FNB41560B2 Datasheet, PDF (12/16 Pages) Fairchild Semiconductor – FNB41560/FNB41560B2 Motion SPM 45 Series

Lower Arms
Control Input
Protection
Circuit State
c6 c7
SET
RESET
Internal IGBT
Gate - Emitter Voltage
c4
c3
c2
SC
c1
Output Current
c8
Sensing Voltage
of Shunt Resistance
Fault Output Signal
SC Reference Voltage
CR Circuit Time
c5 ^{Constant Delay}
(with the external shunt resistance and CR connection)
c1 : Normal operation: IGBT ON and carrying current.
c2 : Short-circuit current detection (SC trigger).
c3 : Hard IGBT gate interrupt.
c4 : IGBT turns OFF.
c5 : Input “LOW”: IGBT OFF state.
c6 : Input “HIGH”: IGBT ON state, but during the active period of fault output, the IGBT doesn’t turn ON.
c7 : IGBT OFF state.
Figure 13. Short-Circuit Protection (Low-Side Operation Only)
Input/Output Interface Circuit
MCU
+5 V (for MCU or Control power)
R_PF = 10 kΩ
SPM
IN_(UH) , IN_(VH) , IN_(WH)
IN _(UL) , IN _(VL) , IN_(WL)
V_FO
COM
2nd Notes:
Figure 14. Recommended MCU I/O Interface Circuit
12. RC coupling at each input (parts shown dotted) might change depending on the PWM control scheme in the application and the wiring impedance of the application’s printed
circuit board. The input signal section of the Motion SPM^® 45 product integrates a 5 k(typ.) pull-down resistor. Therefore, when using an external filtering resistor, pay atten-
tion to the signal voltage drop at input terminal.
©2011 Fairchild Semiconductor Corporation
12
FNB41560 / FNB41560B2 Rev. C3
www.fairchildsemi.com