s-8813 Seiko Instruments Inc., s-8813 Datasheet - Page 5

• 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
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
RISET pin voltage
Rev.2.1
Electrical Characteristics
1. S-881300CPE
efficiency is indicated by the following expression.
The ideal efficiency including the constant current circuit is expressed as following expression.
IOUT1, 2, 3
Item
3-CHANNEL WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT)
*2
Circuits” section.
_00
Efficiency =[ V
Efficiency =[ (V
are the voltages of the IOUT pin.
OUT
(Unless otherwise specified, V
Symbol
ΔI
ΔI
V
CPOUT
ΔI
IOUT1
V
I
I
I
V
ΔI
I
V
V
f
RISET
OUT
OUT
I
t
SSS
I
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
VI
V
I
V
Measure waveform at C− pin
V
V
V
V
V
V
V
V
V
V
OUT1,2,3
OUT1,2,3
IN
IOUT1,2,3
IN
I OUT1,2,3
IN
I OUT1,2,3
IN
IOUT
IN
IOUT
IN
CPOUT
IN
IN
CPOUT
IN
IN
IN
IN
IN
IN
IN
Table 3 Electrical Characteristics
OUT
) + (V
= 3.0 V to 4.5 V
= 3.0 V to 4.5 V
= 2.7 V to 3.0 V
= 3.0 V,
= 3.0 V to 4.5 V
= 2.7 V to 4.5 V
= 3.0 V, I
= 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
+I
= 3.0 V to 4.0 V
≤ 3.6 V
= 3.6 V
OUT2
= 4.75 V
= 4.75 V
= 17.8 mA
= 18 mA
IOUT2
*1
*1
*1
≤ 3.6 V
Conditions
≤ 4.0 V
≤ 3.6 V
+I
OUT3
OUT1,2,3
×I
Seiko Instruments Inc.
OUT2
⎯
) ] / [ 2.0 × V
IN
) + (V
= 18 mA
= 3.0 V, current setting resistance = 5.6 kΩ, Ta = 25°C)
IOUT3
IN
×I
× (I
OUT3
OUT1
Min.
−5.0
−1.0
−0.1
−0.1
0.98
540
2.7
2.0
0.3
) ] / [ 2.0 ×V
23
18
14
⎯
⎯
⎯
⎯
⎯
⎯
⎯
+I
OUT2
Typ.
600
0.5
0.5
0.3
1.5
82
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
1
1
+I
IN
OUT3
× (I
) ]
Max.
1.02
+5.0
+1.0
OUT1
100
660
4.5
1.5
0.3
0.1
0.1
⎯
⎯
⎯
⎯
⎯
1
1
1
3
+I
S-8813 Series
OUT2
mV
Unit
kHz
mA
mA
ms
μA
μA
%
%
V
V
V
+I
p-p
OUT3
) ]
Circuit
Test
1
2
2
1
2
5