L6599D STMicroelectronics, L6599D Datasheet - Page 29

• Manufacturer Part Number: L6599D
• Description: IC RESONANT CONVRTR CTRLR 16SOIC
• Manufacturer: STMicroelectronics
• Type: Phase Shift Resonant Controllersr

Specifications of L6599D

• 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 Current: 800 mA (Max)
• 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
• Supply Voltage Range: 8.85V To 16V
• Digital Ic Case Style: SOIC
• No. Of Pins: 16
• Operating Temperature Range: -40°C To +150°C
• Svhc: No SVHC (15-Dec-2010)
• Base Number: 6599
• Device Type: Power
• Rohs Compliant: Yes
• 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

L6599
7.7
voltage on the pin exceeds 7 V the device is shutdown. If its supply voltage is always above
the UVLO threshold, the IC will restart 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
the function is not used the pin has to be connected to a voltage greater than 1.25 V but
lower than 6V (worst-case value of the 7 V threshold).
Bootstrap section
The supply of the floating high-side section is obtained by means of a bootstrap circuitry.
This solution normally requires a high voltage fast recovery diode to charge the bootstrap
capacitor C
It is realized by means of a high voltage DMOS, working in the third quadrant and driven
synchronously with the low side driver (LVG), with a diode in series to the source, as shown
in
Figure 34. Bootstrap supply: internal bootstrap synchronous diode
The diode prevents any current can flow from the VBOOT pin back to V
supply is quickly turned off when the internal capacitor of the pump is not fully discharged.
To drive the synchronous DMOS it is necessary a voltage higher than the supply voltage
V
The bootstrap structure introduces a voltage drop while recharging C
side driver is on), which increases with the operating frequency and with the size of the
external power MOSFET. It is the sum of the drop across the R
across the series diode. At low frequency this drop is very small and can be neglected but,
as the operating frequency increases, it must be taken into account. In fact, the drop
reduces the amplitude of the driving signal and can significantly increase the R
external high-side MOSFET and then its conductive loss.
CC
Figure 34.
. This voltage is obtained by means of an internal charge pump
BOOT
Vcc
. In the L6599 a patented integrated structure, replaces this external diode.
12
LVG
L6599
16
14
OUT
VBOOT
DS(on)
Application information
(Figure
BOOT
C
and the forward drop
BOOT
CC
(i.e. when the low
in case that the
34).
DS(on)
of the
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