L6599
Product Page
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The L6599 controller integrates a resonant converter control
circuit and high voltage half bridge driver circuits capable
of operating at voltages up to 600V.
Using the new L6599, all the benefits of the resonant topology
(high efficiency and reduced EMI/RFI interference) can be
obtained with a simpler circuit, since all of the controller
features and all the driver circuits are integrated in one
SO-16 or DIP-16 package.
The L6599 includes a voltage controlled oscillator, soft
start, bootstrap diode, undervoltage lockout and a direct
interface with the PFC controller that enables the pre-regulator
to switch off during fault conditions. Operating at up
to 500kHz, it can be used with compact external filter
components, contributing to a further reduction in size.
The half bridge driver section has a current capability
of 300mA source and 800mA sink, which is sufficient to
efficiently drive high Power MOSFET or IGBT discrete transistors
at high frequencies. In addition, the new L6599 can be
operated in burst-mode by using the stand-by pin, facilitating
the converter to comply with energy saving recommendations. |
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| L6599 Features and Benefits |
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The L6599 is a double-ended controller specific for the
series-resonant half-bridge topology. It provides:
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50% duty cycle, variable frequency control
of resonant half-bridge |
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High-accuracy oscillator |
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Up to 500kHz operating frequency |
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Two-level OCP: frequency-shift and
latched shutdown |
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Interface with PFC controller |
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Latched disable input |
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Burst-mode operation at light load |
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Input for power-on/off sequencing or
brownout protection |
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Non-linear soft-start for monotonic
output voltage rise |
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600V rail compatible high-side gate
driver with integrated bootstrap diode and high DV/DT
immunity |
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-300/800mA high-side and low-side gate drivers
with UVLO pull-down |
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Component count minimization |
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Space saving |
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| ST's Resonant Controllers |
| Part
Number |
Input
Voltage
Range |
Gate
Drive
Capability |
Quiescent
Current (max) |
Package
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10.3 to 18V |
450 mA |
3mA |
SO-16N
DIP-16 |
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8.85 to 16V |
2mA |
2mA |
SO-16N
DIP-16 |
Typical system block diagram
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LCD and PDP TV |
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Desktop PC, entry-level server |
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Telecom SMPS |
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AC-DC adapter, oper frame SMPS |
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| Device |
Order
code |
Description |
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EVAL6599-90W |
19V-90W SMPS for
adapter |
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EVAL6599-200W* |
SMPS with auxiliary
for LCDTV |
*Coming soon |
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