max5974 Maxim Integrated Products, Inc., max5974 Datasheet - Page 3

• Manufacturer Part Number: max5974
• Description: Active-clamped, Spread-spectrum, Current-mode Pwm Controllers
• Manufacturer: Maxim Integrated Products, Inc.

ELECTRICAL_CHARACTERISTICS_(continued)
(V
V
unless otherwise noted. Typical values are at T
GND
SYNCHRONIZATION_(SYNC)
Synchronization Logic-High
Input
Synchronization Pulse Width
Synchronization Frequency
Range
Maximum Duty Cycle During
Synchronization
DITHERING_RAMP_GENERATOR_(DITHER)
Charging Current
Discharging Current
Ramp’s High Trip Point
Ramp’s Low Trip Point
SOFT-START_AND_RESTART_(SS)
Charging Current
Discharging Current
Discharge Threshold to Disable
Hiccup and Restart
Minimum Restart Time During
Hiccup Mode
Normal Operating High Voltage
Duty-Cycle Control Range
DUTY-CYCLE_CLAMP_(DCLMP)
DCLMP Input Current
Duty-Cycle Control Range
NDRV_DRIVER
Pulldown Impedance
Pullup Impedance
Peak Sink Current
Peak Source Current
Fall Time
Rise Time
IN
= 12V (for MAX5974A/MAX5974C, bring V
, V
EN
PARAMETER
= +2V, NDRV = AUXDRV = SS = COMP = unconnected, R
Active-Clamped, Spread-Spectrum,
t
V
V
RSTRT-MIN
R
SYMBOL
R
V
V
t
t
I
DCLMP-R
f
SS-DMAX
NDRV-R
I
I
V
NDRV-F
DCLMP
SYNCIN
NDRV-N
IH-SYNC
SS-DTH
NDRV-P
SS-CH
SS-DH
I
SS-D
SS-HI
Current-Mode PWM Controllers
A
IN
= +25NC.) (Note 2)
up to 21V for startup), V
V
V
V
(V
V
t
D
V
D
1 - (V
I
I
C
C
RESTART
NDRV
NDRV
DITHER
DITHER
SS
SS
DCLMP
MAX
MAX
NDRV
NDRV
EN
= 2V, normal shutdown
= 2V, hiccup mode discharge for
< V
DCLMP /
(typ) = (V
(typ) =
(sinking) = 100mA
(sourcing) = 50mA
= 1nF
= 1nF
= 0 to 5V
ENF
= 0V
= 2.2V
(Note 3)
2.43V)
CONDITIONS
or V
SS-DMAX
IN
RT
< V
CS
= 34.8kI, R
INUVF
V
V
V
/2.46V)
= V
DCLMP
DCLMP
DCLMP
CSSC
),
= 0.5V
= 1V
= 2V
DT
= V
= 25kI, C
DITHER/SYNC
1.1 x
2.91
0.65
-100
14.7
MIN
f
9.5
1.6
45
43
73
54
SW
0
IN
D
MAX
= 1FF, T
= V
1024
TYP
1.34
0.15
75.4
16.5
0.65
f
0.4
1.9
4.7
50
SW
50
50
10
56
14
27
x f
2
2
5
0
1
FB
SYNC
= V
A
= -40NC to +85NC,
MAX
+100
/
10.5
77.5
18.3
FFB
f
2.4
3.4
8.3
2 x
55
57
58
SW
2
2
= V
DCLMP
UNITS
Cycles
Clock
kHz
mA
FA
FA
FA
FA
nA
ns
ns
ns
%
I
I
V
V
V
V
V
V
A
A
%
=
3