FL7733 Series

Primary-Side-Regulated LED Driver with Power Factor Correction

Catalog

Primary-Side-Regulated LED Driver with Power Factor Correction

Part	Number of Outputs	Operating Temperature (Max)	Operating Temperature (Min)	Topology	Type	Package Name	Voltage - Supply (Max)	Mounting Type	Voltage - Output (Max)	Voltage - Output (Min)	Package Length	Package Width	Internal Switch(s)
ON Semiconductor FL7733MX	1	125 °C	-40 °C	Flyback SEPIC Step-Down (Buck) Step-Up (Boost)	AC DC Offline Switcher	8-SOIC	30 V	Surface Mount	5 V	1.5 V	0.154 in	3.9 mm	No

Catalog

Primary-Side-Regulated LED Driver with Power Factor Correction

Key Features

• High Performance

• Cost-Effective Solution without Requiring Input Bulk Capacitor and Secondary Feedback Circuitry

• Power Factor Correction

• THD <10% Over Universal Line Range

• Constant Current Tolerance:

• < ±1% Over Universal Line Voltage Variation

• < ±1% by 50% - 100% Load Voltage Variation

• < ±1% by ±20% Magnetizing Inductance Variation

• High-Voltage Startup with VDDRegulation

• Adaptive Feedback Loop Control for Startup without OvershootHigh Reliability

• LED Short / Open Protection

• Output Diode Short Protection

• Sensing Resistor Short / Open Protection

• VDDOver-Voltage Protection (OVP)

• VDDUnder-Voltage Lockout (UVLO)

• All Protections are Auto Restart (AR)

• Over-Temperature Protection (OTP)

• Application Input Voltage Range: 80 VAC- 308 VAC

• Cycle-by-Cycle Current Limit

Description

This highly integrated PWM controller with advanced Primary-Side Regulation (PSR) technique provides features to enhance the performance of low-to-mid-power LED lighting converter. The FL7733 LED driver is designed with minimum system components while LED current is accurately controlled by ON Semiconductor’s TRUECURRENT® technique and improved feedback loop control. Constant Current (CC) tolerance less than ±1% over the universal line voltage range meets the requirement of highly reliable LED brightness management.By minimizing turn-on time fluctuation, high power factor, and low THD; <10% THD over the universal line range can be obtained. An integrated high-voltage startup circuit implements fast startup and high system efficiency. During startup, adaptive feedback loop control anticipates the steady-state condition and sets initial feedback condition close to the steady state to ensure no overshoot or undershoot of LED current.The FL7733 provides powerful protections, such as LED short / open, output diode short, sensing resistor short / open, and over-temperature for high system reliability. The FL7733 controller is available in an 8-pin Small-Outline Package (SOP).