OPA549S - 8A High-Voltage Power Op Amp | Texas Instruments
MPN: OPA549S ✓ نشطOPA549S نظرة عامة
An operational amplifier, or op amp, is a high-gain analog signal-conditioning device that controls the voltage applied to its output so that the output follows the differential voltage presented to its inputs. The OPA549 belongs to the power-operational-amplifier hierarchy: op amp → power op amp → high-voltage amplifier → analog semiconductor. Unlike ordinary precision or low-noise op amps, this device is designed to source or sink substantial current while operating across a wide supply-voltage range.
The OPA549S provides 8 A continuous and 10 A peak current capability, a single-supply operating range extending to +60 V, and a dual-supply range of ±30 V. Its wide output-voltage swing is useful when the amplifier must provide a large load current close to its supply rails. Fully integrated protection includes thermal shutdown and adjustable current limiting, while the output-disable control allows the output to be electrically turned off during selected operating states.
The architecture is suitable for voltage-feedback operation because the device combines relatively high gain-bandwidth product with high output-current capability. This allows it to amplify low-level control signals while driving external power stages, motors, solenoids, lamps, and other low-impedance loads. Designers must account for the large power dissipation created when output current and supply-to-output voltage differential are simultaneously high.
Typical applications include motor and actuator drivers, laboratory power stages, audio power amplification, industrial solenoid drivers, LED power drivers, and high-current voltage-control loops. In each case, the 8 A continuous and 10 A peak ratings provide useful output headroom, provided that the PCB copper, thermal path, load wiring, and protection network are designed for the intended operating conditions.
The primary design consideration is thermal management. Estimated dissipation equals the amplifier output voltage multiplied by the output current, while internal losses also depend on the supply voltage and quiescent current. The exposed power-package tab or thermal lead must connect to an adequate copper area, and output-current limits should be set no higher than necessary for the load. Reactive loads also require back-EMF protection because the amplifier cannot safely absorb unlimited reverse energy.
This page consolidates the verified OPA549S supply, current, protection, package, pricing, and cross-reference information while clearly separating unavailable electrical details. It also provides practical thermal, layout, and selection guidance that is not presented as a single value in distributor listings.
بدائل مباشرة لـ OPA549S — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
OPA549SG3
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
OPA549S الحدود القصوى والخصائص الكهربائية
| Product Type | High-voltage, high-current operational amplifier |
| Number of Channels | 1 circuit |
| Continuous Output Current | 8 A |
| Peak Output Current | 10 A |
| Maximum Single-Supply Voltage | +60 V |
| Maximum Dual-Supply Voltage | ±30 V |
| Output Swing | Wide output-voltage swing; exact limits unavailable |
| Thermal Protection | Thermal shutdown |
| Current-Limit Control | Adjustable current limit |
| Output Control | Output-disable control |
| العلبة | 11-pin power package |
| نوع التركيب | Power package; exact mounting form unavailable |
دليل تكوين أطراف OPA549S 11-pin power package
تكوين الأطراف لـ OPA549S (حزمة 11-pin power package). يتميز هذا المكوّن التناظري بأطراف الإدخال والإخراج وإمداد الطاقة. راجع ورقة بيانات الشركة المصنعة لتكوينات طرف إلغاء الإزاحة والتعويض والتمكين. مثالي لدوائر تكييف الإشارة والمضخمات.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ OPA549S.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
OPA549S مناسب لـ 6 التطبيقs: Industrial Motor Drive, Solenoid and Relay Driver, Laboratory Power Amplifier, Audio Power Amplifier, High-Current LED Driver, Precision Voltage-Control Loop.
Industrial Motor Drive
The OPA549S is well suited to voltage-control motor drivers because it can source or sink 8 A continuously and 10 A at peak while operating from a supply as high as +60 V or from ±30 V dual supplies. It can amplify a position, speed, or torque-command signal and apply the resulting voltage to a motor stage or external transistor network. The wide output swing and adjustable current limit provide useful operating headroom, although the designer must add reverse-energy protection for inductive motor windings and calculate the estimated power loss from output voltage, load current, and supply voltage.
Solenoid and Relay Driver
OPA549S can provide the current required by industrial solenoid, relay, and actuator drivers because its verified ratings include 8 A continuous output current and 10 A peak current. The high-voltage operating range permits operation from elevated industrial supplies, while output-disable control can provide a controlled inactive state. The amplifier still requires a flyback path or other clamp across an inductive load, and its thermal design must accommodate the estimated conduction and saturation losses. Adjustable current limiting should be configured to protect the load without preventing normal startup current.
