L6711TR STMicroelectronics, L6711TR Datasheet - Page 29

• Manufacturer Part Number: L6711TR
• Description: IC CTRLR 3PHASE VID/DACS 48-TQFP
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L6711TR

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 1.55 V
• Current - Output: 2A
• Frequency - Switching: 150kHz
• Voltage - Input: 12V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP Exposed Pad, 48-eTQFP, 48-HTQFP, 48-VQFP
• Power - Output: 2.5W
• Output Voltage: 0.8 V to 1.581 V
• Output Current: 95 A
• Input Voltage: 13.8 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5363-2; L6711TR

L6711
11.1
VID_SEL = OPEN.
Selecting the VRD10.x DAC, the device checks for VID code modifications on the rising
edge of a clock that is three times the switching frequency of each phase and waits for a
confirmation on the following falling edge. Once the new code is stable, on the next rising
edge, the reference starts stepping up or down in LSB increments (12.5mV) every clock
cycle (still 3·F
changes are ignored; the device re-starts monitoring VID after the transition has finished on
the next rising edge available.
Figure 14. Dynamic VID Transition, Hammer DAC
Warning:
Warning:
Int. Reference
VID Clock
VID [0,5]
V out
SW
) until the new VID code is reached. During the transition, VID code
if the new VID code is more than 1 LSB higher than the
previous, the device will execute the transition stepping the
reference with a frequency equal to 3·F
has reached: for this reason it is recommended to carefully
control the VID change rate in order to carefully control the
slope of the output voltage variation.
DVID sample and hold clock depends on the switching
frequency F
following the VID change rate, it is required to have at least 2
complete cycles of the F
transition. If the VID update-rate is, for example, 5 s, the
minimum operating frequency results to be F
T sw
SW
4 Step VID Transition - Hammer DAC
. To correctly perform DVID transition so
DVID
clock between every VID
SW
until the new code
Dynamic VID transitions
SW
> 133kHz.
t
t
t
t
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