L2720D13TR - 1A Dual Power Op Amp | STMicroelectronics
MPN： L2720D13TR ✓ 啟用中L2720D13TR 概覽
A power operational amplifier is a specialized operational amplifier designed to drive loads such as power transistors, loudspeakers, solenoids, or motor-control stages while delivering substantially more current than a conventional small-signal op amp. Within the broader hierarchy, the L2720 is a dual operational amplifier, a voltage-feedback amplifier, an analog integrated circuit, and a power-management interface component.
Key characteristics include two amplifier channels, 1 A output capability, operation with either one supply or split bipolar supplies, and a wide signal range. The manufacturer datasheet identifies low input offset voltage, ground-compatible inputs, clamp diodes, and thermal shutdown as important functional features. Its maximum input offset voltage is listed as 10 mV, input bias current as 1 µA, and common-mode rejection as 84 dB.
The L2720D13TR is intended for industrial-grade applications covering an operating temperature range of -40 °C to +85 °C. Its two-channel architecture allows one package to support complementary or paired amplifier functions, while 1 A output capability reduces the need for an external driver when the load and thermal conditions permit direct operation. Ground-compatible inputs are useful in single-supply systems where the signal can approach the lower supply rail.
Typical uses include servo-amplifier output stages, power-supply control circuits, compact-disc and VCR motor drives, audio output stages, and industrial actuator drivers. The 16-SOIC package also supports conventional surface-mount assembly, although careful attention to copper area and thermal paths remains necessary when continuous high-current operation dissipates substantial power.
For robust layouts, keep the power-loop current path short, provide adequate input and output decoupling, and verify the transistor or load return path independently of sensitive feedback routing. The maximum output current is a capability limit rather than a recommended continuous operating point; calculate junction heating for the actual supply voltage, load current, and ambient environment.
This product page combines the manufacturer-level functional description, package and environmental characteristics, application guidance, comparison points, and practical design considerations into a concise engineering reference for amplifier and actuator-drive design.
直接替換替代品，適用於 L2720D13TR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品L2720D13TR 最大額定值與電氣特性
| Amplifier Type | Dual low-side power operational amplifier |
| Number of Amplifier Channels | 2 circuits |
| 最大輸出電流 | 1 A |
| Supply Configuration | Single or split supply |
| Input Offset Voltage | 10 mV maximum |
| Input Bias Current | 1 µA |
| Common-Mode Rejection Ratio | 84 dB |
| 工作溫度範圍 | -40 °C to +85 °C |
| Temperature Grade | Industrial |
| 封裝 | 16-SOIC, 0.154 inch body width, 3.90 mm width |
| Terminal Count | 16 terminals |
| Terminal Form | Gull wing |
| 安裝類型 | Surface mount |
| Input Ground Compatibility | Ground-compatible inputs |
| Internal Protection | Thermal shutdown and clamp diodes |
L2720D13TR 16-soic, 0.154 inch body width, 3.90 mm width 腳位配置指南
L2720D13TR（16-soic, 0.154 inch body width, 3.90 mm width 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： L2720D13TR.
請參閱 資料表 以查看完整腳位配置。
典型應用
L2720D13TR 適用於 6 應用s: Servo Amplifier Output Stage, Industrial Power Supply Control, DC Motor and Actuator Driver, Audio Output Amplification, Compact Disc and Legacy Motor Drive, Power MOSFET Gate Drive.
Servo Amplifier Output Stage
The L2720D13TR suits servo-amplifier stages because its dual channels provide 1 A output-current capability while retaining low input offset voltage of 10 mV and an 84 dB common-mode rejection ratio. The amplifier can operate from single or split supplies, allowing it to work with unipolar or bipolar actuator systems. In a typical servo loop, one channel may drive a power-transistor stage while the other handles feedback or an auxiliary control function. Use the manufacturer's recommended compensation and external transistor arrangements, and verify that the load cannot pull the output beyond the device's saturation and supply limits.
Industrial Power Supply Control
The L2720D13TR can be used as the high-current error amplifier in industrial power-supply control loops, where its 1 A output capability can directly drive a power stage more effectively than a conventional small-signal op amp. Low saturation voltage supports correction of drive-stage errors, while the large common-mode input range accommodates feedback signals at elevated reference levels. The dual package provides flexibility for error amplification and current-command or auxiliary functions. Thermal verification remains essential because dissipation depends on supply span, transistor topology, load, and switching frequency.
