FSB50450AS Datasheet, PDF (6/10 Pages) Fairchild Semiconductor – FSB50450AS Motion SPM® 5 Series

These values depend on PWM control algorithm
+15 V
C₁ * Example Circuit : V phase
10 F
R₅
C₅
VCC VB
HIN HO
LIN
VS
COM LO
VTS
V_DC
P
HIN LIN Output
Note
Inverter
V
Output
0
0
0
1
Z
Both FRFET Off
0
Low side FRFET On
C₃
1
0
VDC
High side FRFET On
1
1 Forbidden
Shoot through
N
R₃
Open Open
Z
Same as (0,0)
C₂
C₄
One Leg Diagram of Motion SPM^® 5 Product
* Example of Bootstrap Param: ters
C₁= C₂ = 1 F Ceramic Capacitor
Figure 3. Recommended MCU Interface and Bootstrap Circuit with Parameters
3rd Notes:
1. Parameters for bootstrap circuit elements are dependent on PWM algorithm. For 15 kHz of switching frequency, typical example of parameters is shown above.
2. RC-coupling (R₅ and C₅) and C₄ at each input of Motion SPM 5 product and MCU (Indicated as Dotted Lines) may be used to prevent improper signal due to surge-noise.
3. Bold lines should be short and thick in PCB pattern to have small stray inductance of circuit, which results in the reduction of surge-voltage. Bypass capacitors such as C₁, C₂
and C₃ should have good high-frequency characteristics to absorb high-frequency ripple-current.
Figure 4. Case Temperature Measurement
3rd Notes:
4. Attach the thermocouple on top of the heat-sink of SPM 5 package (between SPM 5 package and heatsink if applied) to get the correct temperature measurement.
3.5
3.0
2.5
2.0
1.5
1.0
0.5
20
40
60
80
100
120
140
160
THVIC [^oC]
Figure 5. Temperature Profile of V_TS (Typical)
©2012 Fairchild Semiconductor Corporation
6
FSB50450AS Rev. C4
www.fairchildsemi.com