Datasheet

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LTC1759

OPERATIO

Table 1: Supported Charger Functions

SMBus ADDRESS COMMAND CODE

FUNCTION (7-BIT) (8-BIT hex) ACCESS DATA TYPE

ChargerSpecInfo() b0001_001 h11 r Register

ChargerMode() b0001_001 h12 w Register

ChargerStatus() b0001_001 h13 r Register

ChargingCurrent() b0001_001 h14 w Register

ChargingVoltage() b0001_001 h15 w Register

AlarmWarning() b0001_001 h16 w Control

LTCVersionFunction() b0001_001 h3c r Register

OptionalMfgFunction3() b0001_001 h3d – Not Supported

OptionalMfgFunction2() b0001_001 h3e – Not Supported

OptionalMfgFunction1() b0001_001 h3f – Not Supported

Alert Response Address

b0001_100 N/A Read Byte Interrupt Address

Read-byte format. 89h is returned as the interrupt address of the LTC1759. Rev 1.0 SMBus Compliant.

Table 2: SMBus Word Bit Definitions for All Allowed LTC1759 Functions

POWER-ON

WORD BIT RESET VALUE

FUNCTION FIELD MAPPING (BINARY) ALLOWED VALUES

ChargerSpecInfo CHARGER_SPEC 3:0 0001 • The CHARGER_SPEC Reports the Version of the Smart Battery

Charger Specification the Charger Supports

• 0001 – Version 1.0

• All Other Codes Reserved

• Always Returns 0001

• Read Only. Write Will NACK

SELECTOR_SUPPORT 4 0 • 0 – Charger Does Not Support the Optional Smart Battery Selector

Commands

• 1 – Charger Supports the Optional Smart Battery Selector

Commands

• Always Returns 0

• Read Only. Write Will NACK

Reserved 15:5 0 • These Bits Are Reserved and Must Return Zero

• Read Only. Write Will NACK

ChargerMode() INHIBIT_CHARGE 0 0 • 0 – Enable Charging (Power-On Default)

• 1 – Inhibit Charging

• Write Only. Read Will NACK

• Cleared to Power-On Reset Value When:

1) POR_RESET = 1

2) AC_PRESENT = 0

3) BATTERY_PRESENT = 0

ENABLE_POLLING 1 0 • 0 – Disable Polling (Power-On Default for Smart Battery Controlled

Chargers)

• 1 – Enable Polling (Power-On Default for Host Controlled Chargers).

• Ignored by LTC1759

• Write Only. Read Will NACK

POR_RESET 2 0 • 0 – Mode Unchanged (Default)

• 1 – Set Charger to Power-On Defaults

• This Reset Only Affects the Charger_Controller Block

• Write Only. Read Will NACK