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| Part Number | LM4991LDX/NOPB | LM4990LDX/NOPB | LM4991LD/NOPB |
|---|---|---|---|
| Manufacturer | National Semiconductor | Texas Instruments | Texas Instruments |
| Product Status | Active | Obsolete | Active |
| Type | Class AB | Class AB | Class AB |
| Output Type | 1-Channel (Mono) | 1-Channel (Mono) | 1-Channel (Mono) |
| Max Output Power x Channels @ Load | 3W x 1 @ 3Ohm | 2W x 1 @ 4Ohm | 3W x 1 @ 3Ohm |
| Voltage - Supply | 2.2V ~ 5.5V | 2.2V ~ 5.5V | 2.2V ~ 5.5V |
| Features | Depop, Shutdown, Thermal Protection | Depop, Shutdown | Depop, Shutdown, Thermal Protection |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Supplier Device Package | 8-WSON (4x4) | 10-WSON (3x4) | 8-WSON (4x4) |
| Package / Case | 8-WDFN Exposed Pad | 10-WFDFN Exposed Pad | 8-WDFN Exposed Pad |
