L6585DETR ,Combo IC for PFC and half-bridge ballast controlL6585DE Combo IC for PFC and ballast control
L6585DETR ,Combo IC for PFC and half-bridge ballast controlBlock diagram April 2009 Rev 2 1/33www.st.com 33Contents L6585DEContents1 Pin settings ..
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L6585DE-L6585DETR
Combo IC for PFC and half-bridge ballast control
April 2009 Rev 2 1/33
L6585DE Combo IC for PFC and ballast control
Features PFC section transition mode PFC with over-current
protection over-voltage protection feedback disconnection under-voltage lockout PFC choke saturation detection THD optimizer Half-bridge section preheating and ignition phases
independently programmable 3 % oscillator precision 1.2 µs dead time programmable and precise end-of-life
protection compliant with all ballast
configurations smart hard switching detection fast ignition voltage control with choke
saturation detection half-bridge over-current control
Figure 1. Block diagram
Contents L6585DE2/33
Contents Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41.1 Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145.1 VCC section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2 PFC section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2.1 TM PFC operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2.2 Leading edge blanking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2.3 THD optimizer feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2.4 Over-voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2.5 Disabling the L6585DE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2.6 Feedback disconnection protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2.7 PFC over-current protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Ballast section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186.1 Half-bridge drivers and integrated bootstrap diode . . . . . . . . . . . . . . . . . 18
6.2 Normal start-up description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.3 Startup sequence with old or damaged lamps . . . . . . . . . . . . . . . . . . . . . 21
6.4 Old lamp management during run mode . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.5 Rectifying effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.6 Over-current protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.7 Hard switching protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
L6585DE Contents 3/33
6.8 Choke saturation protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Pin settings L6585DE
4/33
1 Pin settings
1.1 Connection
Figure 2. Pin connection (top view)
1.2 Functions
Table 1. Pin functions
L6585DE Pin settings
5/33
Table 1. Pin functions (continued)