L6699D STMicroelectronics, L6699D Datasheet - Page 3

• Manufacturer Part Number: L6699D
• Description: AC/DC Switching Converters Enhanced High Volt Res CTRL 600V
• Manufacturer: STMicroelectronics
• Type: High Voltage Controllersr

Specifications of L6699D

• Product Category: AC/DC Switching Converters
• Output Voltage: 13.3 V
• Input / Supply Voltage (max): 8.85 V
• Input / Supply Voltage (min): 16 V
• Switching Frequency: 235 kHz
• Supply Current: 3 mA
• Operating Temperature Range: - 25 C to + 125 C
• Mounting Style: SMD/SMT
• Package / Case: SO-16
• Number Of Outputs: 1
• Output Current: 800 mA

L6699
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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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