© Semiconductor Components Industries, LLC, 2017
April, 2018 − Rev. 4
1 Publication Order Number:
FL7760/D
FL7760
High-Side Sensing
Constant Current Buck
Controller for High
Switching Frequency LED
Driver
The FL7760 is a constant current step−down CCM controller for
wide output power LED lighting applications. The FL7760 adapts
hysteretic reference architecture that accurately regulates LED current
by sensing voltage across an external high side sense resistor. This
control scheme can stabilize LED current against input voltage and
output load transient condition and implement optimal PWM and
analog dimming control. Time delay control method widens analog
dimming range down to less than 5%.
FL7760 has low 200 mV reference voltage to maximize system
efficiency and high frequency driving capability so that system profile
can be minimized in wide scale power ranges.
The FL7760 implements PWM and analog dimming together
through a DIM pin and provides thermal shutdown (TSD), and
under−voltage lockout (UVLO) protections.
Features
• Wide Input Range (8 VDC~70 VDC)
• Continuous Conduction Mode Operation
• Hysteretic LED Current Control
• Wide analog dimming range down to 5%
• Wide PWM dimming duty range to 0.2% at 2 kHz PWM freq.
• High switching frequency up to 1 MHz
• High source / sink current of 1.5 A / 2.5 A
• Cycle−by−Cycle Peak Current Limit
• Low Operating Current (300 uA)
• Low Stand−by Current (240 uA)
Typical Applications
• LED Lighting System
SOT23−6LD
CASE 527AJ
MARKING DIAGRAM
www.onsemi.com
See detailed ordering and shipping information on page 4 of
this data sheet.
ORDERING INFORMATION
60xT
(Top View)
VIN
SEN
GND
DRVVCC
60 : Production Identifier
x : Version (A or B)
T: Wafer Lot Code
Week Code
Year Code
