- 您现在的位置：买卖IC网 > PDF目录97995 > L6711 (STMICROELECTRONICS) 2 A SWITCHING CONTROLLER, 178 kHz SWITCHING FREQ-MAX, PQFP48 PDF资料下载
参数资料
| 型号： | L6711 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, 178 kHz SWITCHING FREQ-MAX, PQFP48 |
| 封装： | 7 X 7 MM, 1 MM HEIGHT, TQFP-48 |
| 文件页数： | 29/50页 |
| 文件大小： | 679K |
| 代理商： | L6711 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页当前第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页
Obsolete
Product(s)
- Obsolete
Product(s)
L6711
Output voltage monitor and protections
35/50
14.5
Low side sense overcurrent (CS_SEL=OPEN)
The device detects an Over Current condition for each phase when the current information
IINFOx overcomes the fixed threshold of IOCTH (35A Typ). When this happens, the device
keeps the relative LS mosfet on, skipping clock cycles, until the threshold is crossed back
and IINFOx results being lower than the IOCTH threshold. This implies that the device limits
the bottom of each inductor current ripple.
After exiting the OC condition, the LS mosfet is turned off and the HS is turned on with a
duty cycle driven by the PWM comparator.
Keeping the LS on, skipping clock cycles, causes the on-time subsequent to the exit from
the OC condition to increase. Considering now that the device, with this kind of current
sense, has maximum on-time dependence with the delivered current given by the following
relationship:
Where IOUT is the output current (IOUT = ΣIPHASEx) and TSW is the switching period (TSW
=1/FSW).
This linear dependence has a value at zero load of 0.80 TSW and at maximum current of
0.40 TSW typical and results in two different over current behaviors of the device:
14.5.1
TON Limited output voltage.
This happens when the maximum ON time is reached before that the current in each phase
is able to regulate considering the TON limitation imposed by the previous relationship. If the
desired output characteristic crosses the TON limited maximum output voltage, the output
resulting voltage will start to drop after the crossing.
In this case, the device doesn't perform constant current limitation but only limits the
maximum ON time following the previous relationship. The output voltage starts to decrease
follows the resulting characteristic (dotted in Figure 17) until UVP is detected or anyway until
IDROOP =105A.
Figure 17.
TON limited operation
T
ON,MAX
0.80
I
D ROOP
–
3.8k
() T
SW =
0.80 T
SW
I
DROOP
0
A
=
0.40 T
SW
I
DROOP
105
A
=
=
0
.8
0
V
IN
0
.4
0
V
IN
V
O
U
T
IO
U
T
IO
C
P
=
3
IO
C
P
x
(ID
R
O
P
=
1
0
5
A
)
T
O
N
L
im
ite
dO
u
tp
u
t
c
h
a
ra
c
te
ris
tic
0
.8
0
V
IN
0
.4
0
V
IN
V
O
U
T
IO
U
T
IO
C
P
=
3
IO
C
P
x
(ID
R
O
P
=
1
0
5
A
)
D
e
s
ire
dO
u
tp
u
t
c
h
a
ra
c
te
ris
tica
n
d
U
V
P
th
re
s
h
o
ld
R
e
s
u
ltin
gO
u
tp
u
t
c
h
a
ra
c
te
ris
tic
Maximum output Voltage
b) TON Limited Output Voltage
相关PDF资料 |
PDF描述 |
|---|---|
| L6714TR | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
| L6714 | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
| L6725TR | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| L6728ATR | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
| L6728A | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6711_06 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3 Phase controller with dynamic VID and selectable DACs |
| L6711TR | 功能描述:DC/DC 开关控制器 3 PHASE CONTROLLER RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6712 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712_05 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712A | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
发布紧急采购，3分钟左右您将得到回复。