參數(shù)資料
型號(hào)： L6701TR
廠商： STMICROELECTRONICS
元件分類(lèi)： 穩(wěn)壓器
英文描述： 1.5 A SWITCHING REGULATOR, 110 kHz SWITCHING FREQ-MAX, PDSO36
封裝： LEAD FREE, SSO-36
文件頁(yè)數(shù)： 18/44頁(yè)
文件大小： 627K
代理商： L6701TR
Obsolete
Product(s)
- Obsolete
Product(s)
L6701
10 Output Voltage Positioning
25/44
10.5
Maximum Duty Cycle limitation
To provide proper time for current-reading in order to equalize the current carried by each
phase, the device implements a duty-cycle limitation. This limitation is not fixed but it is linearly
variable with the current delivered to the load as follow:
Duty Cycle limitation is variable with the delivered current to provide fast load transient
response at light load as well as assuring robust over-current protection.
Figure 10 shows the maximum output voltage that the device is able to regulate considering the
TON limitation imposed by the previous relationship. If the desired output characteristic crosses
the limited-TON maximum output voltage, the output resulting voltage will start to drop after the
cross-point. In this case, the output voltage starts to decrease following the resulting
characteristic (dotted in Figure 10) until UVP is detected or anyway until IISENx = 35A.
Figure 10. Maximum Duty Cycle limitation
T
ON max
()
0.80 T
SW
I
ISENx
0
A
=
0.40 T
SW
I
ISENx
35
A
=
=
VOUT
0.40 VIN
Maximum Output Voltage
0.80 VIN
IOCP = 3 x IOCPx
(IISENx = 35A)
IOUT
VOUT
0.40 VIN
Limited TON
0.80 VIN
IOCP = 3 x IOCPx
(IISENx = 35A)
IOUT
Desired output Char.
UVP Threshold
Resulting Output Char.
Limted-TON Output Char.
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PDF描述
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