LM3560 datasheet(36/48 Pages) TI1

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LM3560

SNOSB43B – SEPTEMBER 2011 – REVISED AUGUST 2013

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FLASH DURATION REGISTER (Address 0xC0)

Bits [4:0] of the Flash Duration Register set the Flash Timeout duration. Bits [6:5] set the switch current limit (see

Table 16).

Table 16. Flash Duration Register Descriptions

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

(Not used)

(CL1)

(CL0)

(T4)

(T3)

(T2)

(T1)

(T0)

N/A

Current Limit Select Bits

Flash Time-out Select Bits

00 = 1.6A Peak Current Limit

00000 = 32 ms time-out

01 = 2.3A Peak Current Limit

00001 = 64 ms time-out

10 = 3.0A Peak Current Limit

00010 = 96 ms time-out

11 = 3.6A Peak Current Limit

00011 = 128 ms time-out

(default)

00100 = 160 ms time-out

00101 = 192 ms time-out

00110 = 224 ms time-out

00111 = 256 ms time-out

01000 = 288 ms time-out

01001 = 320 ms time-out

01010 = 352 ms time-out

01011 = 384 ms time-out

01100 = 416 ms time-out

01101 = 448 ms time-out

01110 = 480 ms time-out

01111 = 512 ms time-out (default)

10000 = 544 ms time-out

10001 = 576 ms time-out

10010 = 608 ms time-out

10011 = 640 ms time-out

10100 = 672 ms time-out

10101 = 704 ms time-out

10110 = 736 ms time-out

10111 = 768 ms time-out

11000 = 800 ms time-out

11001 = 832 ms time-out

11010 = 864 ms time-out

11011 = 896 ms time-out

11100 = 928 ms time-out

11101 = 960 ms time-out

11110 = 992 ms time-out

11111 = 1024 ms time-out

FLAGS REGISTER (Address 0xD0)

The Flags Register holds the flag bits indicating Flash Timeout, Thermal Shutdown, LED Fault (Open or Short),

TX Interrupts (TX1 and TX2), LED Thermal Fault (NTC), VIN Monitor Trip, and VIN Flash Monitor Trip. All Flags

are cleared on read back of the Flags Register. (See Table 17).

Table 17. Flags Register Descriptions

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

(VIN Monitor)

(VIN Flash

(NTC Fault)

(TX2

(TX1 Interrupt )

(LED Fault)

(Thermal

(Flash Time-

Monitor)

Interrupt)

Shutdown)

out)

0 = VIN is

VIN did not fall

0 = LEDI/NTC

0 = TX2 has

0 = TX1 has not

0 = Proper

0 = Die

0 = Flash Time-

above the VIN

below the VIN

pin is above

not changed

changed state

LED Operation

Temperature

Out did not

Monitor

Flash Monitor

1V(default)

state (default)

(default)

below Thermal

expire (default)

Threshold or

threshold

Shutdown Limit

VIN Monitor

during flash

(default)

Threshold is

pulse turn-on

Disabled

or VIN Flash

(default)

Monitor is

disabled

(default)

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