L6599DTR STMicroelectronics, L6599DTR Datasheet - Page 17

• Manufacturer Part Number: L6599DTR
• Description: IC RESONANT CONVRTR CTRLR 16SOIC
• Manufacturer: STMicroelectronics
• Type: Phase Shift Resonant Controllerr

Specifications of L6599DTR

• 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)
• Number Of Outputs: Single Output
• Output Current: 800 mA
• Switching Frequency: 500 KHz
• Operating Supply Voltage: 8.85 V to 16 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/STP12NM50N497-8265 - BOARD EVAL BASED ON L6599497-5857 - DEMO BOARD FOR L6599497-5856 - DEMO BOARD FOR L6599497-5497 - EVAL BOARD FOR L6599497-5496 - EVAL BOARD FOR L6599
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-6156-2

L6599
After fixing CF in the hundred pF or in the nF (consistently with the maximum source
capability of the RF
the value of RF
cover the entire range needed for regulation, from the minimum value f
voltage and maximum load) to the maximum value f
minimum load):
A different selection criterion will be given for RF
will be used (see "Operation at no load or very light load" section).
Figure 23. Oscillator waveforms and their relationship with gate-driving signals
In
signals, as well as the swinging node of the half-bridge leg (HB) is shown. Note that the low-
side gate-drive is turned on while the oscillator's triangle is ramping up and the high-side
gate-drive is turned on while the triangle is ramping down. In this way, at start-up, or as the
IC resumes switching during burst-mode operation, the low-side MOSFET will be switched
on first to charge the bootstrap capacitor. As a result, the bootstrap capacitor will always be
charged and ready to supply the high-side floating driver.
Figure 23
HVG
LVG
the timing relationship between the oscillator waveform and the gate-drive
HB
CF
min
and RF
min
pin and trading this off against the total consumption of the device),
max
T
will be selected so that the oscillator frequency is able to
D
RF
RF
min
T
D
max
=
=
------------------------------
3 CF f
⋅
-------------------- -
f
---------- - 1
f
RF
max
min
max
1
min
⋅
–
in case burst-mode operation at no-load
max
min
(at maximum input voltage and
Application information
min
(at minimum input
t
t
t
t
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