s-8813 Seiko Instruments Inc., s-8813 Datasheet
s-8813
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s-8813 Summary of contents
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... Product Name List • S-881300CPE-IPATFG (Variable current setting resistance type) • S-881300BPE-IOQTFG (Variable voltage type) 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 ...
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... WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT) S-8813 Series Block Diagrams 1. S-881300CPE VIN =4.7 μ =0.22 μF C PUMP SW 3 C− S-881300BPE VIN =4.7 μ =0.22 μF C PUMP SW 3 C− *1. Current setting resistance *2. Internal resistance 2 ...
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... RISET / VISET output current. In the case of VISET, changing the voltage applied to this pin can vary the output current. Power-off pin 10 High level: Normal operation (Step-up operation) ON/ OFF Low level: Stepping-up halt (Whole circuit stopped) Seiko Instruments Inc. S-8813 Series Description 3 ...
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... WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT) S-8813 Series Absolute Maximum Ratings Item IOUT pin voltage C+ pin voltage C− pin voltage VIN pin voltage CPOUT pin voltage RISET/VISET pin voltage pin voltage ON/ OFF Power dissipation Operating ambient ...
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... × 2.0 × V OUT1 OUT2 OUT3 × × OUT1 IOUT2 OUT2 IOUT3 Seiko Instruments Inc. S-8813 Series Min. Typ. Max. ⎯ 2.7 4.5 ⎯ ⎯ 23 ⎯ ⎯ 18 ⎯ ⎯ 14 ⎯ 0.5 1 ⎯ 0.5 1 −5.0 ⎯ +5.0 −1.0 ⎯ ...
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... WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT) S-8813 Series 2. S-881300BPE (Unless otherwise specified, V Item Symbol Operation input V IN voltage Stabilized output I OUT current Output current VI OUT ΔI OUT1 characteristics Output current input ΔI OUT2 stability ΔI Output current ...
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... 0.22 μ ON/OFF IOUT1 RISET/ IOUT2 VISET CPOUT IOUT3 C + VIN 4.7 μ − GND ON/OFF IOUT1 RISET/ IOUT2 VISET CPOUT IOUT3 VIN C+ 4.7 μF GND C− Figure 4 Measurement Circuits Seiko Instruments Inc. S-8813 Series 5.6 k Ω 5.6 kΩ 10 μ ...
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... S-8813 Series Operation 1. Basic Operation The S-8813 series controls by using the pulse frequency modulation (PFM) method. The SW1 to SW4 switching transistors are switched ON/OFF with the clock generated by the internal oscillator (OSC), and operates the step-up charge pump. The output voltage is feed back and the voltage split by feedback resistances R voltage (V ) are compared by a comparator ...
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... R s PFM + Switch control R control f oscillator − circuit (600 kHz) Soft Start circuit ON/OFF Reference circuit voltage ON/OFF Figure 5 Block Diagram Seiko Instruments Inc. S-8813 Series CPOUT C OUT IOUT1 IOUT2 – IOUT3 + RISET * GND CPOUT C IOUT1 IOUT2 + IOUT3 − VISET *2 ...
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... SW4 to ON (charge cycle). Following charging the electricity, in order to discharge the charged electricity to the output capacitance (C OFF (discharge cycle). The input voltage can be stepped constant voltage value by repeating this charge cycle and discharge cycle. In the S-8813 Series, the ...
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... 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 ± ...
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... IN ON/OFF Figure 10 Equivalent Circuit of 5. Soft Start Function The S-8813 Series features a built-in soft start circuit. Upon power application or when the ON/ OFF pin is switched from "L" to "H", the output voltage gradually rises over the soft start time, and the output current is gradually output as a result. This soft start function reduces the input current rush ...
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... WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT) Rev.2.1 _00 Application Circuit Examples 1. Variable Current Setting Resistance Type White LED 0.22 μF Figure 11 Application Circuit 1 (S-881300CPE) =3.0 V, Ta=25 ° =3.0 V IOUT 25 V =3.5 V IOUT =4 IOUT Ω ] ...
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... WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT) S-8813 Series 2. Variable Voltage Type White LED 0.22 μF Figure 14 Application Circuit 2 (S-881300BPE) =3.0 V, Ta=25 ° =3.0 V IOUT 20 V =3.5 V IOUT 0.0 0.5 1.0 1.5 V [V] VISET Figure 15 V Dependence (S-881300BPE) VISET 14 ON/OFF IOUT1 VISET ...
