L6599ATD STMicroelectronics, L6599ATD Datasheet - Page 24

• Manufacturer Part Number: L6599ATD
• Description: IC RESONANT CONVRTR CTRLR 16SOIC
• Manufacturer: STMicroelectronics

Specifications of L6599ATD

• Applications: Resonant Converter Controller
• Voltage - Supply: 8.85 V ~ 16 V
• Current - Supply: 3.5mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Number Of Outputs: Single Output
• Output Voltage: 13.3 V
• Switching Frequency: 200 KHz
• Duty Cycle (max): 52 %
• Operating Supply Voltage: 8.85 V to 16 V
• Supply Current: 3.5 mA
• Maximum Operating Temperature: + 150 C
• Minimum Operating Temperature: - 40 C
• Fall Time: 30 ns
• Mounting Style: SMD/SMT
• Rise Time: 60 ns
• For Use With: 497-10542 - BOARD EVAL BASED ON L6599
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Application information
24/31
Figure 13. Line sensing function: internal block diagram and timing diagram
With reference to
(Vin
Equation 11
which, solved for R
Equation 12
While the line undervoltage is active the start-up generator continues working but there is no
PWM activity, thus the V
between the start-up and the UVLO thresholds, as shown in the timing diagram of
Figure 13
As an additional measure of safety (e.g. in cases where the low-side resistor is open or
missing, or in non-power factor corrected systems in cases of abnormally high input voltage)
if the voltage on the pin exceeds 7 V, the L6599AT is shut down. If its supply voltage is
always above the UVLO threshold, the IC restarts as the voltage falls below 7 V.
The LINE pin, while the device is operating, is a high impedance input connected to high
value resistors, thus it is prone to pick up noise, which might alter the OFF threshold or give
origin to undesired switch-off of the IC during ESD tests. It is possible to bypass the pin to
ground with a small film capacitor (e.g. 1-10 nF) to prevent any malfunctioning of this kind. If
ON
) and OFF (Vin
.
Vin
Figure 11
H
ON
and R
R
R
OFF
H
−
H
cc
. 1
=
) thresholds of the input voltage:
24
voltage (if not supplied by another source) continuously oscillates
L
Vin
, the following relationships can be established for the ON
, yield:
=
13
ON
Doc ID 15534 Rev 3
13
⋅
−
10
⋅
10
Vin
−
6
−
6
OFF
+
. 1
;
R
24
L
R
L
=
R
Vin
H
Vin
OFF
R
OFF
. 1
H
−
24
. 1
−
24
. 1
24
=
. 1
R
24
L
L6599AT