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STMicroelectronics L165H
- Part No.:
- L165H
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- Pentawatt-5 (Horizontal, Bent and Staggered Leads)
- Datasheet:
-
L165H.pdf
- Description:
- IC POWER 1 CIRCUIT 5PENTAWATT
- Quantity:
- Payment:
- Shipping:
Inventory:3,841
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Product details
Overview
L165H from STMicroelectronics is a 3A monolithic power operational amplifier in Pentawatt® package, designed as a high-output voltage/current gain stage for servo amplifiers, motor control, and regulated power supplies. It delivers ±24Vpp output swing at 3A load, 8 V/µs slew rate, and integrated SOA + thermal shutdown protection.
For engineers reviewing the L165H datasheet, L165H pinout, L165H application, or L165H equivalent, key selection criteria include safe operating area compliance, ±18V dual-supply operation, 3.5A peak current capability, and TTL/CMOS-compatible input logic thresholds in bidirectional motor drive configurations.
Technical Context
The L165H implements a fully protected bipolar power op-amp architecture with complementary Darlington output transistors, internal current limiting, and thermal foldback triggered at 110°C (Ptot = 12W) or 130°C (Ptot = 6W). Its open-loop gain exceeds 80 dB and common-mode rejection is ≥70 dB with Rg ≤ 10 kΩ.
It supports unity-gain and gain >10 stable configurations per Figures 1–2, operates across ±6V to ±18V supply range, and maintains 6 V/µs slew rate at Gv = 1 while delivering 27 Vpp into 0.3A loads at 1 kHz - critical for precision tracking regulators and square-wave oscillators with independent frequency/duty-cycle tuning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3 A continuous, 3.5 A peak - enables direct drive of 4Ω loads or external transistor bases without buffer stages |
| Supply Voltage | ±6 V to ±18 V - supports industrial ±15V rails and extended-range ±18V systems |
| Slew Rate | 8 V/µs at Gv = 10 - ensures fidelity in 10 kHz large-signal motor control waveforms |
| Input Offset Voltage | ±2 mV typical - minimizes DC error in precision servo position loops |
| Thermal Shutdown | 110°C at 12 W dissipation - protects against sustained overload in enclosed enclosures |
| SOA Protection | Internally enforced - eliminates need for external foldback circuitry in linear regulator designs |
| Common-Mode Range | ±15 V differential, full VS common-mode - allows direct sensing in high-side current monitor topologies |
Pinout & Package
Pentawatt® V package (vertical mounting, 5-pin, TO-220 compatible outline), 2.00 g weight, thermal resistance junction-to-case max 3 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input | High-impedance node (100–500 kΩ) accepting ±15 V differential input; referenced to ground in standard configurations |
| 2 | Non-Inverting Input | DC-coupled input with 0.2–1 µA bias current; compatible with TTL/CMOS logic levels when used with resistor dividers |
| 3 | Negative Supply (–VS) | Connects to –18 V rail; shares thermal path with case via internal metal tab |
| 4 | Output | Capable of ±24 Vpp swing into 3A load; drives external power transistors or low-impedance motors directly |
| 5 | Positive Supply (+VS) | Connects to +18 V rail; internally tied to upper Darlington emitter for rail-to-rail output headroom |
Key Features
| Feature | Design Value |
|---|---|
| Integrated SOA protection | Prevents second breakdown during transient overloads without external sensing resistors or compensation networks |
| Thermal shutdown with hysteresis | Auto-recovery after cooldown avoids latch-up in intermittent duty-cycle applications like PWM motor drivers |
| Wide supply range (±6 V to ±18 V) | Eliminates need for separate ±15V and ±12V supply rails in mixed-signal industrial controllers |
| High open-loop gain (80 dB) | Enables <0.1% closed-loop error in 30 dB gain configurations for analog feedback regulation |
| TTL/CMOS-compatible inputs | Accepts 0–5 V logic signals directly - simplifies interface with microcontrollers in bidirectional DC motor control (Fig. 9) |
Applications
| Bidirectional DC Motor Control | High-Current Tracking Regulator |
|---|---|
Use Scenario: Driving 24V brushed DC motors in robotics or actuator systems requiring forward/reverse motion and current limiting. IC Role / Device Role / Timing Role: Power op-amp configured as bidirectional H-bridge driver with TTL/CMOS-compatible inputs (Fig. 9); provides ±3A output with SOA-limited current foldback. Use Value: Eliminates discrete transistor arrays and external current-sense amplifiers - reduces BOM count by ≥4 components per channel. | Use Scenario: Precision linear voltage regulation for test equipment requiring low-noise, high-stability output under variable load (e.g., 0–5A, 0–30V). IC Role / Device Role / Timing Role: Error amplifier and pass element driver in series regulator topology (Fig. 11); compensates for load-induced Vdrop using internal gain and slew performance. Use Value: Maintains <0.5% line/load regulation with 6 V/µs response to 100 mA step loads - outperforms standard op-amps lacking SOA protection. |
| Power Square-Wave Oscillator | Split-Supply Signal Generator |
