BD88400FJ
80-mW 無需耦合電容立體聲耳機放大器
BD88400FJ
80-mW 無需耦合電容立體聲耳機放大器
BD88400FJ是無需輸出耦合電容的耳機放大器。本IC內建有穩壓電荷泵型負電源發生電路，可從電源電壓直接生成穩定的-2.4V負電壓。通過採用+2.4V的正電壓與該負電壓的兩種電壓來驅動耳機放大器，以ground level為基准進行輸出。因此，無需大容量的輸出耦合電容，可直接連接耳機。由此，可降低成本，縮減電路板面積，降低部件的高度。此外，沒有因輸出耦合電容與輸出負載阻抗引起的低音區域的訊號衰減，可輸出豐富的低音。
Product Detail
規格:
Ext. Gain
Yes
Output Type
C-less
Number of Ch
2
Gain [dB]
Variable
Maximum Output [mW,RL=16Ω]
80+80
Maximum Output [mW,RL=32Ω]
60+60
Minimum Load [Ω]
16
Input Type
Analog
THD+N [%,RL=16Ω]
0.006
S/N [dB]
101
Start Up Time [µs]
80
Stand-by Current [µA]
0.1
Power Supply Voltage (Min.) [V]
2.4
Power Supply Voltage (Max.) [V]
5.5
Headphone PSRR[dB]
-80
Operating Temperature (Min.)[°C]
-40
Operating Temperature (Max.)[°C]
85
Package Size [mm]
8.65x6.0 (t=1.65)
功能:
- No Bulky DC-Blocking Capacitors Required
- No Degradation of Low-Frequency Response Due to Output Capacitors
- Ground-Referenced Outputs
- Gain setting: Variable Gain with External Resistors
- Low THD+N
- Low Supply Current
- Integrated Negative Power Supply
- Integrated Short-Circuit and Thermal-Overload Protection
參考設計 / 應用評估套件
-
- Evaluation Board - BD88400FJ-EVK-001
BD88400FJ is an output coupling capacitorless headphone amplifier. This IC has a built-in regulated negative voltage generator type that 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).
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