OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LT3797IUKG#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36
LT3797
4
3797fa
For more information www.linear.com/LT3797
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 24V; EN/UVLO = 24V; CTRL1, CTRL2, CTRL3, PWM1, PWM2,
PWM3 = 2V; SENSEN1, SENSEN2, SENSEN3 = 0V, OVLO = 0V, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
ISN1, ISN2, ISN3 Input Bias Current (Idle) PWM1, PWM2, PWM3=0V , ISP1, ISP2, ISP3, ISN1,
ISN2, ISN3 = 48V
0 1 µA
PWM1, PWM2, PWM3, ISP1, ISP2, ISP3, ISN1, ISN2,
ISN3 = 0V
–20 nA
LED Current Sense Amplifier g
m
ISP1-ISN1, ISP2-ISN2, ISP3-ISN3 = 250mV 250 μS
FBH1, FBH2, FBH3 Regulation Voltage “FBH(REG)”
(|ISP1-FBH1, ISP2-FBH2, ISP3-FBH3|)
ISP1, ISP2, ISP3, ISN1, ISN2, ISN3 = 48V
l
1.225 1.250 1.275 V
FBH1, FBH2, FBH3 Pin Input Bias Current ISP1-FBH1, ISP2-FBH2, ISP3-FBH3 = 1.25V
ISP1-FBH1, ISP2-FBH2, ISP3-FBH3 = –1.25V
2
40
2.4
100
3
nA
µA
FBH1, FBH2, FBH3 Amplifier g
m
|ISP1-FBH1|, |ISP2-FBH2|, |ISP3-FBH3| = 1.25V 480 μS
FBH1, FBH2, FBH3 Open-LED Threshold
(|ISP1-FBH1|, |ISP2-FBH2|, |ISP3-FBH3|) Voltage
Rising (Note 4)
ISP1, ISP2, ISP3, ISN1, ISN2, ISN3 = 48V
FBH(REG)
– 0.07
FBH(REG)
– 0.05
FBH(REG)
– 0.04
V
Hysteresis 20 mV
FBH1, FBH2, FBH3 Overvoltage Threshold
(|ISP1-FBH1|, |ISP2-FBH2|, |ISP3-FBH3|) V
oltage
Rising (Note 4)
ISP1, ISP2, ISP3, ISN1, ISN2, ISN3 = 48V
FBH(REG)
+ 0.05
FBH(REG)
+ 0.06
FBH(REG)
+ 0.085
V
Hysteresis 25 mV
VC1, VC2, VC3 Output Impedance 10 MΩ
VC1, VC2, VC3 Standby Input Bias Current PWM1, P
WM2, PWM3 = 0V
CTRL1, CTRL2, CTRL3 = 0V
–20
–20
20
20
nA
nA
VC1, VC2, VC3 Current Mode Gain –ΔV
VC
/ΔV
SENSE
4 V/V
VC1, VC2, VC3 Source Current ISP1, ISP2, ISP3, ISN1, ISN2, ISN3, FBH1, FBH2,
FBH3 = 48V, Current Out of Pin
10.5 µA
VC1, VC2, VC3 Sink Current ISP1, ISP2, ISP3, FBH1, FBH2, FBH3 = 48V,
ISN1, ISN2, ISN3 = 47.7V
12 µA
ISP1, ISP2, ISP3, ISN1, ISN2, ISN3 = 48V,
FBH1, FBH2, FBH3 = 46.7V
32 µA
Oscillator
Switching Frequency R
T
= 154kΩ
R
T
= 35.7kΩ
R
T
= 12.4kΩ
l
95
375
950
100
400
1000
107
425
1050
kHz
kHz
kHz
RT V
oltage 1.05 V
GATE1, GATE2, GATE3 Minimum Off-Time C
GATE
= 3300pF 200 270 ns
GATE1, GATE2, GATE3 Minimum On-Time C
GATE
= 3300pF 220 300 ns
SYNC Input Low
l
0.4 V
SYNC Input High
l
1.5 V
SYNC Resistance to GND 200 kΩ
Logic Inputs/Outputs
EN/UVLO Threshold Voltage Falling
l
1.180 1.220 1.250 V
EN/UVLO Rising Hysteresis 20 mV
EN/UVLO Input Low Voltage I
VIN
Drops Below 1µA 0.4 V
EN/UVLO Pin Bias Current Low EN/UVLO = 1.15V
l
1.5 2 2.6 µA
EN/UVLO Pin Bias Current High EN/UVLO = 1.33V 40 100 nA
OVLO Pin Input Bias Current 20 100 nA
OVLO Threshold Voltage Rising
Hysteresis
l
1.225 1.250
125
1.275 V
mV
LT3797
5
3797fa
For more information www.linear.com/LT3797
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 24V; EN/UVLO = 24V; CTRL1, CTRL2, CTRL3, PWM1, PWM2,
PWM3 = 2V; SENSEN1, SENSEN2, SENSEN3 = 0V, OVLO = 0V, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
PWM1, PWM2, PWM3 Input High Voltage
l
1.1 1.4 V
PWM1, PWM2, PWM3 Input Low Voltage
l
0.6 0.9 V
PWM1, PWM2, PWM3 Resistance to GND 200 kΩ
F LT 1, F LT 2, F LT 3 Output Low I
F LT
=1mA 300 mV
SS1, SS2, SS3 Sourcing Current SS1, SS2, SS3 = 1V, Current Out of Pin 28 µA
SS1, SS2, SS3 Sinking Current SS1, SS2, SS3 = 1V, OVLO =1.3V 2.8 µA
SS1, SS2, SS3 Soft-Start Reset Threshold Falling, Measured on SS1, SS2, SS3
Hysteresis
