L6599AD STMicroelectronics, L6599AD Datasheet - Page 12
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L6599AD
Manufacturer Part Number
L6599AD
Description
IC RESONANT CONVRTR CTRLR 16SOIC
Manufacturer
STMicroelectronics
Specifications of L6599AD
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
Number Of Outputs
Single Output
Topology
Half-Bridge
Output Voltage
1.5 V
Output Current
800 mA
Switching Frequency
500 KHz
Duty Cycle (max)
50 %
Operating Supply Voltage
8.85 V to 16 V
Supply Current
2 mA
Maximum Operating Temperature
+ 150 C
Minimum Operating Temperature
- 40 C
Fall Time
30 ns
Mounting Style
SMD/SMT
Output Power
0.83 W
Rise Time
60 ns
Synchronous Pin
No
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
L6599AD
Manufacturer:
ST
Quantity:
20 000
Company:
Part Number:
L6599ADTR
Manufacturer:
U-BLOX
Quantity:
21 000
Part Number:
L6599ADTR
Manufacturer:
ST
Quantity:
20 000
Part Number:
L6599ADTR-2LF
Manufacturer:
ST
Quantity:
20 000
Application information
6
12/31
Application information
The L6599A is an advanced double-ended controller specific for resonant half-bridge
topology (see
are alternately switched on and off (180° out-of-phase) for exactly the same time. This is
commonly referred to as operation at “50% duty cycle”, although the real duty cycle, that is
the ratio of the on-time of either switch to the switching period, is actually less than 50%.
The reason is that there is an internally fixed dead-time T
either MOSFET and the turn-on of the other one, where both MOSFETs are off. This dead-
time is essential in order for the converter to work correctly: it will ensure soft-switching and
enable high-frequency operation with high efficiency and low EMI emissions.
To perform converter's output voltage regulation the device is able to operate in different
modes
1.
2.
Figure 3.
Variable frequency at heavy and medium/light load. A relaxation oscillator (see
Section 6.1: Oscillator
which MOSFETs' switching is locked to. The frequency of this waveform is related to a
current that will be modulated by the feedback circuitry. As a result, the tank circuit
driven by the half-bridge will be stimulated at a frequency dictated by the feedback loop
to keep the output voltage regulated, thus exploiting its frequency-dependent transfer
characteristics.
Burst-mode control with no or very light load. When the load falls below a value, the
converter will enter a controlled intermittent operation, where a series of a few
switching cycles at a nearly fixed frequency are spaced out by long idle periods where
both MOSFETs are in OFF-state. A further load decrease will be translated into longer
idle periods and then in a reduction of the average switching frequency. When the
converter is completely unloaded, the average switching frequency can go down even
to few hundred hertz, thus minimizing magnetizing current losses as well as all
frequency-related losses and making it easier to comply with energy saving
recommendations.
(Figure
Multi-mode operation of the L6599A
Figure
3), depending on the load conditions:
4.). In these converters the switches (MOSFETs) of the half-bridge leg
for more details) generates a symmetrical triangular waveform,
Doc ID 15308 Rev 4
D
inserted between the turn-off of
L6599A