s1f81310f0a Epson Electronics America, Inc., s1f81310f0a Datasheet - Page 5

• Manufacturer Part Number: s1f81310f0a
• Description: Charge-pump Type White Led Driver.
• Manufacturer: Epson Electronics America, Inc.

1. APPLICABLE DEVICES
2. OVERVIEW
■ Features
● Drives 1 to 6 white LEDs
● Low current variation between LEDs
● 2 EN input signal brightness controls
● 2-wire startup/brightness operation
● 2 LED brightness control groups
● Max. LED current set by external resistor
● Low noise charge-pump booster circuit
● Automatic booster circuit switching for
low power consumption
● Soft-start circuit built-in
● Small package (QFN20)
3. BLOCK DIAGRAM
S1F81310F0A (Rev.1.0)
This document applies to the S1F81310F0A white LED driver ICs.
The S1F81310 is a charge-pump type white LED driver. It can drive up to 6 white LEDs connected in parallel
from the VOUT output voltage. The LED driver current is controlled using a 6-channel LED current
adjustment circuit. The LED brightness is determined by the current-setting resistance connected to ISET and
by the input signals on EN1 and EN2, where the 6 channels can be divided into 2 groups (EN1 and EN2
inputs) using SEL1 and SEL2. The LED drive voltage VOUT automatically switches between 1.0x and 1.5x
charge-pump boost mode, depending on the battery voltage, LED drive current, and the LED VF
characteristics, to help extend battery life.
DIN3
DIN2
DIN1
ISET
C1P
GND
C1M
1.5x Charge Pump
LED current
PGND
DIN4
VOUT mode
● Input voltage range
● IC current consumption
● Max. output voltage
● Max. output current
● Standby current
● Operating frequency
● LED current
● 6-channel current
control
controller
EPSON
DIN5
C2M
DIN6
C2P
VREG
VREG
: 2.7 to 4.6V
: 0.7mA (Typ@1.0x mode)
: 2.0mA (Typ@1.5x mode)
: 4.2V (trimmed)
: 120mA
: 0.01μA (Typ.)
: 750kHz (Typ.)
: 20mA (Typ@ISET=20kΩ,1.0x mode)
: ≤ ±3% variation
EN1
1. APPLICABLE DEVICES
VOUT
SEL1
SEL2
EN2
VIN
1