MC33349N-4R1 Просмотр технического описания (PDF) - ON Semiconductor

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MC33349N-4R1

Lithium Battery Protection Circuit for One Cell Battery Packs

ON Semiconductor 

MC33349

enabled, DO can turn off the discharge control FET. Its delay

time would be approximately 5 µs.

The P– pin has a built–in pull down resistor, typically 100

Wk , which connects to the Gnd pin. Once an excess current

or short circuit fault is removed, the internal resistor pulls

V(P–) to the Gnd pin potential. Therefore, the voltage from

P– to Gnd drops below the current detection thresholds and

DO turns the external MOSFET back on.

–NOTE–

If VDD voltage is higher than the over–discharge voltage

threshold, VDET2, when excess current is detected the IC

will not enter a standby mode. However, if VDD is below

VDET2 when excess current is detected, the IC will enter a

standby mode. This will not occur when the short circuit

detector activates.

Figure 22. Timing Diagram / Operational Description

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