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| Part Number | STA550 | STA500 | STA540 |
|---|---|---|---|
| Manufacturer | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Product Status | Obsolete | Obsolete | Active |
| Type | Class AB | Class D | Class AB |
| Output Type | 2-Channel (Stereo) | 2-Channel (Stereo) or 4-Channel (Quad) | 2-Channel (Stereo) or 4-Channel (Quad) |
| Max Output Power x Channels @ Load | 70W x 2 @ 4Ohm | 60W x 2 @ 8Ohm | 38W x 2 @ 4Ohm; 16W x 4 @ 4Ohm |
| Voltage - Supply | 20V ~ 30V | 10V ~ 36V | 8V ~ 22V |
| Features | Mute, Standby, Thermal Protection | Short-Circuit and Thermal Protection | Short-Circuit and Thermal Protection, Standby |
| Mounting Type | Through Hole | Surface Mount | Through Hole |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) |
| Supplier Device Package | 27-Flexiwatt (Vertical) | PowerSO-36 | 15-Multiwatt |
| Package / Case | 27-Flexiwatt (Formed Leads) | PowerSO-36 Exposed Bottom Pad | Multiwatt-15 (Vertical, Bent and Staggered Leads) |
