LM5035A-1 National Semiconductor, LM5035A-1 Datasheet - Page 8

• Manufacturer Part Number: LM5035A-1
• Description: PWM Controller
• Manufacturer: National Semiconductor

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Soft-Start (SS Pin)
Oscillator (RT Pin)
PWM Controller (Comp Pin)
Main Output Drivers (HO and LO Pins)
Voltage Feed-Forward (RAMP Pin)
Synchronous Rectifier Drivers (SR1, SR2)
V
Symbol
PWM-OS
F
F
I
T1
T2
SW1
SW2
SS
Parameter
Charging current in normal
operation
Charging current during a hiccup
mode restart
Soft-stop Current Sink
Frequency 1 (at HO, half oscillator
frequency)
Frequency 2 (at HO, half oscillator
frequency)
DC level
Input Sync threshold
Delay to output
SS to RAMP offset
Minimum duty cycle
Small signal impedance
Output high voltage
Output low voltage
Rise time
Fall time
Deadtime, HO to LO, LO to HO
Peak source current
Peak sink current
HB Threshold
RAMP comparator threshold
Output high voltage
Output low voltage
Rise time
Fall time
Peak source current
Peak sink current
Deadtime, SR1 falling to HO rising,
SR2 falling to LO rising
Deadtime, HO falling to SR1 rising,
LO falling to SR2 rising
Conditions
V
V
V
R
R
R
SS = 0V
I
voltage
I
I
C
C
V
V
V
V
COMP current = 0
I
I
C
C
V
V
R
R
R
R
R
R
COMP
OUT
OUT
OUT
OUT
SS
SS
SS
DLY
HO,LO
HO,LO
CC
SR
SR
RT
RT
RT
LOAD
LOAD
LOAD
LOAD
DLY
DLY
DLY
DLY
DLY
DLY
= 0
= 0
= 2.5V
= 15 kΩ, T
= 15 kΩ, T
= 5.49 kΩ
rising
= 0, V
= V
= 50mA, V
= 100 mA
= 10mA, V
= 20 mA (sink)
= V
= 10k
= 27.4k
= 100k
= 10k
= 27.4k
= 100k
= 600µA, COMP current to PWM
= 1 nF
= 1 nF
= 1 nF
= 1 nF
= 0V, V
= 10V, V
VCC
REF
VCC
, V
, I
8
COMP
VCC
= 10V
VCC
J
J
HB
VCC
VCC
= 25°C
= -40°C to 125°C
= 10V
- V
= 10V
= 0mA
- V
= 10V
HO
SR1
, V
, V
VCC
VCC
- V
- V
LO
SR2
0.25
Min
185
180
430
0.6
2.5
0.7
0.5
2.4
80
80
45
68
20
5000
0.25
1.25
0.08
Typ
110
110
200
500
300
1.2
0.2
3.8
2.5
0.1
0.5
0.5
80
15
13
70
40
20
33
86
18
29
80
2
3
1
2
Max
140
140
215
220
570
100
120
1.8
3.4
1.2
0.5
2.6
0.2
42
0
Units
kHz
kHz
µA
µA
µA
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
Ω
V
V
V
V
V
A
A
V
V
V
V
A
A