LTC4156IUFD View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LTC4156IUFD

Dual-Input Power Manager/3.5A LiFePO4 Battery Charger with I2C Control and USB OTG

Linear Technology 

LTC4156

OPERATION

Table 11. Battery Charger Float Voltage

Battery Charger Float Voltage

SUB ADDRESS 0x02

VFLOAT[1:0]

DIRECTION

Write and Readback

BATTERY

VOLTAGE (V)

D7 D6 D5 D4 D3 D2

3.45*

00

3.55

01

3.60

10

3.80

11

*Default setting.

REG2

D1 D0

Table 12. Full Capacity Charge Indication Threshold

FULL CAPACITY CHARGE INDICATION THRESHOLD

SUB ADDRESS

0x02

CXSET[1:0]

DIRECTION

Write and Readback

FULL-SCALE VPROG

CURRENT THRESHOLD

(%)

(V)

D7 D6 D5 D4 D3 D2

10*

0.120*

20

0.240

2

0.024

5

0.060

*Default setting.

REG2

D1 D0

00

01

10

11

Table 13. Battery Charger Status Report

BATTERY CHARGER STATUS REPORT

REG3

SUB ADDRESS

0x03

CHARGER_STATUS[2:0]

DIRECTION

Read

BATTERY CHARGER

STATUS

D7 D6 D5 D4 D3 D2 D1 D0

Charger Off

0 00

Low Battery Voltage 0 0 1

Constant Current

0 10

Constant Voltage,

VPROG>VC/X

0 11

Constant Voltage,

VPROG<VC/X

1 00

NTC TOO COLD,

Charging Paused

1 10

NTC HOT FAULT,

Charging Paused

1 11

36

Table 14. USB On-The-Go ID Pin Detection

USB On-The-Go ID PIN DETECTION

SUB ADDRESS 0x03

ID_PIN_DETECT

DIRECTION

Read

ID PIN STATUS D7 D6 D5 D4 D3 D2

No Detection

0

ID Pin Shorted to

GND*

1

*LOCKOUT_ID_PIN has no effect on pin detection.

REG3

D1 D0

Table 15. USB On-The-Go Enabled Status

USB On-The-Go ENABLED STATUS

SUB ADDRESS

0x03

OTG_ENABLED

DIRECTION

Read

STEP-UP REGULATOR

STATUS

D7 D6 D5 D4 D3 D2

Step-Up Switching

Regulator Inactive

0

Step-Up Switching

Regulator Active

1

REG3

D1 D0

Table 16. NTC Thermistor Status Report

NTC THERMISTOR STATUS REPORT

SUB ADDRESS 0x03

NTCSTAT[1:0]

DIRECTION

Read

NTC THERMISTOR

STATUS

D7 D6 D5 D4 D3 D2

NTC Normal

0

NTC_TOO_COLD

0

NTC_HOT_FAULT

1

REG3

D1 D0

0

1

1

Table 17. Low Battery Detection

LOW BATTERY DETECTION

REG3

SUB ADDRESS

0x03

LOWBAT

DIRECTION

Read

BATTERY VOLTAGE

STATUS

D7 D6 D5 D4 D3 D2 D1 D0

Normal

0

Low Cell Voltage*

1

*Low cell voltage is only meaningful when input (WALL or USB) power

is available and the battery charger is enabled, or when automatic or

manual enable of the step-up regulator has been requested.

4156f

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