S1F76540MOC Epson Electronics America, Inc., S1F76540MOC Datasheet

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S1F76540MOC

Manufacturer Part Number
S1F76540MOC
Description
Charge Pump Type Dc/dc Converter
Manufacturer
Epson Electronics America, Inc.
Datasheet
S1F76540M0C Series
Technical Manual
Rev.1.0

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S1F76540MOC Summary of contents

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S1F76540M0C Series Technical Manual Rev.1.0 ...

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NOTICE No part of this material may be reproduced or duplicated in any form or by any means without the written permission of Seiko Epson. Seiko Epson reserves the right to make changes to this material without notice. Seiko Epson ...

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DESCRIPTION.............................................................................................................1 1.1 Description.................................................................................................................................1 1.2 Features .....................................................................................................................................1 2. BLOCK DIAGRAM ......................................................................................................2 3. PIN ASSIGNMENT ......................................................................................................2 4. PIN DESCRIPTION......................................................................................................3 5. FUNCTIONAL DESCRIPTION.....................................................................................4 5.1 Clock Generator ........................................................................................................................4 5.2 Voltage Converter ......................................................................................................................5 5.3 Reference Voltage Circuit .........................................................................................................6 5.4 Voltage Stabilizer .......................................................................................................................7 5.5 Power-off ...

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DESCRIPTION 1.1 Description S1F76540 consists of charge pump type DC/DC converter and voltage regulator with high efficiency and low power consumption using the CMOS process. The charge pump type DC/DC converter uses four (three or two) external capacitors to ...

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BLOCK DIAGRAM 2. BLOCK DIAGRAM V DD POFF1X Power-off control circuit POFF2X Clock FC generator VI C1P C1N C3N 3. PIN ASSIGNMENT 2 Soft start circuit Boost control circuit Voltage converter C2P C2N Fig.2.1 Block Diagram VO 1 VRI ...

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PIN DESCRIPTION Pin Name Pin No VRI REG TC1 7 TC2 8 POFF2X 9 POFF1X C1P 12 C1N 13 C3N 14 C2N 15 C2P ...

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FUNCTIONAL DESCRIPTION 5. FUNCTIONAL DESCRIPTION 5.1 Clock Generator S1F76540, which contains a clock generator for boosting control, requires no external parts. The clock frequency varies depending on the FC pin level (see Table 5.1), and you can select either ...

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Voltage Converter The voltage converter, which consists of boosting control circuit and voltage converter, boosts the input power supply voltage VI to four times (triple or double) using clocks from the clock generator. However, the 3rd or double boosting ...

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FUNCTIONAL DESCRIPTION 5.3 Reference Voltage Circuit S1F76540 contains a reference voltage circuit for a voltage stabilization circuit (regulator). The stabilizing potential described in Section 5.4 is defined with the split ratio between the external resistance and reference voltage values. ...

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Voltage Stabilizer The voltage stabilizer stabilizes the voltage input to the VRI pin and outputs any voltage. The output voltage can be changed to any value based on the ratio between external split resistances R1 and R2 as shown ...

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FUNCTIONAL DESCRIPTION Therefore R1 and R2 will be determined as follows 75kΩ 825kΩ [Changing the temperature coefficient] The temperature coefficient of the stabilizing potential depends on that of the reference voltage described in Section 5.3. ...

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Power-off Control Circuit S1F76540 provides the power-off function, which turns each function on and off by issuing the signals shown in Table 5.3 from the external system (microprocessor, etc.) to the POFF1X and POFF2X pins. Using the power-off function, ...

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FUNCTIONAL DESCRIPTION 5.6 Soft Start Circuit The soft start circuit is used to minimize the peak value of the rush current at startup of the booster. As shown in Fig.5.5, the maximum 200 ms (100mSec Typ.) after the input ...

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ABSOLUTE MAXIMUM RATINGS Item Symbol Input power voltage Input pin voltage Output pin voltage 1 VOC1 Output pin voltage 2 VOC2 Output pin voltage 3 VOC3 Output pin voltage 4 VOC4 Regulator input power VRI supply voltage Regulator input ...

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ELECTRICAL CHARACTERISTICS MEASUREMENT STANDARD 7. ELECTRICAL CHARACTERISTICS MEASUREMENT STANDARD 7.1 DC Characteristics Item Symbol Input power voltage VI Boosting start input power VSTA supply voltage Boosting output voltage VO Regulator input voltage VRI Regulator output voltage V REG Boosting ...

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ELECTRICAL CHARACTERISTICS MEASUREMENT STANDARD Item Symbol Stabilization-output RSAT saturated resistance (Note 1) ∆VR Stability of regulated output voltage (Note 2) ∆VO Stabilization-output load change (Note 3) VREF0 Reference voltage VREF1 (Ta=25°C) VREF2 VREF3 CT0 Reference voltage CT1 temperature coefficient ...

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ELECTRICAL CHARACTERISTICS MEASUREMENT STANDARD 7.2 AC Characteristics Item Symbol Internal clock frequency 1 f CL1 Internal clock frequency 2 f CL2 14 Table 7.2 AC Characteristics Unless otherwise noted: V Conditions Ta=25°C DD POFF1X= VI Ta= ...

