tc7662a Microchip Technology Inc., tc7662a Datasheet
tc7662a
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tc7662a Summary of contents
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... EMI. In addition to a wider power supply input range (3V to 18V versus 1.5V to 10V for the TC7660), the TC7662A can source output currents as high as 40mA. The on-board oscillator operates at a nominal frequency of 12kHz. Operation ...
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... TC7662A Functional Block Diagram I 7 OSC + F/F C – Comparator with Hysteresis V REF DS21468B-page 2 Level Shift Q Q Level Shift Level Shift Level Shift TC7662A P SW1 2 + CAP + N SW4 C P EXT GND 3 + OUT SW2 EXT 4 – CAP SW3 5 V OUT 2002 Microchip Technology Inc. ...
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... JA IJA, MJA θ ............................................ 90°C/W JA Operating Temperature Range C Suffix............................................ 0°C to +70°C I Suffix .......................................... -25°C to +85°C E Suffix......................................... -40°C to +85°C M Suffix ...................................... -55°C to +125°C Storage Temperature Range.............. -65°C to +150°C TC7662A ELECTRICAL SPECIFICATIONS Electrical Characteristics 15V Symbol Parameter V Supply Voltage DD I ...
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... TC7662A 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE Pin No. (8-Pin PDIP, Symbol CERDIP connection Charge pump capacitor positive terminal. 3 GND Ground terminal Charge pump capacitor negative terminal Output voltage. OUT connection ...
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... L • When using polarized capacitors in the inverting R L mode, the + terminal OUT pin 2 of the TC7662A and the + terminal of C (-5V) must be connected to GND (pin 3). C 10µF R • If the voltage supply driving the TC7662A has a + large source impedance (25-30 ohms), then a 2.2µ ...
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... TC7662A 4.0 TYPICAL APPLICATIONS 4.1 Simple Negative Voltage Converter The majority of applications will undoubtedly utilize the TC7662A for generation of negative supply voltages. Figure 4-1 shows typical connections to provide a negative supply where a positive supply of +3V to +18V is available. FIGURE 4-1: SIMPLE NEGATIVE CONVERTER AND ITS OUTPUT EQUIVALENT ...
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... R OUT OUT , the half of 2 4.4 Cascading Devices The TC7662A may be cascaded as shown (Figure 4-4) to produce larger negative multiplication of the initial ) supply voltage. However, due to the finite efficiency OUT each device, the practical limit is 10 devices for light loads. The output voltage is defined by – ...
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... Changing the TC7662A Oscillator Frequency It is possible to increase the conversion efficiency of the TC7662A at low load levels by lowering the oscillator frequency. This reduces the switching losses, and is shown in Figure 4-5. However, lowering the oscillator frequency will cause an undesirable increase in the impedance of the pump (C ...
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... TC7662A Oscillator Frequency vs. C OSC T = +25 ° 100 1000 10,000 CAPACITANCE (pF 3mA 15V 20mA 100 120 140 TEMPERATURE (°C) = +25 ° ...
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... TC7662A 6.0 PACKAGING INFORMATION 6.1 Package Marking Information Package marking data not available at this time. 6.2 Package Dimensions 8-Pin Plastic DIP .045 (1.14) .030 (0.76) .400 (10.16) .348 (8.84) .200 (5.08) .140 (3.56) .150 (3.81) .115 (2.92) .110 (2.79) .090 (2.29) 8-Pin CDIP (Narrow) .110 (2.79) .090 (2.29) .055 (1.40) MAX. .400 (10.16) .370 (9.40) .200 (5.08) .160 (4.06) .200 (5.08) .125 (3.18) ...
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... The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products. 2002 Microchip Technology Inc. TC7662A DS21468B-page11 ...
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... TC7662A NOTES: DS21468B-page12 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. TC7662A Trademarks The Microchip name and logo, the Microchip logo, FilterLab microID, MPLAB, PIC, PICmicro, PICMASTER, ...
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... Palazzo Taurus Colleoni 1 20041 Agrate Brianza Milan, Italy Tel: 39-039-65791-1 Fax: 39-039-6899883 United Kingdom Arizona Microchip Technology Ltd. 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44 118 921 5869 Fax: 44-118 921-5820 03/01/02 ' !" ' 2002 Microchip Technology Inc. ...