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TPIC2603NE 数据表(PDF) 9 Page - Texas Instruments

部件名 TPIC2603NE
功能描述  6-CHANNEL SERIAL INTERFACE LOW-SIDE DRIVER
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

TPIC2603NE 数据表(HTML) 9 Page - Texas Instruments

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TPIC2603
6-CHANNEL SERIAL INTERFACE LOW-SIDE DRIVER
SLIS056A – FEBRUARY 1995 – REVISED MARCH 1996
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
fault sense/protection circuitry
over-current/short-to-battery sensing and protection
The internal fault protection circuitry of the TPIC2603 monitors the drain current for each channel. Each channel
offers two levels of protection from over-current conditions. The first level is a current-limit protection which
through the internal FET prevents the switching current from exceeding the on-state current limit. The second
level of protection transits the output to a low duty cycle PWM mode when the current exceeds the over-current
sense threshold. The PWM mode protection is enabled approximately 70
µs after the output has been turned
on. The output remains in the PWM mode until the shorted-load condition has been corrected and then
automatically returns to normal operation. Figure 5 illustrates device operation under an over-current or
shorted-load condition.
t(stb)
t(stb)
Glitches
Glitches
tw(sense)
tcyc(ref)
DRAIN
Control
Register
DRAIN
Fault
Register
NORMAL
SHORTED-LOAD
Control
Register
DRAIN
Fault
Register
Figure 5. Shorted-Load Condition


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