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 5. Input Undervoltage Current Limit Control

INPUT UNDERVOLTAGE CURRENT LIMIT CONTROL

REG0

SUB ADDRESS 0x00

DISABLE_INPUT_UVCL

DIRECTION

Write and Readback

DISABLE_INPUT_

UVCL

D7 D6 D5 D4 D3 D2 D1 D0

Enabled*

0

Disabled

1

*Default setting

Table 6. USB On-The-Go ID Pin Autonomous Start-Up

USB On-The-Go ID PIN AUTONOMOUS START-UP

REG0

SUB ADDRESS 0x00

LOCKOUT_ID_PIN

DIRECTION

Write and Readback

LOCKOUT_ID_PIN D7 D6 D5 D4 D3 D2 D1 D0

Autonomous

Start-Up Allowed*

0

Autonomous

Start-Up Disabled

1

*Default setting

Table 7. Input Current Limit Settings

INPUT CURRENT LIMIT SETTINGS

REG0, REG1

SUB ADDRESS 0x00 USB Input Current Limit USBILIM[4.0]

SUB ADDRESS 0x01 Wall Input Current Limit WALLILIM[4:0]

DIRECTION

Write and Readback

WALLILIM

USBILIM

D7 D6 D5 D4 D3 D2 D1 D0

100mA Max

(USB Low Power)*

00000

500mA Max

(USB High Power)

00001

600mA Max

00010

700mA Max

00011

800mA Max

00100

900mA Max

(USB 3.0)

00101

1000mA Typical

00110

1250mA Typical

00111

1500mA Typical

01000

1750mA Typical

01001

2000mA Typical

01010

2250mA Typical

01011

2500mA Typical

01100

2750mA Typical

01101

3000mA Typical

01110

2.5mA Max

(USB Suspend)

01111

SELECT

CLPROG1**

11111

*Default setting CLPROG1 and CLPROG2 shorted. Automatically reset

when input power is absent.

**Default setting two CLPROG resistors. Automatically reset when input

power is absent.

4156f

34

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