MC44608
ELECTRICAL CHARACTERISTICS
Characteristic
Symbol
Min
Typ
Max
Unit
OUTPUT SECTION
Output Resistor
Sink Resistance
Source Resistance
R
5.0
8.5
15
15
OL
R
OH
(1)
Output Voltage Rise Time (from 3 V up to 9 V)
t
50
50
ns
ns
r
(1)
Output Voltage Falling Edge Slew–Rate (from 9 V down to 3 V)
t
f
CONTROL INPUT SECTION
Duty Cycle @ I
= 2.5 mA
= 1.0 mA
d
d
2.0
48
%
%
V
pin3
pin3
2mA
Duty Cycle @ I
36
4.75
3.4
43
5.0
3.9
3.0
1mA
Control Input Clamp Voltage (Switching Phase) @ I
pin3
= –1.0 mA
5.25
4.3
3.7
Latched Phase Control Input Voltage (Stand–by) @ I
= +500
A
V
V
V
pin3
pin3
LP–stby
Latched Phase Control Input Voltage (Stand–by) @ I
= +1.0 mA
2.4
V
LP–stby
CURRENT SENSE SECTION
Maximum Current Sense Input Threshold
Input Bias Current
V
0.95
–1.8
180
180
1.0
1.05
1.8
V
A
CS–th
I
B–cs
Stand–By Current Sense Input Current
I
200
200
220
480
250
200
680
470
400
220
220
A
CS–stby
CS–stup
Start–up Phase Current Sense Input Current
I
A
Propagation Delay (Current Sense Input to Output @ V
Leading Edge Blanking Duration
T MOS = 3 V)
MC44608P40
MC44608P75
MC44608P100
MC44608P40
MC44608P75
MC44608P100
T
PLH(In/Out)
ns
ns
ns
ns
ns
ns
ns
TH
T
T
T
T
T
T
LEB
LEB
LEB
DLY
DLY
DLY
Leading Edge Blanking Duration
Leading Edge Blanking Duration
Leading Edge Blanking + Propagation Delay
Leading Edge Blanking + Propagation Delay
Leading Edge Blanking + Propagation Delay
OSCILLATOR SECTION
500
370
900
570
Normal Operation Frequency MC44608P40
Normal Operation Frequency MC44608P75
Normal Operation Frequency MC44608P100
f
f
f
36
68
40
75
44
82
kHz
kHz
kHz
%
osc
osc
osc
max
100
82
Maximum Duty Cycle @ f = f
OVERVOLTAGE SECTION
Quick OVP Input Filtering (R
d
78
86
osc
= 100 k
)
T
250
2.0
ns
µs
µA
V
demag
filt
T
PHL(In/Out)
Propagation Delay (I
> I
to output low)
demag ovp
Quick OVP Current Threshold
Protection Threshold Level on V
I
105
14.8
1.0
120
15.3
140
OVP
V
15.8
CC
CC–OVP
Minimum Gap Between V
and V
V –
CC–OVP
V
CC–OVP
stup–th
V
stup
NOTES:
(1) This parameter is measured using 1.0 nF connected between the output and the ground.
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