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PDF S-8813 Data sheet ( Hoja de datos )
| Número de pieza | S-8813 | |
| Descripción | 3-CHANNEL WHITE LED DRIVER IC | |
| Fabricantes | Seiko Instruments | |
| Logotipo |  |
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Rev.2.1_00
3-CHANNEL WHITE LED DRIVER IC
(CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT)
S-8813 Series
The S-8813 Series is a PFM control charge pump DC-DC
converter with a built-in constant-current circuit, and was
developed using CMOS technology. Its constant current output
makes this series ideal as a power supply for current drive
LEDs.
The S-8813 Series features three output channels and can
drive three LEDs.
This series is available in two types: a variable voltage type and
a variable current setting resistance type.
Moreover, since small ceramic capacitors can be used as
external capacitors (pump capacitors, input capacitors, output
capacitors), the S-8813 Series contributes to set
miniaturization.
Features
• PFM control CMOS charge pump
• Built-in constant-current circuit
• Power supply voltage: 2.7 V to 4.5 V
• Output current value: A current variable is possible between 5.0 mA and 18 mA
(At VIOUT1,2,3≤4.0 V, VIN=3.0 V)
Variable voltage type and Variable current setting resistance type are available.
• Terminal output current matching: ±1% max.
• Built-in soft start circuit:
1.5 ms typ.
• Constant current output pins:
3 channels, ±5% accuracy
• Oscillation frequency:
600 kHz typ.
• ON/OFF function provided (During standby: 1 µA max.)
• Ultra-small package:
10-Pin SON(B)
• Lead-free products
Applications
• Power supply for white LED display backlights
• Constant-current circuit
• Cellular phones and PDAs using 1-cell lithium batteries
• Power supply for flat panel displays
Package
Package Name
10-Pin SON(B)
Package
PE010-A
Drawing Code
Tape
PE010-A
Reel
PE010-A
Product Name List
• S-881300CPE-IPATFG (Variable current setting resistance type)
• S-881300BPE-IOQTFG (Variable voltage type)
Seiko Instruments Inc.
1
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1 page  
www.DataSheet.co.kr
3-CHANNEL WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT)
Rev.2.1_00
S-8813 Series
Electrical Characteristics
1. S-881300CPE
Table 3 Electrical Characteristics
(Unless otherwise specified, VIN = 3.0 V, current setting resistance = 5.6 kΩ, Ta = 25°C)
Item
Symbol
Conditions
Min. Typ. Max.
Unit
Test
Circuit
Operation input
voltage
VIN
⎯
2.7 ⎯ 4.5
V
2
Stabilized output
current
Output current VIOUT
characteristics
Output current input
stability
Output current
accuracy
IOUT
ΔIOUT1
ΔIOUT2
ΔIOUT1
IOUT
VIN = 3.0 V to 4.5 V
VIOUT1,2,3*1 ≤ 3.6 V
VIN = 3.0 V to 4.5 V
VI
*1
OUT1,2,3
≤
4.0
V
VIN = 2.7 V to 3.0 V
VI
*1
OUT1,2,3
≤
3.6
V
VIN = 3.0 V,
VIOUT= 3.0 V to 4.0 V
VIN = 3.0 V to 4.5 V
VIOUT ≤ 3.6 V
IOUT1,2,3 = 17.8 mA
23 ⎯ ⎯
18 ⎯ ⎯
14 ⎯ ⎯
⎯ 0.5
1
⎯ 0.5
1
−5.0 ⎯ +5.0
mA
%
Inter-pin output current
variation
ΔIM
VIOUT = 3.6 V
−1.0 ⎯ +1.0
Ripple voltage
Maximum oscillation
frequency
Efficiency*2
Operation
consumption current
Standby consumption
current
VRIP
fosc
η
ISS1
ISSS
VIN = 2.7 V to 4.5 V
IOUT1,2,3 = 18 mA
VCPOUT = 4.75 V
Measure waveform at C− pin
VIN = 3.0 V, IOUT1,2,3 = 18 mA
VIN = 2.7 V to 4.5 V
VCPOUT = 4.75 V
VIN = 2.7 V to 4.5 V
⎯ ⎯ 100 mVp-p
540 600 660
⎯ 82 ⎯
⎯ 1 1.5
kHz
%
mA
⎯ 0.3
1
μA
1
2
1
Power-off pin input
voltage (high level)
VSH VIN = 2.7 V to 4.5 V
2.0 ⎯
⎯
V
Power-off pin input
voltage (low level)
VSL VIN = 2.7 V to 4.5 V
⎯ ⎯ 0.3
Power-off pin input
current (high level)
ISH VIN = 2.7 V to 4.5 V
−0.1 ⎯
0.1
μA
Power-off pin input
current (low level)
ISL VIN = 2.7 V to 4.5 V
−0.1 ⎯
0.1
Soft start time
RISET pin voltage
tSS
VRISET
VIN = 2.7 V to 4.5 V
VIN = 2.7 V to 4.5 V
0.3 1.5
3
0.98 1 1.02
ms
V
2
*1. VIOUT1, 2, 3 are the voltages of the IOUT pin.
