APW7120
Operating Waveforms (Cont.)
(Refer to the typical application circuit, V
BIAS
=V
IN
=+12V supplied by an ATX Power Supply)
6. OCSET Voltage RC Delay
No Connecting a shutdown MOSFET
at OCSET Pin
Connecting a shutdown MOSFET
(2N7002) at OCSET Pin
V
OCSET
V
OCSET
I
L
I
L
1,2
C
Prober
=8pF
OCP
1,2
C
Prober
=8pF
C
2N7002
=44pF (measured)
OCP
Ch1 : V
OCSET
, 0.5V/Div, DC
Time : 2
µ
S/Div
Ch2 : I
L
, 10A/Div, DC
BW = 20 MHz
Ch1 : V
OCSET
, 0.5V/Div, DC
Time : 2
µ
S/Div
Ch2 : I
L
, 10A/Div, DC
BW = 20 MHz
6. OCSET Voltage RC Delay (Cont.)
Connecting a shutdown MOSFET
(APM2322) at OCSET Pin
7. Short-Circuit Test
Shorted by a wire
I
L
1
UVP
OCP
OCP
OCP
OCP
V
OUT
V
OCSET
1,2
C
Prober
=8pF
C
APM2322
=89pF (measured)
OCP
I
L
2
Ch1 : V
OCSET
, 0.5V/Div, DC Ch2 : I
L
, 10A/Div, DC
Time : 2
µ
S/Div
BW = 20 MHz
Ch1 : V
OUT
, 1V/Div, DC
Time : 5mS/Div
Ch2 : I
L
, 10A/Div, DC
BW = 20 MHz
Copyright
©
ANPEC Electronics Corp.
Rev. A.4 - Jan., 2006
11
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
