HT7L5610 Datasheet, PDF (1/9 Pages) Holtek Semiconductor Inc – Primary Side Regulation Off Line LED Driver with Active PFC

HT7L5610
Primary Side Regulation Off Line
LED Driver with Active PFC
Features
• Primary-side current sensing and regulation
without an opto-coupler
• Integrated 650V MOSFET
• Wide AC input range - from 85V_AC to 265V_AC
• High Power Factor of >0.9 without additional
circuitry
• Accurate constant current (< ±3%)
• Low start-up current which reduces power
dissipation
• Full protection functions for enhanced safety
♦♦ _{Gate driver output voltage clamp}
♦♦ _{VCC over voltage protection - VCC OVP}
♦♦ _{VCC under-voltage lockout with hysteresis - VCC}
UVLO
♦♦ _{Output LED string over current protection}
♦♦ _{Output LED string short / open protection}
♦♦ _{On-chip over temperature protection - OTP}
• 8-pin DIP package
Applications
• General illumination
• E26/27, T5/T8 LED Lamp
• Other LED Lighting Applications
General Description
The HT7L5610 is a single-stage, isolated, primary-
side offline LED lighting controller that has the
benefits of high power factor and a fully integrated
power MOSFET. Control of this power MOSFET is
implemented by regulating a constant LED current
accurately from the primary-side. This can signifi-
cantly simplify the LED lighting system design by
eliminating the secondary-side feedback components
and the usually required opto-coupler. The extremely
low start-up current and quiescent current reduces the
total power consumption to provide a high efficiency
solution for lighting applications.
The device provides several protection functions,
which include VCC Under Voltage Lockout (UVLO),
Over Current Protection (OCP), Output LED String
Open Protection, Output LED String Short Protection,
VCC Over Voltage Protection (OVP) and Leading-
Edge Blanking (LEB) for current sensing. Additional-
ly and to ensure system reliability, the device includes
a fully integrated thermal protection function.
The high level of functional integration minimises the
external component count giving major advantages
in terms of cost and circuit board area. The device is
supplied in an 8-pin DIP package.
Application Circuits
ACIN
VOUT+
VOUT-
SOURCE DRAIN
CS
DRAIN
GND
VCC
COMP
ZCD
HT7L5610
Rev. 1.00
1
September 08, 2015