*2. “Efficiency” in the electrical characteristics means the efficiency of the charge pump circuit block. The ideal
efficiency is indicated by the following expression.
Efficiency =[ VCPOUT × (IOUT1 +IOUT2 +IOUT3) ] / [ 2.0 × VIN × (IOUT1 +IOUT2 +IOUT3) ]
The ideal efficiency including the constant current circuit is expressed as following expression.
Efficiency =[ (VIOUT1 ×IOUT1) + (VIOUT2 ×IOUT2) + (VIOUT3 ×IOUT3) ] / [ 2.0 ×VIN × (IOUT1 +IOUT2 +IOUT3) ]
Remark The numbers in the "test circuit" column correspond to the circuit numbers in the “Measurement
Circuits” section.
Seiko Instruments Inc.
5
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www.DataSheet.co.kr
3-CHANNEL WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT)
Rev.2.1_00
S-8813 Series
3. Constant current output circuit
The S-8813 Series features a three-channel constant current output circuit and enables driving of white
LEDs in the current mode.
In the case of the S-8813 Series, the constant current value can be controlled using one of the two
following methods according to the product.
In the case of the S-881300CPE, the desired constant current can be obtained with an external
resistance value. Since a reference voltage of 1 V ±2% is output to the RISET pin, application of
resistance R1 of 20 kΩ to 5.6 kΩ between the RISET pin and GND results in the flow of a constant current
of 50 μA to 178 μA in the current setting resistance (R1) due to the I = V/R relationship. Amplifying this
constant current 100 times and outputting it to IOUT1, IOUT2, and IOUT3 can obtain a constant current of
between 5 mA to 17.8 mA/channel.
1 : 100
CPOUT VCPOUT= 5.0 V
COUT=10 μF
IOUT1 (IOUT1=5.0 mA to 17.8 mA)
IOUT2 (IOUT2=5.0 mA to 17.8 mA)
IOUT3 (IOUT3=5.0 mA to 17.8 mA)
− RISET
+
R1=5.6 kΩ to 20 kΩ
1 V ±2%
reference voltage
Figure 8 Constant Current Circuit (S-881300CPE)
On the other hand, a constant current of the desired value can also be obtained for the S-881300BPE by
supplying the reference voltage to the VISET pin externally. Within the IC, a resistance of 10 kΩ is applied
between the VISET pin and GND. The application of a reference voltage of between 0.5 V and 1.8 V to
the VISET pin results in the flow of a current between 50 μA and 180 μA in the internal resistor (R2) due to
the I = V/R relationship. Amplifying this constant current 100 times and outputting it to IOUT1, IOUT2, and
IOUT3 can obtain a constant current of between 5 mA to 18 mA/channel.
1 : 100
CPOUT VCPOUT=5.0 V
COUT=10 μF
+
−
R2=10 kΩ
IOUT1 (IOUT1=5.0 mA to 17.8 mA)
IOUT1 (IOUT1=5.0 mA to 17.8 mA)
IOUT1 (IOUT1=5.0 mA to 17.8 mA)
VISET (VVISET=0.5 V to 1.8 V)
Figure 9 Constant Current Circuit (S-881300BPE)
Seiko Instruments Inc.
11
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