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SP7619ERL/TR Datasheet

  • SP7619ERL/TR

  • Constant Current LED Driver

  • 8頁

  • SIPEX

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Solved by
SP7619/19A
TM
Constant Current LED Driver
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FEATURES
Very low dropout voltage (60mV@200mA)
Accurate current regulation down to dropout
voltage
No external components
Selectable output current levels: 200mA &
500mA (700mA for SP769A)
Power-saving shutdown mode of 碌A(chǔ)
Fast turn-on (<50碌s)
Timeout function to protect the LED
Thermal Shutdown protection
RoHS compliant, Lead Free packaging:
Space saving 2mmx3mm 8pin DFN
LED
LED
VCC
EN
1
2
3
4
SP7619
8 Pin DFN
8
GNDP
7
GNDP
6
GND
5
CTRL
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APPLICATIONS
Next Generation Mobile Phones
PDA, DSC, MP3 Players
Handheld Computers
LCD Display Modules
GENERAL DESCRIPTION
The SP769 is a linear low-side, constant-current driver designed to drive high power LEDs
from an input voltage rail. The driver acts as a current source, ensuring constant LED cur-
rent across a range of input voltages. The SP769 allows implementing the lowest cost LED
driver for a variety of applications. Internal circuitry maintains the preset constant current
output for a wide voltage range at the LED input. The LED current can be set at 200mA
at torch mode or 500mA (700mA SP7619A) at flash mode by selecting CTRL pin low/high
respectively. Dimming or shutdown can be done by feeding a PWM signal to the EN pin.
Fast EN turn-on/off time allows for very fast dimming frequencies, completely eliminating
flicker. The built-in thermal protection automatically stops LED current to prevent overheat-
ing. A timeout function serves as a fail safe, shutting down the output at 500mA (700mA)
current after 4 seconds of continuous operation if the enable input is not cycled. The Enable
pin should be cycled HIGH/LOW/HIGH to restart the driver.
TYPICAL APPLICATION CIRCUIT
Feb 9-07 Rev E
Constant Current LED Driver
漏 2007 Sipex Corporation


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