160
30
mV
mV
SS1, SS2, SS3 Fault Reset Threshold Measured on SS1, SS2, SS3 1.7 V
NMOS Gate Drivers
GATE1, GA
TE2, GATE3 Output Rise Time (t
r
) C
GATE
= 3300pF (Note 5) 25 ns
GATE1, GATE2, GATE3 Output Fall Time (t
f
) C
GATE
= 3300pF (Note 5) 25 ns
Gate Output Low (V
OL
) 0.1 V
Gate Output High (V
OH
) INTV
CC
–
0.05
V
PMOS Gate Drivers
TG1, TG2, TG3 Turn-On Time C
TG
= 1000pF, ISP1, ISP2, ISP3, FBH1, FBH2,
FBH3 = 48V (Note 6)
200 ns
TG1, TG2, TG3 Turn-Off T
ime C
TG
= 1000pF, ISP1, ISP2, ISP3, FBH1, FBH2,
FBH3 = 48V (Note 6)
70 ns
PMOS Gate On Voltage
(ISP1-TG1, ISP2-TG2, ISP3-TG3)
ISP1, ISP2, ISP3, FBH1, FBH2, FBH3 = 48V 6.5 V
PMOS Gate Off Voltage
(ISP1-TG1, ISP2-TG2, ISP3-TG3)
ISP1, ISP2, ISP3, FBH1, FBH2, FBH3 = 48V 0.3
V
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:
Do not apply a positive or negative voltage or current source
to SW1, SW2, GATE1, GATE2, GATE3, TG1, TG2, TG3 pins, otherwise
permanent damage may occur.
Note 3: The LT3797E is guaranteed to meet performance specifications
from the 0°C to 125°C junction temperature. Specifications over the
–40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LT3797I is guaranteed over the full –40°C to 125°C operating junction
temperature range.
Note 4:
FBH(REG) denotes the regulation voltage (|ISP-FBH|) of the
corresponding FBH pin.
Note 5: Rise and fall times are measured at 10% and 90% levels.
Note 6: Gate turn-on/turn-off time is measured from 50% level of PWM
voltage to 90% level of gate on/off voltage.
Note 7: The INTV
CC
regulation voltage is tested in an open loop. Closed
loop operation is guaranteed by design and process controls.
LT3797
6
3797fa
For more information www.linear.com/LT3797
Typical perForMance characTerisTics
V
ISP-ISN
Threshold at
CTRL = 0.7V vs Temperature
ISP/ISN Input Bias Current
vs V
ISP
, V
ISN
V
ISP-ISN
Threshold vs V
|ISP-FBH|
|ISP-FBH| Regulation Voltage
vs Temperature, V
ISP
V
REF
Voltage vs Temperature V
REF
Voltage vs V
IN
V
ISP-ISN
Threshold vs V
CTRL
V
ISP-ISN
Threshold vs V
ISP
V
ISP-ISN
Full-Scale Threshold
vs Temperature
T
A
= 25°C unless otherwise noted.
TEMPERATURE (°C)
–50
V(ISP-ISN) THRESHOLD (mV)
253
25
3797 G03
250
248
–25 0 50
247
246
254
252
251
249
75 100 125
V
ISP
= 48V
V
ISP
, V
ISN
(V)
0
ISP, ISN BIAS CURRENT (µA)
300
400
500
60
ISP
ISN
100
3797 G05
200
100
0
20 40 80
600
700
800
V
|ISP-FBH|
(V)
1.1
0
V
(ISP-ISN)
THRESHOLD (mV)
50
100
150
200
250
300
V
ISP
= 48V
1.15 1.2 1.25 1.3
3797 G06
TEMPERATURE (°C)
–50
1.240
V
|ISP-FBH|
(V)
1.245
1.250
1.255
1.260
–25 0 25 50
3797 G07
75 100 125
V
ISP
= 4.5V
V
ISP
= 100V
V
ISP
= 48V
TEMPERATURE (°C)
–50
V
REF
(V)
2.03
25
3797 G08
2.00
1.98
–25 0 50
1.97
1.96
2.04
2.02
2.01
1.99
75 100 125
I
REF
= 0µA
I
REF
= 450µA
V
IN
(V)
0
1.990
V
REF
(V)
1.995
2.000
2.005
2.010
5 10 15 20
3797 G09
25 30 35 40
V
ISP
(V)
0
V
(ISP-ISN)
THRESHOLD (mV)
249
250
251
60
100
3797 G02
248
247
246
20 40 80
252
253
254
V
CTRL
(V)
0
0
V
ISP-ISN
THRESHOLD (mV)
50
100
150
200
0.4 0.8
1.2
1.6
3797 G01
250
300
0.2 0.6
1.0
1.4
TEMPERATURE (°C)
–50
V
ISP-ISN
THRESHOLD (mV)
201
202
203
25 75
3797 F04
200
199
–25 0
50 100 125
198
197
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36

LT3797IUKG#TRPBF

Mfr. #:
Buy LT3797IUKG#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
LED Lighting Drivers 3x Out LED Drvr Cntr
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet