S1F76680 Epson Electronics America, Inc., S1F76680 Datasheet - Page 9

• Manufacturer Part Number: S1F76680
• Description: Led Driver
• Manufacturer: Epson Electronics America, Inc.

6. PIN DESCRIPTION
S1F76680 Technical Manual (Rev.1.22)
(1) Power Supply Pin
(2) Input pin
Pin Name
Pin Name
V
V
V
V
V
V
EN1
EN2
EN3
DD1
DD2
DDL
SS1
SS2
SS3
1
(QFN5-32)
(QFN5-32)
PIN No.
PIN No.
32
13
26
22
17
7
5
8
4
Power supply pin.
Supply voltage that obtains V
Since V
capacitor CV
Supply voltage that obtains V
Connect a bypass capacitor CV
Ground pin.
This IC is set to the standby mode as EN1=L is selected.Whenever starting this IC
from the standby mode, change the state of EN1 from L to H. When EN1=L, too, also
allows input to and output from I
setting of the EN2 pin to be described later or I
No.P22)Setting of EN2 (SEN)-L, in which the standby current value is reduce, is
recommended for the standby mode.
It is pulled down internally.
The automatic luminance control circuit operates based on the setting of this EN2 pin
or that of I
If you do not select the operating state of the automatic luminance control circuit with
the EN2 pin, fix EN2 pin to LOW, and select the operating state with I
(SEN2).
It is pulled down internally.
Fix EN3 pin to LOW when activating automatic luminance control.
If EN3 pin is fixed to HIGH, LED will light at maximum luminance regardless of the
setting of EN2.
Power supply pin for I
Input pin for activating IC. It is pulled down internally.
Input pin that selects activation/stop state for the automatic luminance control circuit.
Forced full lighting select pin.
EN1 (with pull-down)
EN2 (with pull-down)
EN3 (with pull-down)
DD1
2
C register (SEN2), which will be explained later.
is a power supply pin for the charge pump circuit, connect a bypass
DD
H
H
H
L
L
L
immediately next to the V
2
C I/O signal interface.
EPSON
DD1
DD1
Automatic luminance control circuit activated state
DDL
2
Automatic luminance control circuit stop state
C circuit.The standby current value depends on the
= V
= V
immediately next to V
DD2
DD2
Function
Function
Automatic luminance control mode
≥ V
≥ V
DD1
Forced full lighting mode
DDL
DDL
Circuit operating state
pin.
.
.
Standby state
Function
Function
Function
6. PIN DESCRIPTION
2
DDL
C register (SEN2). (See
pin.
2
C register
5