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PDF L6714 Data sheet ( Hoja de datos )
| Número de pieza | L6714 | |
| Descripción | 4 phase controller | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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L6714
4 phase controller with embedded drivers
for Intel VR10, VR11 and AMD 6Bit CPUs
Features
■ 0.5% output voltage accuracy
■ 7/8 bit programmable output up to 1.60000V -
Intel VR10.x, VR11 DAC
■ 6 bit programmable output up to 1.5500V -
AMD 6Bit DAC
■ High current integrated gate drivers
■ Full differential current sensing across inductor
or low side MOSFET
■ Embedded VRD thermal monitor
■ Integrated remote sense buffer
■ Dynamic VID management
■ Adjustable reference voltage offset
■ Programmable Soft-Start
■ Low-Side-Less startup
■ Programmable over voltage protection
■ Preliminary over voltage
■ Constant over current protection
■ Oscillator internally fixed at 150kHz externally
adjustable
■ Output enable
■ SS_END / PGOOD signal
■ TQFP64 10mm x 10mm package
with Exposed Pad
Application
■ High current VRD for desktop CPUs
■ Workstation and server CPU power supply
■ VRM modules
Order codes
TQFP64 (Exposed Pad)
Description
L6714 implements a four phase step-down
controller with 90º phase-shift between each
phase with integrated high current drivers in a
compact 10mm x 10mm body package with
exposed pad.
The device embeds selectable DACs: the output
voltage ranges up to 1.60000V (both Intel VR10.x
and VR11 DAC) or up to 1.5500V (AMD 6Bit
DAC) managing D-VID with ±0.5% output voltage
accuracy over line and temperature variations.
Additional programmable offset can be added to
the reference voltage with a single external
resistor.
The controller assures fast protection against load
over current and under / over voltage (in this last
case also before UVLO). In case of over-current
the system works in Constant Current mode until
UVP.
Selectable current reading adds flexibility to the
design allowing current sense across inductor or
LS MOSFET.
System Thermal Monitor is also provided allowing
system protection from over-temperature
conditions.
Part number
Package
Packaging
L6714
L6714TR
TQFP64
TQFP64
Tube
Tape and reel
November 2006
Rev 3
1/70
www.st.com
70
1 page  
L6714
1
Block diagram
Figure 1. L6714 block diagram
Block diagram
SS_END / PGOOD
OSC / FAULT
SS_OSC / REF
HS1
HS1
LOGIC PWM
ADAPTIVE ANTI
CROSS CONDUCTION
CURRENT SHARING
CORRECTION
PWM1
HS2
LS2
LOGIC PWM
ADAPTIVE ANTI
CROSS CONDUCTION
CURRENT SHARING
CORRECTION
PWM2
HS3
LS3
LOGIC PWM
ADAPTIVE ANTI
CROSS CONDUCTION
CURRENT SHARING
CORRECTION
PWM3
HS4
LS4
LOGIC PWM
ADAPTIVE ANTI
CROSS CONDUCTION
CURRENT SHARING
CORRECTION
PWM4
VR_HOT
VR_FAN
TM
DIGITAL
SOFT START
VID0
VID1
VID2
VID3
VID4
VID5
VID6
VID7 / D-VID
VID_SEL
OUTEN
OUTEN
VCC
VCCDR
OUTEN
DAC/CS_SEL
ERROR
AMPLIFIER
PWM1
PWM2
PWM3
PWM4
L6714
CONTROL LOGIC
AND PROTECTIONS
OCP1
OCP2
OCP3
OCP4
OFFSET CS_SEL
TOTAL DELIVERED CURRENT
OVP
COMPARATOR
+150mV / 1.800V / OVP
64k
64k
1.240V
REMOTE
BUFFER
64k
64k
OVP
CS_SEL
CH1 CURRENT
READING
OCP1
CS_SEL
CH2 CURRENT
READING
OCP2
CS_SEL
CH3 CURRENT
READING
OCP3
CS_SEL
CH4 CURRENT
READING
DAC / CS_SEL
OCP4
VCC
CS1-
CS1+
CS2-
CS2+
CS3-
CS3+
CS4-
CS4+
SGND
5/70
5 Page 
L6714
Pin settings
Table 1. Pin functions
N° Pin
Function
SSEND - Intel Mode. Soft Start END Signal.
Open Drain Output set free after SS has finished and pulled low when triggering
any protection. Pull up to a voltage lower than 5V (typ), if not used it can be left
46
SS_END/ floating.
PGOOD PGOOD - AMD Mode.
Open Drain Output set free after SS has finished and pulled low when VSEN is
lower than the relative threshold. Pull up to a voltage lower than 5V (typ), if not
used it can be left floating.
Voltage Regulator HOT. Over Temperature Alarm Signal.
Open Drain Output, set free when TM overcomes the Alarm Threshold.
47 VR_HOT
Thermal Monitoring Output enabled if Vcc > UVLOVCC.
See “Thermal monitor” Section for details and typical connections.
Voltage Regulator FAN. Over Temperature Warning Signal.
Open Drain Output, set free when TM overcomes the Warning Threshold.
48 VR_FAN
Thermal Monitoring Output enabled if Vcc > UVLOVCC.
See “Thermal monitor” Section for details and typical connections.
Thermal Monitor Input.
49
TM
It senses the regulator temperature through apposite network and drives
VR_FAN and VR_HOT accordingly.Short TM pin to SGND if not used.
See “Thermal monitor” Section for details and typical connections.
50
SGND
All the internal references are referred to this pin. Connect to the PCB Signal
Ground.
Channel 4 LS Driver Supply.
51 VCCDR4 It must be connected to others VCCDRx pins.
LS Driver supply can range from 5Vbus up to 12Vbus, filter with 1µF MLCC cap
vs. PGND4.
52
LGATE4
Channel 4 LS Driver Output. A small series resistor helps in reducing device-
dissipated power.
53 PGND4 Channel 4 LS Driver return path. Connect to Power ground Plane.
54 PGND2 Channel 2 LS Driver return path. Connect to Power ground Plane.
55
LGATE2
Channel 2 LS Driver Output. A small series resistor helps in reducing device-
dissipated power.
Channel 2 LS Driver Supply.
56 VCCDR2 It must be connected to others VCCDRx pins.
LS Driver supply can range from 5Vbus up to 12Vbus, filter with 1µF MLCC cap
vs. PGND2.
Channel 3 LS Driver Supply.
57 VCCDR3 It must be connected to others VCCDRx pins.
LS Driver supply can range from 5Vbus up to 12Vbus, filter with 1µF MLCC cap
vs. PGND3.
58
LGATE3
Channel 3 LS Driver Output.A small series resistor helps in reducing device-
dissipated power.
59 PGND3 Channel 3 LS Driver return path. Connect to Power ground Plane.
11/70
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet L6714.PDF ] | |
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