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TDA7850
4 x 50W MOSFET Quad bridge power amplifier plus HSD
Features
■Superior output power capability: 4 x 50W/4Ω Max.
4 x 30W/4Ω @ 14.4V, 1KHz, 10%
4 x 80W/2Ω Max.
4 x 55W/2Ω @ 14.4V, 1KHz, 10%
■MOSFET Output power stage
■Excellent 2Ω 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 (26dB)
–No external compensation
–No bootstrap capacitors
■On board 0.35A high side driver
Flexiwatt25
(Vertical)
Flexiwatt25
(Horizontal)
Protections:
■Output short circuit to GND, to Vs, across the load
■Very inductive loads
■Overrating chip temperature with soft thermal limiter
■Output DC offset detection
■Load dump voltage
■Fortuitous open GND
■Reversed battery
■ESD
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 minimised saturation losses, sets new power references in the car-radio field, with unparalleled distortion performances.
The TDA7850 integrates a DC offset detector.
Order codes
Part number |
Package |
Packing |
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TDA7850 |
Flexiwatt25 (Vertical) |
Tube |
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TDA7850H |
Flexiwatt25 (Horizontal) |
Tube |
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November 2006 |
Rev 1 |
1/14 |
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Contents |
TDA7850 |
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Contents
1 |
Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. 5 |
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2 |
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. 6 |
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3 |
Application hints (ref. to the circuit of Figure 3) . . . . . . . . . . . . . . . . . |
10 |
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3.1 |
SVR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
10 |
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3.2 |
Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
10 |
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3.3 |
Stand-by and muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
10 |
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3.4 |
DC offset detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
10 |
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3.5 |
Heatsink definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
10 |
4 |
Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
11 |
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5 |
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
13 |
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2/14
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TDA7850 |
List of tables |
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List of tables
Table 1. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 2. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 3. Electrical characteristcs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 4. Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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List of figures |
TDA7850 |
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List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 2. Pin connection (Top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 3. Standard test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 4. P.C.B. and component layout of the Figure 3... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 5. Flexiwatt25 (vertical) mechanical data & package dimensions. . . . . . . . . . . . . . . . . . . . . . 11 Figure 6. Flexiwatt25 (horizontal) mechanical data & package dimensions . . . . . . . . . . . . . . . . . . . 12
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TDA7850 |
Block diagram and pin description |
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1 Block diagram and pin description
Figure 1. |
Block diagram |
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Vcc1 |
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Vcc2 |
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470μF |
100nF |
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ST-BY |
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MUTE |
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HSD |
HSD/VOFF_DET |
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OUT1+ |
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IN1 |
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OUT1- |
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0.1μF |
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PW-GND |
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OUT2+ |
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IN2 |
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OUT2- |
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0.1μF |
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PW-GND |
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OUT3+ |
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IN3 |
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OUT3- |
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0.1μF |
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PW-GND |
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OUT4+ |
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IN4 |
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OUT4- |
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0.1μF |
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PW-GND |
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AC-GND |
SVR |
TAB |
S-GND |
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0.47μF |
47μF |
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D94AU158D |
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Figure 2. Pin connection (Top view)
TAB |
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1 |
TAB |
1 |
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P-GND2 |
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P-GND2 |
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OUT2- |
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OUT2- |
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ST-BY |
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ST-BY |
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OUT2+ |
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OUT2+ |
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VCC |
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VCC |
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OUT1- |
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OUT1- |
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P-GND1 |
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P-GND1 |
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OUT1+ |
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OUT1+ |
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SVR |
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SVR |
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IN1 |
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IN1 |
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IN2 |
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IN2 |
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S-GND |
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S-GND |
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IN4 |
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IN4 |
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IN3 |
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IN3 |
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AC-GND |
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AC-GND |
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OUT3+ |
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OUT3+ |
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P-GND3 |
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P-GND3 |
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OUT3- |
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OUT3- |
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VCC |
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VCC |
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OUT4+ |
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OUT4+ |
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MUTE |
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MUTE |
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OUT4- |
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OUT4- |
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P-GND4 |
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P-GND4 |
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HSD |
25 |
HSD |
25 |
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D94AU159A |
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D06AU1655 |
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Vertical |
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Horizontal |
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