Shutdown

Flash

External

Torch

Assist Light

Red

Indicator

OVP

SC

OTP

TO

DN

IF

IP

RFU

Fault and Info Register

Address: 0x05

Default:

0

0

0

0

X

0

0

0

Definition:

LM3555

SNVS594E – JANUARY 2009 – REVISED NOVEMBER 2011

www.ti.com

OVP: Over-Voltage Protection Fault. ‘1’ = Fault, ‘0’ = No Fault SC: Short Circuit Fault. ‘1’ = Fault, ‘0’ = No Fault

OTP: Over-Temperature Protection Fault. ‘1’ = Fault, ‘0’ = No Fault

TO: Flash Timeout Fault. ‘1’ = Fault, ‘0’ = No Fault

DN: Number of LEDs. ‘1’ = 2 LEDs, ‘0’ = 1 LED. (This bit is R/W). ‘1’ = Fault, ‘0’ = No Fault

IF: Indicator LED Fault. ‘1’ = Fault, ‘0’ = No Fault

IP: Inductor Peak Current Limit Fault (Broken Inductor Fault). ‘1’ = Fault, ‘0’ = No Fault

RFU: Not Used .

SIMPLE CONTROL STATE DIAGRAM

SIMPLE MODE TRUTH TABLE

EN1

EN2

Torch

Mode

0

0

0

Shutdown

0

0

1

External Torch

0

1

X

Assist Light

1

0

X

Indicator

1

1

X

Flash

22

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