LTC1759 データシートの表示（PDF） - Linear Technology

部品番号

コンポーネント説明

メーカー

LTC1759

Smart Battery Charger

Linear Technology 

U

OPERATIO

LTC1759

FUNCTION

FIELD

TERMINATE_

DISCHARGE_ALARM

Reserved

REMAINING_

CAPACITY_ALARM

REMAINING_TIME_

ALARM

INITIALIZED

DISCHARGING

FULLY_CHARGED

FULLY_DISHARGED

ERROR

LTCVersionFunction

()

LTC_VERSION

WORD BIT

MAPPING

11

10

9

8

7

6

5

4

3:0

15:0

POWER-ON

RESET VALUE

(BINARY)

0

–

–

–

–

–

–

–

–

0101hex

ALLOWED VALUES

• This Bit May Be Used to Signal That the Charger May Be Restarted

After a Battery Conditioning Cycle Has Been Completed

• Write Only. Read Will NACK

• Writing a 0 to This Bit Will Be Ignored

• Not Supported by LTC1759

• Not Supported by LTC1759

• Write Only. Read Will NACK

• Intended for Host

• Not Supported by LTC1759

• Write Only. Read Will NACK

• Intended for Host

• Not Supported by LTC1759

• Write Only. Read Will NACK

• Intended for Host

• Not Supported by LTC1759

• Write Only. Read Will NACK

• Intended for Host

• Not Supported by LTC1759

• Write Only. Read Will NACK

• Intended for Host

• Not Supported by LTC1759

• Write Only. Read Will NACK

• Intended for Host

• Not Supported by LTC1759

• Write Only. Read Will NACK

• Intended for Host

• All Bits Set High Prior to AlarmWarning() Transmission

• Not Supported by LTC1759

• Write Only. Read Will NACK

• Returns LTC Version Number

• Read Only

• Always Returns 0101hex

SMBus Accelerator Pull-Ups

Both SCL and SDA have SMBus accelerator circuits which

reduce the rise time on systems with significant capaci-

tance on the two SMBus signals. The dynamic pull-up

circuitry detects a rising edge on SDA or SCL and applies

2mA to 5mA pull-up to VDD for approximately 1µs (exter-

nal pull-up resistors are still required to supply DC cur-

rent). This action allows the bus to meet SMBus rise time

requirements with as much as 150pF on each SMBus

signal. The improved rise time will benefit all of the devices

which use the SMBus, especially those devices that use

the I2C logic levels. Note that the dynamic pull-up circuits

only pull to VDD, so some SMBus devices that are not

compliant to the SMBus specifications may still have rise

time compliance problems if the SMBus pull-up resistors

are terminated with voltages higher than VDD.

15

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