NCP1239
www.onsemi.com
25
SOFT-START
Soft-start is achieved by ramping up an internal reference,
V
SSTART
, and comparing it to current sense signal. V
SSTART
ramps up from 0 V once the controller powers up. The
setpoint rise is then limited by the V
SSTART
ramp so that a
gradual increase of the power switch current during start-up.
The soft-start duration (that is, the time necessary for the
ramp to reach the V
ILIM1
steady state current limit), t
SSTART
,
is typically 8 ms.
DRIVER
The NCP1239 maximum supply voltage, V
CC(max)
, is
25.5 V (32.0 V for F and J versions). Typical high-voltage
MOSFETs have a maximum gate-source voltage rating of
20 V. The DRV pin incorporates an active voltage clamp to
limit the gate voltage on the external MOSFETs. The DRV
voltage clamp, V
DRV(high)
is typically 13.5 V with a
maximum limit of 16 V.
THERMAL SHUTDOWN
An internal thermal shutdown circuit monitors the
junction temperature of the IC. The controller is disabled if
the junction temperature exceeds the thermal shutdown
threshold, T
SHDN
, typically 150_C. A continuous V
CC
hiccup is initiated after a thermal shutdown fault is detected.
The controller restarts at the next V
CC(on)
once the IC
temperature drops below below T
SHDN
by the thermal
shutdown hysteresis, T
SHDN(HYS)
, typically 20_C.
The thermal shutdown is also cleared if V
CC
drops below
V
CC(reset)
or a brown-out fault is detected. A new power up
sequences commences at the next V
CC(on)
once all the faults
are removed.
Table 5. ORDERING INFORMATION
Device Marking Freq.
OCP
Protection
V
CC
OVP
Protection
Fault Pin
Protection
BO
Levels
Package Shipping
NCP1239AD65R2G 1239A065 65 kHz Latch Latch Latch 110/101
SOIC−7
(Pb-Free
)
2500 /
Tape &
Reel
NCP1239BD65R2G 1239B065 65 kHz Auto-Recovery Latch Latch 110/101
NCP1239CD65R2G 1239C065 65 kHz Auto-Recovery Auto-Recovery Latch 110/101
NCP1239DD65R2G 1239D065 65 kHz Auto-Recovery Latch Latch 101/95
NCP1239ED65R2G 1239E065 65 kHz Auto-Recovery Auto-Recovery Auto-Recovery 110/101
NCP1239FD65R2G 1239F065 65 kHz Latch Latch Latch 229/176
NCP1239HD65R2G 1239H065 65 kHz Latch Latch Latch 229/224
NCP1239ID65R2G 1239I065 65 kHz Latch Latch Latch 101/95
NCP1239JD65R2G 1239J065 65 kHz Latch Latch Latch 101/95
NCP1239AD100R2G 1239A100 100 kHz Latch Latch Latch 110/101
NCP1239BD100R2G 1239B100 100 kHz Auto-Recovery Latch Latch 110/101
NCP1239ED100R2G 1239E100 100 kHz Auto-Recovery Auto-Recovery Auto-Recovery 110/101
NCP1239GD100R2G 1239G100 100 kHz Latch Latch Latch 95/86
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specification Brochure, BRD8011/D.
NCP1239
www.onsemi.com
26
PACKAGE DIMENSIONS
SOIC−7
CASE 751U
ISSUE E
SEATING
PLANE
1
4
58
R
J
X 45
_
K
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B ARE DATUMS AND T
IS A DATUM SURFACE.
4. DIMENSION A AND B DO NOT INCLUDE
MOLD PROTRUSION.
5. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
S
D
H
C
DIM
A
MIN MAX MIN MAX
INCHES
4.80 5.00 0.189 0.197
MILLIMETERS
B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.053 0.069
D 0.33 0.51 0.013 0.020
G 1.27 BSC 0.050 BSC
H 0.10 0.25 0.004 0.010
J 0.19 0.25 0.007 0.010
K 0.40 1.27 0.016 0.050
M 0 8 0 8
N 0.25 0.50 0.010 0.020
S 5.80 6.20 0.228 0.244
−A−
−B−
G
M
B
M
0.25 (0.010)
−T−
B
M
0.25 (0.010) T
S
A
S
M
7 PL
____
1.52
0.060
7.0
0.275
0.6
0.024
1.270
0.050
4.0
0.155
ǒ
mm
inches
Ǔ
SCALE 6:1
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
SOLDERING FOOTPRINT*
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P
UBLICATION ORDERING INFORMATION
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USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81−3−5817−1050
NCP1239/D
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For additional information, please contact your loc
al
Sales Representative

NCP1239JD65R2G

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
Switching Controllers NCP1239J 65KHZ
Lifecycle:
New from this manufacturer.
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