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NCP3163 Datasheet(PDF) 2 Page - ON Semiconductor |
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NCP3163 Datasheet(HTML) 2 Page - ON Semiconductor |
2 / 20 page NCP3163, NCV3163 http://onsemi.com 2 16 9 10 11 12 13 14 15 8 7 6 5 4 3 2 LVI Oscillator + + − Current Limit Figure 2. Representative Block Diagram (Bottom View) − + + + − 1 VCC VCC VCC Thermal R S Q Driver Collector Switch Collector 0.25 V Switch Emitter Bootstrap Input Voltage Feedback 1 Voltage Feedback 2 LVI Output Gnd IPKsense VCC RSC Timing Capacitor 2.0 mA 7.0 V 60 Q1 Q2 1.125 V 15 k 1.25 V Feedback Comparator Shutdown CT RDT 45 k Latch + − = Sink Only Positive True Logic PIN FUNCTION DESCRIPTION SOIC16 DFN18 PIN NAME DESCRIPTION 1 15 LVI Output This pin will sink current when FB1 and FB2 are less than the LVI threshold (Vth). 2 16 Voltage Feedback 2 Connecting this pin to a resistor divider off of the output will regulate the application according to the Vout design equation in Figure 22. 3 17 Voltage Feedback 1 Connecting this pin directly to the output will regulate the device to 5.05 V. 4 18 GND Ground pin for all internal circuits and power switch. 6 1 Timing Capacitor Connect a capacitor to this pin to set the frequency. The addition of a parallel resis- tor will decrease the maximum duty cycle and increase the frequency. 7 3 VCC Power pin for the IC. 8 4 Ipk Sense When (VCC−VIPKsense) > 250 mV the circuit resets the output driver on a pulse by pulse basis. 9 5 Drive Collector Voltage driver collector 10,11 6,7,8,9 Switch Collector Internal switch transistor collector 14,15 10,11,12,13 Switch Emitter Internal switch transistor emitter 16 14 Bootstrap Input Connect this pin to VCC for operation at low VCC levels. For some topologies, a series resistor and capacitor can be utilized to improve the converter efficiency. 5,12,13 2 No Connect These pins have no connection. Exposed Pad Exposed Pad Exposed Pad The exposed pad beneath the package must be connected to GND (pin 4). Addi- tionally, using proper layout techniques, the exposed pad can greatly enhance the power dissipation capabilities of the NCP3163. |
Similar Part No. - NCP3163_07 |
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Similar Description - NCP3163_07 |
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