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TFX12V Power Supply Design Guide
Thin Form Factor with 12-V Connector
Version 2.0
115VAC input and 230VAC input, under the load conditions defined Table 8, and under the temperature and
operating conditions defined in Section 3. The loading condition for testing efficiency shown in Table 7
represents a fully loaded system, a typical (50%) loaded system, and a light (20%) loaded system.
Table 7: Efficiency Vs Load
Loading Full load Typical load Light load
Required Minimum Efficiency
70% 70% 60%
Recommended Minimum Efficiency
75% 80% 68%
Table 8. Loading Table for Efficiency Measurements
180W (loading shown in Amps)
Loading +12V +5V +3.3V -12V +5Vsb
Full 11 4 5.8 0.3 1.0
Typical 7 3 4 0.1 1.0
Light 2 0.3 0.5 0.0 1.0
220W (loading shown in Amps)
Loading +12V +5V +3.3V -12V +5Vsb
Full 13 5 9 0.3 1.0
Typical 8 3 5 0.1 1.0
Light 3 0.5 2.0 0.0 1.0
240W (loading shown in Amps)
Loading +12V +5V +3.3V -12V +5Vsb
Full 14.5 7 7 0.2 1.0
Typical 7 4 5 0.1 1.0
Light 3.4 1.0 3.0 0.0 1.0
270W (loading shown in Amps)
Loading +12V1 +12V2 +5V +3.3V -12V +5Vsb
Full 4 11.5 9.4 9 0.2 1.0
Typical 2 5.5 4.5 4 0.1 1.0
Light 1 2.4 0.4 0.7 0.0 1.0