TS4890IST STMicroelectronics, TS4890IST Datasheet - Page 5

IC AMP AUDIO PWR 1W MONO 8MSOP

TS4890IST

Manufacturer Part Number
TS4890IST
Description
IC AMP AUDIO PWR 1W MONO 8MSOP
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet

Specifications of TS4890IST

Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
1W x 1 @ 8 Ohm
Voltage - Supply
2.5 V ~ 5.5 V
Features
Depop, Standby, Thermal Protection
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-6776-2
TS4890IST

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REMARKS
1. All measurements, except PSRR measurements, are made with a supply bypass capacitor Cs = 100µF.
1. External resistors are not needed for having better stability when supply @ Vcc down to 3V. The
quiescent current still remains the same.
2. The standby response time is about 1µs.
Components
Rfeed
Cfeed
Rstb
Rin
Cin
Cs
Cb
Gv
Inverting input resistor which sets the closed loop gain in conjunction with Rfeed. This resistor also
forms a high pass filter with Cin (fc = 1 / (2 x Pi x Rin x Cin))
Input coupling capacitor which blocks the DC voltage at the amplifier input terminal
Feed back resistor which sets the closed loop gain in conjunction with Rin
Supply Bypass capacitor which provides power supply filtering
Bypass pin capacitor which provides half supply filtering
Low pass filter capacitor allowing to cut the high frequency
Pull-down resistor which fixes the right supply level on the standby pin
Closed loop gain in BTL configuration = 2 x (Rfeed / Rin)
(low pass filter cut-off frequency 1 / (2 x Pi x Rfeed x Cfeed))
Functional Description
TS4890
5/32

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