MP3373, 8 STRINGS, WLED CONTROLLER WITH EXTERNAL TRANSISTOR

MP3373 Rev. 1.02

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10

8/16/2016

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Pin #

Name

Description

16

FB5

LED Current Feedback Pin. Detect the channel 5 LED current.

17

CTL6

External Transistor Control Pin. Connect it to the base of external transistor to regulate

the channel 6 LED current.

18

FB6

LED Current Feedback Pin. Detect the channel 6 LED current.

19

CTL7

External Transistor Control Pin. Connect it to the base of external transistor to regulate

the channel 7 LED current.

20

FB7

LED Current Feedback Pin. Detect the channel 7 LED current.

21

CTL8

External Transistor Control Pin. Connect it to the base of external transistor to regulate

the channel 8 LED current.

22

FB8

LED Current Feedback Pin. Detect the channel 8 LED current.

23

FAULT

Fault Flag Output Pin. This pin is the open drain of internal N-MOSFET. FAULT is pulled

up to external DC level at normal mode. When fault protection is triggered, internal

MOSFET turns on and the FAULT pin is pulled to GND.

24

OVP

Over-voltage Protection Input. Connect a resistor divider from output to this pin to

program the OVP threshold.

25

PGND

Step-up Converter Power Ground.

26

ISENSE

Current Sense Input. During normal operation, this pin detects the inductor current by a

sensing resistor for peak current mode control and over current protection. If this pin is

not used in extending application with other master MP3373, tie this pin to GND, do not

let this pin floating.

27

GATE

Step-up Converter Power Switch Gate Output. This pin drives the external power N-MOS

device.

28

PSEN

Phase Shift Function Enable Pin. Leave this pin float, phase shift function is enabled. To

disable the phase shift function by pulling this pin to GND.