NCP1216 ON, NCP1216 Datasheet - Page 2
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NCP1216
Manufacturer Part Number
NCP1216
Description
PWM Current-Mode Controller for High-Power Universal Off-Line Supplies
Manufacturer
ON
Datasheet
1.NCP1216.pdf
(18 pages)
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PIN FUNCTION DESCRIPTION
Universal Input
Pin No.
1
2
3
4
5
6
7
8
Pin Name
Filter
EMI
GND
V
Drv
Adj
CS
NC
HV
FB
CC
Adjust the Skipping Peak Current
Generates the V
Sets the Peak Current Setpoint
Current Sense Input
Supplies the IC
+
Driving Pulses
IC Ground
Function
Figure 1. Typical Application Example
−
CC
from the Line
*See Application Section
NCP1216, NCP1216A
1
2
3
4
Fosc = 35kHz
http://onsemi.com
NCP1216
Adj
FB
CS
GND
Vcc
Drv
HV
R
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.
By connecting an Optocoupler to this pin, the peak current setpoint is
adjusted accordingly to the output power demand.
This pin senses the primary current and routes it to the internal
comparator via an L.E.B. By inserting a resistor in series with the pin,
you control the amount of ramp compensation you need.
The driver’s output to an external MOSFET.
This pin is connected to an external bulk capacitor of typically 22 mF.
This un−connected pin ensures adequate creepage distance.
Connected to the high−voltage rail, this pin injects a constant current
into the V
comp
2
8
7
6
5
CC
+
bulk capacitor.
R
sense
Pin Description
−
+