SG3525 STMicroelectronics, SG3525 Datasheet - Page 4

• Manufacturer Part Number: SG3525
• Description: Voltage Mode PWM
• Manufacturer: STMicroelectronics

SG2525A-SG3525A
ELECTRICAL CHARACTERISTICS (continued)
* These parameters, although guaranteed over the recommended operating conditions, are not 100 % tested in production.
.
4/12
PWM COMPARATOR
SHUTDOWN SECTION
OUTPUT DRIVERS (each output) (V
TOTAL STANDBY CURRENT
Symbol
Tested at f
f =
DC transconductance (g
from pin 9 to ground. The minimum g
t
t
I
I
*
*
r
f
C
s
*
*
C
T
(0.7 R
osc
Minimum Duty-cycle
Maximum Duty-cycle
Input Threshold
Input Bias Current
Soft Start Current
Soft Start Low Level
Shutdown Threshold
Shutdown Input Current V
Shutdown Delay
Output Low Level
Output High Level
Under-Voltage Lockout
Collector Leakage
Rise Time
Fall Time
Supply Current
= 40 KHz (R
1
T
+ 3 R
Parameter
D
)
M
) relates to DC open-loop voltage gain (G
T
= 3.6 K , C
M
specification is used to calculate minimum G
T
= 10nF, R
Zero Duty-cycle
Maximum Duty-cycle
V
V
To outputs, V
T
V
I
I
I
I
V
V
C
C
C
sink
sink
source
source
SD
SD
j
SD
SD
comp
C
L
L
= 20 V)
= 25 C
= 1 nF, T
= 1 nF, T
= 35 V
Test Conditions
= 20 mA
= 100 mA
= 0 V, V
= 2.5 V
= 2.5 V
= 2.5 V T
D
= 20 mA
= 100 mA
and V
= 0 ). Approximate oscillator frequency is defined by :
V
i
= 35 V
ss
SS
j
j
j
SS
= High
= 25 C
= 25 C
= 25 C
= 0 V
= 5.1 V
v
) according to the following equation : G
Min.
0.7
0.6
45
25
18
17
6
SG2525A
v
when the error amplifier output is loaded.
Typ.
0.05
100
0.9
3.3
0.4
0.8
0.4
0.2
0.2
49
50
19
18
50
14
1
7
Max.
200
600
300
3.6
0.7
0.5
0.4
80
20
0
1
1
1
2
8
Min.
0.7
0.6
25
18
17
45
v
6
= g
SG3525A
M
R
Typ.
0.05
100
L
0.9
3.3
0.4
0.8
0.4
0.2
0.2
49
50
19
18
50
14
where R
1
7
Max.
200
600
300
3.6
0.7
0.5
0.4
L
80
20
0
1
1
1
2
8
is the resistance
Unit
mA
mA
ns
ns
%
%
V
V
V
V
V
V
V
V
V
A
A
A
s