MP3385A – 4-STRING WLED CONTROLLER WITH I

MP3385A Rev. 1.01

www.MonolithicPower.com

18

8/29/2017

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2017 MPS. All Rights Reserved.

Table 2: Operation Frequency Register

Addr: 0x01

Bit

Bit Name

Access

Default

Description

7

OCPM

RW

0b

Mode selection bit for cycle-by-cycle current limit.

0 = latch-off mode current limit

1 = recoverable mode current limit

4:6

LEDS2:0

RW

100b

LED short protection threshold. 1V/step. Default value is 8V.

000 = 4V

001 = 5V

111 = 11V

3:0

FS3:0

RW

0100b

Boost converter operation frequency set bits. Default frequency

is 400kHz.

0000b = boost converter off

0001b = 100kHz

0010b = 200kHz

0011b = 300kHz

0100b = 400kHz

0101b = 500kHz

0110b = 600kHz

0111b = 700kHz

1000b = 800kHz

1001b = 900kHz

Table 3: LED Current Full-Scale Register

Addr: 0x02

Bit

Bit Name

Access

Default

Description

7:0

ILED7:0

RW

00111011b

LED current full scale set bits. The set value corresponds to the

2%-100% external setting current value by a resistor. 0.39% per

step. The default value is 25%.

00000000b = 2%

11111111b = 100%