TLP590B - Photovoltaic Optocoupler, 7V/12µA, 2500Vrms, DIP-6
Teilenummer: TLP590B ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.55 | $25,50 |
| 100 | $2.1 | $210,00 |
| 500 | $1.75 | $875,00 |
| 1.000 | $1.45 | $1.450,00 |
TLP590B Übersicht
What is a photovoltaic optocoupler? It is a type of optoisolator whose output stage is a series-connected photodiode array that generates a small DC voltage when the input LED is forward-biased. Unlike transistor-output optocouplers that require an external supply, photovoltaic couplers act as optically-driven DC voltage sources, sitting in the hierarchy: optoisolator > solid-state relay > photocoupler > photovoltaic coupler > signal isolation device.
Key features of the TLP590B include a high open-circuit voltage that eliminates the need for separate driver ICs in low-power MOSFET gate drive circuits, an AlGaAs LED emitter for stable optical output, and a 6-DIP through-hole package (5 active leads, 1 cut) compatible with standard PCB footprints. The device supports MOS gate driver applications, programmable controllers, and telecommunication line interface circuits.
Technically, the TLP590B relies on series-connected photodiodes that multiply the single-junction photovoltaic voltage (≈0.6V) to deliver 7V at the output terminals. The 12 µA short-circuit current capability is sufficient to directly drive small-signal MOSFET gates or to feed a discrete MOSFET gate-charge pump circuit without an auxiliary bias supply, which simplifies isolated DC-DC converter designs.
Typical applications include MOSFET gate drivers in solid-state relays, programmable logic controller (PLC) input isolation, telecommunication line interface cards, and battery management systems (BMS) where the photocoupler provides reinforced isolation between high-voltage battery stacks and low-voltage monitoring MCUs.
When designing with the TLP590B, ensure the LED forward current is set within the recommended operating range (typically IF = 10-20 mA) to achieve the rated VOC and ISC. For higher gate-drive currents, a buffer MOSFET is required since the 12 µA output is intended only for high-impedance gates.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on individual distributor listings, including verified same-brand Toshiba photovoltaic optocouplers in the same DIP-6 footprint for direct PCB-level substitution.
Drop-in-Alternativen für TLP590B – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit TLP590B (gleiche Bauform und Footprint) – abweichend in Output Type, Package.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
TLP597G
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TLP598GAF
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TLP591B
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TLP590B Technische Daten
| Ausgangstyp | Photovoltaic (Photo-Diode Array) |
| Open-Circuit Voltage (VOC) | 7 V (minimum, per Toshiba datasheet) |
| Short-Circuit Current (ISC) | 12 µA (minimum, per Toshiba datasheet) |
| Isolation Voltage | 2500 Vrms |
| Number of Channels | 1 |
| Input Diode Type | AlGaAs Infrared Emitting Diode |
| Gehäuse | 6-DIP, 5 Lead (DIP6 cut) |
| Montageart | Through-Hole |
| Betriebstemperatur | -40 C to +85 C |
| RoHS-Status | Compliant |
| Lead-Free | Yes |
TLP590B Pin-Konfiguration
| Pin 1 | NC — Not connected (mechanical key) |
| Pin 2 | Anode — LED anode (input) |
| Pin 3 | Cathode — LED cathode (input) |
| Pin 4 | VOUT- — Photodiode array negative output terminal |
| Pin 5 | VOUT+ — Photodiode array positive output terminal |
| Pin 6 | NC — Not connected (lead cut, no electrical function) |
Typische Anwendungen
TLP590B ist geeignet für 6 Anwendungs: MOSFET Gate Driver for Solid-State Relays, Programmable Logic Controller (PLC) Input Isolation, Telecommunication Line Interface Cards, Battery Management System (BMS) Isolation, Isolated DC-DC Converter Feedback, Industrial Sensor Signal Isolation.
MOSFET Gate Driver for Solid-State Relays
The Toshiba TLP590B is widely used as the isolated driver stage for low-power MOSFET gates in solid-state relay (SSR) designs. The 7 V open-circuit output voltage is sufficient to drive the gate of a small-signal MOSFET directly, while the 12 µA short-circuit current charges the gate capacitance at a controlled rate. Placed between a microcontroller PWM output and the MOSFET gate, the TLP590B provides 2500 Vrms of galvanic isolation, eliminating ground loops between the low-voltage control domain and the high-voltage load domain. Compared with a mechanical relay, this topology has no moving contacts, no contact bounce, and unlimited electrical endurance, making it well suited for high-cycle industrial switching where the TLP590B's slow but predictable switching characteristic is acceptable.
Empfohlen
Programmable Logic Controller (PLC) Input Isolation
In PLC input modules, the TLP590B provides reinforced isolation between the field-side 24V sensor wiring and the low-voltage logic-side MCU. According to the Toshiba datasheet, the 2500 Vrms isolation rating meets the typical industrial control isolation requirement, while the photovoltaic output stage delivers a clean DC level that the MCU's GPIO can read directly without an external VCC supply. The 6-DIP package is compatible with the standard through-hole PLC module footprint, and the AlGaAs LED input has a wide forward-current operating range that simplifies the input current-limiting resistor design. This combination of features makes the TLP590B a compact, low-cost isolation solution for digital input cards that interface with 24V sensors.
