1.2MHz, Low-Cost,

High-Performance Chargers

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9

Pin Description

PIN

NAME

FUNCTION

1

DCIN

Charger Bias Supply Input. Bypass DCIN with a 1μF capacitor to PGND.

2

AGND

Analog Ground

3

CSIP

Output Current-Sense Positive Input. Connect a current-sense resistor from CSIP to CSIN.

4

CSIN

Output Current-Sense Negative Input

5

IINP

Input Current-Monitor Output. IINP sources the current proportional to the current sensed across

CSSP and CSSN. The transconductance from (CSSP - CSSN) to IINP is 2.8μA/mV. See the Analog

Input Current-Monitor Output section to configure the current monitor for a particular gain setting.

6

BATT/FB

Battery Voltage Feedback Input. For the MAX17015B, connect a resistor voltage-divider from the

battery output to FB (see Figure 1).

7

ACOK

Connect a 10k

pullup resistor from LDO to

ACOK.

8

CSSP

Input Current Sense for Positive Input. Connect a current-sense resistor from CSSP to CSSN.

9

CSSN

Input Current-Sense Negative Input

10

ISET

Dual Mode™ Input for Setting Maximum Charge Current. ISET can be configured either with a

resistor voltage-divider or with a PWM signal from 128Hz to 500kHz. If there is no clock edge

within 20ms, ISET defaults to analog input mode. Pull ISET to AGND to shut down the charger. In

the MAX17015B, when the adapter is absent, drive ISET above 1V to enable IINP during battery

discharge. When the adapter is reinserted, ISET must be released to the correct control level within

300ms.

11

PGND

Power Ground Connection for MOSFET Drivers

12

DLO

Low-Side Power-MOSFET Driver Output. Connect to low-side n-channel MOSFET gate.

13

LDO

Linear-Regulator Output. LDO provides the power to the MOSFET drivers. LDO is the output of the 5.4V

linear regulator supplied from DCIN. Bypass LDO with a 4.7μF ceramic capacitor from LDO to PGND.

14

BST

High-Side Driver Supply. Connect a 0.68μF capacitor from BST to LX.

15

DHI

High-Side Power-MOSFET Driver Output. Connect to high-side n-channel MOSFET gate.

16

LX

High-Side Driver Source Connection. Connect a 0.68μF capacitor from BST to LX.

17

ACIN

AC Adapter Detect Input. ACIN is the input to an uncommitted comparator.

18

19

CC

Voltage Regulation Loop-Compensation Point. Connect a 0.01μF capacitor from CC to AGND.

20

VCTL

Battery Voltage Adjust Input. VCTL sets the number of cells and adjusts the voltage per cell. The

adjustment range is 4.2V to 4.4V per cell. See the Setting Charge Voltage section.

—

BP

Backside Paddle. Connect the backside paddle to analog ground.

Dual Mode is a trademark of Maxim Integrated Products, Inc.