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NCP1239 Datasheet(PDF) 5 Page - ON Semiconductor

Part No. NCP1239
Description  Low−Standby High Performance PWM Controller
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP1239 Datasheet(HTML) 5 Page - ON Semiconductor

 
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NCP1239
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ELECTRICAL CHARACTERISTICS (For typical values TJ = 25°C, for min/max values TJ = 0°C to +125°C, Vpin16 = 48 V,
VCC = 20 V unless otherwise noted.)
Symbol
Unit
Max
Typ
Min
Pin
Rating
Soft−Start and Timer
Ich
Soft−Start or Jittering charge current @ Vpin6 = 2.4 V
6
60
95
110
mA
Idisch
Jittering Discharge Current @ Vpin6 = 2.4 V
6
77
107
137
mA
Vjitter
Jittering Saw−Tooth Lower Threshold
6
1.67
1.80
1.89
V
VjitterH
Jittering Saw−Tooth Upper Threshold
6
2.85
3.00
3.20
V
VtimerL
Timer Peak Threshold
6
4.0
4.3
4.6
V
ItimerC
Timer Charge Current @ Vpin6 = 3.5 V and Pin 8 open
6
3.9
5.2
6.4
mA
ItimerD
Timer Discharge Current @ Vpin6 = 3.5 V and Pin 8 open
6
400
mA
Feedback Section
Rup
Internal Pullup Resistor
8
20
k
W
Ifb
Source Current @ Vpin8 = 0.5 V
8
200
mA
Iratio
Pin 8 to current Setpoint division ratio
3.0
Internal Ramp Compensation
Rramp
Internal Resistor
10
32
k
W
Vramp
Internal Saw−Tooth Amplitude
10
3.2
V
Skipping Mode and Standby Management
Rgts
Pin 1 output impedance in standby state
(Pin 8 grounded, Vpin6 > 4.5 V) @ VCC = 12.5 V
1
4.0
8.0
18
k
W
Igts
Sink Current Source in Normal Mode
@ Vpin8 = 2 V, Pin 7 open @ VCC − Vpin1=0.7 V
1
0.6
1.0
mA
FB−skip
Default Feedback Level for Skip−Cycle Operation and Standby
Detection
7
380
430
480
mV
FB_stby−out
Default Feedback Level to Leave Standby
7
650
740
810
mV
Vstby−out/Vskip
Ratio leave standby Setpoint to skip−cycle Setpoint
1.5
1.7
1.9
Rpin7
Internal Pin 7 Impedance
7
110
k
W
Pin 7 to Skipping Setpoint ratio
3.0
Brown−Out Detection
BOthH
Brown−Out Detection Upper Threshold
5
0.45
0.50
0.55
V
BOthL
Brown−Out Detection Low Threshold
5
0.20
0.24
0.28
V
BOhyst
Brown−Out Hysteresis
5
0.20
0.26
0.30
V
Protections
TSD
Thermal Shutdown:
Thermal Shutdown Threshold
Hysteresis
140
30
°C
Vfault
Fault Detection Threshold
3
2.2
2.4
2.6
V
ORDERING INFORMATION
Device
Package
Shipping
NCP1239FDR2
SOIC−16
2500 / Tape & Reel
NCP1239FDR2G
SOIC−16
(Pb−Free)
2500 / Tape & Reel
NCP1239VDR2
SOIC−16
2500 / Tape & Reel
NCP1239VDR2G
SOIC−16
(Pb−Free)
2500 / Tape & Reel
†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.


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