TC7660 Microchip Technology Inc., TC7660 Datasheet
TC7660
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TC7660 Summary of contents
Page 1
... The on-board oscillator operates at a nominal frequency of 10 kHz. Operation below 10 kHz (for lower supply current applications) is possible by connecting an external capacitor from OSC to ground. The TC7660 is available in 8-Pin PDIP, 8-Pin Small Outline (SOIC) and 8-Pin CERDIP packages in commercial and extended temperature ranges. + ...
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... GND are supplied to any input pin (+5V) TC7660 C 6 OSC OUT µF TC7660 Test Circuit 5V, Conditions T Max Open Max GND A L =20 mA +25°C A =20 mA, T +70°C (C Device) A =20 mA, T +85°C (E and I Device) A =20 mA, T +125° ...
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... FIGURE 2-5: vs. Temperature 10k FIGURE 2-6: Frequency vs. Temperature. TC7660 = 25°C. See Figure 1- OUT OUT +5V 100 1k 10k OSCILLATOR FREQUENCY (Hz) Power Conversion OUT + +5V -25 0 +25 +50 +75 +100 +125 ...
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... TC7660 Note: Unless otherwise indicated OPEN - 100 OUTPUT CURRENT (mA) FIGURE 2-7: Output Voltage vs. Output Current. 100 1.5 3.0 4.5 6.0 7.5 LOAD CURRENT (mA) FIGURE 2-8: Supply Current and Power Conversion Efficiency vs. Load Current. ...
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... Otherwise, the low voltage pin should be allowed to float. 3.6 Oscillator Control Input (OSC) The oscillator control input can be utilized to slow down or speed up the operation of the TC7660. Refer to Section 5.4, “Changing Frequency”, for details on altering the oscillator frequency. 3.7 Power Supply (V Positive power supply input voltage connection ...
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... FIGURE 4-1: Ideal Switched Capacitor Inverter. In this manner, the TC7660 performs a voltage inver- sion, but does not provide regulation. The average out- put voltage will drop in a linear manner with respect to load current. The equivalent circuit of the charge pump inverter can be modeled as an ideal voltage source in series with a resistor, as shown in Figure 4-2 ...
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... C connected in parallel µF + 5.3 Cascading Devices A larger negative multiplication of the initial supply volt- age can be obtained by cascading multiple TC7660 devices. The output voltage and the output resistance will both increase by approximately a factor of n, where n is the number of devices cascaded. EQUATION ...
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... FIGURE 5-5: Lowering Oscillator Frequency. DS21465B-page 8 5.5 Positive Voltage Multiplication Positive voltage multiplication can be obtained by employing two external diodes (Figure 5-6). Refer to the theory of operation of the TC7660 (Section 4.1). During the half cycle when switch S tor C of Figure 5-6 is charged voltage where ...
Page 9
... Figure 5-8 shows a TC7660 transforming -5V to +5V (or +5V to +10V, etc.). The only problem here is that the internal clock and switch-drive section will not operate until some positive voltage has been generated. An ini- tial inefficient pump, as shown in Figure 5-7, could be ...
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... Standard marking consists of Microchip part number, year code, week code, traceability code (facility code, mask rev#, and assembly code). For marking beyond this, certain price adders apply. Please check with your Microchip Sales Office. DS21465B-page 10 Example: TC7660 CPA061 0221 Example: TC7660 MJA061 0221 Example: TC7660 COA0221 061 2002 Microchip Technology Inc. ...
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... A2 .115 .130 .145 A1 .015 E .300 .313 .325 E1 .240 .250 .260 D .360 .373 .385 L .125 .130 .135 c .008 .012 .015 B1 .045 .058 .070 B .014 .018 .022 § eB .310 .370 .430 TC7660 MILLIMETERS MIN NOM MAX 8 2.54 3.56 3.94 4.32 2.92 3.30 3.68 0.38 7.62 7.94 8.26 6.10 6.35 6.60 9.14 9.46 9.78 3.18 3.30 3.43 0.20 0.29 0.38 1.14 1.46 1.78 0.36 0.46 0.56 7.87 9.40 10. ...
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... TC7660 8-Lead Ceramic Dual In-line – 300 mil (CERDIP) Packaging diagram not available at this time. DS21465B-page 12 2002 Microchip Technology Inc. ...
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... A2 .052 .056 .061 A1 .004 .007 .010 E .228 .237 .244 E1 .146 .154 .157 D .189 .193 .197 h .010 .015 .020 L .019 .025 .030 .008 .009 .010 B .013 .017 .020 TC7660 A2 MILLIMETERS MIN NOM MAX 8 1.27 1.35 1.55 1.75 1.32 1.42 1.55 0.10 0.18 0.25 5.79 6.02 6.20 3.71 3.91 3.99 4.80 4.90 5.00 0.25 0.38 0.51 0.48 0.62 0. 0.20 0.23 0.25 0.33 0.42 0. ...
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... TC7660 NOTES: DS21465B-page 14 2002 Microchip Technology Inc. ...
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... TC7660COA713:Tape and Reel, Commercial Temp., SOIC package. c) TC7660CPA: Commercial Temp., PDIP package. d) TC7660EOA: Extended Temp., SOIC package. e) TC7660EOA713: Tape and Reel, Extended Temp., SOIC package. f) TC7660EPA: Extended Temp., PDIP package. g) TC7660IJA: Industrial Temp., CERDIP package h) TC7660MJA: Military Temp., CERDIP package. ...
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... TC7660 NOTES: DS21465B-page 16 2002 Microchip Technology Inc. ...
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... Microchip. No licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. 2002 Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, K MPLAB, PIC, PICmicro, PICSTART and PRO MATE are registered trademarks of Microchip Technology Incorporated in the U ...
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... Centro Direzionale Colleoni Palazzo Taurus Colleoni 1 20041 Agrate Brianza Milan, Italy Tel: 39-039-65791-1 Fax: 39-039-6899883 United Kingdom Microchip Ltd. 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44 118 921 5869 Fax: 44-118 921-5820 11/15/02 2002 Microchip Technology Inc. ...