MG39133AH Datasheet, PDF (9/11 Pages) Megawin Technology Co., Ltd – Over voltage protection

10 Application information
Current Setting
If the application circuit is same as below
The current setting will be
I_TAP6 = (1.2V ÷ (R_SET6))
I_TAP5 = (1.1V ÷ (R_SET6 + R_SET5))
I_TAP4 = (1.1V ÷ (R_SET6 + R_SET5 + R_SET4))
I_TAP3 = (1.1V ÷ (R_SET6 + R_SET5 + R_SET4 + R_SET3))
I_TAP2 = (1.1V ÷ (R_SET6 + R_SET5 + R_SET4 + R_SET3 + R_SET2))
I_TAP1 = (1.1V ÷ (R_SET6 + R_SET5 + R_SET4 + R_SET3 + R_SET2+ R_SET1))
R_SET6 = (1.2V ÷ I_TAP6)
R_SET5 = (1.1V ÷ I_TAP5) – R_SET6
R_SET4 = (1.1V ÷ I_TAP4) – R_SET6 – R_SET5
R_SET3 = (1.1V ÷ I_TAP3) – R_SET6 – R_SET5 – R_SET4
R_SET2 = (1.1V ÷ I_TAP2) – R_SET6 – R_SET5 – R_SET4 – R_SET3
R_SET1 = (1.1V ÷ I_TAP1) – R_SET6 – R_SET5 – R_SET4 – R_SET3 – R_SET2
The MG39133 can sustain an input voltage level as high as 500V. But users should care the heat dissipation
issue for their applications. For large wattage application, the 131 will consumes 2W~3W power. The IC’s heat-
sink should be firmly attached to the substrate. Aluminum or Ceramic PCB is recommended.
Package Thermal Resistance
The thermal resistance is around 66°C /W, junction to ambient (no air flow)
Note: Rule of thumb, it is suggested that the IC surface temperature is maintained below 9°C0 (Celsius degree). For ETSSOP16
package, maintain the power dissipation below 1.5W.
MEGAWIN
MG39133 Data Sheet
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