DC Charging Mode

The MAX8804V/MAX8804W/MAX8804Y/MAX8804Z

automatically select between either a USB or AC

adapter input source. Drive SET low or leave it uncon-

nected to enable DC charging mode. Subsequent

pulses on SET program the charging current and the

top-off threshold. There are seven fast-charge current

options and four top-off threshold options. Pulse SET

high (1µs to 1ms pulse width) subsequently to realize

charging current and top-off threshold programming and

transition. After the 28th pulse, the MAX8804V/

MAX8804W/MAX8804Y/MAX8804Z return to the default

mode and start a new cycle. See Tables 2, 3, and 4 to

set the desired charging current and top-off threshold.

Drive SET high longer than 2ms to disable DC charging

control circuitry.

USB Charging Mode

Drive SET high to enable USB charging mode when the

USB input is valid. Subsequent low pulses with 1µs to

1ms pulse width on SET program the fast-charging cur-

rent from 95mA, 380mA, to 475mA for the MAX8804Y/

MAX8804Z, and from 380mA, 475mA, to 95mA for the

MAX8804V/MAX8804W, and then repeat a new cycle

as shown in Tables 5 and 6. Drive SET low or leave it

unconnected longer than 2ms to disable USB charging

control circuitry.

MAX8804Z Evaluation Kit

4

_______________________________________________________________________________________

PULSE

NUMBER

DEFAULT

1st

2nd

3rd

4th

5th

6th

7th

8th

9th

10th

11th

12th

13th

14th

450

450

450

450

550

550

550

550

500

500

500

500

400

400

400

Top-Off Current

Threshold (mA)

120

140

180

200

120

140

180

200

120

140

180

200

120

140

180

PULSE

NUMBER

—

15th

16th

17th

18th

19th

20th

21st

22nd

23rd

24th

25th

26th

27th

28th

—

400

600

600

600

600

650

650

650

650

700

700

700

700

450

Top-Off Current

Threshold (mA)

—

200

120

140

180

200

120

140

180

200

120

140

180

200

120

Table 4. MAX8804V DC Charging Current Programming by Series Pulses

PULSE

NUMBER

DEFAULT

1st

2nd

3rd

4th

5th

6th

7th

8th

9th

10th

11th

12th

13th

14th

450

450

450

450

550

550

550

550

500

500

500

500

400

400

400

Top-Off Current

Threshold (mA)

80

90

100

70

80

90

100

70

80

90

100

70

80

90

100

PULSE

NUMBER

—

15th

16th

17th

18th

19th

20th

21st

22nd

23rd

24th

25th

26th

27th

28th

—

400

600

600

600

600

650

650

650

650

700

700

700

700

450

Top-Off Current

Threshold (mA)

—

70

80

90

100

70

80

90

100

70

80

90

100

70

80

Table 3. MAX8804W DC Charging Current Programming by Series Pulses