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Part Number: LM3590
Description: The LM3590 is a White LED constant current driver capable of supplying up to 3 White LEDs connected in...
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LM3590
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DataSheet
General Description
LM3590 General Description
The LM3590 is a White LED constant current driver capable of supplying up to 3 White LEDs connected in series with 20mA. This device operates over a wide 6V-12.6V input voltage range. The output can accomodate LEDs with a combined forward voltage of up to 11.5V, from a 12V input supply. The LED drive current is programmed by using an external resistor on the ISET pin.
LED brightness can be linearly varied up to the programmed LED current by applying a Pulse Width Modulated (PWM) signal to the EN pin of the device. The LED output current of the LM3590 is tightly controlled over temperature and voltage. LED Current matching is guaranteed due to the series configuration of the LEDs. The series topology also simplifies the connection between the White LEDs in the display module and the LM3590 since only one connection is required.
The LM3590 typically draws only 50A when operating in the no-load condition and draws less than 0.1A when the device is shut down.
The LM3590 is available in a small 5-pin SOT23 package.
LM3590 Maximum Ratings
VIN .................................−0.3 to 13.0V Max
EN ...............................−0.3 to (VIN+0.3V) w/
.......................................13.0V max
Maximum Junction Temperature
(TJMAX) ....................................150°C
Storge Temperature .......................−65°C to +150°C
Maximum Lead Temperature .........................260°C
(Soldering, 5 sec.)
ESD Rating (Note 3)
Human Body Model ...............................1.5kV
Machine Model ..................................200V
EN ...............................−0.3 to (VIN+0.3V) w/
.......................................13.0V max
Maximum Junction Temperature
(TJMAX) ....................................150°C
Storge Temperature .......................−65°C to +150°C
Maximum Lead Temperature .........................260°C
(Soldering, 5 sec.)
ESD Rating (Note 3)
Human Body Model ...............................1.5kV
Machine Model ..................................200V
LM3590 Features
`Drives up to 3 stacked white LEDs
`6.0V-12.6V input voltage range
`Up to 20mA LED output current
`Excellent LED current matching guaranteed by series configuration
`Single connection to the White LEDs in the display module
`Tightly controlled programmable current source
`Low shutdown current (0.1A typ.)
`PWM brightness control
`Very small solution size
`SOT23-5 package: 3mm x 3mm x 1.0mm (LxWxH)
`6.0V-12.6V input voltage range
`Up to 20mA LED output current
`Excellent LED current matching guaranteed by series configuration
`Single connection to the White LEDs in the display module
`Tightly controlled programmable current source
`Low shutdown current (0.1A typ.)
`PWM brightness control
`Very small solution size
`SOT23-5 package: 3mm x 3mm x 1.0mm (LxWxH)
LM3590 Typical Application
· White LED Display Backlights
· Keypad Backlights
· General purpose constant current driver for high
forward-voltage LEDs
· Keypad Backlights
· General purpose constant current driver for high
forward-voltage LEDs
LM3590
PDF/DataSheet Download
- Datasheet: LM3590
- File Size: 210384 KB
- Manufacturer: NSC
- Click here to Download
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