FAN7387 Datasheet, PDF (9/17 Pages) Fairchild Semiconductor – Self-Oscillated, High-Voltage Gate Driver

Switching Definitions
CT
RCT ₁
10µF 100nF ^RDT
VDD ₂
DT/SD
3
470nF RT
GND ₄
VB
8
7
6 ^VS
5
1000pF
0.1µF
10µF
+14V
HO
LO
1000pF
FAN7387 Ver1.0
Figure 7. Test Circuit for Self-oscillation Method
RCT
LO
DT
HO
Figure 8. Basic Operating Waveforms of
Self-oscillation
DT/SD
HO or LO
50%
TSD
90%
Figure 9. Shutdown Delay Definition
PWM+DC offset
RCT ₁
+14V
10µF 0.1µF
VDD ₂
RDT
DT/SD
3
470nF
GND ₄
VB
8
7
6 ^VS
5
0.1µF
10µF
+14V
HO
LO
1000pF 1000pF
Figure 10. Test Circuit for Forced-oscillation Method
Using External Signal
RCT
50%
tON
tR
HO
90%
50%
10%
LO
50%
tOFF TF
90%
50%
10%
DT
50%
90%
TSD
DT/ SD
50%
Figure 11. Basic Operation Waveforms of Forced-oscillation Method Using External Signal
© 2008 Fairchild Semiconductor Corporation
FAN7387 Rev. 1.0.0
9
www.fairchildsemi.com