一级代理商， 深圳市诚信联科技有限公司．联系人：古小姐， １３２４９８２７１７０／０７５５－８６０９１９６３ ＱＱ：１１３９１９６８０６
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20mA~150mA, 8 channels constant current regulator
Output current adjustable by external resistor
3V ~ 12V wide range supply voltage
1MHz OE PWM dimming support
0V ~ 17V output sustain voltage
low output voltage dropout
0.25V @ 40mA/ch (total 320mA output)
0.6V @ 150mA/ch (total 1.2A output)
z Minimized IDD consumption
z Low speed VDD dimming support
half power thermal protect
z 160
General LED Lighting
Decoration lighting for architecture
LCD back lighting
Street lamp
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z TSSOP 173 mil 20 pin
!4% chip current skew
Less than !9% channel to channel current skew
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Less than 0.5%/V line regulation
Less that 1%/V load regulation
25nS channel stagger output
Green package
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The NU508 is a dedicated designed constant current
LED driver for general lighting. It can drive 8 channel LEDs
simultaneously and provide each channel sink current up to
150mA.
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1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
The wide range of power supply capability makes the
NU508 be driven easily by a simple circuit. For example,
using a zener diode lowers down the VLED voltage for VDD or
just routing VDD pin into the LED loading loop gets popper
voltage for NU508.
In the application of dimming function, the OE pin can
switch all output channels on or off simultaneously with
25nS time stagger between odd and even channels. The fast
transient speed of OE function in NU508 is best for most of
dimming requirements and the stagger function will lower
the EMI generation in fast dimming situation.
While in full current output, the NU508 only need
about 0.6V drop on each output channel. This makes NU508
to be the lowest power lost LED driver that compared with
the other types of LED drivers. The minimized voltage drop
in NU508 will increase the efficiency of entire lighting
system and lower the heat generation from LED driver.
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VDD
NC
OE
NC
OUT0
OUT1
OUT2
OUT3
NC
NC
NC
NC
OUT4
OUT5
OUT6
OUT7
NC
REXT
NC
GND
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Power supply
Output enable
Output channel 1
Output channel 2
Output channel 3
Output channel 4
Output channel 5
Output channel 6
Output channel 7
Output channel 8
R external
Ground
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