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S1F76540M0C Series
Technical Manual
Rev.1.1

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   Summary of Contents for Epson S1F76540M0C Series

  • Page 1

    S1F76540M0C Series Technical Manual Rev.1.1...

  • Page 2

    Seiko Epson. Seiko Epson reserves the right to make changes to this material without notice. Seiko Epson does not assume any liability of any kind arising out of any inaccuracies contained in this material or due to its application or use in any product or circuit and, further, there is no representation that this material is applicable to products requiring high level reliability, such as, medical products.

  • Page 3: Table Of Contents

    9.7 Parallel Connection (Boosting Capacity Increase)...............25 9.8 High-Magnification Boosting Using a Diode .................26 9.8.1 Quintuple Boosting + Regulator ..................26 9.8.2 Sextuple Boosting + Regulator....................28 9.9 Positive Voltage Converter .....................30 9.10 Connection Example when Changing the Regulator Temperature Coefficient....32 S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 4: Description

    • Adding external parts enables quintuple or more high-magnification booster and regulator. • Power-off function by external signal • Completely-self-contained oscillation circuit • Compact and slim package product (SSOP2-16PIN) • This IC is not designed for strong radiation activity proof. S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 5: Block Diagram

    Reference control circuit circuit voltage circuit POFF2X Boost control Voltage Clock circuit stabilizer generator Voltage converter C1P C1N C3N C2P C2N Figure 2.1 Block Diagram 3. PIN ASSIGNMENT POFF1X POFF2X Figure 3.1 Pin assignment EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 6: Pin Description

    Positive connect pin for double and quadruple boosting capacitor Negative connect pin for double boosting capacitor Negative connect pin for quadruple boosting capacitor Negative connect pin for 3rd boosting capacitor Positive connect pin for 3rd boosting capacitor S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 7: Functional Description

    For information about how to define and roughly estimate the output ripple value, see 9.4. Quadruple boosting Ta=25°C Io=10mA (Tantalum capacitor) VI=-3V FC=Low VI=-5V FC=Low VI=-3V FC=High VI=-5V FC=High C[µF] Figure 5.1 Capacitor capacity value - output impedance characteristics diagram EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 8: Voltage Converter

    [Notes on connecting the capacitor for voltage conversion] When connecting the capacitor to the C1P, C2P, C1N, C2N, C3N, and VO pins, place the capacitor near this IC so that the cable is as short as possible. S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 9: Reference Voltage Circuit

    (0°C) | × CT = (25°C) | 50°C - 0°C (Note on switching the TC1 and TC2 pins) When switching the TC1 and TC2 pins after power-on, be sure to turn the power off (POFF1X=POFF2X=VI). EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 10: Voltage Stabilizer

    R1+R2 = 18V ÷ 20µA = 900kΩ If the reference voltage is -1.5V, the following ratio of the split resistances will be obtained from expression (5.1). (R1+R2) ÷ R1 = (-18V) ÷ (-1.5V) = 12 S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 11

    RV 220pF • Serial equivalent resistance of output capacitor CO 10Ω or more (Note 1) (Note 1) Specify the minimum necessary value because the ripple value of the output voltage increases. (See item 9.4.) EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 12: Power-off Control Circuit

    Before starting the power-off function with an external system signal, check that VI has been stabilized after power-on. Turning the power on or off before the power is not stabilized will result in a permanent destruction of this IC. POFF1X POFF1X POFF2X POFF2X Figure 5.4 Power-off control start timing S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 13: Soft Start Circuit

    To stabilize the input voltage VI, the capacitor (CI) to be connected between the V and VI pins must be placed near the IC pin so that the wiring is as short as possible. EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 14: Absolute Maximum Ratings

    =0V; therefore, be aware of the potential relation when connecting to an external system. S1F76540 side System side (+5V) (0V) GND(0V) VI(−5V) −10V Double boosting −15V 3rd boosting −20V Quadruple boosting Figure 6.1 Electric potential relation diagram S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 15: Electrical Characteristics Measurement Standard

    RRV = 1M Ω consumption current µ A Static current POFF1X = VI 、 POFF2X = VI 、 FC = V Applied pins: POFF1X, POFF2X, FC, µ A Input leak current ILKI TC1, and TC2 EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 16

    ∆I (VRI=-20V) − V (VRI=10V) ∆VR = (Note 2) ∆VRI × V (VRI=-10V) ∆VO = =20mA) − V =0mA) (Note 3) (Ta=50°C)| − |V (Ta=25°C) | (Ta=0°C) (Note 4) CT = 50°C − 0°C S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 17: Ac Characteristics

    Applied pin: C1P Ta=25 ° C FC = VI 12.0 16.0 20.0 POFF1X = VI Internal clock frequency 2 Ta= − 40 ° C to + 85 ° C POFF2X= V 16.0 24.0 Applied pin: C1P EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 18: Characteristics Graphs

    3rd boosting Ta=25°C Ta=25°C Double boosting =-3V =-5V Double boosting to C =10µF to C =10µF Io[mA] Io[mA] (3) Boosting output (Vo) - Output current <1> (4) Boosting voltage (Vo) - Output current <2> S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 19

