Datasheet

NCP1216, NCP1216A
http://onsemi.com
5
ELECTRICAL CHARACTERISTICS (continued) (For typical values T
J
= 25°C, for min/max values T
J
= 0°C to +125°C, Maximum
T
J
= 150°C, V
CC
= 11 V unless otherwise noted.)
Characteristic
Pin Symbol Min Typ Max Unit
INTERNAL OSCILLATOR (V
CC
= 11 V, Pin 5 Loaded by 1.0 kW)
Oscillation Frequency, 65 kHz Version f
OSC
58.5 65 71.5 kHz
Oscillation Frequency, 100 kHz Version f
OSC
90 100 110 kHz
Oscillation Frequency, 133 kHz Version f
OSC
120 133 146 kHz
Built−in Frequency Jittering in Percentage of f
OSC
f
jitter
±4.0 %
Maximum Duty−Cycle NCP1216
NCP1216A
D
max
69
42
75
46.5
81
50
%
FEEDBACK SECTION (V
CC
= 11 V, Pin 5 Loaded by 1.0 kW)
Internal Pullup Resistor 2 R
up
20
kW
Pin 2 (FB) to Internal Current Setpoint Division Ratio − I
ratio
3.3
SKIP CYCLE GENERATION
Default Skip Mode Level 1 V
skip
0.9 1.1 1.26 V
Pin 1 Internal Output Impedance 1 Z
out
25
kW
INTERNAL RAMP COMPENSATION
Internal Ramp Level @ 25°C (Note 4) 3 V
ramp
2.6 2.9 3.2 V
Internal Ramp Resistance to C
S
Pin 3 R
ramp
19
kW
4. A 1.0 MW resistor is connected to the ground for the measurement.