4010CFE Ver la hoja de datos (PDF) - Linear Technology

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componentes Descripción

Fabricante

4010CFE

High Efficiency Standalone Nickel Battery Charger

Linear Technology 

Block Diagram

FAULT

1

CHRG

2

4 GND

CHEM

3

VTEMP

5

VCELL

6

THERMISTOR

INTERFACE

A/D

CONVERTER

BATTERY

DETECTOR

TIMER

8

7 VCDIV

CHARGE

TIMER

VOLTAGE

REFERENCE

CHARGER

STATE

CONTROL

LOGIC

LTC4010

UVLO AND

SHUTDOWN

PWM

READY

16

VCC

15

TGATE

14

BGATE

12

PGND

13

SENSE

9

BAT

10

VOLTAGE

REGULATOR

INTVDD

11

INTERNAL

VOLTAGE

REGULATOR

4010 BD

Operation (Refer to Figure 1)

NO DC ADAPTER

SHUTDOWN

DC ADAPTER PRESENT

NO BATTERY

OR

VCC < 4.25V

TOP-OFF

CHARGE**

(C/10)

CHARGE

QUALIFICATION

VCELL > 350mV, ADEQUATE VCC,

CHARGER ENABLED AND

TEMPERATURE OK (OPTIONAL)

CHECK

BATTERY

VCELL > 900mV

NiMH

∆T/∆t

FAST CHARGE**

(1C)

VCELL < 900mV

VCELL > 900mV

PRECHARGE**

(C/5 FOR

tMAX/12)

VCELL < 900mV

VCELL < 1.22V AT tMAX*/12

OR TIME = tMAX

FAULT

tMAX/3

NiCd OR

NiMH – ∆V

AUTOMATIC

RECHARGE

VCELL < 1.325V

VCELL > 1.95V

OR PWM FAULTS

4010 F01

*tMAX IS PROGRAMMED MAXIMUM FAST CHARGE DURATION

**OPTIONAL TEMPERATURE LIMITS APPLY

Figure 1. LTC4010 State Diagram

4010fb



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