LT3956 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT3956' PDF : 20 Pages View PDF
LT3956
Typical Application
Buck Mode 1A LED Driver with High Dimming Ratio and Open LED Reporting
VIN
24V TO
80V
INTVCC
1M
61.9k
30.1k
10k
VIN
ISP
EN/UVLO
ISN
FB
VREF
CTRL
PWMOUT
LT3956
100k
VMODE
SW
0.1µF
PWM
SS
RT
28.7k VC GND INTVCC PGND
375kHz
47k
INTVCC
2.2nF
4.7µF
3956 TA07a
200k 200k
750Ω 0.1Ω 1A
200k
Q2
M1
20k
Q1
6 WHITE LEDs
20W
1k
L1
33µH
D1
C1 VIN
1µF
s 2
D1: DIODES INC B1100/B
L1: WÜRTH 74456133
M1: VISHAY SILICONIX Si5435BDC
Q1: ZETEX FMMT493
Q2: ZETEX FMMT593
C1: TDKC3226X7R2A105K
C2: TDKC3225X7RIE475K
C2
4.7µF
s 5
Efficiency vs VIN
100
96
92
88
84
80
20 30 40 50 60 70 80
VIN (V)
3956 TA06b
Related Parts
PART NUMBER
LT3756/LT3756-1/
LT3756-2
LT3755/LT3755-1/
LT3755-2
LT3474
LT3475
LT3476
LT3477
LT3478/LT3478-1
DESCRIPTION
COMMENTS
100VIN, 100VOUT, Full Featured LED Controller
VIN: 6V to 100V, VOUT(MAX) = 100V, True Color PWM Dimming = 3000:1,
ISD < 1µA, 3mm × 3mm QFN-16 and MS16E Packages
40VIN, 75VOUT, Full Featured LED Controller
VIN: 4.5V to 40V, VOUT(MAX) = 60V, True Color PWM Dimming = 3000:1,
ISD < 1µA, 3mm × 3mm QFN-16 and MS16E Packages
36V, 1A (ILED), 2MHz, Step-Down LED Driver
VIN: 4V to 36V, VOUT(MAX) = 13.5V, True Color PWM Dimming = 400:1,
ISD < 1µA, TSSOP16E Package
Dual 1.5A (ILED), 36V, 2MHz Step-Down LED Driver
VIN: 4V to 36V, VOUT(MAX) = 13.5V, True Color PWM Dimming = 3000:1,
ISD < 1µA, TSSOP20E Package
Quad Output 1.5A, 36V, 2MHz High Current LED Driver VIN: 2.8V to 16V, VOUT(MAX) = 36V, True Color PWM Dimming = 1000:1,
with 1000:1 Dimming
ISD < 10µA, 5mm × 7mm QFN Package
3A, 42V, 3MHz Boost, Buck-Boost, Buck LED Driver VIN: 2.5V to 25V, VOUT(MAX) = 40V, Dimming = Analog/PWM, ISD < 1µA,
QFN and TSSOP20E Packages
4.5A, 42V, 2.5MHz High Current LED Driver with
3000:1 Dimming
VIN: 2.8V to 36V, VOUT(MAX) = 42V, True Color PWM Dimming = 3000:1,
ISD < 3µA, TSSOP16E Package
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
3956f
LT 0510 • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 2010
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