l6706 STMicroelectronics, l6706 Datasheet - Page 7

• Manufacturer Part Number: l6706
• Description: Vr11.1 Single Phase Controller With Integrated Driver
• Manufacturer: STMicroelectronics

L6706
Table 2.
N°
10
11
12
13
14
15
8
9
LTBGAIN
OFFSET
OVPSEL
SSOSC/
OCSET
FLIMIT
FAULT
Name
IMON
OSC/
LTB
Pin description (continued)
Load transient boost pin.
Internally fixed at 2 V, connecting a R
load transient boost technology™: as soon as the device detects a transient
load it turns on the PHASE. Short to SGND to disable the
transient boost technology” Section
Current monitor output pin.
A current proportional to the load current is sourced from this pin. Connect
through a resistor R
pin voltage is clamped to 1.1 V max.
Load transient boost technology™ gain pin.
Internally fixed at 1.24 V, connecting a R
setting the GAIN of the LTB action. See
Section
Offset programming pin.
Internally fixed at 1.240 V, connecting a R
setting a current that is mirrored into FB pin in order to program a positive offset
according to the selected R
See “Offset (optional)” Section
Over voltage programming pin.
Internally pulled up by 20 µA (min) to 3.3 V. Leave floating to use built-in
protection thresholds (OVP
R
voltage according to the R
OVP” Section
Over current setting, psi action pin.
Connect to SGND through a R
“Overcurrent protection” Section
Oscillator, fault pin.
It allows programming the switching frequency F
according to the resistor connected from the pin vs. SGND or VCC with a gain
of 10 kHz/µA (see relevant section for details). Leaving the pin floating
programs a switching frequency of 200 kHz. The pin is forced high (3.3 V typ) to
signal an OVP/UVP fault: to recover from this condition, cycle VCC or the
OUTEN pin.
Soft-start oscillator pin.
By connecting a resistor R
Soft-start time T
same slope implemented to reach V
reference moves from V
fixed 1.240 V.
maximum LTB frequency.
details.
OVP
resistor and filter with 100 pF (max) to set the OVP threshold to a fixed
for details.
Doc ID 15698 Rev 1
See “Oscillator” Section
See “Soft-start” Section
for details.
SS
will proportionally change with a gain of 25 [µs / kΩ]. The
MON
BOOT
to SGND (or FBG) to implement a load indicator. The
See “Load transient boost technology”
OVP
SS
TH
FB
Pins description and connection diagrams
= VID + 175 mV typ). Connect to SGND through a
to GND, it allows programming the soft-start time.
to the programmed VID code. The pin is kept to a
. Short to SGND to disable the function.
resistor.See “Over voltage and programmable
OCSET
for details.
for details.
Description
for details.
BOOT
LTB
for details.
resistor to set the OCP threshold.
for details. It also allows to select
See “Load transient boost technology”
LTBGAIN
- C
OFFSET
has to be considered also when the
LTB
vs. V
SW
resistor vs SGND allows
resistor vs. SGND allows
. Frequency is programmed
OUT
allows to enable the
function.See “Load
Sectionfor
See
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