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CHARACTERISTICS GRAPHS 4.2 V =-2.4V to -5V I 4.0 3.8 3.6 3.4 3.2 3.0 -40 - Ta[°C] (1) Internal clock frequency 1 - Temperature 3rd boosting 5 Ta=25° ...

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CHARACTERISTICS GRAPHS 10 Quadruple boosting 9 Double boosting 3rd boosting 3 Ta=25° =-2. =10µ ...

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Double boosting Peff 90 80 Quadruple boosting Peff 70 3rd boosting Peff 60 Quadruple boosting 3rd boosting Double boosting Ta=25°C V =-2. ...

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CHARACTERISTICS GRAPHS 6.00 5.99 5.98 5.97 5.96 5.95 5.94 5.93 5.92 Ta=25°C 5.91 V =-12V RI 5.90 0.1 1.0 I [mA] REG (13) Output voltage ( Output current REG ...

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REFERENCE: EXTERNAL CONNECTION EXAMPLES 9.1 Quadruple Boosting + Regulator Fig.9.1 shows a “quadruple boosting + regulator” connection example that is standard in S1F76540. Perform quadruple boosting in the negative direction for input voltage VI, and generate the stabilized voltage ...

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REFERENCE: EXTERNAL CONNECTION EXAMPLES 9.2 3rd Boosting + Regulator Perform 3rd boosting in the negative direction for input voltage VI, and generate the stabilized voltage in the VREG pin. Fig.9.2 shows a connection example. V REG ...

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Double Boosting + Regulator Perform double boosting in the negative direction for input voltage VI, and generate the stabilized voltage in the V pin. REG Fig.9.3 shows a connection example. V REG Fig.9.3 Double boosting ...

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REFERENCE: EXTERNAL CONNECTION EXAMPLES 9.4 Quadruple Boosting Run only the booster, perform quadruple boosting in the negative direction for input voltage VI, and generate the voltage in the VO pin. In this case, the regulator is not used, so ...

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Boosting Run only the booster, perform 3rd boosting in the negative direction for input voltage VI, and generate the voltage in the VO pin. In this case, the regulator is not used, so the voltage containing ripple components ...

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REFERENCE: EXTERNAL CONNECTION EXAMPLES 9.6 Double Boosting Run only the booster, perform double boosting in the negative direction for input voltage VI, and generate the voltage in the VO pin. In this case, the regulator is not used, so ...

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Parallel Connection (Boosting Capacity Increase) The parallel connection is effective when lowering the boosting output impedance or reducing the ripple voltage. Connecting n S1F76540s in parallel sets the boosting output impedance to approximately 1/n. Only the smoothing capacitor CO ...

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REFERENCE: EXTERNAL CONNECTION EXAMPLES 9.8 High-Magnification Boosting Using a Diode Loading an external diode in S1F76540 enables the “quintuple or more boosting + regulator” connection. Using the forward voltage lowering diode raises the boosting output impedance; ...

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Power-off method Set the POFF1X pin to level LOW (VI); all circuits will be turned off. Output voltage When loading a diode for boosting, the diode characteristics directly affect the boosting characteristics. Especially using the VF pin (forward voltage lowering) ...

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REFERENCE: EXTERNAL CONNECTION EXAMPLES 9.8.2 Sextuple Boosting + Regulator Fig.9.11 shows a “sextuple boosting + regulator” connection example with two diodes used. The cable from VO to VRI must be as short as possible. Fig.9.12 shows the electric potential ...

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Power-off method Set the POFF1X pin to level LOW (VI); all circuits will be turned off. Output voltage When loading diodes for boosting, the diode characteristics directly affect the boosting characteristics. Especially using the VF pin (forward voltage lowering) in ...

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REFERENCE: EXTERNAL CONNECTION EXAMPLES 9.9 Positive Voltage Converter S1F76540 boosts to the positive electric potential side using an external diode; however, it cannot use the regulator function. Fig.9.13 shows a “positive 3rd boosting” connection example, and Fig.9.14 shows the ...

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Power-off method Set the POFF2X pin to level LOW (VI); all circuits will be turned off. For double boosting: When performing double boosting, delete C2 and D1 shown in Fig.9.13, and connect the D2 anode (positive pole) side to V ...

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REFERENCE: EXTERNAL CONNECTION EXAMPLES 9.10 Connection Example when Changing the Regulator Temperature Coefficient The temperature coefficient of the regulator is determined depending on that of the internal reference voltage as described in Section 5.3. When setting the other temperature ...

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... AMERICA EPSON ELECTRONICS AMERICA, INC. HEADQUARTERS 2580 Orchard Parkway San Jose , CA 95131,USA Phone: +1-800-228-3964 FAX: +1-408-922-0238 SALES OFFICES Northeast 301 Edgewater Place, Suite 210 Wakefield, MA 01880, U.S.A. Phone: +1-800-922-7667 FAX: +1-781-246-5443 EUROPE EPSON EUROPE ELECTRONICS GmbH HEADQUARTERS Riesstrasse 15 80992 Munich, GERMANY Phone: +49-89-14005-0 ...

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