| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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107 pcs
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107 pcs | On Request | 1 | On Request | On Request | On Request | On Request | 2026-02-23 21:33:16 |
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The Premier Magnetics TSD-1943 is a control transformer specifically designed for integration with Power Integrations TOP247Y off-line PWM switching regulators. This transformer is optimized for flyback buck-boost circuit configurations, enabling isolated multiple outputs with high efficiency.
Key electrical specifications include a primary inductance of 320 μH at 0.250Vrms and 100 kHz, with a range of 300-350 μH. The transformer offers several turn ratios: 1:8.25 for the main secondary windings (pins 7-9 and 10-12) relative to the primary (pins 4-1), and 1:6.6 for the bias winding (pins 5-6) relative to the primary. Primary leakage inductance is a maximum of 16 μH.
Hipot testing indicates a minimum of 3000 Vrms for both primary-to-secondary and bias-to-secondary configurations. The transformer is designed to operate within an AC line voltage range of 85-265 Vac, providing a stable 25.0 Vdc output voltage. It supports a continuous output current of up to 2.5 A and a peak output current of 3.0 A, with line and load regulation both at a maximum of 0.20%.
Physical dimensions are provided in millimeters, with the maximum length being 31.50 mm, maximum width 26.50 mm, and maximum height 29.00 mm. The transformer assembly is varnish finished and designed to meet >6.2mm creepage requirements, with triple basic insulated secondary windings. All materials meet UL, CSA, and IEC requirements.
| Qty | Low | High |
|---|---|---|
| 1+ | $1.32 | $1.32 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The primary inductance of the TSD-1943 transformer is typically 320 μH, with a specified range of 300 μH to 350 μH.
The TSD-1943 transformer has a turn ratio of 1:8.25 for the secondary windings (pins 7-9 and 10-12) relative to the primary (pins 4-1), and a turn ratio of 1:6.6 for the bias winding (pins 5-6) relative to the primary.
The TSD-1943 transformer provides a 25.0 Vdc output voltage and supports a continuous output current of 0.0 to 2.5 Amps, with a peak output current of 3.0 Amps.
The TSD-1943 transformer is designed to operate within an AC line voltage range of 85 to 265 Vac at 60 Hz.
The TSD-1943 transformer has a maximum length of 31.50 mm, a maximum width of 26.50 mm, and a maximum height of 29.00 mm.
The RoHS status is RoHS3 Compliant.
The Moisture Sensitivity Level (MSL) is 1 Unlimited.