Coupling Capacitorless Headphone Amplifiers - Rohm
Description
Headphone Amplifiers
Coupling Capacitorless Headphone Amplifiers
BD88400GUL,BD88410GUL,BD88415GUL,BD88420GUL
No.
11102EAT04
●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.
●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) Ground-Referenced Outputs 5) Gain setting
BD88400GUL: Variable gain with external resistors BD88410GUL: -1.
0V/V BD88415GUL: -1.
5V/V BD88420GUL: -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
BD88400GUL BD88410GUL BD88415GUL
Supply Supply Voltage Current
[V] [mA]
Gain [V/V]
Variable gain with external
resister
Maximum Output Power
[mW]
THD+N [%]
Noise Voltage [µVrms]
PSRR [dB]
2.
4～5.
5
2.
0
(No signal)
-1.
0 -1.
5
80 0.
006
(VDD=3.
3V,RL=16Ω (VDD=3.
3V,RL=16Ω THD+N≦1%,f=1kHz) Po=10mW,f=1kHz)
10
-80
(f=217Hz)
Package
VCSP50L2
(2.
1mm x 2.
1mm)
BD88420GUL
-2.
0
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, Ltd.
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1/25
2011.
03 – Rev.
A
BD88400GUL,BD88410GUL,BD88415GUL,BD88420GUL
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