TLP190B(TPL,U,C,F) Equivalent & Substitute Parts

Part Overview

The TLP190B(TPL,U,C,F) is an optoisolator with photovoltaic output manufactured by Toshiba Semiconductor and Storage. This component provides galvanic isolation with a 2500Vrms isolation voltage rating and features a single channel configuration in a 6-MFSOP surface mount package. The device is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements.

Substiute Parts

TLP190B(TPL,U,C,F)

Toshiba Semiconductor and StorageIn Stock: 22348TLP190B(TPL,U,C,F) Datasheet

Current PartRFQ

TLP3905(TPL,E

Toshiba Semiconductor and StorageIn Stock: 1233TLP3905(TPL,E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLP190B(TPL,U,C,F) is determined by the following critical parameters:

Functional Compatibility Criteria:

• Single channel optoisolator configuration
• Photovoltaic output topology
• DC input type
• Surface mount technology

Electrical Performance Criteria:

• Isolation voltage rating (minimum 2500Vrms required)
• Output voltage capability (maximum 8V or greater)
• Output current per channel (minimum 12µA required)
• Forward voltage characteristics (Vf approximately 1.4V)
• Forward current rating (If maximum 50 mA or greater)
• Switching time parameters (turn-on/turn-off response)

Environmental & Compliance Criteria:

• Operating temperature range (-40°C to 85°C minimum)
• Active product status for ongoing availability
• Surface mount packaging compatibility

The TLP3905(TPL,E) qualifies as a direct substitute based on these parameters, offering enhanced isolation voltage, extended temperature range, and active product status.

Parameter Comparison

Engineering Selection Recommendations

TLP3905(TPL,E) as Primary Substitute:

The TLP3905(TPL,E) is the manufacturer-recommended substitute for the obsolete TLP190B(TPL,U,C,F). This substitution is supported by the following factors:

1. Product Status: The TLP3905(TPL,E) maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete TLP190B(TPL,U,C,F).

2. Compliance Certifications: The TLP3905(TPL,E) carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic components. Moisture sensitivity level MSL 1 (Unlimited) provides superior handling flexibility.

3. Enhanced Electrical Performance: The TLP3905(TPL,E) provides 3750Vrms isolation voltage, exceeding the 2500Vrms specification of the original part. Output current capability increases to 30µA typical, improving signal integrity in photovoltaic applications.

4. Extended Operating Temperature Range: The TLP3905(TPL,E) operates across -40°C to 125°C, extending the upper temperature limit by 40°C compared to the TLP190B(TPL,U,C,F) (-40°C to 85°C).

5. Package Compatibility: Both components utilize 6-lead surface mount packages with 4-lead configurations, maintaining PCB layout compatibility with minor footprint adjustments for the SOIC versus MFSOP package geometry.

Design Considerations:

Forward current rating of the TLP3905(TPL,E) is 30 mA maximum, compared to 50 mA for the TLP190B(TPL,U,C,F). Applications requiring forward currents exceeding 30 mA require circuit redesign. Turn-on time increases from 200µs to 300µs; applications with critical timing requirements must account for this 100µs difference.

Frequently Asked Questions (FAQ)

Q: Can the TLP3905(TPL,E) directly replace the TLP190B(TPL,U,C,F) without circuit modifications?

A: The TLP3905(TPL,E) is functionally compatible as a substitute. However, the forward current maximum rating differs (30 mA versus 50 mA), and turn-on time increases from 200µs to 300µs. Circuit designs operating at the upper limits of the original specifications require evaluation and potential adjustment.

Q: What is the primary reason for substituting the TLP190B(TPL,U,C,F)?

A: The TLP190B(TPL,U,C,F) is classified as obsolete. The TLP3905(TPL,E) is the active equivalent, ensuring continued component availability for production and new designs.

Q: Are there package compatibility issues between the TLP190B(TPL,U,C,F) and TLP3905(TPL,E)?

A: Both components use 6-lead surface mount packages with 4-lead configurations. The TLP190B(TPL,U,C,F) uses 6-MFSOP (Gull Wing), while the TLP3905(TPL,E) uses 6-SOIC. PCB footprints differ slightly; layout verification is required before production implementation.

Q: Does the TLP3905(TPL,E) meet current regulatory compliance standards?

A: Yes. The TLP3905(TPL,E) is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The TLP190B(TPL,U,C,F) compliance status is not specified.

Q: How does the isolation voltage difference affect substitution?

A: The TLP3905(TPL,E) provides 3750Vrms isolation versus 2500Vrms for the TLP190B(TPL,U,C,F). This represents a 50% increase in isolation capability, providing enhanced safety margins in high-voltage isolation applications.

Q: What is the impact of the extended operating temperature range of the TLP3905(TPL,E)?

A: The TLP3905(TPL,E) operates to 125°C maximum, compared to 85°C for the TLP190B(TPL,U,C,F). This 40°C extension accommodates higher ambient temperature environments and provides thermal design margin in thermally constrained applications.

Q: Are there output current differences between these components?

A: Yes. The TLP3905(TPL,E) provides 30µA typical output current compared to 12µA for the TLP190B(TPL,U,C,F). This 2.5× increase improves signal-to-noise ratio and reduces susceptibility to noise coupling in photovoltaic output circuits.