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AS1346-49

Datasheet - Detailed Description

Figure 18. Typical Application Diagram with Adjustable Battery Monitoring

8.5 Thermal Shutdown

Due to its high-efficiency design, the AS1346 will not dissipate much heat in most applications. However, in applications where the AS1346 is

running at high ambient temperature, uses a low supply voltage, and runs with high duty cycles (such as in dropout) the heat dissipated may

exceed the maximum junction temperature of the device.

As soon as the junction temperature reaches approximately 150ºC the AS1346 goes in thermal shutdown. In this mode the internal PMOS &

NMOS switch are turned off. The device will power up again, as soon as the temperature falls below +140ºC again.

R3

R1

R2

AS1346

4.5V to 5.5V

3.3V 1200mA

SW1

1.8V 500mA

FB1

FB2

SW2

AGND

EN2

PVIN

VDD

EN1

LBI

LBO

L1 = 3.3μH

L2 = 3.3μH

PVIN

PGND