lm5025cmtcx National Semiconductor Corporation, lm5025cmtcx Datasheet - Page 6

• Manufacturer Part Number: lm5025cmtcx
• Description: Active Clamp Voltage Mode Pwm Controller
• Manufacturer: National Semiconductor Corporation

www.national.com
Soft-Start
Oscillator
PWM Comparator
Volt x Second Clamp
UVLO Shutdown
Output Section
Output Timing Control
Symbol
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
Duty Cycle Range
COMP to PWM Offset
COMP Open Circuit
Voltage
COMP Short Circuit
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
OUT_B High Saturation
OUTPUT_B Peak Current
Sink
OUT_B Low Saturation
OUTPUT_B Rise Time
OUTPUT_B Fall Time
Overlap Time
Deadtime
Parameter
T
T
RT = 10.8 kΩ
COMP step 5V to 0V
Time to onset of OUT_A
transition low
COMP = 0V
Delta RAMP measured from
onset of OUT_A to Ramp peak.
COMP = 5V
MOS Device @ Iout = -10mA,
Bipolar Device @ Vcc/2
MOS Device @ Iout = 10mA,
C
C
MOS Device @ Iout = -10mA,
Bipolar Device @ Vcc/2
MOS Device @ Iout = 10mA,
C
C
R
GND, 50% to 50% transitions
R
REF, 50% to 50% transitions
A
J
gate
gate
gate
gate
SET
SET
= T
= 25°C
= 2.2nF
= 2.2nF
= 1nF
= 1nF
= 38 kΩ connected to
= 29.5 kΩ connected to
low
to T
Conditions
high
6
2.44
Min
180
175
510
160
0.5
0.7
4.3
0.6
2.4
65
16
75
75
0
Typ
200
580
105
105
2.5
2.5
90
40
20
20
15
10
12
20
15
1
2
1
1
5
3
6
1
Max
2.56
115
220
225
650
100
135
135
1.5
1.3
5.9
1.4
2.6
91
24
10
20
18
9
Units
kHz
kHz
kHz
mA
µA
µA
µA
ns
ns
ns
ns
ns
ns
ns
ns
%
Ω
Ω
Ω
Ω
V
V
V
V
V
A
A