TS4909 Ultra low power stereo headphone amplifier with capacitor-less output

The TS4909 is a stereo audio amplifier designed to drive headphones in portable applications.

The integrated phantom ground is a circuit topology that eliminates the heavy output coupling capacitors. This is of primary importance in portable applications where space constraints are very high. A single-ended configuration is also available, offering even lower power consumption because the phantom ground can be switched off.

Pop-and-click noise during switch-on and switch-off phases is eliminated by integrated circuitry.

Specially designed for applications requiring low power supplies, the TS4909 is capable of delivering 31mW of continuous average power into a 32Ω load with less than 1% THD+N from a 3V power supply.

Featuring an active low standby mode, the TS4909 reduces the supply current to only 10nA (typ.). The TS4909 is unity gain stable and can be configured by external gain-setting resistors.

技术特性

No output coupling capacitors necessary
Pop-and-click noise reduction circuitry
Operating from VCC= 2.2V to 5.5V
Standby mode active low
Output power:
- 158mW @5V, into 16Ω with 1% THD+N max (1kHz)
- 52mW @3.0V into 16Ω with 1% THD+N max (1kHz)
Ultra low current consumption: 2.0mA typ.@3V
Ultra low standby consumption: 10nA typ.
High signal-to-noise ratio: 105 dB typ.@5V
High crosstalk immunity: 110dB (F=1kHz) for single-ended outputs
PSRR: 72dB (F=1kHz), inputs grounded, for phantom ground outputs
Low tWU: 50ms in PHG mode, 100ms in SE mode
Available in lead-free DFN10 3x3mm

功能框图

TS4909 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
TS4909IQT	Active			VDFPN 10 3x3x1.0	Tape And Reel	-40 °C-85 °C	TS4909IST

DATASHEET

下载	描述	版本	大小
TS4909	Dual mode low power 150mW stereo headphone amplifier with capacitor-less and single-ended outputs	8	536KB

APPLICATION NOTES

下载	描述	版本	大小
AN2622	AN2622: TS4909 low power stereo headphone amplifier evaluation board user guidelines	1	109KB