MAX8662(2007) 查看數據表（PDF） - Maxim Integrated

零件编号

产品描述 (功能)

比赛名单

MAX8662
(Rev.:2007)

Power-Management ICs for Single-Cell, Li+ Battery-Operated Devices

Maxim Integrated 

Power-Management ICs for

Single-Cell, Li+ Battery-Operated Devices

PIN

MAX8662 MAX8663

1

1

2

2

3

—

4, 5

3, 4

6, 7

5, 6

8, 9

7, 8

10

—

11

9

12

10

13

11

14

12

15

13

16

—

17

14

18

15

Pin Description

NAME

FUNCTION

PEN1

PEN2

EN3

DC1,

DC2

Input Limiter-Control Input 1. Used with CEN and PEN2 to set the DC current limit to 95mA,

475mA, a resistor programmable level up to 2A, or to turn off the input limiter (see Table 1).

Input Limiter-Control Input 2. Used with CEN and PEN1 to set the DC current limit to 95mA,

475mA, a resistor programmable level up to 2A, or to turn off the input limiter (see Table 1).

Enable Input and PWM Dimming Input for Regulator 3 White LED Boost. Drive high to

enable. Drive low for more than 2ms to turn off. For PWM-controlled dimming, drive EN3

with a PWM switching input with a frequency of 1kHz to 100kHz.

DC Input Source. Connect to an AC adapter or USB source. DC1 and DC2 are internally

connected.

SYS1,

SYS2

System Supply Voltage. The SYS output supplies power to all regulators. With no external

power, SYS1 and SYS2 connect to BAT through an internal 40mΩ switch. When a valid

voltage is present at DC_, SYS_ connects to DC_ but is limited to 5.3V. SYS1 and SYS2 are

internally connected.

BAT1,

BAT2

Battery Connections. Connect to a single-cell Li+ battery. The battery is charged from SYS_

when a valid source is present at DC. BAT_ drives SYS_ when DC is not valid. BAT1 and

BAT2 are internally connected.

BRT

CHG

CEN

THM

ISET

CT

LED Analog Brightness Control Input. Connect BRT to a voltage from 50mV to 1.5V to set

ICS from 1mA to 30mA. Connect BRT to the center of a resistor-divider connected between

REF and GND to set a fixed brightness when analog dimming is not required.

Charger Status Output. CHG is an open-drain nMOS that pulls low when the charger is in

fast charge or prequalification modes. CHG goes high impedance when the charger is in

top-off mode or disabled.

Charger Enable Input. Drive CEN low to enable the charger when a valid source is

connected at DC. Drive CEN high to disable charging. Drive CEN high and PEN2 low to

enter USB suspend mode.

Thermistor Input. Connect a 10kΩ negative temperature coefficient (NTC) thermistor from

THM to GND. Charging is suspended when the temperature is beyond the hot or cold

limits. Connect THM to GND to disable the thermistor functionality.

Charge Rate-Set Input. Connect a resistor from ISET to GND to set the fast-charge current

from 300mA to 1.25A. The prequalification charge current and top-off threshold are set to

10% and 7.5% of fast-charge current, respectively.

Charge Timer-Programming Pin. Connect a capacitor from CT to GND to set the length of

time required to trigger a fault condition in fast-charge or prequalification mode and to

determine the time the charger remains in top-off mode. Connect CT to GND to disable

timers.

REF

GND

OUT4

Reference Voltage. Provides 1.5V output when EN3 is high. An internal discharge

resistance pulls REF to 0V when EN3 is low.

Ground. Low-noise ground connection.

Linear Regulator 4 Output. Delivers up to 500mA at an output voltage determined by SL1

and SL2. Connect a 4.7µF ceramic capacitor from OUT4 to GND. Increase the value to

10µF if VOUT4 < 1.5V.

18 ______________________________________________________________________________________

Share Link: