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Texas Instruments LM675T/LF05
- Part No.:
- LM675T/LF05
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM675T/LF05.pdf
- Description:
- IC POWER 1 CIRCUIT TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,842
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Product details
Overview
LM675T/LF05 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 (±30 V absolute max), features 5.5 MHz gain bandwidth, 8 V/μs slew rate, and 1 mV typical input offset voltage. It serves as a high-power analog signal amplifier in motor control, servo systems, and bridge audio amplifiers.
For engineers reviewing the LM675T/LF05 datasheet, LM675T/LF05 pinout, LM675T/LF05 application, or LM675T/LF05 equivalent, key selection considerations include thermal shutdown behavior, internal current limiting at ~4 A, TO-220 (NEB) 5-pin package with tab-connected pin 3, and stability requirements for closed-loop gains ≥10.
Technical Context
The LM675T/LF05 integrates internal output protection diodes, short-circuit protection, and a thermally protected "parole" shutdown circuit tested at 100%. Its internal compensation ensures stability at closed-loop gains of 10 or greater, avoiding external compensation in most configurations.
It supports wide common-mode input range (±22 V typical), exhibits 90 dB PSRR and CMRR, and maintains ±21 V output swing into 8 Ω at ±25 V supplies. The device's SOA protection dynamically reduces current limit under high VCE conditions to prevent transistor damage during reactive load transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±16 V to ±30 V - enables use in industrial DC power rails up to 60 V total span |
| Output Current | >3 A continuous - drives low-impedance loads like 8 Ω speakers or motor windings directly |
| Gain Bandwidth | 5.5 MHz - supports stable closed-loop operation up to ~550 kHz at gain = 10 |
| Slew Rate | 8 V/μs - limits full-power bandwidth to ~1.3 MHz at 20 VPP, suitable for audio and control signals |
| Input Offset Voltage | 1 mV typical - contributes ≤0.1% error in unity-gain precision DC applications |
| Thermal Shutdown | 170°C trip, 145°C restart - prevents permanent die damage during sustained overload |
| PSRR / CMRR | 90 dB typical - rejects supply noise and common-mode interference in noisy industrial environments |
Pinout & Package
LM675T/LF05 uses the TO-220 (NEB) 5-pin plastic power package. The metal tab is internally connected to pin 3 (V−), requiring electrical isolation when mounted to heatsinks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−) | Differential input node; connects to feedback network in inverting configurations |
| 2 | Non-Inverting Input (+) | Differential input node; referenced to ground or bias network in non-inverting setups |
| 3 | Negative Supply (V−) | Internally tied to metal tab; must be isolated from heatsink unless tab is grounded |
| 4 | Output | High-current output stage; capable of sourcing/sinking >3 A into resistive or reactive loads |
| 5 | Positive Supply (V+) | High-voltage rail input; supports up to +30 V relative to V− |
Key Features
| Feature | Design Value |
|---|---|
| Internal Output Protection Diodes | Eliminates need for external clamp diodes when driving inductive loads like motors or relays |
| Thermal Parole Circuit | Allows temporary overheating to 170°C then locks at 150°C for sustained faults-reduces thermal cycling stress |
| Short-Circuit Protection | Current-limited to ~4 A with foldback behavior under high VCE-prevents latch-up and second breakdown |
| Wide Common-Mode Range | ±22 V input range enables direct sensing across high-side shunts or floating sensor bridges |
| Unity-Gain Stable ≥10 | Internally compensated for minimum gain of 10-no external compensation required in standard configurations |
Applications
| Bridge Audio Amplifier | DC Motor Speed Control |
|---|---|
Use Scenario: Driving 4–8 Ω loudspeakers in high-fidelity or PA systems using dual LM675T/LF05 in bridged-tied-load (BTL) configuration. IC Role / Device Role / Timing Role: High-current output stage delivering up to 25 W per channel into 8 Ω with <1% THD at 1 kHz. Use Value: Eliminates need for discrete output transistors while maintaining low distortion and thermal reliability via integrated SOA protection. | Use Scenario: Closed-loop speed regulation of brushed DC motors in industrial automation, using LM675T/LF05 as current-source driver with tachometer feedback. IC Role / Device Role / Timing Role: Precision current amplifier converting 0–5 V control signal to 0–3 A motor drive current (2.5 A/V scaling). Use Value: Internal current limiting and thermal shutdown protect motor and driver during stall or jam conditions without external sensing circuitry. |
| Servo Position Amplifier | High-Voltage Instrumentation Source |
Use Scenario: Driving torque motors or voice-coil actuators in precision positioning systems requiring fast settling and low drift. IC Role / Device Role / Timing Role: High-slew-rate, low-offset amplifier in position loop output stage with ±25 V supplies and 1 mV offset. Use Value: 8 V/μs slew rate enables sub-10 μs step response; 25 μV/°C offset drift ensures long-term positional accuracy over temperature. | Use Scenario: Generating calibrated, high-stability current sources for sensor excitation (e.g., RTDs, strain gauges) in test equipment. IC Role / Device Role / Timing Role: Precision transconductance amplifier delivering 0–100 mA with <0.1% linearity error over ±25 V supply range. Use Value: 90 dB PSRR and CMRR reject supply ripple and ground noise, critical for sub-millivolt measurement integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM675N/NOPB | TO-220 (NDH) package; same electrical specs but different mechanical footprint and tab connection (also pin 3) | Same functional use, but NDH variant has slightly different mounting hole spacing and thermal interface geometry | Select LM675N/NOPB only if legacy NDH heatsink compatibility is required |
| OPA548TP | Higher 8 A output current, 10 MHz GBW, wider −40°C to +85°C temp range, but requires external compensation for gains <10 | Better suited for wide-temperature or higher-bandwidth servo loops; not drop-in due to compensation and layout sensitivity | Choose OPA548TP when >3 A peak current or extended temperature operation is mandatory |
Compared with LM675T/LF05, LM675N/NOPB offers identical performance in a mechanically distinct TO-220 variant, while OPA548TP provides higher current and bandwidth at the cost of added design complexity and no internal unity-gain stability.
