LM3405AXMY/NOPB National Semiconductor, LM3405AXMY/NOPB Datasheet - Page 13

• 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

LM3405A Circuit Examples
Bill of Materials for Figure 14
Part ID
U1
C1, Input Cap
C2, Output Cap
C3, Boost Cap
C4, Feedforward Cap
D1, Catch Diode
D2, Boost Diode
L1
R1
LED1
Part Value
1A LED Driver
10µF, 6.3V, X5R
1µF, 10V, X7R
0.01µF, 16V, X7R
1µF, 10V, X7R
Schottky, 0.37V at 1A, V
Schottky, 0.36V at 15mA
4.7µH, 1.6A
0.2Ω, 0.5W, 1%
1.5A, White LED
FIGURE 14. V
( V
R
IN
= 10V MBRM110LT1G
BOOST
= 5V, I
13
derived from V
F
Part Number
LM3405A
C3216X5R0J106M
GRM319R71A105KC01D
0805YC103KAT2A
GRM319R71A105KC01D
CMDSH-3
SLF6028T-4R7M1R6
WSL2010R2000FEA
LXK2-PW14
= 1A )
IN
Manufacturer
National Semiconductor
TDK
Murata
AVX
Murata
ON Semiconductor
Central Semiconductor
TDK
Vishay
Lumileds
30015242
www.national.com