MP3385A – 4-STRING WLED CONTROLLER WITH I

MP3385A Rev. 0.1

www.MonolithicPower.com

6

8/29/2017

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

© 2017 MPS. All Rights Reserved.

Parameters

Symbol

Condition

Min

Typ

Max

Unit

Current Regulation

ISET voltage

1.93

1.98

2.03

V

LEDX average current

ILED = FFh

192

201

210

mA

Full scale current

ILED7:0 bits = 00h

2

%

ILED7:0 bits = FFh

(5)

100

%

Current matching

(6)

1.8

%

LEDX regulation voltage

820

mV

700

mV

500

mV

Protection

OVP threshold

OVP4:0 bits = 00000b

16.8

18

18.9

V

OVP4:0 bits = 11100b

71.5

74

75.5

V

OVP UVLO threshold

Step-up converter fails

2.5

V

LEDX UVLO threshold

147

206

265

mV

LEDX over-voltage threshold

LEDS2:0 bits = 000b

4

V

LEDS2:0 bits = 111b

11

V

Thermal protection threshold

150

°C

Thermal protection hysteresis

25

°C

I

Input logic low

0.4

V

Input logic high

1.3

V

Output logic low

0.4

V

SCL clock frequency

400

kHz

SCL high time

0.6

μs

SCL low time

1.3

μs

Data set-up time

100

ns

Data hold time

0

0.9

μs

Set-up time for repeated start

0.6

μs

Hold time for start

0.6

μs

Bus-free time between a start

and stop condition

1.3

μs

Set-up time for stop condition

0.6

μs

Rise time of SCL and SDA

20 + 0.1

300

ns

Fall time of SCL and SDA

20 + 0.1

300

ns

Pulse width of suppressed

spike

0

50

ns

Capacitance bus for each bus

line

400

pF

NOTES:

5)

Guaranteed by design.

6)

Matching is defined as the difference between the maximum to minimum current divided by 2x the average currents.