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nud4001/d
nud4001
high current led driver
this device is designed to replace discrete solutions for driving
leds in low voltage ac?dc applications 5.0 v, 12 v or 24 v. an
external resistor allows the circuit designer to set the drive current for
different led arrays. this discrete integration technology eliminates
individual components by combining them into a single package,
which results in a significant reduction of both system cost and board
space. the device is a small surface mount package (so–8).
features
? supplies constant led current for varying input voltages
? external resistor allows designer to set current – up to 500 ma
? offered in surface mount package technology (so?8)
? pb?free package is available
benefits
? maintains a constant light output during battery drain
? one device can be used for many different led products
? reduces board space and component count
? simplifies circuit and system designs
typical applications
? portables: for battery back?up applications, also simple ni?cad
battery charging
? industrial: low voltage lighting applications and small appliances
? automotive: tail lights, directional lights, back?up light,
dome light
pin function description
pin symbol description
1 v
in
positive input voltage to the device
2 boost this pin may be used to drive an external transistor
as described in the app note and8198/d.
3 r
ext
an external resistor between r
ext
and v
in
pins sets
different current levels for different application needs
4 gnd ground
5, 6, 7, 8 i
out
the leds are connected from these pins to ground
http://onsemi.com
device package shipping
?
ordering information
nud4001dr2 so?8 2500 / tape & reel
so?8
case 751
style 25
pin configuration
and schematic

ac-dc 輸入 5.0 v, 12 v or 24 v.輸出最大500ma，最簡(jiǎn)易型led驅(qū)動(dòng)ic