SM8150A

SEIKO NPC CORPORATION —2

6. PINOUT

(Top view)

7. PIN DESCRIPTION

Number

Name

I/O

Description

1

DIN3

O

*1. Connect to ground when no LED is connected.

2

DIN2

O

3

DIN1

O

4

VOUT

O

LED drive voltage output

5

C1P

–

Charge pump boost capacitor connection

6

C2P

–

Charge pump boost capacitor connection

7

C2M

–

Charge pump boost capacitor connection

8

PGND1

–

Ground (charge pump)

9

C1M

–

Charge pump boost capacitor connection

10

VIN1

–

Supply input (charge pump)

11

VEN

–

*2. Connect to a supply with

≥ 1.8mA drive current capability. If pull-up resistors Rup are connected to SCL, SDA, and SBN, the current

consumption increases by the amount flowing through the pull-up resistances only. The current component for each of the 3 pins is

given by Iup [mA] = VEN [V] / Rup [k

Ω].

12

SBN

I

*3. Pull-up or pull-down resistances are not built-in.

13

SCL

I

14

SDA

I/O

15

VIN2

–

Supply input (DC/DC converter)

16

LX

O

*4. Leave open circuit when not used (do not connect to ground).

17

PGND2

–

Ground (DC/DC converter)

18

FB

I

DC/DC converter feedback input

19

LDOUT2

O

20

VIN3

–

Supply input (logic and LDOs)

21

LDOUT1

O

22

VREF

O

Bypass capacitor connection

23

GND2

–

Ground

24

DIN7

O

25

DIN6

O

26

DIN5

O

27

GND1

–

Ground

28

DIN4

O

SDA

SCL

SBN

VEN

VIN1

C1M

PGND1

VREF

22

28

8

14

17

21

15

GND2

DIN7

DIN6

DIN5

GND1

DIN4