resonant controller. L6699 Datasheet

L6699 controller. Datasheet pdf. Equivalent

L6699 Datasheet
Recommendation L6699 Datasheet
Part L6699
Description Enhanced high voltage resonant controller
Feature L6699; L6699 Enhanced high voltage resonant controller Features ■ Symmetrical duty cycle, variable freque.
Manufacture STMicroelectronics
Datasheet
Download L6699 Datasheet




STMicroelectronics L6699
L6699
Enhanced high voltage resonant controller
Features
Symmetrical duty cycle, variable frequency
control of resonant half bridge
Self-adjusting adaptive deadtime
High-accuracy oscillator
2-level OCP: frequency-shift and immediate
shutdown
Interface with PFC controller
Anti-capacitive-mode protection
Burst-mode operation at light load
Input for brownout protection or power-on/off
sequencing
“Safe-start” procedure prevents hard switching
at startup
600 V rail compatible high-side gate driver with
integrated bootstrap diode and high dv/dt
immunity
-300/800 mA high-side and low-side gate
drivers with UVLO pull-down
SO16N package
Datasheet production data

3/.
Applications
SMPS for LCD TVs, desktop and AIO PCs,
servers, Telecom power
AC-DC adapter, open frame SMPS
Table 1. Device summary
Order codes
Package
L6699D
L6699DTR
SO16N
Packing
Tube
Tape and reel
Figure 1. Block diagram
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January 2013
This is information on a product in full production.
Doc ID 022835 Rev 2
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www.st.com
38



STMicroelectronics L6699
Contents
Contents
L6699
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.1 Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.2 Adaptive deadtime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.3 Safe-start procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7 Operation at no load or very light load . . . . . . . . . . . . . . . . . . . . . . . . . 21
8 Current sensing, OCP and OLP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9 Capacitive-mode detection function . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10 Line sensing function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
11 Latched shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
12 Bootstrap section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
13 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
14 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
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STMicroelectronics L6699
L6699
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Figure 27.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical system block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Multimode operation of the L6699 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Oscillator's internal block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Oscillator waveforms and their relationship with gate-driving signals. . . . . . . . . . . . . . . . . 14
Adaptive deadtime: principle schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Relevant timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Detailed view of deadtime during low-to-high transition of half bridge midpoint . . . . . . . . . 16
Comparison startup behavior: traditional controller (left), with L6699 (right) . . . . . . . . . . . 18
Comparison of initial cycles after startup: traditional controller (left), with L6699 (right). . . 19
Soft-start circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Input impedance vs. frequency curve in an LLC resonant half bridge . . . . . . . . . . . . . . . . 20
Narrow input voltage range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Wide input voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Load-dependent operating modes: timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
How the L6699 can switch off a PFC controller at light load . . . . . . . . . . . . . . . . . . . . . . . 23
Current sensing techniques with sense resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Current sensing techniques “lossless”, with capacitive shunt. . . . . . . . . . . . . . . . . . . . . . . 24
Soft-start and delayed shutdown upon overcurrent timing diagram
(safe-start details are not shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Details of hard-switching transition during capacitive-mode operation . . . . . . . . . . . . . . . . 28
Line sensing function: internal block diagram and timing diagram . . . . . . . . . . . . . . . . . . . 31
Bootstrap supply: standard circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Bootstrap supply: internal bootstrap synchronous diode . . . . . . . . . . . . . . . . . . . . . . . . . . 33
SO16N dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Package drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Recommended footprint (dimensions are in mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Doc ID 022835 Rev 2
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