参数资料
型号: L6726ATR
厂商: STMICROELECTRONICS
元件分类: 稳压器
英文描述: 1.5 A SWITCHING CONTROLLER, 297 kHz SWITCHING FREQ-MAX, PDSO8
封装: SOP-8
文件页数: 6/35页
文件大小: 986K
代理商: L6726ATR
Protections
L6726A
14/35
Doc ID 12754 Rev 4
Figure 6.
OC threshold setting procedure timings (top) and waveforms (bottom)
7.3
Undervoltage lock out
In order to avoid anomalous behaviors of the device when the supply voltage is too low to
support its internal rails, UVLO is provided: the device will start up when VCC reaches
UVLO upper threshold and will shutdown when VCC drops below UVLO lower threshold.
The 4.1 V maximum UVLO upper threshold allows L6726A to be supplied from 5 V and 12 V
busses in or-ing diode configuration.
Figure 7.
OCP trip, default threshold, LS: STD38NH02L (left) UVLO turn off (right)
VCC
Enable Th
COMP
700mV
LGATE
PWM ramp
bottom edge
UVLO Th
R
OCSET not connected
Setting Procedure
VCC
Enable Th
COMP
700mV
LGATE
PWM ramp
bottom edge
UVLO Th
5.5ms - 6.5ms
R
OCSET connected
Setting Procedure
t
DELAY
t
DELAY
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