Datasheet HVLED007 (STMicroelectronics) - 7

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HVLED007 Electrical characteristics Table 5. Electrical characteristics (continued) Symbol Parameter Test condition Min. Typ. Max. Unit
Equivalent dynamic RCOMP V resistance COMPlo < VCOMP < VCOMP_OL 8 12 19 k
Multiplier input
IMULT Input bias current VMULT = 0 to 4 V - - -1 μA VMULT Linear operation range - 0 to 3 - - V Vcs V - V/V Output max. slope MULT = 0 to Vcsmax 1 1.1 V V COMP = VCOMPsat.hi MULT - - KM Gain VMULT = 1 V, VCOMP = 5.25 V 0.375 0.4 0.45 1/V
Current sense comparator
ICS Input bias current VCS = 0 to VCSmax - - -1 μA td(H-L) Delay to output - - 240 - ns After turn-on of GD tLEB Leading edge blanking 100 200 300 ns VMULT = 1 V Current sense reference Tj = 25°C 1.25 1.3 1.35 VCSmax V V clamp COMP = VCOMPsat.hi - 1.2 - 1.4
Zero current detector
VZCDA Arming voltage Positive-going edge(3) 0.2 0.3 0.4 V VZCDT Triggering voltage Negative-going edge(3) 0.15 0.2 0.25 V VZCDL Lower clamp voltage IZCD = -50 μA to -2.5 mA -0.15 0 0.1 V Maximum operating VZCDmax - 7 - - V voltage V I ZCD = 1 V to VZCDmax ZCDb Input bias current - - 1 μA VCOMP<VCOMPsat.hi, VCT<VCT_OL IZCDsrc Source current capability VZCD = VZCDL - - 2.5 mA Masking time (after turn- VCOMP < VCOMP_OL 0.6 1 1.5 TMASK μs off of GD) VCOMP VCOMP_OL 1.8 3 4.5 Grounding switch ON- RDS(on) - - 300 - state resistance
Output overvoltage
OVP comparator VZCD_OVP Positive-going 5.3 5.5 5.7 V threshold
Starter
tSTART Start Timer period - 170 280 440 μs
Gate driver
VOL Output low voltage Isink = 100 mA - 0.6 1.2 V VOH Output high voltage Isource = 5 mA 9.5 10.3 - V Isrcpk Peak source current - -0.6 - - A DS12866 Rev 1 7/33 33 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