TPS61251DSGR 和TPS61252DSGR有什么区别,两颗料可以替换吗？

TPS61251DSGR 和TPS61252DSGR有什么区别,两颗料可以替换吗?

Andy,

   TPS61251与TPS61252的区别如下，具体请查看附件。可替代。

1.TPS61251 is optimized for charging bulk capacitors

2.TPS61252 is a regular boost converter.

3.TPS61252 current accuracy is 20% vs 10% from TPS61251

4.Snooze Mode only available with TPS61251

5. Power Good function is different for both devices:

TPS61251

PG is set high if the feedback voltage reaches 95% of its nominal value.

The PG comparator operates even in shut down mode when EN is set to low and/or VIN is turned off. This guaranties power good functionality until the capacitor is discharged.

The PG output goes low when:

Vout < 2.3 V and indicates the discharge of the capacitor.

Vout < 2.0 V all internal circuitry is disabled. Therefore the PG open drain output becomes high resistive and    follows the voltage the pull-up resistor is connected to.

While the output capacitors are still charged the converter can be disconnected from its supply but it will still supply a follow-on circuitry with energy needed for a secured shut down.