L6706TR STMicroelectronics, L6706TR Datasheet - Page 38
L6706TR
Manufacturer Part Number
L6706TR
Description
IC CTLR SGL PHASE VR11.1 40VFQFP
Manufacturer
STMicroelectronics
Datasheet
1.L6706TR.pdf
(47 pages)
Specifications of L6706TR
Applications
Controller, Intel VR11.1
Voltage - Input
3.7 ~ 12 V
Number Of Outputs
1
Voltage - Output
0.03 ~ 1.6 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
40-VFQFN, 40-VFQFPN
Output Current
2 A
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
497-8975-2
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Oscillator
16
38/47
F
SW
F
SW
=
=
200 kHz
200 kHz
(
Oscillator
The internal oscillator generates the triangular waveform for the PWM charging and
discharging with a constant current an internal capacitor. The current delivered to the
oscillator is typically 25 μA (corresponding to the free running frequency F
and it may be varied using an external resistor (R
pin and SGND or VCC (or a fixed voltage greater than 1.24 V). Since the OSC/FAULT pin is
fixed at 1.240 V, the frequency is varied proportionally to the current sunk (forced) from (into)
the pin considering the internal gain of 10 kHz/μA.
In particular connecting R
pin), while connecting R
the pin), according the following relationships:
R
R
Maximum programmable switching frequency must be limited to 1 MHz to avoid minimum
Ton limitation. Anyway, device power dissipation must be checked prior to design high
switching frequency systems.
Figure 22. R
(
OSC
OSC
)
vs. SGND
vs. +12V
–
)
12V 1.240V
----------------------------------- - 9.1 kHz
+
R
--------------------------- - 9.1
R
OSC
1.240V
OSC
–
(
(
kΩ
OSC
kΩ
)
)
⋅
vs. switching frequency
⋅
kHz
---------- -
μA
---------- -
μA
OSC
OSC
=
=
to VCC = 12 V the frequency is reduced (current is forced into
200 kHz
200 kHz
to SGND the frequency is increased (current is sunk from the
Doc ID 15698 Rev 2
(
(
)
) 9.7916 10
+
–
------------------------------- -
11.284 10
------------------------------- -
R
R
OSC
OSC
(
(
⋅
kΩ
⋅
kΩ
OSC
)
)
4
3
⇒
⇒
) connected between the OSC/FAULT
R
R
OSC
OSC
(
(
kΩ
kΩ
)
)
=
=
----------------------------------------------------------- -
200 kHz
----------------------------------------------------------- -
F
SW
(
(
9.7916 10
11.284 10
kHz
SW
) F
) 200 kHz
–
–
= 200 kHz)
⋅
⋅
SW
4
3
(
(
kHz
L6706
)
)
[
[
kΩ
kΩ
]
]