Use Scenario: Generating adjustable-frequency, variable-duty-cycle square waves for timing reference or gate drive in power converters. IC Role / Device Role / Timing Role: High-slew comparator + integrator core (Fig. 14); uses external P1/P2 potentiometers for independent frequency (700 Hz–25 Hz) and duty-cycle tuning. Use Value: Achieves <5% duty-cycle error across 10:1 frequency range without trimming - enabled by stable 8 V/µs slew and low input offset. | Use Scenario: Providing symmetrical ±15V analog signal paths in audio preamplifiers or sensor front-ends requiring balanced AC coupling. IC Role / Device Role / Timing Role: Dual-rail power op-amp in split-supply configuration (Fig. 13); delivers rail-symmetric output swing up to ±24Vpp into 3A loads. Use Value: Enables true bipolar signal handling without virtual-ground circuits - preserves SNR in low-distortion audio stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM12CL | Higher 13A output, wider ±40V supply, but requires external SOA protection and heatsink mounting | Used in high-power audio amplifiers and lab-grade power supplies where L165H's 3A limit is insufficient | Select LM12CL only when >5A peak current and >100W dissipation capability are required; adds design complexity |
| TCA0372 | Lower 1.5A output, no thermal shutdown, 2.5 V/µs slew rate, SOIC-8 package | Targeted at space-constrained PCBs with moderate current needs (e.g., sensor excitation, small actuators) | Choose TCA0372 for compact surface-mount layouts where thermal management is externally controlled |
Compared with LM12CL and TCA0372, the L165H uniquely balances integrated protection, through-hole Pentawatt® thermal performance, and 3A drive in a single monolithic device - making it optimal for cost-sensitive, medium-power industrial motor and regulator designs where reliability trumps raw output rating.
Availability
L165H is available at Aetrix Electronics and suitable for bidirectional motor control, high-current tracking regulators, power oscillator circuits, and split-supply analog signal generation requiring stable component supply and long-term industrial availability.
Supply support for L165H 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
The L165H belongs to ST's legacy power operational amplifier product line, engineered specifically for robust linear power amplification in servo systems, motor drives, and programmable power supplies where integrated protection and wide supply tolerance are mandatory.
FAQ
What is the maximum safe operating voltage for L165H?
The L165H supports ±18 V supply rails per absolute maximum ratings, with ±36 V collector-emitter voltage tolerance on internal output transistors. Operation beyond ±18 V risks permanent damage even with thermal protection active, as SOA limits are defined within the ±18 V envelope.
Can L165H be used in single-supply configurations?
No - the L165H is strictly a dual-supply device requiring symmetrical ±VS connections. Its input common-mode range and output swing are specified only for split-rail operation; single-supply use violates biasing requirements and disables internal protection circuitry.
Does L165H require external compensation capacitors?
Stable unity-gain operation is achieved without external compensation (Figure 2), but gain >10 configurations (Figure 1) require a 100 pF capacitor between pins 1 and 2 per datasheet guidance. Omitting this capacitor causes peaking or oscillation above 100 kHz.
How does thermal shutdown behave under pulsed load conditions?
Thermal shutdown activates at case temperatures of 110°C (at 12 W dissipation) or 130°C (at 6 W), with hysteresis ensuring ~20°C recovery margin. Under pulsed loads, it responds to average junction temperature - not instantaneous peaks - making it effective for repetitive 100 ms on/off motor cycles but not sub-millisecond transients.
L165H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- Pentawatt-5 (Horizontal, Bent and Staggered Leads)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Power
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 8V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 40mA
- Current - Output / Channel:
- 3.5 A
- Voltage - Supply Span (Min):
- 12 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 5-PENTAWATT
L165H FAQ
1.How can I place an order for L165H through Aetrix?
Please submit a Request for Quotation (RFQ) for L165H 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 L165H reliable?
The price and inventory of L165H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L165H is usually 5 days.
3.What payment methods are accepted for L165H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L165H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L165H?
L165H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L165H 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 L165H?
For technical support, including L165H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L165H requirements.
6.How does Aetrix verify that L165H is sourced from the original manufacturer or authorized distributors?
All L165H 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 L165H meets industry standards.
7.What is the process for return or replacement of L165H?
All L165H units undergo pre-shipment inspection (PSI). If there is an issue with L165H, 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 L165H part is unused and in its original packaging.
Return procedure for L165H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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