LM3405AXMY/NOPB National Semiconductor, LM3405AXMY/NOPB Datasheet - Page 17

• Manufacturer Part Number: LM3405AXMY/NOPB
• Description: IC LED DRVR HP CONST CURR 8-MSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: High Power, Constant Currentr

Specifications of LM3405AXMY/NOPB

• Constant Current: Yes
• Topology: PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Flash/Torch
• Type - Secondary: High Brightness LED (HBLED), White LED
• Frequency: 1.2MHz ~ 1.9MHz
• Voltage - Supply: 3 V ~ 22 V
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP Exposed Pad, 8-HMSOP, 8-eMSOP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 1A
• Internal Switch(s): Yes
• Efficiency: 92%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Other names: LM3405AXMYTR

Bill of Materials for Figure 18
Part ID
U1
C1, Input Cap
C2, Output Cap
C3, Boost Cap
C4, Feedforward Cap
D1, Catch Diode
D2, Boost Diode
D3, Zener Diode
L1
R1
LED1
LED2
FIGURE 18. V
Part Value
1A LED Driver
10µF, 25V, X5R
1µF, 16V, X7R
0.01µF, 16V, X7R
1µF, 16V, X7R
Schottky, 0.5V at 1A, V
Schottky, 0.36V at 15mA
3.6V, 350mW, SOT-23
6.8µH, 1.5A
0.2Ω, 0.5W, 1%
1.5A, White LED
1.5A, White LED
BOOST
derived from V
( V
R
IN
= 30V SS13
= 18V, I
OUT
17
Part Number
LM3405A
ECJ-3YB1E106K
GRM319R71A105KC01D
0805YC103KAT2A
GRM319R71A105KC01D
CMDSH-3
BZX84C3V6
SLF6028T-6R8M1R5
WSL2010R2000FEA
LXK2-PW14
LXK2-PW14
through a Series Zener Diode (D3)
F
= 1A )
Manufacturer
National Semiconductor
Panasonic
Murata
AVX
Murata
Vishay
Central Semiconductor
Fairchild
TDK
Vishay
Lumileds
Lumileds
30015250
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