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参数资料
| 型号： | L6714TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
| 封装： | 10 X 10 MM, LEAD FREE, TQFP-64 |
| 文件页数： | 48/70页 |
| 文件大小： | 694K |
| 代理商： | L6714TR |
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Over current protection
L6714
52/70
in this particular situation, the switching frequency for each phase results reduced. The ON
time is the maximum allowed TON(max) while the OFF time depends on the application:
Figure 20. Constant current
The trans-conductance resistor Rg can be designed considering that the device limits the
bottom of the inductor current ripple and also considering the additional current delivered
during the quasi-constant-current behavior as previously described in the worst case
conditions.
Moreover, when designing D-VID compatible systems, the additional current due to the
output filter charge during dynamic VID transitions must be considered.
where
T
OFF
L
I
PEAK
I
OCPx
–
V
OUT
------------------------------------
=
f
1
T
ON max
()
T
OFF
+
---------------------------------------------
=
VOUT
0.40 VIN
Constant Current (Exploded)
IOCP = 4 x IOCPx
(IDROOP = 140A)
IOUT
UVP Threshold
Resulting Out. Char.
IMAX,tot
Limted-TON Char.
Droop Effect
Quasi-Const.
Current
TON(max)
IOCPx
IMAX
IPEAK
LS ON Skipping
Clock Cycles
TSW
Rg
I
OCPx max
()
R
SENSE max
()
I
OCTH min
()
-----------------------------------------------------------------------
=
I
OCPx
I
OUT OCP
()
N
---------------------------
I
PP
2
------------
I
DVID
–
N
------------------
+
–
=
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|---|---|
| L6714 | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
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