STA540 STMicroelectronics, STA540 Datasheet - Page 18

• Manufacturer Part Number: STA540
• Description: IC AMP AUD DUAL/QUAD MULTIWATT15
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of STA540

• Output Type: 2-Channel (Stereo) or 4-Channel (Quad)
• Max Output Power X Channels @ Load: 38W x 2 @ 4 Ohm; 16W x 4 @ 4 Ohm
• Voltage - Supply: 8 V ~ 22 V
• Features: Short-Circuit and Thermal Protection, Standby
• Mounting Type: Through Hole
• Package / Case: Multiwatt-15 (Vertical, Bent and Staggered Leads)
• Amplifier Class: AB
• No. Of Channels: 4
• Output Power: 24W
• Supply Voltage Range: 8V To 22V
• Thd + N: 0.02% @ 4W, 4ohm, VS=14.4V
• Load Impedance: 8ohm
• Operating Temperature Range: -40°C To +150°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8880-5

Practical information
6.7.3
6.7.4
18/23
Clipping detection
Figure 24. Clipping detection waveforms
Current sinking at pin 10 occurs when a certain distortion level is reached at each output.
This function initiates a gain-compression facility whenever the amplifier is overdriven.
Thermal shutdown
With the thermal shutdown feature, the diagnostics output (pin 10) signals the closeness of
the junction temperature to the shutdown threshold. Typically, current sinking at pin 10 starts
approximately 10° C before the shutdown temperature is reached.
Figure 25. Output fault waveforms (see
Figure 26. Fault waveforms
WAVEFORM
ST-BY PIN
VOLTAGE
OUTPUT
Vpin 10
2V
CHECK AT TURN-ON
(TEST PHASE)
CORRECT TURN-ON
OUT TO GND SHORT
Figure
FAULT DETECTION
OUT TO Vs SHORT
SOFT SHORT
D05AU1603mod
26)
SHORT TO GND
OR TO Vs
t
t
t
STA540