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| 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： | 53/70页 |
| 文件大小： | 694K |
| 代理商： | L6714TR |
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L6714
System control loop compensation
57/70
21
System control loop compensation
The control loop is composed by the Current Sharing control loop (See Figure 8) and the
Average Current Mode control loop. Each loop gives, with a proper gain, the correction to
the PWM in order to minimize the error in its regulation: the Current Sharing control loop
equalize the currents in the inductors while the Average Current Mode control loop fixes the
output voltage equal to the reference programmed by VID. Figure 22 shows the block
diagram of the system control loop.
by the DROOP pin flows into RFB implementing the dependence of the output voltage from
the read current.
Figure 22. Main control loop
The system can be modeled with an equivalent single phase converter which only difference
is the equivalent inductor L/N (where each phase has an L inductor).The Control Loop gain
results (obtained opening the loop after the COMP pin):
L3
L2
L1
PWM3
PWM2
PWM1
4 / 5
VREF
ERROR AMPLIFIER
COMP
FB
ZF(s)
ZFB(s)
DROOP
IDROOP
COUT
ROUT
1 / 5
CURRENT SHARING
DUTY CYCLE
CORRECTION
IINFO1
IINFO3
IINFO2
L4
PWM4
1 / 5
IINFO4
G
LOOP s
()
PWM
Z
F s
()
R
DROOP
Z
P s
()
+
()
Z
P s
() Z
L s
()
+
[]
Z
F s
()
As
()
--------------
1
As
()
------------
+
R
FB
+
-------------------------------------------------------------------------------------------------------------------------
–
=
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| L6717 | 制造商:STMicroelectronics 功能描述:High-Efficiency Hybrid AM2r2 Controller 48-Pin VFQFPN Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
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| L6717ATR | 制造商:STMicroelectronics 功能描述:CPU Power Supply Controller T/R 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Tape and Reel 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
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