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L6730 Datasheet(PDF) 26 Page - STMicroelectronics

Part # L6730
Description  Adjustable step-down controller with synchronous rectification
PDF  52 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6730 Datasheet(HTML) 26 Page - STMicroelectronics

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Device description
L6730 - L6730B
26/52
Doc ID 11938 Rev 3
If the current is higher than the valley OCP threshold during the off-time, the high-side
MOSFET(s) will not be turned ON. In this way the maximum current can be limited
(Figure 22).
During the constant-current-protection if the Vout becomes lower than 80% of the
programmed value an UV (under-voltage) is detected and the device enters in HICCUP
mode. The under-voltage-lock-out (UVLO) is adjustable by the multifunction pin (see
Chapter 5.10 on page 27). It’s possible to set two different thresholds:
●
4.2 V for 5 V bus
●
8.6 V for 12 V bus
Figure 20.
Peak overcurrent-protection in constant-current-protection (L6730B)
Figure 21.
Peak OCP in case of heavy overcurrent (L6730B)
VOUT
TON
IOUT
IL
Peak th
VOUT
IL
IOUT



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