Datasheet

3
LT1424-5
sn14245 14245fs
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Timing
f Switching Frequency 260 285 300 kHz
● 240 285 320 kHz
t
ON
Minimum Switch ON Time 170 200 260 ns
t
ED
Flyback Enable Delay Time 150 ns
t
EN
Minimum Flyback Enable Time 180 ns
Maximum Switch Duty Cycle ● 85 90 %
Load Compensation
∆V
REF
/∆I
SW
0.9 Ω
SYNC Function
Minimum SYNC Amplitude ● 1.5 2.2 V
Synchronization Range ● 330 450 kHz
SYNC Pin Input Resistance 40 kΩ
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be imparied.
Note 2: V
REF
is a parameter which is measured at the V
SW
pin. It differs
from the output voltage because it accounts for output diode drop,
transformer leakage inductance, etc. Nominal output voltage is 5V in the
intended application circuit.
Note 3: Feedback amplifier transconductance is R
REF
referred.
Note 4: Voltage gain is R
REF
referred.
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 5V, V
SW
Open, V
C
= 1.4V, unless otherwise specified.