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CA3524E 数据表(PDF) 11 Page - Intersil Corporation |
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CA3524E 数据表(HTML) 11 Page - Intersil Corporation |
11 / 16 page 11 CA1524, CA2524, CA3524 Applications (Note 1) A capacitor-diode output filter is used in Figure 19 to convert +15VDC to -5VDC at output currents up to 50mA. Since the output transistors have built-in current limiting, no additional current limiting is needed. Table 1 gives the required minimum input voltage and feedback resistor values, R2, for an output voltage. Capacitor-Diode Output Circuit A capacitor-diode output filter is used in Figure18 to convert +15VDC to -5VDC at output currents up to 50mA. Since the output transistors have built-in current limiting, no additional current limiting is needed. Table 1 gives the required minimum input voltage and feedback resistor values, R2, for an output voltage range of -0.5V to -20V with an output current of 40mA. Single-Ended Switching Regulator The CA1524 in the circuit of Figure 19 has both output stages connected in parallel to produce an effective 0% - 90% duty cycle. Transistor Q1 is pulsed on and off by these output stages. Regulation is achieved from the feedback provided by R1 and R2 to the error amplifier which adjusts the on-time of the output transistors according to the load current being drawn. Various output voltages can be obtained by adjusting R1 and R2. The use of an output inductor requires an R-C phase compensation network to stabilize the system. Current limiting is set at 1.9 amperes by the sense resistor R3. NOTE: 1. For additional information on the application of this device and a further explanation of the circuits below, see Intersil Application Note AN6915 “Application of the CA1524 series PWM lC”. FIGURE 18. CAPACITOR-DIODE OUTPUT CIRCUIT FIGURE 19. SINGLE-ENDED LC SWITCHING REGULATOR CIRCUIT 1 CA3524 1 1 2 1 16 1 6 1 7 1 3 1 10 1 12 1 11 1 13 1 14 1 4 1 5 1 9 1 8 1 6 +15V V+ 5K Ω 2K Ω 0.1 µF 5K Ω R1 5K Ω 0.01 µF 0.01 µF R2 15K Ω IN4001 IN4001 20 µF IN4001 50 µF -5V 20mA R1 = 5K Ω R2 = R1 ( | VO | + 2.5) (VREF - 2.5) 1 CA3524 1 1 2 1 16 1 6 1 7 1 3 1 10 1 12 1 11 1 13 1 14 1 4 1 5 1 9 1 8 1 15 +28V V+ 5K Ω 3K Ω 0.1 µF 5K Ω 0.02 µF 0.001 µF R2 5K Ω RURD410 V- 50K Ω 0.1 Ω 500 µF 0.9mH Q1 2N6388 2K Ω +5V IA R1 5K Ω |
类似零件编号 - CA3524E |
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类似说明 - CA3524E |
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