ISL6251, ISL6251A

FN9202 Rev 3.00

Page 10 of 20

March 13, 2014

FIGURE 12. ISL6251, ISL6251A TYPICAL APPLICATION CIRCUIT WITH FIXED CHARGING PARAMETERS

CSIP

CSIN

BOOT

UGATE

PHASE

LGATE

PGND

CSOP

CSON

CELLS

ICM

GND

DCIN

ACSET

VDDP

VDD

ACPRN

ICOMP

VCOMP

VADJ

EN

CHLIM

ACLIM

VREF

Q1

Q2

L

10µH

C1

10µF

SYSTEM LOAD

C10

10µF

R1

40m



AC ADAPTER

R2

20m



R3

18



R4

2.2



R6:10k

R5

100k

R8

130k

1%

R9

10.2k

1%

C2

0.1µF

C4

0.1µF

C3

1µF

C5:10nF

C6:6.8nF

C9

1µF

ISL6251

ISL6251A

FLOATING

4.2V/CELL

R10

4.7



C7

1µF

3.3V

Battery

Pack

BAT+

BAT-

VDD

4 CELLS

D1

Optional

D2

VDDP

VREF

R12

20k 1%

R11

130k

1%

R13

1.87k

1%

2.6A CHARGE LIMIT

253mA Trickle Charge

C11

3300pF

Q3

Trickle Charge

D4

To Host

Controller

CHARGE

ENABLE

CSIP

CSIN

BOOT

UGATE

PHASE

LGATE

PGND

CSOP

CSON

CELLS

ICM

GND

DCIN

ACSET

VDDP

VDD

ACPRN

ICOMP

VCOMP

VADJ

EN

CHLIM

ACLIM

VREF

Q1

C8

0.1µF

ISL6251,

ISL6251A

FLOATING

4.2V/CELL

C7

D3

R7: 100



CHARGE

ENABLE