TS4871IQT STMicroelectronics, TS4871IQT Datasheet

IC AMP AUDIO PWR 1W MONO AB 8DFN

TS4871IQT

Manufacturer Part Number
TS4871IQT
Description
IC AMP AUDIO PWR 1W MONO AB 8DFN
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet

Specifications of TS4871IQT

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-DFN
Operational Class
Class-AB
Audio Amplifier Output Configuration
1-Channel Mono
Output Power (typ)
1x1@8OhmW
Audio Amplifier Function
Speaker
Total Harmonic Distortion
0.15@8Ohm@250mW%
Single Supply Voltage (typ)
3/5V
Dual Supply Voltage (typ)
Not RequiredV
Supply Current (max)
8@5VmA
Power Supply Requirement
Single
Unity Gain Bandwidth Product (typ)
2MHz
Rail/rail I/o Type
Rail to Rail Output
Power Supply Rejection Ratio
75dB
Single Supply Voltage (min)
2.5V
Single Supply Voltage (max)
5.5V
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
8
Package Type
DFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-8113-2
TS4871IQT

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TS4871IQT
Manufacturer:
ST
0
Part Number:
TS4871IQT 4871
Manufacturer:
ST
0
DESCRIPTION
The TS4871 is an Audio Power Amplifier capable
of delivering 1W of continuous RMS Ouput Power
into 8 load @ 5V.
This Audio Amplifier is exhibiting 0.1% distortion
level (THD) from a 5V supply for a Pout = 250mW
RMS. An external standby mode control reduces
the supply current to less than 10nA. An internal
thermal shutdown protection is also provided.
The TS4871 has been designed for high quality
audio applications such as mobile phones and to
minimize the number of external components.
The unity-gain stable amplifier can be configured
by external gain setting resistors.
APPLICATIONS
ORDER CODE
MiniSO & DFN only available in Tape & Reel with T suffix(IST & IQT)
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
June 2003
TS4871
Number
OPERATING FROM V
1W RAIL TO RAIL OUTPUT POWER @
Vcc=5V, THD=1%, f=1kHz, with 8 Load
ULTRA LOW CONSUMPTION IN STANDBY
MODE (10nA)
75dB PSRR @ 217Hz from 5V to 2.6V
ULTRA LOW POP & CLICK
ULTRA LOW DISTORTION (0.1%)
UNITY GAIN STABLE
AVAILABLE IN SO8, MiniSO8 & DFN8 3x3mm
Mobile Phones (Cellular / Cordless)
Laptop / Notebook Computers
PDAs
Portable Audio Devices
Part
OUTPUT RAIL TO RAIL 1W AUDIO POWER AMPLIFIER
Temperature
-40, +85°C
Range: I
CC
D
Package
= 2.5V to 5.5V
S
Q
Marking
4871I
4871
PIN CONNECTIONS (Top View)
TYPICAL APPLICATION SCHEMATIC
WITH STANDBY MODE
STANDBY
STANDBY
TS4871ID-TS4871IDT - SO8
BYPASS
BYPASS
TS4871IST - MiniSO8
V
V
V
V
IN+
IN+
IN-
IN-
TS4871IQT - DFN8
1
1
3
3
4
4
2
2
8
8
7
7
6
6
5
5
V
V
GND
GND
Vcc
Vcc
V
V
TS4871
OUT 2
OUT 2
OUT 1
OUT 1
1/28

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TS4871IQT Summary of contents

Page 1

... MiniSO & DFN only available in Tape & Reel with T suffix(IST & IQT Small Outline Package (SO) - also available in Tape & Reel (DT) June 2003 PIN CONNECTIONS (Top View) TYPICAL APPLICATION SCHEMATIC Marking Q 4871I 4871 TS4871 WITH STANDBY MODE TS4871IST - MiniSO8 TS4871ID-TS4871IDT - SO8 TS4871IQT - DFN8 STANDBY STANDBY OUT 2 OUT 2 BYPASS BYPASS ...

Page 2

TS4871 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 Thermal Resistance Junction to Ambient R 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 = Vcc ...

Page 4

TS4871 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 = Vcc ...

