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FSFR1700XSL
onsemi
IC OFFLINE SW HALF-BRIDGE 9SIP
16534 Pcs New Original In Stock
Converter Offline Half-Bridge Topology Up to 300kHz 9-SIP (L forming)
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*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (275 Ratings)
FSFR1700XSL
Product Overview
7764434
DiGi Electronics Part Number
FSFR1700XSL-DGManufacturer
onsemi
FSFR1700XSL
Description
IC OFFLINE SW HALF-BRIDGE 9SIPInventory
16534 Pcs New Original In Stock
Converter Offline Half-Bridge Topology Up to 300kHz 9-SIP (L forming)
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
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FSFR1700XSL Technical Specifications
Category
Power Management (PMIC), AC DC Converters, Offline Switches
Packaging
Tube
Series
FSFR-XS
Product Status
Obsolete
Output Isolation
Isolated
Internal Switch(s)
Yes
Voltage - Breakdown
500V
Topology
Half-Bridge
Voltage - Start Up
12.5 V
Voltage - Supply (Vcc/Vdd)
10V ~ 25V
Duty Cycle
50%
Frequency - Switching
Up to 300kHz
Power (Watts)
200 W
Fault Protection
Current Limiting, Over Temperature, Over Voltage
Control Features
Frequency Control
Operating Temperature
-40°C ~ 130°C (TJ)
Package / Case
10-SIP Module, 9 Leads, Formed Leads
Supplier Device Package
9-SIP (L forming)
Mounting Type
Through Hole
Base Product Number
FSFR1700
Datasheet & Documents
HTML Datasheet
FSFR1700XSL-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
Not Applicable
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
2156-FSFR1700XSL-488
488-FSFR1700XSL
Standard Package
19
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
包裝非常堅固，確保商品在運送過程中不受損，讓我感到安心。
de desembre 02, 2025
Je suis ravi de la durabilité des produits achetés, ils tiennent leurs promesses.
de desembre 02, 2025
Ich schätze die schnelle Bearbeitung und den raschen Versand, das macht das Einkaufen besonders angenehm.
de desembre 02, 2025
配送のスピードが速く、常に時間通りに届くので助かっています。
de desembre 02, 2025
Their commitment to excellent service truly impressed me as a first-time buyer.
de desembre 02, 2025
The durability and affordability of DiGi Electronics products make them stand out in the market.
de desembre 02, 2025
High-quality materials used in every product; truly top-tier craftsmanship.
de desembre 02, 2025
DiGi Electronics has become my preferred choice because of their trustworthy reputation.
de desembre 02, 2025
We appreciate their proactive support and always dependable stock levels.
de desembre 02, 2025
Their customer service team is highly professional and very helpful.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the FSFR1700XSL in a new power supply design given its obsolete status?
Using the FSFR1700XSL in new designs carries significant long-term supply chain risk due to its obsolete status. While 16,488 units are currently in stock, future availability is not guaranteed, which could lead to production disruptions. For new designs, consider drop-in replacements like the FSFR1800XSL or FSFR2100XS, which offer similar half-bridge topology and protection features but with extended availability. If proceeding with the FSFR1700XSL, secure lifetime buys and evaluate second-source options early in the design cycle to mitigate obsolescence-related BOM risk.
How does the FSFR1700XSL compare to the NCP13992ACDR2G in terms of integration level and protection schemes for offline SMPS designs?
The FSFR1700XSL integrates a 500V half-bridge MOSFET pair with controller, while the NCP13992ACDR2G is a standalone controller requiring external FETs. This makes the FSFR1700XSL ideal for compact, cost-sensitive 200W isolated designs with reduced component count. However, the NCP13992ACDR2G offers higher flexibility in FET selection and better thermal scalability. The FSFR1700XSL includes built-in over-voltage, over-temperature, and current limiting protections—crucial for robustness in unattended power systems—whereas the NCP13992ACDR2G relies on external circuitry for full fault coverage, increasing design complexity.
Can the FSFR1700XSL reliably operate at its maximum 300kHz switching frequency in high-temperature environments near 130°C?
Operating the FSFR1700XSL at 300kHz near its maximum junction temperature of 130°C increases thermal stress and switching losses, risking thermal runaway if the PCB layout doesn’t provide adequate heat dissipation. To mitigate this, use wide copper pours for drain and source connections, minimize gate loop inductance, and consider derating the switching frequency to 200–250kHz in high-ambient environments. Monitor TJ via thermal imaging during validation, especially under full 200W load and low line input conditions where conduction losses peak.
What are the critical PCB layout considerations when replacing the FSFR1700XS with the FSFR1700XSL in an existing design?
The FSFR1700XSL has an 'L-forming' 9-SIP lead configuration, which differs mechanically from straight-lead packages like the FSFR1700XS. Verify lead pitch and mounting hole alignment to avoid mechanical stress. Ensure high dv/dt nodes (switch node, gate drivers) are kept short and away from sensitive control circuitry to prevent coupling. The integrated half-bridge in the FSFR1700XSL reduces parasitic inductance but requires careful thermal via placement under the drain pad (if present) to maintain reliability under continuous 200W operation. Update stencil designs and assembly fixtures to match the formed leads.
What are the implications of using the FSFR1700XSL beyond its stated 50% duty cycle limit in resonant LLC topologies?
The FSFR1700XSL is designed for up to 50% duty cycle in half-bridge configurations, which aligns with typical resonant LLC operation. Exceeding this duty cycle—especially during start-up or transient overload—can cause uneven core reset in the transformer, leading to flux walking and potential saturation. This increases RMS currents and stresses the internal MOSFETs beyond safe operating limits. To avoid this, ensure control loop response is tuned to clamp duty cycle strictly below 50%, and use leading-edge blanking on current sense inputs to prevent false triggering during switching transitions. Monitor VDS waveforms under dynamic load steps to validate safe operation.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
FSFR1700XSL CAD Models
onsemi FSFR1700XSL PCB symbols & footprints
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