ACT8847 datasheet(39/42 Pages) ACTIVE-SEMI

39 / 42 page

ACT8847

Rev 9, 27-June-17

Innovative PowerTM

- 39 -

www.active-semi.com

ActivePMUTM is a trademark of Active-Semi.

I2CTM is a trademark of NXP.

Hardware Configuration

The following hardware connections are required to achieve the specified startup sequencing.

Connect a 2.2uF capacitor between GPIO1 and GPIO2

Connect a 1Mohm resistor from GPIO2 to GA.

Connect a 51kohm resistor between GPIO3 and nPBIN.

Connect a 10kohm resistor between REG7 and PWRHLD.

Startup

The ACT8847QM102-T has three startup sequences.

REG13. When power is applied to the IC. REG13 automatically turns on when input power is applied

and the input voltage is above UVLO.

REG7/1/4/2/5. REG7/1/4/2/5 turn on when GPIO1 is pulled high. REG7/1/4/2/5 are latched on after

REG7 goes into regulation and pulls PWRHLD high. GPIO1 may remain high or return to a logic low

after this time. REG7/1/4/2/5 stay on in either case.

REG3. The enable input for REG3 is the AND of PWRHLD and PWREN. Note that PWRHLD should be

connected to REG7. REG3 is intended to be turned on after REG7/1/4/2/5 are in regulation. Once

REG7/1/4/2/5 are in regulation and PWRHLD is high, REG3 can be independently enabled and

disabled with PWREN.

ACT8847 Datasheet(PDF) 39 Page - Active-Semi, Inc