Datasheet HVLED007 (STMicroelectronics)

HVLED007 Transition mode PFC controller for flyback converters Datasheet - Production data
converters operated in transition mode (aka quasi-resonant operation). Targeting both indoor and outdoor solid-state lighting applications, it provides extended temperature range operation down to -40 °C with guaranteed electrical specification. The main feature of this IC is a special circuit (Input Current Shaper, ICS), that enables High-PF quasi-resonant flyback converters to draw a theoretically sinusoidal input current from the
Features
power line, unlike the traditional control. In practice, with little effort it is possible to achieve Transition-mode (quasi-resonant) control of a total distortion of the input current (THD) lower flyback PFC pre-regulators than 10% at full load and lower than 20% at 30% Proprietary input current shaper for minimum load over the entire input voltage range. THD of line current The IC is provided with a control input intended Control input for isolated feedback and for being driven by the phototransistor of an optocoupler driving optocoupler to close a secondary-regulated Output overvoltage protection isolated control loop. However, with the addition of a simple external circuitry it can be used to Overload and short-circuit protection close a primary-regulated voltage loop as well. Low (≤ 60 μA) start-up current and low (≤ 4 ma) The HVLED007 includes protection features to quiescent current handle overload, short-circuit and overvoltage Digital leading-edge blanking on current sense conditions. -600/+800 mA totem pole gate driver with The totem-pole output stage, capable of 600 mA UVLO pull-down and voltage clamp source and 800 mA sink current, is suitable for big SO8 package MOSFET drives which, combined with the other features, makes the device an excellent low-cost
Applications
solution for EN61000-3-2 compliant SMPS up to 100 W. Flyback PFC converters for: AC-DC LED drivers for domestic, commercial
Table 1. Device summary
and industrial lighting
Order code Package Packaging
Street lighting HVLED007 Tube EN61000-3-2 compliant SMPS SO8 HVLED007TR Tape and Reel
Description
The HVLED007 is a current-mode PFC controller specific for isolated high power factor, flyback January 2019 DS12866 Rev 1 1/33 This is information on a product in full production. www.st.com Document Outline Table 1. Device summary 1 Block diagram Figure 1. Block diagram Table 2. Absolute maximum ratings 2 Pin connections Figure 2. Pin connection (top view) Table 3. Thermal data Table 4. Pin functions (continued) 3 Electrical characteristics Table 5. Electrical characteristics (continued) 4 Application information 4.1 Introduction Figure 3. Input current distortion in Hi-PF QR flyback converters with traditional TM control: current shape and resulting total harmonic distortion and power factor vs. Kv (= Vinpk/VR) ratio 4.2 Input current shaping function - operating principle Figure 4. Hi-PF QR flyback converter with the traditional TM control: current waveforms Figure 5. Input current shaper (ICS) block and its interconnection with HVLED007 control Figure 6. Key waveforms of the ICS circuit in figure 5 Figure 7. Shape of the current reference Vcsref(θ) (5) at different input voltages (i.e. Kv values) 4.3 Operation of a Hi-PF QR flyback converter based on the HVLED007 Table 6. Timing quantities in a HVLED007-based Hi-PF QR flyback converter Table 7. Control quantities in a HVLED007-based Hi-PF QR flyback converter Table 8. Electrical quantities in a HVLED007-based Hi-PF QR flyback converter 4.4 Shaping capacitor (Ct) selection (pin CT) 4.5 Control input for isolated feedback and optocoupler driving (pin COMP) Figure 8. Output characteristic of pin COMP and significant levels 4.6 Multiplier input for input voltage sensing (pin MULT) 4.7 Current sensing input (pin CS). Sense resistor (Rs) selection Figure 9. Effect of ripple on Ct on current sense signal: a) within linear dynamics, close to clamp level; b) signal slightly exceeding clamp level; c) signal exceeding clamp level, with OCP activation 4.8 Zero current detection and triggering block (pin ZCD); starter 4.9 Overload and short-circuit protection (OCP function) Figure 10. Functional schematic of the overload and short-circuit protection function 4.10 Overvoltage protection (OVP function) Figure 11. Functional schematic of the OVP function 4.11 Soft-restart function Figure 12. Functional schematic of the soft restart function 4.12 Suggested step-by-step design procedure of a Hi-PF QR flyback converter based on the HVLED0007 Table 9. Basic electrical specification and key parameters of a Hi-PF QR flyback Figure 13. Typical application schematic (reference for suggested design procedure) 5 Referenced documents 6 Package information Table 10. SO-8 mechanical data Figure 14. Package dimensions 7 Revision history Table 11. Document history