PA7375_15 datasheet, PDF - EEWORLD Datasheet

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PA7375_15: Description2 x 35W DUAL/QUAD POWER AMPLIFIER FOR CAR RADIO; File Size400KB，10 Pages; ManufacturerUNISONIC TECHNOLOGIES CO.,LTD; Websitehttp://www.unisonic.com.tw/

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2 x 35W DUAL/QUAD POWER AMPLIFIER FOR CAR RADIO

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UNISONIC TECHNOLOGIES CO., LTD

PA7375

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.

LINEAR INTEGRATED CIRCUIT

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 V

short

– Soft short at turn-on

– Thermal shutdown proximity

Lead-free:

PA7375L

Halogen-free: PA7375G

PROTECTIONS

* Output AC/DC short circuit

– to GND

– to V

– 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

1 of 10

QW-R107-058.B

PA7375

TYPICAL APPLICATION INFORMATION

LINEAR INTEGRATED CIRCUIT

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)

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 C

OUT

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 V

S 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

5 of 10

QW-R107-058.B

PA7375_15 Related Products

	PA7375_15	PA7375-J15-D-T	PA7375G-J15-D-T	PA7375L-J15-D-T
Description	2 x 35W DUAL/QUAD POWER AMPLIFIER FOR CAR RADIO	2 x 35W DUAL/QUAD POWER AMPLIFIER FOR CAR RADIO	2 x 35W DUAL/QUAD POWER AMPLIFIER FOR CAR RADIO	2 x 35W DUAL/QUAD POWER AMPLIFIER FOR CAR RADIO

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