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LT3797 Datasheet(PDF) 30 Page - Linear Technology

Part # LT3797
Description  Triple Output LED Driver Controller
PDF  36 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3797 Datasheet(HTML) 30 Page - Linear Technology

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LT3797
30
3797f
For more information www.linear.com/LT3797
TYPICAL APPLICATIONS
3V to 5V Input, Triple Boost LED Driver
OVLO
CTRL1-3
VREF
RT
SYNC
SW1
BOOST
INTVCC
GND
VC1-3
FBH1-3
SW2
RT
12.4k
1MHz
0.1µF
LPWR
47µH
PWM1-3
FLT1-3
SS1-3
CIN1-3
47µF
×3
CIN4
10µF
0.1µF
10µF
3797 TA03
10nF
4.7k
499k
80.6k
VIN
3V TO 5V
30.1k
22.6k
59k
ISP1-3
EN/UVLO
D1-D3: VISAHY SILICONIX 30BQ015
L1-L3: VISAHY SILICONIX IHLP-2525CZ-01
LPWR: COILTRONICS SD25-470
M1, M3, M5: INFINEON BSC050N03LSG
M2, M4, M6: VISHAY SILICONIX Si7619DN
VIN
ISN1-3
GATE1 SENSEP1 SENSEN1 TG1
R1
0.01
R3
0.01
R5
0.01
M2
M4
M3
M6
M5
M1
D1
D2
D3
COUT1
22µF
COUT2
22µF
COUT3
22µF
L1
1.0µH
L2
1.0µH
L3
1.0µH
2A
8V
2A
8V
2A
8V
GATE2 SENSEP2 SENSEN2 TG2
LT3797
ISP3
ISN3
0.125
GATE3 SENSEP3 SENSEN3 TG3
ISP2
ISN2
0.125
ISP1
ISN1
0.125
0.1µF
0.1µF
0.1µF
1000:1 PWM Dimming at 120Hz
Efficiency vs VIN
VIN (V)
3
70
75
80
85
90
95
100
3.5
4
4.5
5
3797 TA03b
CTRL1-3 = 2V
PWM1-3 = 2V
PWM
5V/DIV
IL
5A/DIV
ILED
2A/DIV
2µs/DIV
3797 TA03c



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