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SG3525A Datasheet(PDF) 3 Page - ON Semiconductor |
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SG3525A Datasheet(HTML) 3 Page - ON Semiconductor |
3 / 10 page SG3525A http://onsemi.com 3 MAXIMUM RATINGS Rating Symbol Value Unit Supply Voltage VCC +40 Vdc Collector Supply Voltage VC +40 Vdc Logic Inputs −0.3 to +5.5 V Analog Inputs −0.3 to VCC V Output Current, Source or Sink IO ±500 mA Reference Output Current Iref 50 mA Oscillator Charging Current 5.0 mA Power Dissipation TA = +25°C (Note 1) TC = +25°C (Note 2) PD 1000 2000 mW Thermal Resistance, Junction−to−Air RqJA 100 °C/W Thermal Resistance, Junction−to−Case RqJC 60 °C/W Operating Junction Temperature TJ +150 °C Storage Temperature Range Tstg −55 to +125 °C Lead Temperature (Soldering, 10 seconds) TSolder +300 °C Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. 1. Derate at 10 mW/ °C for ambient temperatures above +50°C. 2. Derate at 16 mW/ °C for case temperatures above +25°C. RECOMMENDED OPERATING CONDITIONS Characteristics Symbol Min Max Unit Supply Voltage VCC 8.0 35 Vdc Collector Supply Voltage VC 4.5 35 Vdc Output Sink/Source Current (Steady State) (Peak) IO 0 0 ±100 ±400 mA Reference Load Current Iref 0 20 mA Oscillator Frequency Range fosc 0.1 400 kHz Oscillator Timing Resistor RT 2.0 150 k W Oscillator Timing Capacitor CT 0.001 0.2 mF Deadtime Resistor Range RD 0 500 W Operating Ambient Temperature Range TA 0 +70 °C APPLICATION INFORMATION Shutdown Options (See Block Diagram, page 2) Since both the compensation and soft−start terminals (Pins 9 and 8) have current source pull−ups, either can readily accept a pull−down signal which only has to sink a maximum of 100 mA to turn off the outputs. This is subject to the added requirement of discharging whatever external capacitance may be attached to these pins. An alternate approach is the use of the shutdown circuitry of Pin 10 which has been improved to enhance the available shutdown options. Activating this circuit by applying a positive signal on Pin 10 performs two functions: the PWM latch is immediately set providing the fastest turn−off signal to the outputs; and a 150 mA current sink begins to discharge the external soft−start capacitor. If the shutdown command is short, the PWM signal is terminated without significant discharge of the soft−start capacitor, thus, allowing, for example, a convenient implementation of pulse−by−pulse current limiting. Holding Pin 10 high for a longer duration, however, will ultimately discharge this external capacitor, recycling slow turn−on upon release. Pin 10 should not be left floating as noise pickup could conceivably interrupt normal operation. |
Número de pieza similar - SG3525A_05 |
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Descripción similar - SG3525A_05 |
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