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PDF D7377 Data sheet ( Hoja de datos )
| Número de pieza | D7377 | |
| Descripción | 2 x 30W Dual/Quad Power Amplifier | |
| Fabricantes | Silicore | |
| Logotipo |  |
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Silicore
2×30W Dual/Quad Power Amplifier for
Car Radio D7377
DESCRIPTIONS：
The D7377 is a new technology class AB car
radio amplifier able to work either in DUAL
BRIDGE or QUAD SINGLE ENDED configuration.
The exclusive fully complementary structure of the
output stage and the internally fixed gain guarantees
the highest possible power performances with
extremely reduced component count. The on-board
HZIP15
clip detector simplifies gain compression operation. The fault diagnostics makes it
possible to detect mistakes during car radio set assembly and wiring in the car.
F E AT U R E S
High output power capability:
2×35W max./4Ω 2×30W./4Ω EIAJ
2×30W./4Ω EIAJ
2×20W./4Ω @14.4V,1kHz,10%
4×6W./4Ω @14.4V,1kHz,10%
2×10W./2Ω @14.4V,1kHz,10%
Minimum external components count:
- No bootstrap capacitors
- No boutcherot cells
- Internally fixed gain (26dB BTL)
ST-BY function (CMOS compatible)
No audible pop during ST-BY
operations
Diagnostics facility for:
- Clipping
- Out to GND short
- Out to Vs short
- Soft short at turn-on
- Thermal shutdown proximity
Output AC/DC short circuit
- To GND
- - To Vs
- Across the load
Soft short at turn-on
Overrating chip temperature with soft
thermal limiter
Load dump voltage surge
Very inductive loads
Fortuitous open GND
Reversed battery
ESD
SHAOXING SILICORE TECHNOLOGY CO.,LTD
www. Silicore. com. cn
CHMC
1/11
1 page  
Silicore
D7377
A novel design based upon the connection shown in fig. 20 has then allowed the full
exploitation of its possibilities. The clear advantages this new approach has over classical
output stages are as follows:
Rail-to-Rail Output Voltage Swing With No Need of Bootstrap Capacitors.
The output swing is limited only by the VCE sat of the output transistors, which is in the
range of 0.3. (Rsat) each. Classical solutions adopting composite PNPNPN for the upper
output stage have higher saturation loss on the top side of the waveform. This unbalanced
saturation causes a significant power reduction. The only way to recover
power consists of the addition of expensive bootstrap capacitors.
Absolute Stability Without Any External Compensation.
Referring to the circuit of fig. 20 the gain Vout/Vin is greater than unity, approximately
1+R2/R1. The DC output (VCC/2) is fixed by an auxiliary amplifier common to all the
channels. By controlling the amount of this local feedback it is possible to force the loop
gain (A*β ) to less than unity at frequency for which the phase shift is 180°. This means
that the output buffer is intrinsically stable and not prone to oscillation. Most remarkably,
the above feature has been achieved in spite of the very low closed loop gain of the
amplifier. In contrast, with the classical PNP-NPN stage, the solution adopted for reducing
the gain at high frequencies makes use of external RC networks, namely the Boucherot
cells.
BUILT–IN SHORTCIRCUIT PROTECTION
Figure 20: The New Output Stage
Reliable and safe operation, in presence of all kinds of short circuit involving the outputs
is assured by BUILT-IN protectors. Additionally to the AC/DC short circuit to GND, to VS,
across the speaker, a SOFT SHORT condition is signaled out during the TURN-ON PHASE
so assuring correct operation for the device itself and for the loudspeaker. This particular
SHAOXING SILICORE TECHNOLOGY CO.,LTD
www. Silicore. com. cn
CHMC
5/11
5 Page 
Silicore
Stereo/Bridge:
OUTLINE DRAWING
HZIP15
D7377
Unit: mm
SHAOXING SILICORE TECHNOLOGY CO.,LTD
www. Silicore. com. cn
CHMC
11/11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet D7377.PDF ] | |
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