s-8813 Seiko Instruments Inc., s-8813 Datasheet - Page 6

• Manufacturer Part Number: s-8813
• Description: 3-channel White Led Driver Ic Charge Pump Ic With Built-in Constant-current Circuit
• Manufacturer: Seiko Instruments Inc.

*1. V
*2. “Efficiency” in the electrical characteristics means the efficiency of the charge pump circuit block. The ideal
Remark The numbers in the "test circuit" column correspond to the circuit numbers in the “Measurement
6
Operation input
voltage
Stabilized output
current
Output current VI
characteristics
Output current input
stability
Output current
accuracy
Inter-pin output current
variation
Ripple voltage
Maximum oscillation
frequency
Efficiency
Operation
consumption current
Standby consumption
current
Power-off pin input
voltage (high level)
Power-off pin input
voltage (low level)
Power-off pin input
current (high level)
Power-off pin input
current (low level)
Soft start time
VISET pin voltage
3-CHANNEL WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT)
S-8813 Series
2. S-881300BPE
efficiency is indicated by the following expression.
The ideal efficiency including the constant current circuit is expressed as following expression.
IOUT1, 2, 3
Item
*2
Circuits” section.
Efficiency =[ V
Efficiency =[ (V
are the voltages of the IOUT pin.
OUT
Symbol
ΔI
ΔI
V
CPOUT
ΔI
IOUT1
V
I
I
I
V
ΔI
I
V
V
f
VISET
OUT
OUT
I
t
SSS
I
(Unless otherwise specified, V
OUT1
OUT2
SS1
OUT1
osc
SH
η
SL
SS
RIP
SH
SL
IN
M
× (I
×I
OUT1
OUT1
V
V
V
V
V
V
V
V
V
V
I
V
V
V
Measure waveform at C- pin
V
V
V
V
V
V
V
V
V
V
OUT1,2,3
IN
IOUT1,2,3
IN
I OUT1,2,3
IN
I OUT1,2,3
IN
IOUT
IN
IOUT
IOUT
IN
CPOUT
IN
IN
CPOUT
IN
IN
IN
IN
IN
IN
IN
Table 4 Electrical Characteristics
) + (V
=2.7 V to 4.5 V
= 3.0 V,
= 3.0 V to 4.5 V
= 3.0 V
= 2.7 V to 4.5 V
= 2.7 V to 4.5 V
= 2.7 V to 4.5 V
= 2.7 V to 4.5 V
= 2.7 V to 4.5 V
= 2.7 V to 4.5 V
= 2.7 V to 4.5 V
= 2.7 V to 4.5 V
= 3.0 V to 4.5 V
= 3.0 V to 4.5 V
= 2.7 V to 3.0 V
+I
= 3.0 V to 4.0 V
= 3.6 V
≤ 3.6 V
OUT2
= 4.75 V
= 4.75 V
= 18 mA
IOUT2
*1
*1
*1
≤ 3.6 V
Conditions
≤ 4.0 V
≤ 3.6 V
+I
OUT3
×I
Seiko Instruments Inc.
OUT2
⎯
) ] / [ 2.0 × V
) + (V
IN
IOUT3
= 3.0 V, current setting voltage = 1.8 V, Ta = 25°C)
IN
×I
× (I
OUT3
OUT1
Min.
−5.0
−1.0
−0.1
−0.1
540
) ] / [ 2.0 ×V
2.7
2.0
0.5
0.3
23
18
14
⎯
⎯
⎯
⎯
⎯
⎯
⎯
+I
OUT2
Typ.
600
0.5
0.5
0.3
1.5
82
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
1
+I
IN
OUT3
× (I
) ]
Max.
+5.0
+1.0
OUT1
100
660
4.5
1.5
0.3
0.1
0.1
1.8
⎯
⎯
⎯
⎯
⎯
1
1
1
3
+I
OUT2
mV
Unit
kHz
mA
mA
ms
μA
μA
%
%
V
V
V
Rev.2.1
+I
p-p
OUT3
) ]
Circuit
Test
1
2
2
1
2
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