TDA7851L Fast Delivery |IC PHOENIX CO.,LIMITED

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TDA7851L
Quad BTL output with stand-by and mute inputs, clip detection
September 2013 Doc ID 022520 Rev 3 1/15
TDA7851L
4 x 48 W MOSFET quad bridge power amplifier
Datasheet  production data
Features Multipower BCD technology High output power capability:
–4 x 48 W/4  Max.
–4 x 28 W/4  @ 14.4 V, 1 kHz, 10 %
–4 x 72 W/2  Max. MOSFET output power stage Excellent 2  driving capability Hi-Fi class distortion Low output noise Standby function Mute function Automute at min. supply voltage detection Low external component count: Internally fixed gain (26 dB) No external compensation No bootstrap capacitors Protections: Output short circuit to GND, to VS, across
the load Very inductive loads Overrating chip temperature with soft
thermal limiter Load dump voltage Fortuitous open GND Reversed battery ESD
Description
The TDA7851L is a breakthrough MOSFET
technology class AB audio power amplifier in
Flexiwatt25 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.

Table 1. Device summary
Contents TDA7851L
2/15 Doc ID 022520 Rev 3
Contents Block diagram and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 SVR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3 Standby and muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.4 Heatsink definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
TDA7851L List of tables
Doc ID 022520 Rev 3 3/15
List of tables
Table 1. Device summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 5. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
List of figures TDA7851L
4/15 Doc ID 022520 Rev 3
List of figures
Figure 1. Block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 5. Output power vs. supply voltage (RL = 4 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6. Output power vs. supply voltage (RL = 2 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 7. Distortion vs. output power (RL =4 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 8. Distortion vs. output power (RL =2 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 9. Distortion vs. frequency (RL = 4 ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 10. Distortion vs. frequency (RL = 2 ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 11. Crosstalk vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 12. Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 13. Output attenuation vs. supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 14. Power dissipation and efficiency vs. output power (RL = 4 , SINE) . . . . . . . . . . . . . . . . . 10
Figure 15. Power dissipation and efficiency vs. output power (RL = 2 , SINE) . . . . . . . . . . . . . . . . . 10
Figure 16. Power dissipation vs. output power (RL = 4 , audio program simulation) . . . . . . . . . . . . 11
Figure 17. Power dissipation vs. output power (RL = 2 , audio program simulation) . . . . . . . . . . . . 11
Figure 18. ITU R-ARM frequency response, weighting filter for transient pop. . . . . . . . . . . . . . . . . . . 11
Figure 19. Flexiwatt25 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
TDA7851L Block diagram and application circuit
Doc ID 022520 Rev 3 5/15 Block diagram and application circuit
1.1 Block diagram
Figure 1. Block diagram
1.2 Application circuit
Figure 2. Application circuit
Pin description TDA7851L
6/15 Doc ID 022520 Rev 3
2 Pin description
2.1 Pin connection
Figure 3. Pin connection (top view)
2.2 Thermal data

Table 2. Thermal data
TDA7851L Electrical specifications
Doc ID 022520 Rev 3 7/15
3 Electrical specifications
3.1 Absolute maximum ratings

3.2 Electrical characteristics
Refer to the test and application diagram, VS = 14.4 V; RL = 4 ; Rg = 600 ; f = 1 kHz;
Tamb = 25 °C; unless otherwise specified.

Table 3. Absolute maximum ratings
Table 4. Electrical characteristics
Electrical specifications TDA7851L
8/15 Doc ID 022520 Rev 3 Saturated square wave output.
Table 4. Electrical characteristics (continued)

Partno	Mfg	Dc	Qty	Available	Descript
TDA7851L	ST	N/a	4	avai	Quad BTL output with stand-by and mute inputs, clip detection