AAT4620 Ver la hoja de datos (PDF) - Advanced Analogic Technologies

Número de pieza

componentes Descripción

Lista de partido

AAT4620

PCMCIA Current Limit Interface and Capacitor Charger

Advanced Analogic Technologies 

AAT4620

PCMCIA Current Limit Interface

and Capacitor Charger

Pin Descriptions

Pin #

1

2

3

4, 5, 6

7, 8

9

10

11

12

Symbol

EN IU

EN IL

GND

VCC

OUT

ISETL

ISETU

RHYS

RDY

Function

Enable input. Active low enable with internal pull up. Also switches in the higher current limit

to allow the System to start functioning. Can be directly connected to System Ready for

automatic enabling. When both EN IL and EN IU are enabled, ISETU will be selected.

Enable input. Active low enable with internal pull up. Also switches in the lower current limit

initiating the super capacitor to start charging.

Device ground connection.

Input pins to the P-channel MOSFET source. Connect 1µF capacitor from VCC to GND.

P-channel MOSFET drain connection. Connect to super capacitor from OUT to GND.

Lower current-limit set input. A resistor from ISETL to ground sets the maximum lower cur-

rent limit for the switch. Current limit can be set between 100mA and 1200mA.

Upper current limit set input. A resistor from ISETU to ground sets the maximum upper cur-

rent limit for the switch. Current limits can be set between 100mA and 1200mA. Connect to

ground to disable current limit.

System READY hysteresis. Connect a resistor to ground to set the System Ready com-

parator hysteresis.

System ready pin. Open drain, active low, initiated when the capacitor is 98% charged.

Pin Configuration

TSOPJW-12

(Top View)

EN IU 1

EN IL 2

GND 3

VCC 4

VCC 5

VCC 6

12 RDY

11 RHYS

10 ISETU

9 ISETL

8 OUT

7 OUT

2

4620.2007.04.1.1

Share Link: