TDA7572 STMicroelectronics, TDA7572 Datasheet - Page 54

• Manufacturer Part Number: TDA7572
• Description: IC AMP PWM 200W BRIDGE 64HIQUAD
• Manufacturer: STMicroelectronics
• Type: Class Dr

Specifications of TDA7572

• Output Type: 1-Channel (Mono)
• Voltage - Supply: 8 V ~ 58 V
• Features: Digital Inputs, I²C, I²S, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: 64-HiQUAD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Max Output Power X Channels @ Load: -

Under voltage lock out (UVLO)
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12.1
12.2
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Under voltage lock out (UVLO)
The UVLO lock at the voltage references value used to run the device. If some of them are
not in the rate band the system is put in tristate or in stand-by. The Auto-mute Voltage
Setting pin (pin56) voltage is used to define the limits of this voltage references.
List of monitored pin:
1.
2.
3.
4.
5.
In the UVLO could be defined four blocks:
VSP-UVLO
This block monitors the VSP-VSM drop and eventually moves the modulator in mute or in
tristate. The limits imposed by the VSP-UVLO block are principally three:
1.
2.
3.
The adjustable limits are obtained by means of the reference voltage present on the
AutomuteVSetting pin, which is fixed by means of a ladder resistor of R1 and R2 between
VP2.5 and SVR.
The comparators that sense the voltage drop for the auto mute are provided of hysteresis.
An hysteresis is still present for the auto-tristate and expressed in the spec as two different
thresholds that are function of reference voltage and slope polarity.
V14 - UVLO
This block monitors the V14-VSM drop voltage and eventually moves the modulator in mute
or in tristate. The V14-UVLO block fixes a limit on the minimum drop.
An hysteresis is present for the auto-tristate and expressed in the spec as two different
thresholds that are function of slope polarity. An hysteresis is still present for the auto-mute
and expressed in the spec as two different thresholds that are function of auto-tristate
threshold and slope polarity.
MODE0 and MODE1 voltage value
VSP-VSM voltage difference
SVR voltage value
VSP-SVR or VSR-VSM voltage difference
V14 voltage value
–
–
–
–
an adjustable limit on the minimum supply/drop
an adjustable limit on the maximum supply/drop
an absolute limit on the maximum supply
VSP - UVLO
VP2.5/VM2.5 UVLO
V14 - UVLO
SVR - UVLO
TDA7572