LM3560 datasheet(34/48 Pages) TI1

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LM3560

SNOSB43B – SEPTEMBER 2011 – REVISED AUGUST 2013

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VIN MONITOR REGISTER (Address 0x80)

The VIN Monitor Register controls the Enable bit for the VIN Monitor, the threshold select for the VIN Monitor, the

enable bit for the VIN Flash Monitor, and the threshold select for the VIN Flash Monitor (see Table 12).

Table 12. VIN Monitor Register Descriptions

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

(Not used)

(VIN Flash

(VIN Monitor

Monitor

Threshold1)

Threshold0)

Enable)

Threshold 1)

Threshold 2)

enable)

N/A

00= 2.9V (default)

0 = VIN Flash

00 = 2.9V Default

0 = VIN Monitor

01 = 3.0V

Monitor is

01= 3.0V

disabled (default)

10 = 3.1V

disabled

10 = 3.1V

11 = 3.2V

(default)

11 = 3.2V

1 = VIN Flash

1 = VIN Monitor is

Monitor is

enabled

LAST FLASH REGISTER (Address 0x81)

The Last Flash Register is a read-only register which is loaded with the flash code corresponding to the flash

level that the LM3560 was at if any of the following events happen:

1. Voltage at LEDI/NTC falling below VTRIP with the device in NTC mode (Configuration Register 1 bit[4] = 1);

2. Input voltage falling below the programmed VIN Monitor Threshold with device in VIN Monitor mode (VIN

Monitor Register bit [0] = 1); or

3. Input voltage falling below the programmed VIN Flash Monitor Threshold with the device in VIN Flash

Monitor mode (VIN Monitor Register bit [3] = 1).

The Last Flash Register is updated at the same time that the corresponding Flag bit is written to the Flags

enabled) crosses the VIN_TH. During VIN Flash Monitor there is a 8us deglitch time so the VIN Flash Monitor Flag

is written (and the Last Flash Register is updated) 8 µs after VIN falls below VIN_FLASH.

Table 13. Last Flash Register Descriptions

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

(LF2A)

(LF2B)

(LF2C)

(LF2D)

(LF1A)

(LF1B)

(LF1C)

(LF1D)

These bits are read only and represent the Flash Current Code

These bits are read only and represent the Flash Current Code for

for LED2 that the LM3560 was at during the interrupt.

LED1 that the LM3560 was at during the interrupt.

0000 = 62.5 mA

0001 = 125 mA

0010 = 187.5 mA

0011 = 250 mA

0100 = 312.5 mA

0101 = 375 mA

0110 = 437.5 mA

0111 = 500 mA

1000 = 562.5 mA

1001 = 625 mA

1010 = 687.5 mA

1011 = 750 mA

1100 = 812.5 mA

1101 = 875 mA

1110 = 937.5 mA

1111 = 1000 mA

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