LM3555TLE Datasheet, PDF (22/33 Pages) Texas Instruments – LM3555 Synchronous Boost Converter with 500 mA High Side LED Driver and Dual-Mode Control Interface

LM3555
SNVS594E – JANUARY 2009 – REVISED NOVEMBER 2011
Fault and Info Register
Address: 0x05
Definition: OVP SC OTP TO DN IF
IP RFU
Default: 0 0 0 0 X 0 0 0
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
Flash
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Assist Light
Shutdown
SIMPLE MODE TRUTH TABLE
I²C/EN = ‘0’
EN1
EN2
0
0
0
0
0
1
1
0
1
1
Red
Indicator
External
Torch
Torch
0
1
X
X
X
Mode
Shutdown
External Torch
Assist Light
Indicator
Flash
22
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