Datasheet SG3525A (ON Semiconductor) - 3
| Manufacturer | ON Semiconductor |
| Description | PWM Controller |
| Pages / Page | 10 / 3 — SG3525A. MAXIMUM RATINGS. Rating. Symbol. Value. Unit. RECOMMENDED … |
| File Format / Size | PDF / 384 Kb |
| Document Language | English |
SG3525A. MAXIMUM RATINGS. Rating. Symbol. Value. Unit. RECOMMENDED OPERATING CONDITIONS. Characteristics. Min. Max. APPLICATION INFORMATION
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SG3525A 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 PD mW TA = +25C (Note 1) 1000 TC = +25C (Note 2) 2000 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 Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. Derate at 10 mW/C for ambient temperatures above +50C. 2. Derate at 16 mW/C for case temperatures above +25C.
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 IO mA (Steady State) 0 100 (Peak) 0 400 Reference Load Current Iref 0 20 mA Oscillator Frequency Range fosc 0.1 400 kHz Oscillator Timing Resistor RT 2.0 150 kW Oscillator Timing Capacitor CT 0.001 0.2 mF Deadtime Resistor Range RD 0 500 W Operating Ambient Temperature Range TA 0 +70 C Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability.
APPLICATION INFORMATION Shutdown Options
(See Block Diagram, page 2) latch is immediately set providing the fastest turn−off signal Since both the compensation and soft−start terminals to the outputs; and a 150 mA current sink begins to discharge (Pins 9 and 8) have current source pull−ups, either can the external soft−start capacitor. If the shutdown command readily accept a pull−down signal which only has to sink a is short, the PWM signal is terminated without significant maximum of 100 mA to turn off the outputs. This is subject discharge of the soft−start capacitor, thus, allowing, for to the added requirement of discharging whatever external example, a convenient implementation of pulse−by−pulse capacitance may be attached to these pins. current limiting. Holding Pin 10 high for a longer duration, An alternate approach is the use of the shutdown circuitry however, will ultimately discharge this external capacitor, of Pin 10 which has been improved to enhance the available recycling slow turn−on upon release. shutdown options. Activating this circuit by applying a Pin 10 should not be left floating as noise pickup could positive signal on Pin 10 performs two functions: the PWM conceivably interrupt normal operation.
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SG3525A 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 PD mW TA = +25C (Note 1) 1000 TC = +25C (Note 2) 2000 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 Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. Derate at 10 mW/C for ambient temperatures above +50C. 2. Derate at 16 mW/C for case temperatures above +25C.
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 IO mA (Steady State) 0 100 (Peak) 0 400 Reference Load Current Iref 0 20 mA Oscillator Frequency Range fosc 0.1 400 kHz Oscillator Timing Resistor RT 2.0 150 kW Oscillator Timing Capacitor CT 0.001 0.2 mF Deadtime Resistor Range RD 0 500 W Operating Ambient Temperature Range TA 0 +70 C Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability.
APPLICATION INFORMATION Shutdown Options
(See Block Diagram, page 2) latch is immediately set providing the fastest turn−off signal Since both the compensation and soft−start terminals to the outputs; and a 150 mA current sink begins to discharge (Pins 9 and 8) have current source pull−ups, either can the external soft−start capacitor. If the shutdown command readily accept a pull−down signal which only has to sink a is short, the PWM signal is terminated without significant maximum of 100 mA to turn off the outputs. This is subject discharge of the soft−start capacitor, thus, allowing, for to the added requirement of discharging whatever external example, a convenient implementation of pulse−by−pulse capacitance may be attached to these pins. current limiting. Holding Pin 10 high for a longer duration, An alternate approach is the use of the shutdown circuitry however, will ultimately discharge this external capacitor, of Pin 10 which has been improved to enhance the available recycling slow turn−on upon release. shutdown options. Activating this circuit by applying a Pin 10 should not be left floating as noise pickup could positive signal on Pin 10 performs two functions: the PWM conceivably interrupt normal operation.
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