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NCP1252APG Datasheet(PDF) 2 Page - ON Semiconductor |
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NCP1252APG Datasheet(HTML) 2 Page - ON Semiconductor |
2 / 18 page NCP1252 http://onsemi.com 2 Vout NCP1252 Vbulk Vcc 1 2 3 4 8 6 7 5 100 nF* *Minimum recommended decoupling capacitor value Figure 1. Typical Application Table 1. PIN FUNCTIONS Pin No. Pin Name Function Pin Description 1 FB Feedback This pin directly connects to an optocoupler collector. 2 BO Brown−out input This pin monitors the input voltage image to offer a Brown−out protection. 3 CS Current sense Monitors the primary current and allows the selection of the ramp com- pensation amplitude. 4 RT Timing element A resistor connected to ground fixes the switching frequency. 5 GND − The controller ground pin. 6 Drv Driver This pin connects to the MOSFET gate 7 VCC VCC This pin accepts voltage range from 8 V up to 28 V 8 SSTART Soft−start A capacitor connected to ground selects the soft−start duration. The soft start is grounded during the delay timer Table 2. MAXIMUM RATINGS TABLE (Notes 1 and 2) Symbol Rating Value Unit VCC Power Supply voltage, Vcc pin, transient voltage: 10 ms with IVcc < 20 mA 30 V VCC Power Supply voltage, Vcc pin, continuous voltage 28 V IVcc Maximum current injected into pin 7 20 mA Maximum voltage on low power pins (except pin 6, 7) −0.3 to 10 V RθJA – PDIP8 Thermal Resistance Junction−to−Air – PDIP8 131 °C/W RθJA – SOIC8 Thermal Resistance Junction−to−Air – SOIC8 169 °C/W TJMAX Maximum Junction Temperature 150 °C Storage Temperature Range −60 to +150 °C ESD Capability, HBM model 1.8 kV ESD Capability, Machine Model 200 V Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 1. This device series contains ESD protection and exceeds the following tests: Human Body Model 1800 V per JEDEC Standard JESD22−A114E. Machine Model Method 200 V per JEDEC Standard JESD22−A115A. 2. This device contains latch−up protection and exceeds 100 mA per JEDEC Standard JESD78. |
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