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Texas Instruments LM675T/LF02
- Part No.:
- LM675T/LF02
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM675T/LF02.pdf
- Description:
- IC POWER 1 CIRCUIT TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:201
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Product details
Overview
LM675T/LF02 from Texas Instruments is a monolithic power operational amplifier designed for high-current, wide-supply-voltage applications. It delivers >3 A output current, operates from ±16 V to ±30 V (±60 V total), features 5.5 MHz gain bandwidth, 8 V/μs slew rate, and 1 mV typical input offset voltage. It is used in servo amplifiers, motor speed controls, and bridge amplifier circuits requiring robust thermal and short-circuit protection.
For engineers reviewing the LM675T/LF02 datasheet, LM675T/LF02 pinout, LM675T/LF02 application, or LM675T/LF02 equivalent, key selection criteria include output current capability (>3 A), internal SOA protection with voltage-dependent current limiting, TO-220 (NEB) 5-pin package thermal performance, and stability at closed-loop gains ≥10.
Technical Context
The LM675T/LF02 integrates internal output protection diodes, thermal shutdown with parole circuitry (100% tested), and current limiting that reduces trip threshold under high VCE conditions to protect against reactive load faults. Its internal compensation ensures stability for gains ≥10 without external components.
It supports wide common-mode input range (±22 V), exhibits 90 dB PSRR and CMRR, and maintains ±21 V output swing into 8 Ω at ±25 V supplies. The device's 30 W maximum power dissipation (at TA = 70°C) requires mandatory heatsinking due to θJA = 54°C/W in TO-220 (NEB) package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±16 V to ±30 V (±60 V total); enables operation in industrial DC bus and split-rail power systems |
| Output Current | >3 A continuous; supports driving low-impedance loads like motors and loudspeakers directly |
| Gain Bandwidth | 5.5 MHz; allows stable closed-loop operation up to ~550 kHz at gain = 10 |
| Slew Rate | 8 V/μs; limits full-power bandwidth to ~127 kHz at ±21 V swing, suitable for audio and control signals |
| Input Offset Voltage | 1 mV typical; contributes ≤21 mV error at unity gain into 8 Ω, critical for precision servo feedback |
| Thermal Shutdown | Activates at 170°C junction; re-enables at 145°C with reduced trip point (150°C) for sustained fault tolerance |
| Current Limit | ~4 A nominal, voltage-dependent; prevents transistor damage during inductive kickback or shorted loads |
Pinout & Package
LM675T/LF02 uses the TO-220 (NEB) 5-pin plastic power package. The metal tab is internally connected to pin 3 (V–), providing direct thermal path and electrical grounding when mounted to heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−) | Differential input node; high-impedance (0.2 μA bias current) for feedback network connection |
| 2 | Non-Inverting Input (+) | Differential input node; accepts reference or sensor signal with ±22 V common-mode range |
| 3 | V– (Negative Supply) | Internal connection to metal tab; must be thermally and electrically tied to heatsink ground plane |
| 4 | Output | Class AB output stage capable of sourcing/sinking >3 A; includes internal clamp diodes to rails |
| 5 | V+ (Positive Supply) | High-voltage rail input; supports up to +30 V relative to pin 3, enabling wide dynamic range |
Key Features
| Feature | Design Value |
|---|---|
| Internal SOA Protection | Voltage-dependent current limiting prevents secondary breakdown during reactive load transients |
| Thermal Parole Circuit | 100% tested shutdown with hysteresis (170°C trip / 145°C restart → 150°C sustained trip) improves reliability under intermittent overload |
| Wide Supply Range | ±16 V to ±30 V operation supports legacy 24 V/48 V industrial buses and high-voltage audio rails |
| Output Clamp Diodes | Integrated rail-to-output diodes eliminate need for external flyback protection in motor/servo drive outputs |
| Unity-Gain Stable | Internally compensated for gains ≥10; avoids instability in high-gain instrumentation and control loops |
Applications
| Servo Motor Control | Bridge Audio Amplifier |
|---|---|
Use Scenario: Precision position control loop for industrial robotic joints using analog feedback from potentiometers or resolvers. IC Role / Device Role / Timing Role: Power error amplifier converting position error voltage into high-current drive for DC servo motor windings. Use Value: 1 mV offset and 90 dB CMRR minimize static positioning error; SOA protection handles back-EMF spikes during rapid direction reversal. | Use Scenario: High-fidelity 25 W stereo output stage in professional audio equipment operating from ±24 V rails. IC Role / Device Role / Timing Role: Single-ended output driver in non-inverting configuration, delivering low-distortion output into 8 Ω speakers. Use Value: 8 V/μs slew rate and 5.5 MHz GBW preserve transient response; internal diodes prevent latch-up during speaker cable shorts. |
| Motor Speed Controller | High-Current Source/Sink |
Use Scenario: Closed-loop RPM regulation for 24 V brushed DC conveyor motors in packaging machinery. IC Role / Device Role / Timing Role: Current-mode amplifier translating PWM-filtered DAC voltage into proportional motor winding current. Use Value: >3 A output sustains 100% torque at stall; thermal parole allows brief overloads during acceleration without shutdown. | Use Scenario: Programmable current source for LED array testing or electrochemical cell biasing requiring 0–3 A adjustable output. IC Role / Device Role / Timing Role: Transconductance amplifier with precision shunt-sense feedback, configured as grounded-load current source. Use Value: 1 mV offset and 0.2 μA bias current ensure <0.1% full-scale error at 1 A; SOA protection guards against open-load transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM675T/NOPB | Same die, TO-220 (NDH) package with different leadframe geometry; identical electrical specs and thermal resistance (θJC = 2°C/W) | No functional difference; NDH variant has slightly different mechanical footprint and mounting hole alignment | Select LM675T/NOPB only if legacy PCB layout matches NDH0005D mechanical drawing |
| LM12CL | Higher output current (13 A), wider supply (±15 V to ±40 V), but larger TO-3 package and higher quiescent current (40 mA vs 18 mA) | Better suited for ultra-high-current applications (e.g., linear actuator drives), less optimal for space-constrained designs | Choose LM12CL when >5 A peak current or >40 V supply is required; LM675T/LF02 remains preferred for 3–5 A, TO-220 footprint designs |
Compared with LM675T/NOPB and LM12CL, the LM675T/LF02 offers optimal balance of 3 A output, TO-220 (NEB) mountability, and 18 mA quiescent current-making it ideal for cost-sensitive, medium-power industrial control where board space and thermal management are constrained.