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... WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT) Rev.2.1 _00 3. Regulating Luminance Circuit via PWM control signal (It corresponds only to S-881300CPE.) White LED 0.22 μF Figure 17 Application Circuit 3 (S-881300CPE) (1) When f =1.0 kHz PWM =1.0 kHz, Ta=25° PWM =5.6 kΩ, R ...
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... WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT) S-8813 Series (2) When f =20 kHz PWM =20 kHz, Ta=25° PWM =5.6 kΩ =20 kΩ PWM Duty Ratio [%] Figure 22 I -PWM Duty Ratio Dependence 2 ...
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... Pulse input voltage (“L” OUT 1 value is the 100 times value of the RISET pin voltage (1 V) divided by the OUT value. Z Seiko Instruments Inc. S-8813 Series T OFF T Max. 20 kHz 4 Max.500 Ω ) × 100 × (1-Duty ratio actual operation. ...
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... Seiko Instruments Inc. shall not be responsible for any patent infringements caused by products using the S-8813 Series in connection with the method in which the S-8813 Series is used in such products, the product specifications, or the country of destination. ...
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... Ripple Voltage (V Characteristics R =5.6 kΩ 4 3 100 ) vs. Ambient Temperature 8. Soft Start Time (T Characteristics 2.5 2.0 1 1.0 0.5 0 100 Seiko Instruments Inc. S-8813 Series ) vs. Ambient Temperature SH 1 1.0 V 0.8 IN 0.6 0.4 −40 − [°C] ) vs. Ambient Temperature (Ta) RISET 1 0.9 0.8 −40 −20 0 ...
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... WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT) S-8813 Series 9. Stabilized Output Current (I ) vs. Ambient Temperature OUT (Ta) Characteristics R =5.6 kΩ 19.0 18.5 18.0 17 3.0 V IOUT V = 3.5 V 17.0 IOUT V = 4.0 V IOUT 16.5 16.0 −40 − [°C] 11. Inter-Pin Output Current Variation ( Δ I Temperature (Ta) Characteristics 1.0 0.8 0.6 0 ...
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... Operation Input 4. RISET Pin Voltage (V 4.0 4.5 5.0 ) Characteristics 6. CPOUT Pin Voltage (V IN Ta=25°C 4.0 4.5 5.0 ) Characteristics 8. Ripple Voltage ( =5.6 kΩ ISET 4.0 4.5 5.0 Seiko Instruments Inc. S-8813 Series ) vs. Operation Input Voltage SH 1.2 1.0 0.8 Ta=−40°C Ta=25°C 0.6 Ta=85°C 0.4 2.0 2.5 3.0 3.5 4 vs. Operation Input Voltage (V RISET 1.2 Ta=−40°C Ta=25°C 1.1 Ta=85° ...
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... WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT) S-8813 Series 9. Maximum Oscillation Frequency (f OSC Voltage (V ) Characteristics IN 800 750 700 Ta=85°C 650 600 Ta=25°C 550 500 450 Ta=−40°C 400 2.0 2.5 3.0 3.5 V [V] IN 11. Stabilized Output Current (I ) vs. Operation Input Voltage OUT ...
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... Ta=25°C 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 100 + 2.0 × V ×(I +I OUT2 OUT3 IN OUT1 ×I ) +(V × 2.0 ×V IOUT2 OUT2 IOUT3 OUT3 Seiko Instruments Inc. S-8813 Series ) vs. Stabilized Output Current CPOUT V =3.0 V. Ta=25° [mA] OUT + OUT2 OUT3 ×( OUT1 OUT2 OUT3 60 70 ...
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... WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT) S-8813 Series Transient Response Characteristics Examples 1. Power-Off Pin Response 3.0 V Input Voltage div] IOUT Pin Voltage [ div] Output Current [ div] t [500 μs / div] 3. Power Supply Voltage Transition 4.5 V Input Voltage 3 ...
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... WHITE LED DRIVER IC (CHARGE PUMP IC WITH BUILT-IN CONSTANT-CURRENT CIRCUIT) Rev.2.1 _00 1.0 μ Ripple Characteristics (C OUT mA/ch, V OUT 3.50 3.40 3.30 3.20 3.10 3.00 t [20 μs / div 0.015 0.013 I OUT 0.011 0.009 V IOUT 0.007 0.005 Seiko Instruments Inc. S-8813 Series 25 ...
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... Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc ...