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LM3402 Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM3402
Description  0.5A Constant Current Buck Regulator for Driving High Power LEDs
PDF  22 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3402 Datasheet(HTML) 2 Page - National Semiconductor (TI)

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Connection Diagram
20192102
8-Lead Plastic MSOP-8 Package
NS Package Number MUA08A
Ordering Information
Order Number
Package Type
NSC Package Drawing
Supplied As
LM3402MM
MSOP-8
MUA08A
1000 units on tape and reel
LM3402MMX
3500 units on tape and reel
LM3402HVMM
1000 units on tape and reel
LM3402HVMMX
3500 units on tape and reel
Pin Descriptions
Pin(s)
Name
Description
Application Information
1
SW
Switch pin
Connect this pin to the output inductor and Schottky diode.
2
BOOT
MOSFET drive bootstrap pin
Connect a 10 nF ceramic capacitor from this pin to SW.
3
DIM
Input for PWM dimming
Connect a logic-level PWM signal to this pin to enable/disable the
power FET and reduce the average light output of the LED array.
4
GND
Ground pin
Connect this pin to system ground.
5
CS
Current sense feedback pin
Set the current through the LED array by connecting a resistor from
this pin to ground.
6
RON
On-time control pin
A resistor connected from this pin to VIN sets the regulator
controlled on-time.
7
VCC
Output of the internal 7V linear
regulator
Bypass this pin to ground with a minimum 0.1 µF ceramic capacitor
with X5R or X7R dielectric.
8
VIN
Input voltage pin
Nominal operating input range is 6V to 42V (LM3402) or 6V to 75V
(LM3402HV).
www.national.com
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