TDA7850H STMicroelectronics, TDA7850H Datasheet

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TDA7850H

Manufacturer Part Number
TDA7850H
Description
IC AMP QUAD BRIDGE FLEXIWATT25
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet

Specifications of TDA7850H

Output Type
4-Channel (Quad)
Max Output Power X Channels @ Load
85W x 4 @ 2 Ohm
Voltage - Supply
8 V ~ 18 V
Features
Mute, Short-Circuit and Thermal Protection, Standby
Mounting Type
Through Hole
Package / Case
25-Flexiwatt (bent and staggered leads)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
Protections:
Table 1.
November 2008
High output power capability:
– 4 x 50 W/4 Ω max.
– 4 x 30 W/4 Ω @ 14.4 V, 1 kHz, 10 %
– 4 x 80 W/2 Ω max.
– 4 x 55 W/2 Ω @ 14.4V, 1 kHz, 10 %
MOSFET output power stage
Excellent 2 Ω driving capability
Hi-Fi class distortion
Low output noise
ST-BY function
Mute function
Automute at min. supply voltage detection
Low external component count:
– Internally fixed gain (26 dB)
– No external compensation
– No bootstrap capacitors
On board 0.35 A high side driver
Output short circuit to gnd, to V
load
Very inductive loads
Overrating chip temperature with soft thermal
limiter
Output DC offset detection
Load dump voltage
Fortuitous open gnd
Reversed battery
Order code
TDA7850H
Device summary
TDA7850
4 x 50 W MOSFET quad bridge power amplifier
s
, across the
Flexiwatt25 (Horizontal
Flexiwatt25 (Vertical)
Package
Rev 5
Description
The TDA7850 is a breakthrough MOSFET
technology class AB audio power amplifier in
Flexiwatt 25 package designed for high power car
radio. The fully complementary P-Channel/N-
Channel output structure allows a rail to rail
output voltage swing which, combined with high
output current and minimized saturation losses
sets new power references in the car-radio field,
with unparalleled distortion performances.
The TDA7850 integrates a DC offset detector.
ESD
(Horizontal)
Flexiwatt25
Flexiwatt25
(Vertical)
Packing
Tube
Tube
TDA7850
www.st.com
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TDA7850H Summary of contents

Page 1

... Load dump voltage ■ Fortuitous open gnd ■ Reversed battery Table 1. Device summary Order code TDA7850 TDA7850H November 2008 MOSFET quad bridge power amplifier ■ ESD Description , across the s The TDA7850 is a breakthrough MOSFET technology class AB audio power amplifier in Flexiwatt 25 package designed for high power car radio ...

Page 2

Contents Contents 1 Block diagram and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 Block diagram . ...

Page 3

TDA7850 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 4

List of figures List of figures Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 5

TDA7850 1 Block diagram and application circuit 1.1 Block diagram Figure 1. Block diagram IN1 IN2 IN3 IN4 1.2 Standard test and application circuit Figure 2. Standard test and application circuit ST-BY MUTE IN1 IN2 C2 0.1μF IN3 C3 0.1μF ...

Page 6

Pin description 2 Pin description Figure 3. Pin connection (top view) 6/18 TAB 1 P-GND2 OUT2- ST-BY OUT2 OUT1- P-GND1 OUT1+ SVR IN1 Vertical IN2 S-GND IN4 IN3 AC-GND OUT3+ P-GND3 OUT3 OUT4+ MUTE OUT4- P-GND4 ...

Page 7

TDA7850 3 Electrical specifications 3.1 Absolute maximum ratings Table 2. Absolute maximum ratings Symbol V Operating supply voltage supply voltage S (DC) V Peak supply voltage (for ms) S (pk) Output peak current I ...

Page 8

Electrical specifications 3.3 Electrical characteristics Table 4. Electrical characteristics (Refer to the test and application diagram °C; unless otherwise specified). amb Symbol Parameter I Quiescent current q1 V Output offset voltage OS During mute ON/OFF output ...

Page 9

TDA7850 Table 4. Electrical characteristics (continued) (Refer to the test and application diagram °C; unless otherwise specified). amb Symbol Parameter V V automute threshold Muting pin current pin23 HSD section V Dropout ...

Page 10

Electrical specifications Figure 4. Components and top copper layer of the Figure 5. Bottom copper layer 10/18 Figure 2. Figure 2. TDA7850 ...

Page 11

TDA7850 3.4 Electrical characteristic curves Figure 6. Quiescent current vs. supply voltage I d (mA) 200 190 ∞ 180 170 160 150 140 130 120 110 100 (V) ...

Page 12

Electrical specifications Figure 12. Distortion vs. frequency (R = 2Ω) L THD (%) 14 2Ω 0.1 0.01 0.001 10 100 1000 f (Hz) Figure 14. Supply ...

Page 13

TDA7850 Figure 18. Power dissipation vs. output power (R = 4Ω, audio program simulation (W) tot 13 4Ω GAUSSIAN NOISE CLIP START ...

Page 14

Application hints 4 Application hints Referred to the circuit of 4.1 SVR Besides its contribution to the ripple rejection, the SVR capacitor governs the turn ON/OFF time sequence and, consequently, plays an essential role in the pop optimization during ON/OFF ...

Page 15

TDA7850 5 Package information In order to meet environmental requirements, ST (also) offers these devices in ECOPACK packages. ECOPACK is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related ...

Page 16

Package information Figure 22. Flexiwatt25 (horizontal) mechanical data and package dimensions DIM. MIN. A 4. 0.37 F (1) G 0.75 G1 23.70 H (2) 28. (2) 21.64 L1 10.15 L2 (2) ...

Page 17

TDA7850 6 Revision history Table 5. Document revision history Date 22-Nov-2006 27-Feb-2007 09-Oct-2007 12-Sep-2008 07-Nov-2008 Revision 1 Initial release. 2 Added Chapter 3.4: Electrical characteristic Updated the values for the dV 3 Added Figure 20 on page Updated Figure 2: ...

Page 18

... Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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