Page 5

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

Page 6

TS4871 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 = 22 -40 Input = floating Tamb = 25 C -50 Vcc = 5V, 3.3V & 2.6V - ...

Page 8

TS4871 Fig Pout @ THD + Supply Voltage & 1kHz 4 1.0 BW < 125kHz Tamb = 25 C 0.8 ...

Page 9

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

Page 10

TS4871 Fig THD + N vs Output Power Vcc = Cin = < 125kHz Tamb = 20Hz, 1kHz 20kHz 0.1 1E-3 0.01 ...

Page 11

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

Page 12

TS4871 Fig THD + N vs Output Power Vcc = Cin = < 125kHz 1 Tamb = 25 C 20kHz 0.1 20Hz, 1kHz 0.01 ...

Page 13

Fig THD + N vs Frequency Vcc = 1µ < 125kHz Tamb = 25°C Pout = 1.2W Pout = 600mW 0.1 20 100 1000 Frequency (Hz) ...

Page 14

TS4871 Fig THD + N vs Frequency 0.1µ 1µF 0.1 20 100 1000 Frequency (Hz) Fig THD + N vs Frequency 0.1µ 1µF 0.1 20 100 ...

Page 15

Fig THD + N vs Frequency 0.1µ 1µF 0.1 20 100 1000 Frequency (Hz) Fig THD + N vs Frequency 0.1µ 1µF 0.1 20 100 1000 ...

Page 16

TS4871 Fig THD + N vs Frequency 1 Pout = 310mW 0.1 Pout = 620mW 0.01 20 100 1000 Frequency (Hz) Fig THD + N vs Frequency 1 Pout = 270mW 0.1 Pout = 135mW 0.01 ...

Page 17

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 Vcc (V) Fig Signal to Noise Ratio vs Power Supply with ...

Page 18

TS4871 Fig Current Consumption vs Standby Voltage @ Vcc = 2. 0.0 0.5 1.0 1.5 Vstandby (V) Fig Clipping Voltage vs Power Supply Voltage and Load Resistor 1.0 0.9 ...

Page 19

APPLICATION INFORMATION Fig Demoboard Schematic Fig SO8 & MiniSO8 Demoboard Components Side TS4871 19/28 ...

Page 20

TS4871 Fig SO8 & MiniSO8 Demoboard Top Solder Layer Fig SO8 & MiniSO8 Demoboard Bottom Solder Layer BTL Configuration Principle The TS4871 is a monolithic power amplifier with a BTL output type. BTL (Bridge Tied Load) ...

Page 21

Power dissipation and efficiency Hypothesis : • Voltage and current in the load are sinusoidal (Vout and Iout) • Supply voltage is a pure DC source (Vcc) Regarding the load we have sin t ( ...

Page 22

TS4871 the internal generator resistance 50k . Then, the charge time constant for 50k xCb ( directly connected to the non-inverting input (pin 2 & 3) and if we want to minimize, in ...

Page 23

C = ----------------------------- - = 795nF IN 2 RinF C L which gives 16Hz. In Higher frequency we want 20kHz (-3dB cut off frequency). The Gain Bandwidth Product of the TS4871 is 2MHz typical and doesn’t change when the ...

Page 24

TS4871 Designator C9 Short Circuit C10 Short Circuit C12 1µF 2mm insulated Plug S1, S2, S6, S7 10.16mm pitch 3 pts connector 2.54mm S8 pitch P1 PCB Phono Jack D1* Led 3mm U1 TS4871ID or TS4871IS Application n°3 : 50Hz ...

Page 25

Note on how to use the PSRR curves (page 7) We have finished a design and we have chosen the components values : • Rin=Rfeed=22k • Cin=100nF • Cb=1µF Now, on fig. 13, we can see the PSRR (input grounded) ...

Page 26

TS4871 PACKAGE MECHANICAL DATA DIM. MIN. A 1.35 A1 0.10 A2 1.10 B 0.33 C 0.19 D 4. 5.80 h 0.25 L 0.40 k ddd 26/28 SO-8 MECHANICAL DATA mm. TYP MAX. 1.75 0.25 1.65 0.51 ...

Page 27

PACKAGE MECHANICAL DATA TS4871 27/28 ...

Page 28

... 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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