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L6730B データシート(PDF) 32 Page - STMicroelectronics

部品番号 L6730B
部品情報  Adjustable step-down controller with synchronous rectification
PDF  52 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6730B データシート(HTML) 32 Page - STMicroelectronics

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L6730 - L6730B
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Doc ID 11938 Rev 3
effectively turned-on and the regulation can be lost. Thanks to the “bootstrap anti-
discharging system” the bootstrap cap is always kept charged. The following picture shows
the behaviour of the device in the following conditions: 12 V -> 3.3 V@0 A.
It can be observed that between two pulses trains the low-side is turned-on in order to keep
the bootstrap cap charged.
Figure 27.
12 V -> 3.3 V@0 A in no-sink
Pulse train
Minimum Bootstrap Voltage
VPHASE
VBOOT
IL



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