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L6759DTR Datasheet(PDF) 5 Page - STMicroelectronics

Part # L6759DTR
Description  Fully configurable through PMBus
Download  51 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6759DTR Datasheet(HTML) 5 Page - STMicroelectronics

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L6759D
List of figures
Doc ID 023240 Rev 1
5/51
List of figures
Figure 1.
Typical 3-phase application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2.
Typical 2-phase application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4.
Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 5.
JMode: voltage positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 6.
Device initialization: default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 7.
Device initialization: alternative sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 8.
Voltage positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 9.
Current reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 10.
DVID optimization circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 11.
Thermal monitor connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 12.
Output current vs. switching frequency in PSK mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 13.
Efficiency performances with and without enhancements (DPM, GDC) . . . . . . . . . . . . . . 36
Figure 14.
ROSC vs. FSW per phase (ROSC to GND - left; ROSC to 3.3V - right) . . . . . . . . . . . . . . . . 38
Figure 15.
LSLESS startup: enabled (left) and disabled (right) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 16.
Equivalent control loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 17.
Control loop Bode diagram and fine tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 18.
Device initialization: PMBus controlling Vout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 19.
VFQFPN48 (6x6 mm) package drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49


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