原装eua4992高效2w立体双响功放ic

ds4992/4992a ver1.0 mar. 2009
1
2.25w stereo audio power amplifier
description
the eua4992/4992a are dual bridge-connected audio
power amplifiers, capable of delivering 1.25w of
continuous average power to an 8ω btl with less than 1%
distortion (thd+n) from a 5.0v power supply, and
540mw to an 8ω btl load from a 3.3v power supply.
the eua4992/4992a provide high quality audio while
requiring few external components and minimal power
consumption. they feature a low-power shutdown mode,
which is achieved by driving the pin with
logic low.
the eua4992/4992a contain circuitry to prevent
from ”pop and click” noise that would otherwise occur
during turn-on and turn-off transitions.
for maximum flexibility, the eua4992/4992a provide an
externally controlled gain (with resistors), as well as an
externally controlled turn-on and turn-off times (with the
bypass capacitor).
the eua4992/4992a are available in a 16-pin tqfn
package.
typical application circuit
features
z output power at 10% thd+n, vdd=5v
-- 2.25w/ch (typ) into a 4ω load
-- 1.54w/ch (typ) into a 8ω load
z output power at 1% thd+n, vdd=5v
-- 1.9w/ch (typ) into a 4ω load
-- 1.25w/ch (typ) into a 8ω load
z output power at 1% thd+n, vdd=3.3v
-- 0.75w/ch (typ) into a 4ω load
-- 0.54w/ch (typ) into a 8ω load
z shutdown current 0.06μa (typ)
z supply voltage range 2.5v to 5.5v
z “click and pop” suppression
z thermal shutdown protection circuitry
z available in 3mm×3mm tqfn-16 (eua4992)
and 4mm×4mm tqfn-16 (eua4992a) packages
z rohs compliant and 100% lead(pb)-free
applications
z cell phones
z portable and desktop computers
z portable audio system
z multimedia monitorsds4992/4992a ver1.0 mar. 2009
1
2.25w stereo audio power amplifier
description
the eua4992/4992a are dual bridge-connected audio
power amplifiers, capable of delivering 1.25w of
continuous average power to an 8ω btl with less than 1%
distortion (thd+n) from a 5.0v power supply, and
540mw to an 8ω btl load from a 3.3v power supply.
the eua4992/4992a provide high quality audio while
requiring few external components and minimal power
consumption. they feature a low-power shutdown mode,
which is achieved by driving the pin with
logic low.
the eua4992/4992a contain circuitry to prevent
from ”pop and click” noise that would otherwise occur
during turn-on and turn-off transitions.
for maximum flexibility, the eua4992/4992a provide an
externally controlled gain (with resistors), as well as an
externally controlled turn-on and turn-off times (with the
bypass capacitor).
the eua4992/4992a are available in a 16-pin tqfn
package.
typical application circuit
features
z output power at 10% thd+n, vdd=5v
-- 2.25w/ch (typ) into a 4ω load
-- 1.54w/ch (typ) into a 8ω load
z output power at 1% thd+n, vdd=5v
-- 1.9w/ch (typ) into a 4ω load
-- 1.25w/ch (typ) into a 8ω load
z output power at 1% thd+n, vdd=3.3v
-- 0.75w/ch (typ) into a 4ω load
-- 0.54w/ch (typ) into a 8ω load
z shutdown current 0.06μa (typ)
z supply voltage range 2.5v to 5.5v
z “click and pop” suppression
z thermal shutdown protection circuitry
z available in 3mm×3mm tqfn-16 (eua4992)
and 4mm×4mm tqfn-16 (eua4992a) packages
z rohs compliant and 100% lead(pb)-free
applications
z cell phones
z portable and desktop computers
z portable audio system
z multimedia monitors