L6712ADTR 데이터 시트보기 (PDF) - STMicroelectronics
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L6712ADTR Datasheet PDF : 29 Pages
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L6712A L6712
Table 6. Pin Function (continued)
N. (*)
SO VFQFPN
Name
Description
20 to 22 22 to 24
VID0-2
Voltage IDentification pins. These input are internally pulled-up. They are used to
program the output voltage as specified in Table 1 and to set the PGOOD, OVP
and UVP thresholds.
Connect to GND to program a ‘0’ while leave floating to program a ‘1’.
23
25
PGOOD This pin is an open collector output and is pulled low if the output voltage is not
within the above specified thresholds and during soft-start.
It cannot be pulled up above 5V. If not used may be left floating.
24
27
BOOT2 Channel 2 HS driver supply. This pin supplies the relative high side driver.
Connect through a capacitor (100nF typ.) to the PHASE2 pin and through a diode
to VCC (cathode vs. boot).
25
28
UGATE2 Channel 2 HS driver output.
A little series resistor helps in reducing device-dissipated power.
26
29
PHASE2 Channel 2 HS driver return path. It must be connected to the HS2 mosfet source
and provides the return path for the HS driver of channel 2.
27
30
LGATE2 Channel 2 LS driver output.
A little series resistor helps in reducing device-dissipated power.
28
31,
PGND LS drivers return path.
32
This pin is common to both sections and it must be connected through the
closest path to the LS mosfets source pins in order to reduce the noise injection
into the device.
PAD THERMAL Thermal pad connects the silicon substrate and makes a good thermal contact
PAD
with the PCB to dissipate the power necessary to drive the external
mosfets.Connect to the GND plane with several vias to improve thermal
conductivity.
(*) Pin not reported in QFN column have to be considered as Not Connected, not internally bonded.
Figure 4. Reference Schematic
Vin
GNDin
C
IN
VCCDR
VCC
L1
S2
S1
S0
BOOT1
HS1
UGATE1
PHASE1
BOOT2
UGATE2
HS2
PHASE2
LS1
LGATE1
LGATE2
LS2
ISEN1
Rg
PGNDS1
Rg
VID2
VID1
VID0
REF_IN/OUT
OSC / INH
SGND
L6712
L6712A
ISEN2
Rg
PGNDS2
PGND Rg
PGOOD
COMP
C
F
DROOP
R
F
FB
R
FB
VSEN
FBR
FBG
L2
C
OUT
LOAD
PGOOD
7/29
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