S1F87110B0A Epson Electronics America, Inc., S1F87110B0A Datasheet - Page 4

• Manufacturer Part Number: S1F87110B0A
• Description: Led Controller
• Manufacturer: Epson Electronics America, Inc.

1. DESCRIPTIONS
backlight LED) in a linear sequence, based on evaluation of ambient brightness with a luminance sensor
connected to the device.
flowing through LEDs, and by sending the signals to the LED driver, it controls the LED luminance
automatically according to the ambient brightness level.
major modification of LED-related systems.
brightness mode, as well as customize automatic luminance control characteristics (brightness and PWM duty
settings).
add a function that automatically selects optimal LED current value in accordance with the brightness level of
the surrounding environment.
2. FEATURES
S1F87110B0A Series Technical Manual (Rev.1.0)
The S1F87110 is a LED controller which automatically controls luminance of LEDs used in cell phones (e.g.
The S1F87110 uses a unique algorithm for generating PWM signals which continuously modulate current
This function enables to achieve balance between visibility and low power consumption without requiring
A two-wire serial interface I
This I
Use of the S1F87110 with an existing LED driver provided with PWM input for LED brightness control can
2
C register can be used to start/stop, or set conditions such as automatic luminance control mode/fixed
This IC enables automatic luminance control without modification of existing LED driver.
Selectable between automatic luminance control mode and fixed brightness mode.
4-bit and 16-level brightness evaluation
PWM output for brightness control of LED driver
Selectable PWM cycle (Typ. 195Hz, 390Hz)
Selectable phase when PWM operating
Selectable ON/OFF of PWM output during standby
Available 7-bit, 128-gray scale PWM duty settings for automatic luminance control mode/fixed
brightness mode.
Customizable luminance characteristics
Interface
Shipment package Compact and slim type WCSP (X 1.70mm×Y 2.20mm×t (0.72)mm)
Selectable brightness evaluation sampling cycle
Selectable setting for brightness evaluation - PWM duty
Selectable rate of change for PWM duty
Two-wire serial interface I
Installs a compact photo IC (current output) type luminance sensor.
Can also install a photodiode type luminance sensor which has lower power consumption under
high illumination.
2
C-Bus slave function is provided with the S1F87110.
2
C (Max. 400kHz) slave controller
EPSON
1. DESCRIPTIONS
1