lm5020sdx-2 National Semiconductor Corporation, lm5020sdx-2 Datasheet - Page 5

• Manufacturer Part Number: lm5020sdx-2
• Description: 100v Current Mode Pwm Controller
• Manufacturer: National Semiconductor Corporation

Oscillator
PWM Comparator
Slope Compensation
Output Section
Thermal Shutdown
Tsd
Electrical Characteristics
Specifications in standard type face are for T
perature range. Unless otherwise specified: VIN = 48V, VCC = 10V, and RT = 31.6kΩ. (Note 3)
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device
is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The human body model is a 100 pF capacitor discharged through a 1.5kΩ resistor.
Note 3: Limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control
(SQC) methods. The limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Note 4: Device thermal limitations may limit usable range.
Note 5: Specification applies to the oscillator frequency. The operational frequency of the LM5020-2 devices is divided by two.
Symbol
Frequency1 (RT = 31.6k)
Frequency2 (RT = 9.76k)
Sync threshold
Delay to Output
Min Duty Cycle
Max Duty Cycle (-1 Device)
Max Duty Cycle (-2 Device)
COMP to PWM Comparator
Gain
COMP Open Circuit Voltage
COMP Short Circuit Current
Slope Comp Amplitude
(LM5020-1 Device Only)
Output High Saturation
Output Low Saturation
Rise Time
Fall Time
Thermal Shutdown Temp.
Thermal Shutdown Hysteresis
Parameter
(Continued)
J
= +25˚C and those in boldface type apply over the full operating junction tem-
(Note 5)
(Note 5)
COMP set to 2V,
CS stepped 0 to 0.4V,
Time to onset of OUT
transition low
COMP=0V
COMP=0V
Delta increase at PWM
Comparator to CS
Iout = 50mA, V
I
Cload = 1nF
Cload = 1nF
OUT
= 100mA, V
Conditions
CC
5
OUT
- V
OUT
Min
175
560
2.4
4.3
0.6
75
80
0.33
0.25
0.25
Typ
200
630
105
165
3.2
5.2
1.1
25
80
50
18
15
25
Max
0.75
0.75
225
700
130
3.8
6.1
1.5
85
0
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Units
kHz
kHz
mA
mV
ns
ns
ns
˚C
˚C
%
%
%
V
V
V
V