CS3524A
Typical Performance Characteristics continued
Quiescent Supply Current vs. Supply Voltage Over
Temperature
10
Shutdown Delay From PWM Comparator
OUTPUT (V)
QUIESCENT CURRENT (mA)
9
8
7
6
5
T
A
= -55°C
T
A
= 25°C
T
A
= 125°C
20
15
10
5
0
5
4
3
2
1
0
0
V
IN
= 20V
R
L
= 2kΩ
T
A
= 25˚C
OUTPUT at
V
OA
or V
OB
3
2
Note: Outputs off. R
T
=
∞
1
0
0
10
20
30
40
50
INTPUT (V)
4
INPUT at V
OB
Note: Minimum input pulse width
to latch is 200ns
1
2
3
SUPPLY VOLTAGE V
IN
(V)
DELAY TIME (µs)
Oscillator Frequency vs. Timing Components Resistor
Over Timing Capacitance
1M
Output Dead Time vs. Timing Capacitor Value
10
OSCILLATOR FREQUENCY (Hz)
OUTPUT DEAD TIME (µs)
V
IN
= 20V
T
A
= 25˚C
100k
5.0
V
IN
= 20V
R
T
= 2700Ω
T
A
= 25˚C
2.0
1.0
0.5
C
T
C
T
=1
.0n
=3
.0n
=1
0nf
=3
0nf
f
f
10k
C
T
C
T
1k
f≈ 1.15
R
T
C
T
100
1
2
5
10
C
T
=1
00n
f
0.2
0.1
Note: Dead time = osc output pulse
width plus output delay
1
2
5
10
20
50
100
20
50
100
TIMING RESISTOR - R
T
(kΩ)
TIMING CAPACITOR - C
T
(nf)
Current Limit Amplifier Delay
OUTPUT at COMP
Turn-Off Delay From Shutdown
OUTPUT (V)
20
15
10
5
0
OUTPUT at
V
O
A
OR V
O
B
V
IN
= 20V
R
L
= 2kΩ
T
A
= 25˚C
6
5
4
3
2
1
0
OUTPUT (V)
Overdrive
5%
10%
20%
50%
INTPUT (V)
INPUT at I
SENSE+
0.2
0.1
0.0
0
1
2
V
IN
20V T
A
25˚C
EA+ = V
REF
I
SENSE–
= Gnd
INTPUT (V)
1.0
0.5
0.0
Note: Minimum input pulse width
to latch is 200ns
0
1
2
3
INPUT at
SHUTDOWN
3
4
DELAY TIME (µs)
DELAY TIME (µs)
4
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
