S-8813 Datasheet, PDF (9/29 Pages) Seiko Instruments Inc – 3-CHANNEL WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT)

3-CHANNEL WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT)
Rev.2.1_00
S-8813 Series
S-881300CPE
VIN
CIN=4.7 μF
SW1
C+
CPUMP=0.22 μF
C−
SW2
SW 3
SW 4
Switch
control
circuit
PFM
control
oscillator
(600 kHz)
Soft
Start
circuit
ON/OFF
circuit
ON/OFF
Rs
+
Rf
−
–
+
Reference
voltage
GND
S-881300BPE
VIN
CIN=4.7 μF
SW1
C+
CPUMP=0.22 μF
C−
SW2
SW3
SW4
Switch
control
circuit
PFM
control
oscillator
(600 kHz)
Soft
Start
circuit
ON/OFF
circuit
ON/OFF
Rs
+
Rf
−
Reference
voltage
+
−
R
*2
2
GND
*1. Current setting resistance
*2. Internal resistance
Figure 5 Block Diagram
CPOUT
COUT=10 μF
IOUT1
IOUT2
IOUT3
RISET
R
*1
1
CPOUT
COUT=10 μF
IOUT1
IOUT2
IOUT3
VISET
Seiko Instruments Inc.
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