DA9155M datasheet(29/38 Pages) RENESAS

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DA9155M

2.5 A Companion Charger for Rapid Charging

Datasheet

Revision 3.2

25-Feb-2022

CFR0011-120-00 Rev 5

29 of 37

11.3.5

Safety Timer

TIMER_A (0x00C)

Field

Slice

Description

TIMER_COUNT

7:0

Countdown value of the safety timer. Decremented at 1 s

intervals. Reading the register gives the current timer value.

Writing the register has no affect.

TIMER_B (0x00D)

Field

Slice

Description

TIMER_LOAD

7:0

Safety timer pre-load and re-load. Writing the register when

the buck is not enabled sets the pre-load value. The pre-load

value is automatically loaded in to TIMER_COUNT the next

time the buck is enabled. Writing the register during buck

operation loads the written value in to TIMER_COUNT.

TIMER_LOAD provides the time in seconds.

The minimum value is 0 s (0x00). The maximum value is

255 s (0xFF). The default is set to the maximum time (0xFF).

11.3.6

Buck Control

BUCK_CTRL (0x00E)

Field

Slice

Description

Reserved

7:1

BUCK_EN

0:0

Buck enable. The register is also set at the rising edge of the

EN pin and cleared at the falling edge.

BUCK_ILIM (0x00F)

Field

Slice

Description

Reserved

7:5

BUCK_ILIM

4:0

Peak current limit. BUCK_ILIM=(3000+N×100) mA

The maximum value is 5.5 A (0x19). Any value greater than

the maximum will be stored in the register but limited to the

maximum at the output

BUCK_IOUT (0x010)

Field

Slice

Description

BUCK_IOUT

7:0

Buck output current. IOUT=250+(N×10) mA

The minimum value is 400 mA (0x0F). The maximum value is

2.5 A (0xE1). Any value greater than the maximum will be

stored in the register but limited to the maximum at the output.

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