TDA7491HV13TR STMicroelectronics, TDA7491HV13TR Datasheet - Page 38

• Manufacturer Part Number: TDA7491HV13TR
• Description: IC AMP AUD CLASS D BTL PWRSSO36
• Manufacturer: STMicroelectronics
• Type: Class Dr

Specifications of TDA7491HV13TR

• Output Type: 2-Channel
• Max Output Power X Channels @ Load: 20W x 2 @ 8 Ohm
• Voltage - Supply: 5 V ~ 18 V
• Features: Depop, Differential Inputs, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: *
• Amplifier Class: D
• No. Of Channels: 2
• Output Power: 20W
• Supply Voltage Range: 5V To 18V
• Thd + N: 0.1% @ 1W, 8ohm, VCC=18V
• Load Impedance: 8ohm
• Operating Temperature Range: 0°C To +70°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-11055-2

Application information
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Protection function
The TDA7491HV is fully protected against undervoltages, overcurrents and thermal
overloads as explained here.
Undervoltage protection (UVP)
If the supply voltage drops below the value of V
on page 10
high-impedance state. When the supply voltage recovers the device restarts.
Overcurrent protection (OCP)
If the output current exceeds the value for I
page 10
high-impedance state. Periodically, the device attempts to restart. If the overcurrent
condition is still present then the OCP remains active. The restart time, T
by the R-C components connected to pin STBY.
Thermal protection (OTP)
If the junction temperature, T
the positive and negative PWM outputs are forced to 50% duty cycle. If the junction
temperature reaches the value for T
the device shuts down and the output is forced to the high impedance state. When the
device cools sufficiently the device restarts.
Diagnostic output
The output pin DIAG is an open drain transistor. When the protection is activated it is in the
high-impedance state. The pin can be connected to a power supply (<18 V) by a pull-up
resistor whose value is limited by the maximum sinking current (200 µA) of the pin.
Figure 58. Behavior of pin DIAG for various protection conditions
Heatsink requirements
Due to the high efficiency of the class-D amplifier a 2-layer PCB can easily provide the
heatsinking capability for low to medium power outputs.
the overcurrent protection is activated which forces the outputs to the
VDD
the undervoltage protection is activated which forces the outputs to the
Overcurrent
protection
j
, reaches 145 °C (nominal), the device goes to mute mode and
Protection logic
Doc ID 14242 Rev 5
TDA7491HV
j
, given in
Restart
OCP
Table 5: Electrical specifications on page 10
UVP
given in
DIAG
given in
VDD
Table 5: Electrical specifications on
R1
OV, UV, OT
protection
Table 5: Electrical specifications
Restart
OC
, is determined
TDA7491HV