    =10µF Io [mA] Io[mA] (7) Boosting power conversion efficiency - (8) Boosting power conversion efficiency - Output current <1> Output current <2> Input current - Output current <1> Input current - Output current <2> EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 20

    7.96 =-8V 7.95 7.94 7.93 7.92 Ta=25°C Ta=25°C 7.91 to C =10µF =-20V 7.90 10.0 100.0 [mA] Io[mA] (11) Output voltage lowering - Load current (12) Output voltage (V ) - Output current <1> S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 21

    [mA] [mA] (13) Output voltage (V ) - Output current <2> (14) Output voltage (V ) - Output current <3> Ta[°C] Ta[°C] (15) Reference voltage - Temperature gradient (16) Regulator temperature coefficient - Temperature EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 22: Reference: External Connection Examples

    Other setting conditions (1) When using the high output mode Connect the FC pin to VI. (2) When changing the temperature coefficient CT Change the TC1 and TC2 pins as shown in Table 5.3. S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 23: 3rd Boosting + Regulator

    Other setting conditions (1) When using the high output mode Connect the FC pin to VI. (2) When changing the temperature coefficient CT Change the TC1 and TC2 pins as shown in Table 5.3. EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 24: Double Boosting + Regulator

    Other setting conditions (1) When using the high output mode Connect the FC pin to VI. (2) When changing the temperature coefficient CT Change the TC1 and TC2 pins as shown in Table 5.3. S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 25: Quadruple Boosting

    Expression (9.1) VRP= 2・fCL・CO Load current (A) Clock frequency (Hz) Serial equivalent resistance (Ω) of output capacitor CO Other setting conditions (1) When using the high output mode Connect the FC pin to VI. EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 26: 3rd Boosting

    Set the POFF2X pin to level LOW (VI); all circuits will be turned off. About ripple voltage For ripple voltage, see Section 9.4. Other setting conditions (1) When using the high output mode Connect the FC pin to VI. S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 27: Double Boosting

    Set the POFF2X pin to level LOW (VI); all circuits will be turned off. About ripple voltage For ripple voltage, see Section 9.4. Other setting conditions (1) When using the high output mode Connect the FC pin to VI. EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 28: Parallel Connection (boosting Capacity Increase)

    (1) When using the high output mode Connect the FC pin in the master IC to VI. (2) When changing the temperature coefficient CT Change the TC1 and TC2 pins in the slave IC as shown in Table 5.3. S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 29: High-magnification Boosting Using A Diode

    Figure 9.9 Quintuple boosting connection example using one diode Figure 9.9 Setting conditions Internal clock ON (Low output mode) Booster Regulator ON (Select CT0 = -0.05%/°C.) 5VI-VF Figure 9.10 Quintuple-boosting potential relation using one diode EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 30

    Other setting conditions (1) When using the high output mode Connect the FC pin to VI. (2) When changing the temperature coefficient CT Change the TC1 and TC2 pins as shown in Table 5.3. S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 31: Sextuple Boosting + Regulator

    Figure 9.11 Sextuple boosting connection example using two diodes Figure 9.11 Setting conditions Internal clock ON (Low output mode) Booster Regulator ON (Select CT0 = -0.05%/°C.) 6VI −(2×VF) VO’ 2×VF Figure 9.12 Sextuple-boosting potential relation using two diodes EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 32

    Other setting conditions (1) When using the high output mode Connect the FC pin to VI. (2) When changing the temperature coefficient CT Change the TC1 and TC2 pins as shown in Table 5.3. S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 33: Positive Voltage Converter

    Figure 9.13 Positive voltage conversion connection example (3rd boosting) Figure 9.14 Setting conditions Internal clock ON (Low output mode) Booster Regulator 3×VF VO’ 3VI− (3×VF) Figure 9.14 Electric potential relation diagram of positive voltage conversion connection example (3rd boosting) EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 34

    For positive voltage conversion, the input voltage rating is equal to for the negative double-boosting. (See Table 7.1.) Other setting conditions (1) When using the high output mode Connect the FC pin to VI. S1F76540M0C Series Technical Manual EPSON (Rev.1.1)

  • Page 35: Connection Example When Changing The Regulator Temperature Coefficient

    The temperature characteristics of the thermistor resistor RT indicate the nonlinearity. When compensating the linear characteristics, insert the RP shown in Figure 9.15. Other setting conditions (1) When using the high output mode Connect the FC pin to VI. EPSON S1F76540M0C Series Technical Manual (Rev.1.1)

  • Page 36

    20/F, Harbour Centre, 25 Harbour Road, Wanchai, Hong Kong Phone: +852-2585-4600 FAX: +852-2827-4346 Telex: 65542 EPSCO HX EPSON TAIWAN TECHNOLOGY & TRADING LTD. 14F, No. 7, Song Ren Road, Taipei 110, TAIWAN Phone: +886-2-8786-6688 FAX: +886-2-8786-6660 EPSON SINGAPORE PTE., LTD.

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