Phase controller. L6711 Datasheet

L6711 controller. Datasheet pdf. Equivalent

Part L6711
Description 3 Phase controller
Feature www.DataSheet4U.com L6711 3 Phase controller with dynamic VID and selectable DACs Features ■ ■ 2A .
Manufacture STMicroelectronics
Datasheet
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L6711
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L6711
3 Phase controller with dynamic VID and selectable DACs
Features
2A integrated gate drivers
Fully differential current reading across
inductor or LS MOSFET
0.5% Output voltage accuracy
6 bit programmable output from 0.8185V to
1.5810V in 12.5mV steps
5 bit programmable output from 0.800V to
1.550V in 25mV steps
Dynamic VID management
Adjustable reference voltage offset
3% active current sharing accuracy
Digital 2048 step soft-start
Programmable over voltage protection
Integrated temperature sensor
Constant over current protection
Oscillator internally fixed at 150kHz (450kHz
ripple) externally adjustable
Output enable
Integrated remote sense buffer
TQFP48 7x7 Package with exposed pad
Applications
High current VRM/VRD for desktop / Server /
Workstation CPUs
High density DC/DC Converters
TQFP48 (Exposed Pad)
Description
The device implements a three phase step-down
controller with a 120° phase-shift between each
phase with integrated high current drivers in a
compact 7x7mm body package with exposed pad.
The device embeds selectable DAC: the output
voltage ranges from 0.8185V to 1.5810V with
12.5mV steps (VID_SEL = OPEN) or from 0.800V
to 1.550V with 25mV steps (VID_SEL = GND;
VID5 drives an optional +25mV offset) managing
dynamic VID with 0.5% accuracy over line and
temp variations. Additional programmable offset
can be added to the voltage reference with a
single external resistor.
The device assures a fast protection against load
over current and load over/under voltage. An
internal crowbar is provided turning on the low
side mosfet if an over-voltage is detected.
In case of over-current, the system works in
Constant Current mode until UVP.
Selectable current reading adds flexibility in
system design.
Order codes
Part Number
L6711
L6711TR
Package
TQFP48
TQFP48
Packing
Tube
Tape & Reel
April 2006
Rev 4
1/50
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L6711
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Contents
L6711
1 Typical application circuit and block diagram . . . . . . . . . . . . . . . . . . . . 4
1.1 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Pins description and connection diagrams . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 VID Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6 Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7 Current reading and current sharing control loop . . . . . . . . . . . . . . . . 19
7.1 Low-side current reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.2 Inductor current reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8 DAC Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9 Remote voltage sense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
10 Voltage positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
10.1 Droop function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
10.2 Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.3 Integrated thermal sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
11 Dynamic VID transitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
11.1 VID_SEL = OPEN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
11.2 VID_SEL = GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
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