AS3630 datasheet(24/72 Pages) AMSCO

24 / 72 page

AS3630 – 24

8A Supercap Flash Driver

• Shutdown: Setting mode_setting=”shutdown or external

torch mode (leave Supercap charged)” will keep the

Supercap charged and disables the balancing circuit.It can

be forced on if bal_force_on is set. If the voltage voltage

on VDCDC is above 5.35V, the Supercap will be discharged

until VDCDC is below 5.3V before shutdown mode is

entered.

• Shutdown and Discharge: Setting

mode_setting=”shutdown and discharge Supercap” will

slowly discharge the Supercap through RDIS_CHARGE6 .

• Pre-Charge after Charge or Flash: Setting

mode_setting=”pre charge Supercap (to VIN)” will

discharge the Supercap to approximately VVIN-0.3V by

using RDIS_CHARGE. Afterwards the Supercap is charged

to VVIN as shown in Figure 19.

Note: If the Supercap is charged above 5.5V it will be discharged

to 5.5V even if the mode is set to “shutdown or external torch

mode (leave Supercap charged)” to protect the Supercap.

If during pre-charge, transition or charging operation, the

junction temperature exceed TOVTEMP, the operation is

temporarily stopped and automatically resumes, when the

junction temperature has dropped below TOVTEMP-TOVTEMPHYST.

The Supercap balancing circuit keeps both parts of the

Supercap at the same voltage level - see Balancing Circuit - Pin

BAL.

6. Implemented by a resistor between VSUPERCAP and BAL and another resistor between BAL and GND.

AS3630 датащи(PDF) 24 Page - ams AG