lt3517 Linear Technology Corporation, lt3517 Datasheet - Page 4

• Manufacturer Part Number: lt3517
• Description: Full-featured Led Driver With 1.5a Switch Current
• Manufacturer: Linear Technology Corporation

Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3517E is guaranteed to meet performance specifi cations
from 0°C to 125°C junction temperature. Specifi cations over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3517I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT3517H is guaranteed over the full –40ºC to
150ºC operating junction temperature range. Operating lifetime is derated
at junction temperatures greater than 125ºC
LT3517
ELECTRICAL CHARACTERISTICS
PARAMETER
TGEN Input High Voltage
TGEN Input Low Voltage
TGEN Pin Bias Current
V
V
Gate Turn-On Delay
Gate Turn-Off Delay
Top Gate Drive V
TYPICAL PERFORMANCE CHARACTERISTICS
4
temperature range, otherwise specifi cations are at T
REF
REF
120
100
Pin Voltage
Pin Line Voltage
80
60
20
40
0
0
V
V
V
V
T
ISP
IN
ISP
C
A
= 25°C
= 1V
0.2
= 5V
= 24V
– V
GS
0.4
ISN
(V
Threshold vs V
ISP
0.6
V
CTRL
– V
0.8
TG
(V)
)
1.0
1.2
CTRL
1.4
3517 G01
1.6
CONDITIONS
TGEN = 5V
I
3V < V
C
C
V
PWM = 0V
REF
LOAD
LOAD
ISP
2.0
1.5
1.0
0.5
0
= –100μA
= 24V, TGEN = 5V
A
0
Switch Current Limit
vs Duty Cycle
IN
= 1nF Between ISP and TG
= 1nF Between ISP and TG
T
= 25°C. (Note 2) V
A
< 40V
= 25°C
20
The
●
DUTY CYCLE (%)
denotes the specifi cations which apply over the full operating
40
Note 3: Absolute maximum voltage at V
is 40V for nonrepetitive 1 second transients and 30V for continuous
operation.
Note 4: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed the maximum operating junction temperature
when overtemperature protection is active. Continuous operation above
the specifi ed maximum operating junction temperature may impair device
reliability.
IN
60
= 5V, SHDN = 5V, PWM = 5V unless otherwise noted.
80
3517 G02
100
10000
1000
100
●
1
Oscillator Frequency vs R
T
A
MIN
1.96
1.5
= 25°C
IN
, SHDN, PWM and TGEN pins
TYP
100
200
200
2
7
0
R
T
10
(kΩ)
MAX
2.04
0.03
200
0.4
0.3
T
3517 G03
UNITS
3517f
%/V
100
μA
ns
ns
V
V
V
V
V