SM8136A

SEIKO NPC CORPORATION —13

LED

× 2

Note. If the driving LED is less than 3 pcs, unused DIN pins should be connect to GND.

The HIGH-level and LOW-level pulsewidths for the pulse input on EN must be 4.0

µs or longer (see “Electrical Characteristics”).

1

µF

1

µF1µF

1

µF

VIN

EN

Control

logic

Current

control

&

Current

detect

Mode control

&

Output voltage control

&

Protection

C1P

C1M

C2P

C2M

VOUT

DIN1

DIN2

DIN3

GND

Charge pump

1/ 1.5

20mA 2