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NCP1216P100G Datasheet(PDF) 2 Page - ON Semiconductor

Part # NCP1216P100G
Description  PWM Current-Mode Controller
Download  18 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP1216P100G Datasheet(HTML) 2 Page - ON Semiconductor

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NCP1216, NCP1216A
www.onsemi.com
2
Universal Input
Fosc = 35kHz
HV
Vcc
Drv
GND
Adj
FB
CS
NCP1216
EMI
Filter
1
2
3
45
6
7
8
Rsense
Rcomp
+
+
+
*See Application Section
Figure 1. Typical Application Example
PIN FUNCTION DESCRIPTION
Pin No.
Pin Name
Function
Pin Description
1
Adj
Adjust the Skipping Peak Current
This pin lets you adjust the level at which the cycle skipping process
takes place. Shorting this pin to ground, permanently disables the skip
cycle feature.
2
FB
Sets the Peak Current Setpoint
By connecting an Optocoupler to this pin, the peak current setpoint is
adjusted accordingly to the output power demand.
3
CS
Current Sense Input
This pin senses the primary current and routes it to the internal com-
parator via an L.E.B. By inserting a resistor in series with the pin, you
control the amount of ramp compensation you need.
4
GND
IC Ground
5
Drv
Driving Pulses
The driver’s output to an external MOSFET.
6
VCC
Supplies the IC
This pin is connected to an external bulk capacitor of typically 22 mF.
7
NC
This un−connected pin ensures adequate creepage distance.
8
HV
Generates the VCC from the Line
Connected to the high−voltage rail, this pin injects a constant current
into the VCC bulk capacitor.


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