BL6290/BL6290 BL6290/BL6290

1.25 Watt Audio Power Amplifier

Features

_ Improved PSRR at 217 Hz & 1 KHz 62 dB

_ Power output at 5.0V, 1% THD+N, 8_ 1.20 W (typ.)

_ Power output at 3.0V, 1% THD+N, 8_ 410 mW (typ.)

_ Ultra low shutdown current 0.1 uA (typ.)

_ 2.2V – 5.5V operation

_ Improved circuitry eliminates pop-click noise during turn-on and turn-off transitions

_ No output coupling capacitors, snubber networks or bootstrap capacitors required

_ Unity-gain stable

_ External gain configuration capability

_ Available in space-saving packages: MSOP8

General Description

The BL6290 is a Class-AB audio power amplifier designed for mobile phones and other portable

communication devices. It is capable of delivering 1.28 watts of continuous average power to an

8_ BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.

The BL6290 was designed specifically to provide high quality output power with a minimal

amount of external components. It does not require output coupling capacitors or bootstrap

capacitors. And with ultra low shutdown current, the BL6290 is ideally suited for mobile phone

and other low voltage applications where minimal power consumption is a primary requirement.

With special pop-click eliminating circuit, the BL6290 provides perfect pop-click characteristic

during turn-on and turn-off transitions.

The BL6290 is unity-gain stable and can be configured by external gain-setting resistors.

Applications

_ Wireless handsets

_ Portable electronic devices

_ PDAs, Handheld computers