Availability
LM675T/LF02 is available at Aetrix Electronics and suitable for servo motor control, bridge audio amplification, and industrial motor speed regulation requiring stable component supply across extended production lifecycles.
Supply support for LM675T/LF02 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and digital signal technologies with broad industrial and automotive focus.
The LM675 product line delivers high-current, high-voltage operational amplifiers for precision power control in servo systems, motor drives, and instrumentation-designed for ruggedness, thermal resilience, and ease of implementation in demanding analog signal chains.
FAQ
What is the maximum safe operating supply voltage for LM675T/LF02?
The LM675T/LF02 has an absolute maximum supply voltage rating of ±30 V (60 V total). Operation beyond this risks permanent damage. Electrical characteristics are specified up to ±25 V, and design margin should maintain at least ±2 V headroom below ±30 V to accommodate ripple and transients. Always verify actual rail voltages under load before finalizing the LM675T/LF02 design.
Does LM675T/LF02 require external compensation capacitors?
No, the LM675T/LF02 is internally compensated for closed-loop gains of 10 or greater and does not require external compensation. However, stability in high-gain or capacitive-load configurations depends on proper PCB layout: separate low-level and high-current ground returns, short traces to 0.1 μF decoupling caps, and minimized input/output coupling. External compensation is neither recommended nor needed for standard applications per the LM675T/LF02 datasheet.
How is thermal protection implemented in LM675T/LF02?
The LM675T/LF02 implements thermal protection via a parole circuit that shuts down the output at 170°C junction temperature and re-enables operation at ~145°C. If overheating persists, the trip threshold lowers to 150°C to reduce thermal cycling stress. This circuit is 100% tested without heatsink. For reliable operation, the LM675T/LF02 must be mounted on a heatsink sized to keep TJ < 150°C at maximum ambient (70°C) and load conditions.
Can LM675T/LF02 drive capacitive loads directly?
The LM675T/LF02 can drive capacitive loads up to ~2 μF without oscillation, but direct connection to >0.1 μF capacitance may cause ringing in square-wave response. For stable operation with capacitive loads (e.g., long cables or piezoelectric actuators), TI recommends adding a series resistor ≥1 Ω at the LM675T/LF02 output. This isolates the capacitance from the output stage and preserves phase margin.
What is the function of the metal tab on LM675T/LF02?
The metal tab on the LM675T/LF02 is internally connected to pin 3 (V–) and serves as both the primary thermal conduction path and an electrical node. It must be electrically bonded to the system ground plane through the heatsink-using appropriate insulating hardware (e.g., mica washer + thermal grease) if isolation from chassis ground is required. Failure to thermally and electrically manage the tab risks thermal runaway or ground loop errors in the LM675T/LF02 circuit.
LM675T/LF02 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Power
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 8V/µs
- Gain Bandwidth Product:
- 5.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 18mA
- Current - Output / Channel:
- 3 A
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 60 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
LM675T/LF02 FAQ
1.How can I place an order for LM675T/LF02 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM675T/LF02 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM675T/LF02 reliable?
The price and inventory of LM675T/LF02 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM675T/LF02 is usually 5 days.
3.What payment methods are accepted for LM675T/LF02?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM675T/LF02 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM675T/LF02?
LM675T/LF02 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM675T/LF02 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM675T/LF02?
For technical support, including LM675T/LF02 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM675T/LF02 requirements.
6.How does Aetrix verify that LM675T/LF02 is sourced from the original manufacturer or authorized distributors?
All LM675T/LF02 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM675T/LF02 meets industry standards.
7.What is the process for return or replacement of LM675T/LF02?
All LM675T/LF02 units undergo pre-shipment inspection (PSI). If there is an issue with LM675T/LF02, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM675T/LF02 part is unused and in its original packaging.
Return procedure for LM675T/LF02:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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