Availability
LM675T/LF05 is available at Aetrix Electronics and suitable for industrial motor controls, audio power stages, servo amplifiers, and high-voltage instrumentation requiring stable component supply and long-life availability.
Supply support for LM675T/LF05 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 power management ICs with decades of leadership in high-reliability op-amps and power solutions.
The LM675 product line delivers robust, high-current operational amplifiers optimized for industrial motion control, audio, and precision analog power stages where thermal resilience and fault tolerance are critical.
FAQ
What is the maximum safe operating supply voltage for LM675T/LF05?
The LM675T/LF05 has an absolute maximum supply voltage rating of ±30 V (60 V total). Operation beyond this risks permanent damage. For reliable long-term use, TI recommends staying within ±25 V under typical thermal conditions with adequate heatsinking. Derating is required above ambient temperatures of 70°C or when power dissipation exceeds 30 W.
Does LM675T/LF05 require external compensation capacitors?
No - the LM675T/LF05 is internally compensated for closed-loop gains of 10 or greater. Using it at lower gains (e.g., unity gain or gain = 2) may cause instability and oscillation. If lower gain is needed, external compensation (e.g., dominant-pole capacitor) must be added per TI Application Hints. The LM675T/LF05 datasheet explicitly states internal compensation applies only for AV ≥ 10.
How is the metal tab connected on LM675T/LF05, and what does that mean for heatsink mounting?
The metal tab of the LM675T/LF05 is internally connected to pin 3 (V−). This means the tab is electrically live at the negative supply potential. When mounting to a heatsink, electrical isolation (e.g., mica washer + thermal grease) is mandatory unless the heatsink itself is biased to V−. Failure to isolate may cause short circuits or ground loops in the system.
What thermal protection behavior does LM675T/LF05 exhibit during overload?
The LM675T/LF05 features a two-tier thermal protection scheme: it shuts down at 170°C junction temperature and resumes operation at ~145°C. If overheating persists, the trip point lowers to 150°C to reduce thermal cycling stress. This "parole" behavior is 100% factory tested and allows brief transient overloads while protecting against sustained faults - a key reliability feature of the LM675T/LF05.
Can LM675T/LF05 drive capacitive loads, and what precautions apply?
The LM675T/LF05 is not optimized for highly capacitive loads. Direct connection to >0.1 μF causes ringing; loads >2 μF risk oscillation. TI recommends adding a series resistor (≥1 Ω) between LM675T/LF05 output and capacitive load. For demanding cases, a 10 Ω resistor in parallel with a 5 μH inductor provides effective high-frequency isolation without compromising low-frequency response.
LM675T/LF05 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/LF05 FAQ
1.How can I place an order for LM675T/LF05 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM675T/LF05 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/LF05 reliable?
The price and inventory of LM675T/LF05 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM675T/LF05 is usually 5 days.
3.What payment methods are accepted for LM675T/LF05?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM675T/LF05 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM675T/LF05?
LM675T/LF05 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM675T/LF05 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/LF05?
For technical support, including LM675T/LF05 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM675T/LF05 requirements.
6.How does Aetrix verify that LM675T/LF05 is sourced from the original manufacturer or authorized distributors?
All LM675T/LF05 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/LF05 meets industry standards.
7.What is the process for return or replacement of LM675T/LF05?
All LM675T/LF05 units undergo pre-shipment inspection (PSI). If there is an issue with LM675T/LF05, 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/LF05 part is unused and in its original packaging.
Return procedure for LM675T/LF05:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM675T/LF05 Tags
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