L6599 STMicroelectronics, L6599 Datasheet - Page 28

• Manufacturer Part Number: L6599
• Description: High-voltage resonant controller
• Manufacturer: STMicroelectronics

Specifications of L6599

• Dimensions (l/w/h): 132 mm / 52 mm / 22 mm
• Universal Ac Mains Range: 90 VAC to 264 VAC
• High Output Power: 90 W (4.74 A, 19 VDC)
• Very Low Output Noise And Ripple: less than 300 m VP-P
• Very Low Standby Power: less than 0.5 W at 264 V
• Hiccup Mode: Auto recovery with SCP
• Latch Mode: OVP acts while VOUT > 29 VDC

Application information
28/36
Figure 33. Line sensing function: internal block diagram and timing diagram
With reference to
(Vin
which, solved for R
While the line undervoltage is active there is no PWM activity, thus the V
supplied by another source) continuously oscillates between the start-up and the UVLO
thresholds, as shown in the timing diagram of
As an additional measure of safety (e.g. in case the low-side resistor is open or missing, or
in non-power factor corrected systems in case of abnormally high input voltage) if the
ON
) and OFF (Vin
Figure 33
H
and R
OFF
) thresholds of the input voltage:
L
the following relationships can be established for the ON
, yield:
Vin
--------------------------------- -
R
ON
R
L
R
Vin
------------------------------------ -
H
H
=
–
=
1.25
OFF
R
Vin
----------------------------------------- -
R
H
H
⋅
–
=
ON
15 10
------------------------------------ -
Vin
1.25
15 10
Figure 33.
⋅
–
OFF
⋅
1.25
Vin
=
–
1.25
---------- -
6
–
–
R
OFF
6
1.25
H
+
1.25
---------- -
R
H
CC
voltage (if not
L6599