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TO Series
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SMPS Transformer
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 Product Datasheet/Mechanical Drawings |
Description
Designed in conjunction with ON-Semi, the TO Series of transformers work with the ON Semiconductor NCP1207 PWM current-mode controller with quasiresonant (QR) switching capability.
Standard designs for 5V and 12V single outputs in power levels ranging from 25W to 85W will get your prototypes up and running fast. Just contact ICE Components to request samples or to discuss a custom version to meet your specific requirement. |
PACKAGING
Tray=24 pieces, Box=12 trays, Box=288 pieces | |
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Part
Number
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Core Type
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Input Bulk Cap
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Iout (max)
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Ipk
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LPRI
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Output Power Range
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Vout
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Order
FREE SAMPLES
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| TO-05300 |
EFD30 |
68 μF |
6 A |
1.8 A |
471.4 μH |
25-30 W |
5 Vdc |
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| TO-05400 |
ER28 |
82 μF |
8 A |
2.46 A |
351.8 μH |
31-40 W |
5 Vdc |
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| TO-05500 |
ER28 |
120 μF |
10 A |
3.09 A |
289.7 μH |
41-50 W |
5 Vdc |
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| TO-05650 |
PQ32/20 |
150 μF |
13 A |
3.89 A |
224.9 μH |
51-65 W |
5 Vdc |
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| TO-05800 |
ERL28 |
180 μF |
16 A |
4.81 A |
182.9 μH |
66-80 W |
5 Vdc |
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| TO-12300 |
EF25 |
68 μF |
2.5 A |
1.93 A |
384.4 μH |
25-30 W |
12 Vdc |
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| TO-12400 |
EFD30 |
82 μF |
3.33 A |
2.63 A |
288.4 μH |
31-40 W |
12 Vdc |
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| TO-12600 |
ER28 |
120 μF |
5 A |
3.97 A |
194.4 μH |
41-60 W |
12 Vdc |
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| TO-12850 |
ERL28 |
180 μF |
7.1 A |
5.55 A |
139.5 μH |
61-85 W |
12 Vdc |
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Test Conditions:
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• Measured at 100 kHz, 1 Vrms.
• Electrical specifications at 25ºC.
• Meets UL 94V-0.
• Operating temperature range: -40ºC to +130ºC. Operating tem- perature is the sum of ambient temperature plus temperature rise.
• Transformer inductance values calculated using ON Semi-conductor’s “QR Inductance Calculation” spreadsheet, available at http://www.onsemi.com/pub/collateral/QR IND CALC.xls. Certain design assumptions were necessary to develop core and bobbin choices:
• Input bulk capacitor sized at 2 uF/W, rounded up to the first commercially available value. B. Universal input voltage, with 265 VAC as the upper limit. The lower limit input voltage was adjusted to cause the input bulk capacitor value to be a commercially available value. C. Maximum switching frequency: 100 kHz. D. Maximum duty cycle: <50%. E. Efficiency set at 87%. F. Output diode drop set at 0.4 V. G. Turns ratios are as follows: 1. 5V: 1:0.08 2. 12V: 1:0.20 H. Estimated total drain capacitance set at 100 pF. I. BMAX set at 0.250 T. J. Wire sized for <40ºC temperature rise at low input line voltage and full output load at 25ºC. 6. Constructed using UL Class B insulation system. 7. Hi-Pot Test: 3750 VAC primary to secondary, and 2500 VAC windings to core. |
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