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CA1524E Fiches technique(PDF) 9 Page - Intersil Corporation |
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CA1524E Fiches technique(HTML) 9 Page - Intersil Corporation |
9 / 16 page 9 CA1524, CA2524, CA3524 Output Section The CA1524 series outputs are two identical n-p-n transistors with both collectors and emitters uncommitted. Each output transistor has antisaturation circuitry that enables a fast transient response for the wide range of oscillator frequencies. Current limiting of the output section is set at 100mA for each output and 100mA total if both outputs are paralleled. Having both emitters and collectors available provides the versatility to drive either n-p-n or p-n-p external transistors. Curves of the output saturation voltage as a function of temperature and output current are shown in Figures 8 and 9, respectively. There are a number of output configurations possible in the application of the CA1524 to voltage regulator circuits which fall into three basic classifications: 1. Capacitor-diode coupled voltage multipliers 2. Inductor-capacitor single-ended circuits 3. Transformer-coupled circuits FIGURE 9. TYPICAL OUTPUT SATURATION VOLTAGE AS A FUNCTION OF OUTPUT CURRENT Device Application Suggestions For higher currents, the circuit of Figure 10 may be used with an external p-n-p transistor and bias resistor. The internal regulator may be bypassed for operation from a fixed 5V supply by connecting both terminals 15 and 16 to the input voltage, which must not exceed 6V. FIGURE 10. CIRCUIT FOR EXPANDING THE REFERENCE CURRENT CAPABILITY The internal 5V reference can be used for conventional regu- lator applications if divided as shown in Figure 11. If the error amplifier is connected as a unity gain amplifier, a fixed duty cycle application results. FIGURE 11. ERROR AMPLIFIER BIASING CIRCUITS FIGURE 12. CIRCUIT TO ALLOW EXTERNAL BYPASS OF THE REFERENCE REGULATION To provide an expansion of the dead time without loading the oscillator, the circuit of Figure 13 may be used. FIGURE 13. CIRCUIT FOR EXPANSION OF DEAD TIME, WITH- OUT USING A CAPACITOR ON PIN 3 OR WHEN A LOW VALUE OSCILLATOR CAPACITOR IS USED 2.0 1.5 1.0 0.5 0 0 20 40 60 80 100 OUTPUT CURRENT, IL (mA) TA = +25 oC V+ = 8V to 40V CA1524 REFERENCE SECTION 15 16 8 V+ IL TO IA DEPENDING ON CHOICE FOR Q1 GND 100 Ω Q1 10 µF + - VREF VREF 2 1 R2 5K 5K R1 - + - + 2 1 R2 VREF GND GND 5K 5K NEGATIVE OUTPUT VOLTAGES POSITIVE OUTPUT VOLTAGES VO 2.5V (R1 + R2) R1 R1R2 R1 + R2 = 2.5KW R1 CA1524 REFERENCE SECTION 15 16 8 V+ CANNOT EXCEED 6V VT VREF NOTE: V+ Should Be in the 5V Range And Must Not Exceed 6V 8 16 9 5K Ω |
Numéro de pièce similaire - CA1524E |
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Description similaire - CA1524E |
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