DC Motor and Actuator Driver
The L2720D13TR is applicable to low-frequency DC motor and actuator drives because its two amplifier channels can provide control and drive functions in one package. Output current to 1 A gives the designer more drive authority than a standard precision op amp, while single- or split-supply operation supports different motor-bus arrangements. The ground-compatible input characteristic is useful when command signals originate near the lower rail. Add suitable transistor drive stages, flyback protection, current limiting, and thermal control, since the amplifier's output rating alone does not guarantee safe motor-starting or stalled-rotor operation.
Audio Output Amplification
The L2720D13TR can serve in audio output circuitry requiring substantially more current than a conventional small-signal operational amplifier. Its 1 A output capability, low input offset voltage, and dual-channel configuration are useful in pre-driver, line-driver, or discrete-transistor output stages. The ability to work from single or split supplies supports portable and legacy audio systems, while low saturation voltage helps the amplifier remain within its linear operating region. Designers should still evaluate THD, noise, slew behavior, load impedance, and thermal rise using the application circuit rather than assuming general-purpose performance matches a dedicated audio amplifier.
Compact Disc and Legacy Motor Drive
The STMicroelectronics documentation identifies compact-disc and VCR applications as suitable uses for the L2720 family, making the L2720D13TR relevant to legacy spindle or actuator drive designs. Its dual-channel configuration can support a control amplifier and a complementary drive function, while the 1 A output rating can simplify connections to external power devices. Single- and split-supply flexibility helps accommodate different motor-drive topologies. For repair or redesign work, preserve the original compensation, output-stage, and protection arrangement because changing feedback or drive current can affect stability, oscillation, and actuator positioning.
Power MOSFET Gate Drive
The L2720D13TR can provide error amplification or gate-drive current for power MOSFETs in low-frequency power-conversion circuits. Its 1 A output capability offers more drive current than a conventional signal amplifier, and the 84 dB common-mode rejection helps preserve control accuracy in systems with substantial power-stage transients. The broad input range and single- or split-supply operation support various controller arrangements. Gate resistance, external transistor gain, dead time, and compensation determine stability, so use the amplifier primarily as a controlled drive element rather than driving an unbounded capacitive gate directly.
工程參考資料，適用於 L2720D13TR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Product Type | Dual low-side power operational amplifier |
| Brand | STMicroelectronics |
| Package | 16-SOIC |
| Number of Channels | 2 circuits |
| Maximum Output Current | 1 A |
| Supply Operation | Single or split supply |
| Maximum Input Offset Voltage | 10 mV |
| Input Bias Current | 1 µA |
| Common-Mode Rejection Ratio | 84 dB |
| Operating Temperature Range | -40 °C to +85 °C |
主要差異化特點
- Substantially higher output drive than a conventional precision operational amplifier (對比Generic precision dual operational amplifier)
- Flexible single- or split-supply operation (對比Single-supply-only general-purpose amplifier)
- Two channels in one 16-SOIC package (對比Discrete single-channel power amplifier)
設計說明
Estimated: amplifier power dissipation can be calculated as P = (VIN - VOUT) × IOUT plus the contribution from quiescent and output-stage currents. For example, at 24 V input, 12 V output, and 1 A output, the voltage-drop contribution is 12 W before accounting for other losses. Use the resulting value with the package thermal resistance and actual board copper to determine junction temperature. The 1 A output rating is a capability limit, not a recommendation for continuous operation at maximum voltage drop.
Place the power-device connections, load return, and high-current output path directly beneath the package where the footprint allows, and keep these paths away from feedback and input traces. Use a continuous ground plane unless the circuit topology requires isolation, but split high-current return currents carefully to avoid sharing a noisy path with the amplifier reference node. Confirm the 16-SOIC land pattern against the manufacturer package drawing and verify whether the selected thermal strategy relies solely on PCB copper.
Do not interpret the 1 A output capability as unlimited load capability at every supply voltage. Check output saturation, thermal shutdown behavior, external transistor requirements, and the voltage and current limits of the load. The L2720D13TR is a dual amplifier in a 16-SOIC, so each channel has its own feedback network and output; verify both channels separately under worst-case common-mode, offset, and output conditions rather than assuming identical dynamic behavior.
Route the feedback connection directly from the output node and keep it away from supply-current paths and power-device collectors or drains. Input leads should be short and guarded against capacitive pickup because the power stage can couple transients back through parasitic capacitance. When filtering control signals, place the associated components near the relevant input or feedback node. Confirm compensation values and stability against the final load, external transistor capacitance, and power-supply impedance.
合規資訊
The component is an industrial-temperature operational amplifier, but no explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals status was identified for the exact ordering code.
