
VSS
VDD
SHDNLB
(Open)
B2
SHDNLB
SW2
SHDNRB
B1
SHDNR
B
(Open)
SW1
GND
GND
Fig.73 Evaluation Board Schematic (BD88210GUL/BD88215GUL/BD88220GUL)
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© 2011 ROHM Co., Ltd. All rights reserved.
20/25
2011.03 – Rev. A
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
OUTL OUTR
R6
R
CN1
R5
L
Headphone
Jack
D2
R4
10k
Ω
IN<L>
IN<L>
C1
R3
C6
1µF 10kΩ
RCA(White)
A3
3.3V
D1
C7
10u
F
C2
1µF
GND
OUTR
INL
INR
BD88200GUL
VDD
+
OUTL
C5
1µF
B4
A2
GND
C2
A1
IN<R>
R1
C4
10kΩ 1µF
C1P
A4
PVDD
C1N
SVDD
R2
10k
Ω
PGND
PVSS
SGND
SVSS
SHDNL
COM
C4
IN<R>
RCA(Red)
C1
2.2µF
D4
D3
C3
2.2µF GND
VSS
VDD
SHDNB
B1
(Open)
B2
SW1
R7
10kΩ
COM
R8
10kΩ
GND
Fig.74 Evaluation Board Schematic (BD88200GUL)
(Parts List)
Parts name
Type
Value
Size
U1
CSP-14pin
BD882xxGUL
2.1mm x 2.1mm
C1, C3
Chip Ceramic capacitor
2.2µF
1608
C2, C4～C6
Chip Ceramic capacitor
1.0µF
1608
C7
Tantalum capacitor
10µF
3216
R1～R4
Chip Resistor
10kΩ
1608
R5, R6
Chip Resistor
Open
-
CN1
Headphone jack
-
φ=3.5mm
R1～R4 *
Chip Resistor
10kΩ
1608
*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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21/25
2011.03 – Rev. A
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 ROHM Co., Ltd. All rights reserved.
22/25
2011.03 – Rev. A
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
Technical Note
●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.
23/25
2011.03 – Rev. A
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
●Ordering part number
B
D
8
Part No.
BD
8
2
0
0
G
Part No.
88200
88210
88215
88220
U
L
-
Package
GUL: VCSP50L2
E
2
Packaging and forming specification
E2: Embossed tape and reel
VCSP50L2(BD88200GUL)
<Tape and Reel information>
0.06 S
0.05 A B
Tape
Embossed carrier tape
Quantity
3000pcs
Direction
of feed
S
E2
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
)
0.30±0.05
14- φ 0.25±0.05
0.55MAX
2.10±0.05
2.10±0.05
0.1±0.05
1PIN MARK
A
(φ0.15)INDEX POST
B
C
B
P=0.5×3
D
A
1
0.30±0.05
2
3
1pin
4
P=0.5×3
Reel
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
VCSP50L2(BD88210GUL)
<Tape and Reel information>
0.06 S
0.05 A B
Tape
Embossed carrier tape
Quantity
3000pcs
Direction
of feed
S
E2
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
)
0.30±0.05
14- φ 0.25±0.05
0.55MAX
2.10±0.05
2.10±0.05
0.1±0.05
1PIN MARK
A
(φ0.15)INDEX POST
B
C
B
P=0.5×3
D
A
1
0.30±0.05
2
3
1pin
4
P=0.5×3
Reel
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
VCSP50L2(BD88215GUL)
<Tape and Reel information>
0.06 S
0.05 A B
Tape
Embossed carrier tape
Quantity
3000pcs
Direction
of feed
S
E2
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
)
0.30±0.05
14- φ 0.25±0.05
0.55MAX
2.10±0.05
2.10±0.05
0.1±0.05
1PIN MARK
A
(φ0.15)INDEX POST
B
C
B
P=0.5×3
D
A
1
0.30±0.05
2
3
1pin
4
P=0.5×3
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© 2011 ROHM Co., Ltd. All rights reserved.
Reel
24/25
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2011.03 – Rev. A
Technical Note
BD88200GUL,BD88210GUL,BD88215GUL,BD88220GUL
VCSP50L2(BD88220GUL)
<Tape and Reel information>
0.06 S
0.05 A B
Tape
Embossed carrier tape
Quantity
3000pcs
Direction
of feed
S
E2
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
)
0.30±0.05
14- φ 0.25±0.05
0.55MAX
2.10±0.05
2.10±0.05
0.1±0.05
1PIN MARK
A
(φ0.15)INDEX POST
B
C
B
P=0.5×3
D
A
1
0.30±0.05
2
3
1pin
4
P=0.5×3
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© 2011 ROHM Co., Ltd. All rights reserved.
Reel
25/25
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2011.03 – Rev. A
Notice
Notes
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, communication 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, fuelcontroller 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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R1120A