Empfohlen
Telecommunication Line Interface Cards
Telecom line-interface circuits often require reinforced isolation between the line-side high-voltage ringing signals (typically 90-150 Vrms) and the codec-side low-voltage digital logic. According to the Toshiba datasheet, the TLP590B's 2500 Vrms isolation and photovoltaic output topology make it suitable for isolating ringing-detection feedback paths, hook-status signals, and polarity-guidance circuits in SLIC (subscriber line interface card) designs. The 7 V / 12 µA output can directly drive a high-impedance MOSFET gate or feed a comparator input on the codec side without an additional bias rail. Compared with transformer-based isolation, the TLP590B occupies far less PCB area and provides DC-level isolation without a coupling capacitor.
Empfohlen
Battery Management System (BMS) Isolation
In lithium-ion battery management systems, the TLP590B provides isolation between the high-voltage battery stack (often 400V or 800V in EV traction packs) and the low-voltage monitoring MCU that reads cell voltages. According to the Toshiba datasheet, the 2500 Vrms isolation rating combined with the photovoltaic output makes the TLP590B well suited for communicating fault signals (over-voltage, over-temperature) from the high-voltage domain to the low-voltage domain without an isolated supply rail. The 6-DIP package is small enough to fit inside a typical cell-monitoring module. Designers should note that the slow switching speed of photovoltaic optocouplers limits the TLP590B to non-critical fault-flag paths rather than high-speed cell-balancing control loops.
Empfohlen
Isolated DC-DC Converter Feedback
The TLP590B can serve as the isolation element inside the feedback loop of a low-power isolated DC-DC converter, where its 7 V open-circuit output voltage drives the reference pin of a primary-side PWM controller through a resistive divider. According to the Toshiba datasheet, the photovoltaic output acts as a tiny optically-driven DC source, eliminating the need for an auxiliary bias winding on the transformer primary. The 2500 Vrms isolation rating is adequate for industrial 24V bus systems and for medical devices requiring reinforced isolation per IEC 60601-1. The 12 µA output current is sufficient for high-impedance reference inputs but should be buffered for low-impedance feedback paths.
Empfohlen
Industrial Sensor Signal Isolation
The TLP590B is used in industrial 4-20 mA current-loop isolation modules to break ground potential differences between field instrumentation and the controller. According to the Toshiba datasheet, the photovoltaic output stage can power a small isolated signal-conditioning front-end, while the 2500 Vrms isolation prevents ground loops that would otherwise corrupt low-level sensor measurements. The 6-DIP package fits inside standard DIN-rail-mounted isolation modules. For higher-bandwidth analog signals, the TLP590B's relatively slow switching response should be considered; for digital on/off signals and low-frequency fault flags, it is well within specification.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für TLP590B – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | TLP597G | TLP598GAF | TLP591B |
|---|---|---|---|---|
| Package | 6-DIP (5 lead) | 6-DIP (5 lead) - same | 6-DIP (5 lead) - same | 6-DIP (5 lead) - same |
| Brand | Toshiba | Toshiba | Toshiba | Toshiba |
| Output Type | Photovoltaic (Photo-Diode Array) | Photovoltaic | Photovoltaic | Photovoltaic |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Number of Channels | 1 | 1 | 1 | 1 |
| Mounting Type | Through-Hole | Through-Hole | Through-Hole | Through-Hole |
Wichtigste Unterscheidungsmerkmale
- Photovoltaic output eliminates need for isolated bias supply (vs. Transistor-output optocouplers (PC817 family))
- Industry-standard 6-DIP through-hole footprint (vs. TLP5751 (SMD gate driver optocoupler))
- Toshiba brand reliability for industrial and automotive-grade designs (vs. Generic third-party photovoltaic optocouplers)
Designhinweise
The TLP590B's photovoltaic output generates 7 V VOC and 12 µA ISC from the input forward current. Designers should size the input LED current-limiting resistor assuming a typical forward voltage of 1.2-1.5 V across the AlGaAs LED. At IF = 10 mA the device is in its recommended operating region; pushing IF beyond the absolute-maximum rating degrades LED lifetime and is not necessary for typical gate-drive applications.
Estimated: at IF = 10 mA with Vf = 1.4 V, the input LED dissipates roughly 14 mW; the output photodiode array dissipates negligible power (VOC × ISC under load < 100 µW). Total package power dissipation is well below 50 mW, so thermal management is unnecessary. The plastic 6-DIP package is rated for -40 C to +85 C operating temperature with no additional heatsinking required.
For high-isolation designs, maintain a minimum creepage clearance of 8 mm between the input-side traces (pins 2-3) and the output-side traces (pins 4-5) on the PCB. According to the Toshiba datasheet, the 2500 Vrms isolation is established by the package internal clearance; PCB-level spacing is the designer's responsibility and is critical for IEC 60950 / IEC 62368-1 reinforced isolation compliance.
Do NOT use the TLP590B as a drop-in replacement for a transistor-output optocoupler such as the PC817. According to the Toshiba datasheet, the photovoltaic output stage requires no external VCC but delivers only 12 µA; a transistor-output optocoupler requires VCC and delivers milliamps. Substituting one for the other without circuit changes will not work. Also note the slow switching speed - the TLP590B is unsuitable for high-frequency PWM (>10 kHz) feedback paths.
Compliance-Informationen
RoHS and REACH compliance per Toshiba product page. Not AEC-Q100 qualified - this is an industrial-grade optocoupler, not automotive-grade.
