Datasheet

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TPS60251

SLVS767C – APRIL 2007 – REVISED NOVEMBER 2007

Aux Output Brightness and Operation Mode Control Register (Address: 0x03h)

AUX DISP

B7 B6 B5 B4 B3 B2 B1 B0

CURRENT

BIT NAME Iaux5 Iaux4 Iaux3 Iaux2 Iaux1 Iaux0 Mode1 Mode0

Bits 7 - 2 (DM5 set to Main Display Mode)

Iaux5 - Iaux0 (total 64 steps)

6-Bit command (64 steps) to these bits sets the current for DM5.

For LED currents between 0 and 1.5mA, one step = 0.1mA increment

For LED currents between 1.5 and 25.5mA, one step = 0.5mA increment

Bits 7 - 2 (DM5 set to Aux Display Mode)

Iaux5 Iaux4 Iaux3 Iaux2 Iaux1 Iaux0 Aux Dimming

(B7) (B6) (B5) (B4) (B3) (B2) Step

X X X X 0 0 20%

X X X X 0 1 40%

X X X X 1 0 70%

X X X X 1 1 100%

Bits 1,0 Mode1, Mode0

Mode1 Mode0

TPS60251 Mode

(B1) (B0)

0 0 Auto-Switchover Mode. The TPS60251 selects

1 × /1.5 × mode as described in the Operating Principle

section.

0 1 1 × Mode. TPS60251 remains in 1 × mode regardless

of the input voltage. LED current may not regulate at

lower input voltages when in this mode.

1 0 1.5 × Mode. TPS60251 remains in 1.5 × mode

regardless of the input voltage.

1 1 Auto-Switchover Mode. The TPS60251 selects

1 × /1.5 × mode as described in the Operating Principle

section.

Product Folder Link(s): TPS60251