© Semiconductor Components Industries, LLC, 2016 1 Publication Order Number:
February 2018 - Rev. 3 FL7740
FL7740
Constant-Voltage Primary-Side-
Regulation PWM Controller for
Power Factor Correction
The FL7740 provides accurate CV regulation in the steady state with
differentiated dynamic function to minimize overshoot and undershoot of
output voltage in line and load transient condition. Standby power is less
than 0.3 W for smart lighting application and power factor is higher than
0.9 even at half load condition when enabling PF optimizer for wide
output power scalability.
Startup time is less than 0.2 sec with built-in high voltage startup circuit
and output voltage quickly reaches to the target CV level by loop gain
transition technique during startup.
Various protections such as over load, output diode short, sensing resistor
short, output short and output over voltage protection guarantee high
system reliability.
Features
• Wide universal input range (90 V
AC
~ 305 V
AC
)
• Precise CV regulation in the steady state : < ± 3 %
• CV regulation in the load transient : < ±10 %
• Overshoot-less fast HV start up time ( < 0.2 sec )
• Low standby power
• PF higher than 0.9 at high-line and half load by PF optimizer
• Pulse-by-pulse current limit
• Output short protection
• Output over voltage protection
• Output diode short protection
• Sensing resistor short & open protection
• Over load protection
Typical Applications
• LED Lighting System
• AC-DC Adapters, TVs, Monitors
• Off Line Appliances Requiring Power Factor Correction
www.onsemi.com
MARKING DIAGRAM
ZXYKK
Z = Plant code
X = 1 digit year code
Y = 1 digit week code
KK = 2 digit lot traceability code
M = Package code
A = Product version
FL7740
MA
PIN CONNECTIONS
VDD
GND
GATE
CS
VS
HV
NC
COMV
BIAS
PF
ORDERING INFORMATION
See detailed ordering and shipping information in the
package dimensions section on page 13 of this data sheet.