Laboratory Power Amplifier
The OPA549S can form the output stage of a laboratory voltage amplifier driving resistive, capacitive, or controlled test loads. Its 8 A continuous and 10 A peak current capability is useful when the commanded output must drive low-impedance fixtures, while the wide output-voltage swing allows useful range before approaching the supply rails. Thermal design remains essential because output-stage loss grows with both output current and voltage differential. Current limiting should be set for the intended fixture and load wiring should minimize parasitic inductance.
Audio Power Amplifier
OPA549S is applicable to high-current audio output stages because it combines a high-voltage supply range with 8 A continuous and 10 A peak output-current capability. A voltage-feedback topology can amplify a preamplifier signal directly into a load when the output swing and stability requirements are satisfied. According to the Texas Instruments OPA549 manufacturer information, the device includes thermal shutdown, adjustable current limiting, and output-disable control. Designers should account for reactive speaker impedance, peak current demand, and the estimated heat generated at low frequencies and high load current.
High-Current LED Driver
OPA549S can drive high-power LED arrays when the application requires a controlled voltage output and substantial current. Its 8 A continuous and 10 A peak ratings provide useful margin over individual LED strings, while the +60 V single-supply or ±30 V dual-supply capability supports elevated bus voltages. Output-disable control can provide a convenient shutdown path, and thermal shutdown adds secondary protection. The actual drive topology, LED current regulation method, switching or linear dissipation, and junction-temperature margin must be established before the amplifier is used in production.
Precision Voltage-Control Loop
OPA549S can serve as the high-current actuator in a voltage-feedback control loop where a low-level command signal must drive a resistive, electronic, or controlled load. Its 8 A continuous and 10 A peak output capability accommodates loads that exceed ordinary op-amp current limits, while the wide output swing increases usable command range. The adjustable current limit should be configured below the damage level of the load and wiring. Because loop stability depends on load capacitance and feedback routing, compensation and output isolation must be verified in the final circuit rather than inferred from the headline ratings.
بيانات مرجعية هندسية لـ OPA549S — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | OPA549SG3 |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | 11-pin power package | PSFM11 11-pin power package - same package identifier |
| Continuous Output Current | 8 A | 8 A |
| Peak Output Current | 10 A | 10 A |
| Current-Limit Control | Adjustable current limit | Adjustable current limit |
| Thermal Protection | Thermal shutdown | Thermal shutdown |
| Output Disable | Yes | Yes |
أبرز الفروقات
- Verified high-current output capability (مقابلOPA549SG3)
- Wide single- and dual-supply operating range (مقابلOPA549SG3)
- Integrated output-stage protections (مقابلOPA549SG3)
ملاحظات التصميم
Estimated: use Pd ≈ VOUT × IOUT as a first-order estimate of output-stage dissipation, then add supply-side and quiescent losses. For example, 5 V output at 4 A produces an estimated 20 W output load power before accounting for amplifier losses. Use the package thermal tab or lead, PCB copper, and load-return geometry as the heat path, and verify the estimated junction temperature against the manufacturer limit.
Route the high-current output and load-return paths with short, wide copper traces and minimize loop area. Keep the power-package thermal connection unobstructed, place current-setting and compensation components close to their relevant pins, and provide a low-impedance ground reference. Do not rely on a nominal 8 A device rating without checking connector, trace, copper, and solder-joint temperature rise.
Do not substitute a different package merely because it is part of the same amplifier family. The verified cross-reference identifies OPA549S with PSFM11 and OPA549T with PZFM11, indicating that their package identifiers differ. Before replacement, compare the exact pin assignment, tab or lead geometry, footprint dimensions, thermal limits, and current-limit implementation; package similarity alone does not guarantee PCB compatibility.
Keep feedback routing short and isolated from output-current paths to reduce coupling and stability risk. Place output-disable and current-limit networks away from sensitive input nodes, use a low-value protection path for the load, and provide local supply decoupling according to the manufacturer guidance. Confirm loop stability with the actual resistive and capacitive load because cable and fixture capacitance can materially alter behavior.
معلومات الامتثال
The supplied search results do not provide explicit OPA549S compliance statements. AEC-Q100 status is unknown because the verified ordering codes and qualification details were not included.
