LM3407MY/NOPB National Semiconductor, LM3407MY/NOPB Datasheet - Page 2

• Manufacturer Part Number: LM3407MY/NOPB
• Description: IC LED DRVR HP CONST CURR 8-MSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: High Power, Constant Currentr

Specifications of LM3407MY/NOPB

• Constant Current: Yes
• Topology: PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Automotive
• Type - Secondary: High Brightness LED (HBLED)
• Frequency: 300kHz ~ 1MHz
• Voltage - Supply: 4.5 V ~ 30 V
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP Exposed Pad, 8-HMSOP, 8-eMSOP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 350mA
• Internal Switch(s): Yes
• Efficiency: 96%
• For Use With: LM3407EVAL - BOARD EVALUATION FOR LM3407
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Other names: LM3407MY; LM3407MY; LM3407MYTR

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Connection Diagram
Ordering Information
Pin Descriptions
Pin(s)
EP
1
2
3
4
5
6
7
8
Order Number
LM3407MYX
LM3407MY
Name
ISNS
VCC
GND
GND
DIM
VIN
EN
FS
LX
PWM Dimming Input pin Applying logic level PWM signal to this pin controls the average brightness of the
LED Current Sense pin Connect resistor R
Switching Frequency
Drain of N-MOSFET
Device Ground pin
Device Enable pin
Internal Regulator
Input Voltage pin
Thermal Pad
Description
Setting pin
Output pin
Switch
Package Type
eMSOP-8
Application Information
sensing resistor should be placed close to this pin.
LED string.
Applying logic high to this pin or leaving this pin open enables the switcher. When
this pin is pulled low, the switcher is disabled and will enter low power shutdown
mode.
Connect resistor R
The input voltage should be in the range of 4.5V to 30V.
This output pin should be bypassed by a ceramic capacitor with a minimum value
of 1µF. High quality X5R or X7R ceramic capacitor is recommended.
This pin should be connected to the system ground.
Connect this pin to the output inductor and anode of the Schottky diode.
The bottom pad should be connected to ground. For good thermal performance,
place 4 to 6 thermal vias from EP to bottom layer PCB ground plane.
8-Lead Plastic eMSOP-8 Package
Mini SOIC Exp Pad (MUY08A)
Top View
2
ISNS
FS
from this pin to ground to set the switching frequency.
NSC Package Drawing
from this pin to ground for LED current sensing. The current
MUY08A
30046602
1000 Units on Tape and Reel
3500 Units on Tape and Reel
Supplied As