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NCP1511 Fiches technique(PDF) 2 Page - ON Semiconductor |
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NCP1511 Fiches technique(HTML) 2 Page - ON Semiconductor |
2 / 16 page NCP1511 http://onsemi.com 2 Figure 3. Simplified Block Diagram + − − + + − + − + − + − FB GNDA CB0 CB1 SHD ISENS ISENS SENFET ILIM ZCL MODE SELECTION SYNC DETECT AND TIMING BLOCK SYNC DETECT AND TIMING BLOCK THERMAL SHUTDOWN ENABLE DETECT SELECT LOGIC BANDGAP REFERENCE AND SOFT START PWM OVP PM CMP CMP CMP CMP CMP OA Q2 Q1 DVR DVR COMPENSATION RAMP CONTROL BLOCK (PWM,PM) GNDP SYNC LX VCC FB DAMPING SWITCHING CONTROL DAMPING SWITCHING CONTROL PIN FUNCTION DESCRIPTION Pin No. Symbol Type Description A1 GNDP Power Ground Ground Connection for the NFET Power Stage. A2 LX Analog Output Connection from Power Pass Elements to the Inductor. A3 VCC Analog Input Power Supply Input for Power and Analog VCC. B1 SYNC Analog Input Synchronization input for the PWM converter. If a clock signal is present, the converter uses the rising edge for the turn on. If this pin is low, the converter is in the Pulsed mode. If this pin is high, the converter uses the internal oscillator for the PWM mode. This pin contains an internal pull down resistor. B2 GNDA Analog Ground Ground connection for the Analog Section of the IC. This is the GND for the FB, Ref, Sync, CB, and SHD pins. B3 FB Analog Input Feedback Voltage from the Output of the Power Supply. C1 SHD Analog Input Enable for Switching Regulator. This Pin is Active High to enable the NCP1511. The SHD Pin has an internal pull down resistor to force the converter off if this pin is not connected to the external circuit. C2 CB1 Analog Input Selects Vout. This pin contains an internal pull up resistor. C3 CB0 Analog Input Selects Vout. This pin contains an internal pull down resistor. |
Numéro de pièce similaire - NCP1511 |
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Description similaire - NCP1511 |
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