1. General Overview & Identification

️· Product: LM759 and LM77000 Power Op Amps (often used interchangeably, but there can be slight variations, like output power).
️· Type: Dual Power Operational Amplifier
️· Key Features: Designed for audio applications, servo systems, and general-purpose power amplification. Known for circuit simplicity.

2. Electrical Specifications & Performance

️· Wattage: 1 Watt of Audio Output (typical).
️· Slew Rate: 9 V/µs (High)
️· 3 dB Power Bandwidth: 85 kHz (Typical)
️· Output Power: Varies based on load impedance (e.g., 0.18W into 4Ω, 1.44W into 32Ω)
️· Voltage Output: Varies based on load impedance.
️· Supply Voltage: Typically 9-25V, depending on specific application.
️· Input/Output: Designed for handling audio and control signals.
️· Offset Null Circuit: Used for precise adjustments and improvements
️· Bi-Directional Intercom: Single two-wire cable

3. Applications (Detailed & Varied)

️· Audio Amplification: General purpose, low-cost phonos, bi-directional intercoms.
️· Servo Systems: DC servo amplifiers (simplicity, reliability).
️· Power Regulation: Adjustable dual tracking regulators, 10 Amp - 12 Volt regulators (with considerations for temperature coefficients).
️· Other: High Slew Rate Power Op Amps

4. Package Options and Thermal Considerations

️· Package Types:
- Metal Can (H/MH): Requires a heat sink (essential for preventing overheating).
- Plastic Package (P/CP): Also requires a heat sink, attached via tab.
️· Thermal Resistance (Important!):
- *iJC* (Junction to Case) is critical for heat sink selection with the Metal Can package.
- *iJA* (Junction to Ambient) is relevant for both packages.
️· Mounting Hints:
- Metal Can: Heat sinks are mandatory. Insulating washers needed between stud mount heat sink and chassis due to internal connection to negative power supply.
- Plastic Package: Heat sinking via tab is required.

5. Key Design Considerations & Notes

️· Heat Dissipation: Always the most important factor when using power op amps. Choose heat sinks to keep junction temperature below 125°C.
️· Power Supply: Choose a supply voltage appropriate for the application (typically 9-25V).
️· Circuit Simplicity: The LM759's design promotes easy and straightforward circuit implementation.
️· Temperature Coefficient: Be mindful of the temperature coefficient of components in regulator applications.
️· Load Impedance: Select appropriate load impedance based on available power.

6. Physical Dimensions & Ordering Information

️· Refer to the included drawings for precise dimensions of Metal Can and Plastic packages.
️· Order numbers: LM759MH/CH/H, LM759CP/LM77000CP
️· NS Package Numbers: H08C, P04A

7. Life Support Policy

️· The LM759/LM77000 are *not* authorized for use in life-support devices without express written approval from National Semiconductor.



In essence, this is a workhorse power op amp known for its versatility and ease of use, but requires attention to thermal management for reliable operation.