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PDF PA7375 Data sheet ( Hoja de datos )
| Número de pieza | PA7375 | |
| Descripción | 2 x 35W DUAL/QUAD POWER AMPLIFIER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PA7375 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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UNISONIC TECHNOLOGIES CO., LTD
PA7375
LINEAR INTEGRATED CIRCUIT
2 x 35W DUAL/QUAD POWER
AMPLIFIER FOR CAR RADIO
DESCRIPTION
The UTC PA7375 is a class AB car radio amplifier for car
radio, it can 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 few external components.
The on-board 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.
FEATURES
* High output power capability:
– 2 x 40W Max. / 4Ω
– 2 x 25W / 4Ω@14.4V, 1KHz, 10%
– 2 x 35W / 4Ω EIAJ
– 4 x 7 W / 4Ω@14.4V, 1KHz, 10%
– 4 x 12W / 2Ω@14.4V, 1KHz, 10%
* Minimum external components:
– No bootstrap capacitors
– No Boucherot cells
– Internally fixed gain (26dB BTL)
* Stand-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
Lead-free: PA7375L
Halogen-free: PA7375G
PROTECTIONS
* 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 voltages urge
* Very inductive loads
* Fortuitous open GND
* Reversed battery
* ESD
ORDERING INFORMATION
Normal
PA7375-J15-D-T
Ordering Number
Lead Free Plating
PA7375L-J15-D-T
Halogen Free
PA7375G-J15-D-T
Package
HZIP-15D
Packing
Tube
www.unisonic.com.tw
Copyright © 2008 Unisonic Technologies Co., Ltd
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QW-R107-058.B
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PA7375
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION INFORMATION
High Application Flexibility
To avoid phase inconveniences causing sound alterations especially during the reproduction of low frequencies.
The polarity of the speakers driven by the inverting amplifier must be reversed respect to those driven by non
inverting channels when working in single ended conditions.
Easy Single Ended to Bridge Transition
The change from single ended to bridge configurations is made by a short circuit across the inputs.
Gain Internally Fixed to 20dB in Single Ended, 26dB in Bridge
The function advantages: save component, PCB space and optimize output noise, supply voltage rejection and
distortion
Silent Turn On/Off and Muting/Stand-by Function
At turn-on the device stays in muting condition for a time. The device outputs becomes insensitive to any kinds
of signal that may be present at the input terminals while in muting.
STAND-BY DRIVING
The stand by pin cannot be directly driven by a voltage source whose current capability is higher than 5mA. A
series resistance has been inserted to limit the current at this pin and to smooth down the stand-by ON/OFF
transitions. To ensure correct turn-on, a capacitor of at least 100nF from pin 7 to S-GND, with no resistance in
between.
BUILT–IN SHORTCIRCUIT PROTECTION
To assure correct operation for the device itself and for the loudspeaker, a SOFT SHORT condition is signaled
out during the TURN-ON PHASE .
That acts in a way to avoid that the device is turned on (by ST-BY) when a resistive path (less than 16 Ω) is
present between the output and GND. When a current higher than 5mA is flowing into the ST-BY pin the
involved circuitry is normally disabled.
That extra function becomes particularly attractive when, in the single ended configuration
So if the output capacitor COUT for any reason is shorted, the loudspeaker will not be damaged.
Diagnostics Facility
The IC is equipped with a diagnostic circuitry able to detect the information(clipping in the output signal,
thermal shutdown, and output fault including short to GND, short to VS and soft short at turn on) across an
open collector output (pin 10) through a current sinking when the event is detected.
Clipping Detection Waveforms
When a certain distortion level is reached at any of the outputs a current sinking at pin 10 is triggered.
Whenever the amplifier is overdriven this function allows gain compression possibility.
Thermal Shutdown
In this case the output 10 will signal the proximity of the junction temperature to the shutdown threshold.
Typically current sinking at pin 10 will start ~10°C before the shutdown threshold is reached.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet PA7375.PDF ] | |
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