©2006 Fairchild Semiconductor Corporation
11
www.fairchildsemi.com
FSAM50SM60A Rev. C4
FSAM50SM60A Moti
on
SPM®
2 Series
P1 : Normal operation: IGBT ON and conducting current.
P2 : Short-circuit current detection.
P3 : IGBT gate interrupt / fault signal generation.
P4 : IGBT is slowly turned off.
P5 : IGBT OFF signal.
P6 : IGBT ON signal: but IGBT cannot be turned on during the fault-output activation.
P7 : IGBT OFF state.
P8 : Fault-output reset and normal operation start.
Figure 11. Short-Circuit Protection (Low-Side Operation Only)
Figure 12. Recommended MCU I/O Interface Circuit
3rd Notes:
1. It would be recommended that by-pass capacitors for the gating input signals, IN
(UL)
, IN
(VL)
, IN
(WL)
, IN
(UH)
, IN
(VH)
and IN
(WH)
should be placed on the Motion
SPM
®
2 product pins and on the both sides of MCU and Motion SPM 2 Product for the fault output signal, V
FO
, as close as possible.
2. The logic input works with standard CMOS or LSTTL outputs.
3. R
PL
C
PL
/R
PH
C
PH
/R
PF
C
PF
coupling at each Motion SPM 2 product input is recommended in order to prevent input/output signals’ oscillation and it should be as
close as possible to each of Motion SPM 2 Product pins.
Internal IGBT
Gate-Emitter Voltage
Input Signal
Output Current
Sensing Voltage
Fault Output Signal
P1
P2
P3
P4
P6
P5
P7
P8
SC Reference
Voltage (0.5V)
RC Filter Delay
SC Detection
MCU
COM
5 V
1.2 nF
0.47 nF
1 nF
4.7 k
,
,
IN
(UL)
IN
(VL)
IN
(WL)
,
,
IN
(UH)
IN
(VH)
IN
(WH)
V
FO
100
1 nF
SPM
2 k
R
PF
=
R
PL
=
R
PH
=
C
PF
=
C
PL
=
C
PH
=
100
100
4.7 k
