lm5025bmtcx National Semiconductor Corporation, lm5025bmtcx Datasheet - Page 6

• Manufacturer Part Number: lm5025bmtcx
• Description: Active Clamp Voltage Mode Pwm Controller
• Manufacturer: National Semiconductor Corporation

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Soft-Start
Oscillator
PWM Comparator
Volt x Second Clamp
UVLO Shutdown
Output Section
Electrical Characteristics
Symbol
Specifications with standard typeface are for T
Temperature range. V
CS2 Sink Impedance
(Post Fault Discharge)
CS1 and CS2
Leakage Current
Soft-start Current
Source Normal
Soft-start Current
Source following a
CS2 event
Frequency1
Frequency2
Sync threshold
Min Sync Pulse Width
Sync Frequency
Range
Delay to Output
Maximum Duty Cycle
1
Maximum Duty Cycle
2
COMP to PWM Offset
COMP Input Current
Ramp Clamp Level
Undervoltage
Shutdown Threshold
Undervoltage
Shutdown Hysteresis
OUT_A High
Saturation
OUTPUT_A Peak
Current Sink
OUT_A Low
Saturation
OUTPUT_A Rise Time
OUTPUT_A Fall Time
Parameter
IN
= 48V, V
CC
CS2 = 0.6V
CS = CS Threshold -
100mV
T
T
RT = 13.3 kΩ
T
T
COMP step 5V to 0V
Time to onset of OUT_A
transition low
Measured at OUT_A
Measured at OUT_A;
RT = 13.3K
COMP = 4V, SS open
Delta RAMP measured
from onset of OUT_A to
Ramp peak.
COMP = 5V
MOS Device
-10mA,
Bipolar Device
MOS Device
10mA,
C
C
= 10V, RT = 26.7kΩ, R
A
J
J
J
gate
gate
= T
= T
= 0˚C to 125˚C
= 25˚C
= 2.2nF
= 2.2nF
(Continued)
low
low
Conditions
J
to T
to T
= 25˚C, and those with boldface type apply over full Operating Junction
@
@
high
high
@
Iout =
Iout =
Vcc/2
SET
6
= 27.4kΩ) unless otherwise stated (Note 3)
0.75
2.44
Min
180
175
360
364
160
0.5
2.4
17
66
16
Typ
200
400
2.5
2.5
55
22
40
73
71
50
20
20
15
1
2
1
5
3
6
Max
1.15
2.56
220
225
440
436
100
1.5
2.6
95
27
75
80
24
10
1
9
Units
kHz
kHz
kHz
µA
µA
µA
µA
µA
ns
ns
ns
ns
%
Ω
V
V
V
V
Ω
A
Ω