L6599ADTR STMicroelectronics, L6599ADTR Datasheet - Page 27

• Manufacturer Part Number: L6599ADTR
• Description: IC RESONANT CONVRTR CTRLR 16SOIC
• Manufacturer: STMicroelectronics

Specifications of L6599ADTR

• Applications: Resonant Converter Controller
• Voltage - Supply: 8.85 V ~ 16 V
• Current - Supply: 3.5mA
• Operating Temperature: 0°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 16
• Operating Supply Voltage: 8.15 V, 10.7 V, 17 V
• Maximum Operating Temperature: + 150 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• For Use With: 497-10542 - BOARD EVAL BASED ON L6599497-8429 - BOARD ADAPTER L6599/STP12NM50N497-5496 - EVAL BOARD FOR L6599
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -
• Lead Free Status / Rohs Status: Compliant
• Other names: 497-8519-2

L6599A
Figure 29. Soft-start and delayed shutdown upon overcurrent timing diagram
This function is realized with pin 2 (DELAY), by means of a capacitor C
resistor R
OCP comparator, in addition to discharging C
sources 150 µA from the DELAY pin and charges C
the OCP comparator and the internal current source will be repeatedly activated and C
will be charged with an average current that depends essentially on the time constant of the
current sense filtering circuit, on C
discharge due to R
typically much longer.
This operation will go on until the voltage on C
There is not a simple relationship that links T
determine C
order of 100 ms.
Once C
continuously regardless of the OCP comparator’s output, and the 150 µA current source is
continuously on, until the voltage on C
Equation 9
with T
frequency close to f
resonant circuit. As the voltage on C
PFC_STOP pin is pulled low. Also the internal generator is turned off, so that C
be slowly discharged by R
than 0.3 V, which will take:
Equation 10
MP
Delay
is expressed in ms and C
Delay
Delay
is charged at 2 V the internal switch that discharges C
connected to ground. As the voltage on the ISEN pin exceeds 0.8 V the first
experimentally. As a rough indication, with C
Delay
start
(see
T
can be neglected, considering that the associated time constant is
STOP
Delay
Section 7.3: Soft-start
Doc ID 15308 Rev 5
=
. The IC will restart when the voltage on C
R
Delay
SS
Delay
Delay
and the characteristics of the resonant circuit; the
T
Delay
C
MP
in µF. During this time the L6599A runs at a
Delay
is 3.5V, the L6599A stops switching and the
=
reaches 3.5 V. This phase lasts:
10
SH
ln
SS
Delay
⋅
3
0
, turns on an internal current generator that
C
to C
5 .
3 .
Delay
≈
reaches 2 V, which defines the time T
) to minimize the energy inside the
Delay
2
Delay
5 .
R
. During an overload/short-circuit
, thus it is more practical to
Delay
C
Delay
Delay
Application information
SS
= 1 µF T
is forced low
Delay
Delay
SH
and a parallel
will be less
Delay
will be in the
will now
Delay
27/36
SH
.