NCP1239
ELECTRICAL CHARACTERISTICS (For typical values T = 25°C, for min/max values T = 0°C to +125°C, V
= 48 V,
J
J
pin16
V
= 20 V unless otherwise noted.)
CC
Symbol
Soft−Start and Timer
Soft−Start or Jittering charge current @ V
Rating
Pin
Min
Typ
Max
Unit
I
= 2.4 V
6
6
6
6
6
6
6
60
77
95
107
1.80
3.00
4.3
110
137
1.89
3.20
4.6
6.4
−
ꢁ A
ꢁ A
V
ch
pin6
I
Jittering Discharge Current @ V
= 2.4 V
pin6
disch
V
Jittering Saw−Tooth Lower Threshold
Jittering Saw−Tooth Upper Threshold
Timer Peak Threshold
1.67
2.85
4.0
3.9
−
jitter
V
H
V
jitter
V
L
V
timer
I
I
Timer Charge Current @ V
= 3.5 V and Pin 8 open
pin6
5.2
ꢁ A
ꢁ A
timerC
timerD
Timer Discharge Current @ V
= 3.5 V and Pin 8 open
400
pin6
Feedback Section
Rup
Ifb
Internal Pullup Resistor
Source Current @ V
8
8
−
−
−
−
20
200
3.0
−
−
−
kꢂ
= 0.5 V
ꢁ A
pin8
Iratio
Pin 8 to current Setpoint division ratio
−
Internal Ramp Compensation
R
Internal Resistor
10
10
−
−
32
−
−
k
ꢂ
ramp
V
ramp
Internal Saw−Tooth Amplitude
3.2
V
Skipping Mode and Standby Management
Rgts
Pin 1 output impedance in standby state
(Pin 8 grounded, V > 4.5 V) @ V = 12.5 V
1
1
7
7
4.0
0.6
380
8.0
1.0
430
18
−
k
ꢂ
pin6
CC
Igts
Sink Current Source in Normal Mode
@ V = 2 V, Pin 7 open @ V − V =0.7 V
pin1
mA
mV
pin8
CC
FB−skip
FB_stby−out
Default Feedback Level for Skip−Cycle Operation and Standby
Detection
480
Default Feedback Level to Leave Standby
Ratio leave standby Setpoint to skip−cycle Setpoint
Internal Pin 7 Impedance
650
1.5
−
740
1.7
110
3.0
810
1.9
−
mV
−
V
/V
stby−out skip
R
pin7
7
kꢂ
Pin 7 to Skipping Setpoint ratio
−
−
−
Brown−Out Detection
BO
Brown−Out Detection Upper Threshold
Brown−Out Detection Low Threshold
Brown−Out Hysteresis
5
5
5
0.45
0.20
0.20
0.50
0.24
0.26
0.55
0.28
0.30
V
V
V
thH
thL
BO
BO
hyst
Protections
TSD
Thermal Shutdown:
Thermal Shutdown Threshold
Hysteresis
°C
140
30
Vfault
Fault Detection Threshold
3
2.2
2.4
2.6
V
ORDERING INFORMATION
Device
†
Package
Shipping
NCP1239FDR2
SOIC−16
2500 / Tape & Reel
2500 / Tape & Reel
NCP1239FDR2G
SOIC−16
(Pb−Free)
NCP1239VDR2
SOIC−16
2500 / Tape & Reel
2500 / Tape & Reel
NCP1239VDR2G
SOIC−16
(Pb−Free)
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
http://onsemi.com
5
ONSEMI [ ONSEMI ]
