TS4902IST STMicroelectronics, TS4902IST Datasheet

IC AMP AUDIO PWR .7W MONO 8MSOP

TS4902IST

Manufacturer Part Number
TS4902IST
Description
IC AMP AUDIO PWR .7W MONO 8MSOP
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet

Specifications of TS4902IST

Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
700mW x 1 @ 8 Ohm
Voltage - Supply
2.2 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
497-8116-2
TS4902IST

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Part Number:
TS4902IST
Manufacturer:
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DESCRIPTION
The TS4902 is an audio power amplifier designed
to provide the best price to power ratio while pre-
serving high audio quality.
Available in MiniSO8 & SO8 package, it is capable
of delivering up to 0.7W of continuous RMS ouput
power into an 8 load @ 5V.
TS4902 is also exhibiting an outstanding 0.1%
distortion level (THD) from a 5V supply for a Pout
of 200mW RMS.
An externally controlled standby mode reduces
the supply current to less than 10nA. It also in-
cludes an internal thermal shutdown protection.
The unity-gain stable amplifier can be configured
by external gain setting resistors.
APPLICATIONS
ORDER CODE
S = MiniSO Package (MiniSO) is only available in Tape & Reel (ST)
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
January 2002
TS4902IST
TS4902ID
Part Number
OPERATING FROM V
0.7W OUTPUT POWER @ Vcc=5V, THD=1%,
f=1kHz, with an 8 load
0.3W OUTPUT POWER @ Vcc=3.3V,
THD=1%, f=1kHz, with an 8 load
ULTRA LOW CONSUMPTION IN STANDBY
MODE (10nA)
77dB PSRR @ 217Hz from 5V to 2.2V
ULTRA LOW POP & CLICK
ULTRA LOW DISTORTION (0.1%)
UNITY GAIN STABLE
AVAILABLE IN MiniSO8 & SO8
Mobile Phones (Cellular / Cordless)
PDAs
Portable Audio Devices
300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER
Temperature
-40, +85°C
Range
CC
= 2.2V to 5.5V
ST
Package
D
WITH STANDBY MODE ACTIVE LOW
PIN CONNECTIONS (top view)
Audio
Input
Cin
VCC
Rstb
TYPICAL APPLICATION SCHEMATIC
Rin
TS4902IS-TS4902IST - MiniSO8
TS4902ID-TS4902IDT - SO8
4
3
2
1
Cb
Vin-
Vin+
Bypass
Standby
-
+
Rfeed
Cfeed
Bias
VCC
6
7
V
C
GND
-
+
AV = -1
TS4902
TS4902
Vout 1
Vout 2
5
8
Cs
RL
8 Ohms
1/19

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TS4902IST Summary of contents

Page 1

... D = Small Outline Package (SO) - also available in Tape & Reel (DT) January 2002 WITH STANDBY MODE ACTIVE LOW PIN CONNECTIONS (top view) TYPICAL APPLICATION SCHEMATIC Audio Input Rin Cin Package VCC ST D Rstb TS4902 TS4902IS-TS4902IST - MiniSO8 TS4902ID-TS4902IDT - SO8 Cfeed Rfeed VCC Vin Vout Vin+ ...

Page 2

TS4902 ABSOLUTE MAXIMUM RATINGS Symbol 1) V Supply voltage Input Voltage i T Operating Free Air Temperature Range oper T Storage Temperature stg T Maximum Junction Temperature j R Thermal Resistance Junction to Ambient thja SO8 MiniSO8 ...

Page 3

ELECTRICAL CHARACTERISTICS V = +5V, GND = 0V 25°C (unless otherwise specified) CC amb Symbol Supply Current input signal, no load 1) Standby Current I STANDBY No input signal, Vstdby = GND ...

Page 4

TS4902 ELECTRICAL CHARACTERISTICS V = 2.6V, GND = 0V 25°C (unless otherwise specified) CC amb Symbol Supply Current input signal, no load 1) Standby Current I STANDBY No input signal, Vstdby = GND ...

Page 5

Fig Open Loop Frequency Response 60 Gain Vcc = Tamb = Phase 20 0 -20 -40 0 100 1000 Frequency (kHz) Fig Open Loop Frequency Response 80 ...

Page 6

TS4902 Fig Open Loop Frequency Response 100 80 Phase 60 Gain Vcc = 560pF -20 Tamb = 25 C -40 0 100 1000 Frequency (kHz) Fig Open Loop ...

Page 7

Fig Power Supply Rejection Ratio (PSRR) vs Power supply -30 Vripple = 200mVrms Rfeed = 22k -40 Input = floating Tamb = 25 C -50 Vcc = 5V to 2.2V - ...

Page 8

TS4902 Fig Pout @ THD + Supply Voltage & 0 1kHz BW < 125kHz 4 Tamb = 25 C 0.6 0.4 ...

Page 9

Fig Output Power vs Load Resistance 1.0 0.8 Vcc=5V 0.6 Vcc=4.5V Vcc=4V 0.4 0.2 Vcc=3.5V Vcc=3V Vcc=2.5V 0 Load Resistance (ohm) Fig Clipping Voltage vs Supply Voltage 1.0 Tamb = 25 C 0.9 ...

Page 10

TS4902 Fig THD + N vs Output Power Vcc = Cin = < 125kHz Tamb = 20kHz 20Hz, 1kHz 0.1 1E-3 0.01 ...

Page 11

Fig THD + N vs Output Power Vcc = Cin = < 125kHz Tamb = 20Hz, 1kHz 20kHz 0.1 1E-3 0.01 0.1 ...

Page 12

TS4902 Fig THD + N vs Output Power Vcc = Cin = < 125kHz 1 Tamb = 25 C 20kHz 0.1 20Hz, 1kHz 0.01 ...

Page 13

Fig Signal to Noise Ratio vs Power Supply with Unweighted Filter (20Hz to 20kHz) 100 90 RL=8 RL= 2.5 3.0 3.5 4.0 Vcc (V) Fig Signal to Noise Ratio vs Power Supply ...

Page 14

TS4902 Fig Current Consumption vs Standby Voltage @ Vcc = 3. 0.0 0.5 1.0 1.5 2.0 Vstandby (V) 14/19 Fig Current Consumption vs Standby Voltage @ Vcc = 2.6V ...

Page 15

BTL Configuration Principle The TS4902 is a monolithic power amplifier with a BTL (Bridge Tied Load) output configuration. BTL means that each end of the load is connected to two single ended output amplifiers. Thus, we have: Single ended output ...

Page 16

TS4902 The efficiency is the ratio between the output power and the power supply ----------------------- - = ---------------------- - Psup ply The maximum theoretical value is reached when Vpeak = Vcc, so ---- - = 78.5% ...

Page 17

At power OFF of the supply discharged by a constant current Icc. The discharge time from 5Cs t = ------------- - = Icc Now, ...

Page 18

TS4902 PACKAGE MECHANICAL DATA 8 PINS - PLASTIC MICROPACKAGE (SO Dim. Min 0 0.65 b 0.35 b1 0. 4 3.8 L 0.4 ...

Page 19

... No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied ...

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