TA8063F 데이터 시트보기 (PDF) - Toshiba
부품명
상세내역
제조사
TA8063F Datasheet PDF : 10 Pages
| |||
TA8063F
3. Overcurrent protection (ISD)
• Outline
When the output current is less than the ISD detection current, output is controlled by input signals. When
the output current is greater than the detection current, output changes to switching waveform as in Figure
1.
Figure1 Switching Waveforms
• Operation
The output current is detected by monitoring the sense resistance. Detection circuits are connected to the
self-diagnosis output pins ( DG1 and DG2 ), then further connected to the short circuit protection circuits.
When current exceeding the ISD detection current flows to one of the two channels of self-diagnosis output,
the corresponding short circuit protection circuit is activated. The short circuit protection circuit is built into
the timer. If overcurrent mode continues 10μs (Typ.), the circuit changes the output to high impedance mode,
then returns to on mode after 290μs (Typ.). The above switching waveform is output repeatedly as long as
the circuit is in overcurrent mode.
• Caution for application
The overcurrent protection is used to protect the IC from instantaneous destruction due to short circuits. If
overcurrent continues, configure a system which changes the IC to standby mode using the self diagnosis
signal.
Note that the time required for switching the IC from output short (overcurrent detection) to standby must
be 1s or less.
5
2002-02-27
Share Link: 