SP7120 Datasheet, PDF (1/17 Pages) Sipex Corporation – 2 or 3 Channel Low Dropout High Side Linear LED Driver

SP7120/22
2 or 3 Channel Low Dropout
High Side Linear LED Driver
FEATURES
• LED Driver for common cathode parallel
connected LEDs
• Ultra Low Dropout Voltage of 150mV
• No EMI, no switching noise
• Integrated current matching
• PWM and Analog brightness control
• Enable/Shutdown control
• Shutdown current < 1µA
• Lead Free, RoHS Compliant Package:
Small footprint SOT23-6
APPLICATIONS
• Mobile Phones
• PDA, DSC, MP3 players
• Handheld Computers
• Keypads and display backlight
GENERAL DESCRIPTION
The SP712X driver’s family provides a simple solution for a matched current source for any
color common cathode LED configuration. The common cathode connection allows the user to
increase the LED power dissipation by having the cathodes heat-sinked to the ground plane of
the circuit board. The SP7120 may drive two LEDs or one LED at twice the current with two
channels connected in parallel. The SP7122 can drive three LEDs or one LED at three times
the current. The factory preset current values are 15mA (version A), 20mA (version B), or 25mA
(version C) per channel. In shutdown mode (EN pin is LOW), the supply current drops to 40nA
typical. The SP712x drivers are available in a small footprint 6-pin SOT23-6 package.
APPLICATION SCHEMATIC
Jun29-07 RevD
C1 1nF
SP7120 Powering 2 LEDs
SP7120/22 Low Dropout LED Driver
page 1
© 2007 Sipex Corporation