LP5018 datasheet(16/49 Pages) TI1

16 / 49 page

INITIALIZATION

STANDBY

EN = H

From all states

RESET = FF or UVLO = H

SHUTDOWN

EN = L

From all states

VCC Power Up

Chip_EN = 1

Chip_EN = 0

NORMAL

POWER SAVE

I2C Command

Power_Save_EN =1 and

All LEDs off > 30ms

THERMAL

SHUTDOWN

TSD=H

TSD=L

LP5018, LP5024

SLVSEB8 – MARCH 2018

www.ti.com

Product Folder Links: LP5018 LP5024

Submit Documentation Feedback

8.3.5 Protection Features

8.3.5.1 Thermal Shutdown

The LP50xx device implements a thermal shutdown mechanism to protect the device from damage due to

overheating. When the junction temperature rises to 160°C (typical), the device switches into shutdown mode.

The LP50xx device releases thermal shutdown when the junction temperature of the device is reduced to 145°C

(typical).

8.3.5.2 UVLO

The LP50xx device has an internal comparator that monitors the voltage at VCC. When VCC is below VUVF, reset

is active and the LP50xx device is in the INITIALIZATION state.

8.4 Device Functional Modes

Figure 10. Functional Modes

•

INITIALIZATION: The device enters into INITIALIZATION mode when EN = H. In this mode, all the registers

are reset. Entry can also be from any state, if the RESET (register) = FFh or UVLO is active.

•

NORMAL: The device enters the NORMAL mode when Chip_EN (register) = 1. ICC is 10 mA (typ.).

•

POWER SAVE: The device automatically enters the POWER SAVE mode when Power_Save_EN (register) =

1 and all the LEDs are off for a duration of >30 ms. In POWER SAVE mode, analog blocks are disabled to

minimize power consumption, but the registers retain the data and keep it available via I2C. ICC is 10 µA (typ.).

In case of any I2C command to this device, it returns to the NORMAL mode.

•

SHUTDOWN: The device enters into SHUTDOWN mode from all states on VCC power up or when EN = L.

ICC is < 1 µA (max).

•

STANDBY: The device enters the STANDBY mode when Chip_EN (register) = 0. In this mode, all the OUTx

pins are shut down, but the registers retain the data and keep it available via I2C. STANDBY is the low-

power-consumption mode, when all circuit functions are disabled. ICC is 10 µA (typ.).

•

THERMAL SHUTDOWN: The device automatically enters the THERMAL SHUTDOWN mode when the

LP5018 Datasheet(PDF) 16 Page - Texas Instruments

LP5018 Datasheet(HTML) 16 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49

Datasheet Download

Link URL