DataSheet39.com

What is 1250B65?

This electronic component, produced by the manufacturer "ON Semiconductor", performs the same function as "Current-Mode PWM Controller".


1250B65 Datasheet PDF - ON Semiconductor

Part Number 1250B65
Description Current-Mode PWM Controller
Manufacturers ON Semiconductor 
Logo ON Semiconductor Logo 


There is a preview and 1250B65 download ( pdf file ) link at the bottom of this page.





Total 24 Pages



Preview 1 page

No Preview Available ! 1250B65 datasheet, circuit

NCP1250
Current-Mode PWM
Controller for Off-line
Power Supplies
The NCP1250 is a highly integrated PWM controller capable of
delivering a rugged and high performance offline power supply in a
tiny TSOP6 or PDIP8 package. With a supply range up to 28 V, the
controller hosts a jittered 65 kHz or 100 kHz switching circuitry
operated in peak current mode control. When the power on the
secondary side starts to decrease, the controller automatically folds
back its switching frequency down to a minimum level of 26 kHz. As
the power further goes down, the part enters skip cycle while limiting
the peak current.
Over Power Protection (OPP) is a difficult exercise especially when
noload standby requirements drive the converter specifications. The
ON proprietary integrated OPP lets you harness the maximum
delivered power without affecting your standby performance simply
via two external resistors. An Over Voltage Protection input is also
combined on the same pin and protects the whole circuitry in case of
optocoupler failure or adverse open loop operation.
Finally, a timerbased shortcircuit protection offers the best
protection scheme, letting you precisely select the protection trip point
irrespective of a loose coupling between the auxiliary and the power
windings.
Features
FixedFrequency 65 or 100 kHz CurrentMode Control Operation
Internal and Adjustable Over Power Protection (OPP) Circuit
Frequency Foldback Down to 26 kHz and SkipCycle in Light Load
Conditions
Internal Ramp Compensation
Internal Fixed 4 ms SoftStart
100 ms TimerBased AutoRecovery ShortCircuit Protection
Frequency Jittering in Normal and Frequency Foldback Modes
Option for AutoRecovery or Latched ShortCircuit Protection
OVP Input for Improved Robustness
Up to 28 V VCC Operation
+300 mA/500 mA Source/Sink Drive Capability
Less than 100 mW Standby Power at High Line
EPS 2.0 Compliant
These are PbFree Devices
Typical Applications
acdc Converters for TVs, Settop Boxes and Printers
Offline Adapters for Notebooks and Netbooks
www.onsemi.com
MARKING
DIAGRAMS
TSOP6
(SOT236)
SN SUFFIX
25xAYWG
1 CASE 318G
G
1
PDIP8
SUFFIX P
Case 626
125xy65
AWL
YYWWG
25x = Specific Device Code
x = A, 2, C, D, 0, 1
y = A or B
A = Assembly Location
WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
G or G = PbFree Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
GND 1
6 DRV
FB 2
OPP/Latch 3
5 VCC
4 CS
TSOP6
(Top View)
GND 1
DRV 2
N/C 3
VCC 4
8 OPP/LATCH
7 N/C
6 FB
5 CS
PDIP8
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 3 of this data sheet.
© Semiconductor Components Industries, LLC, 2015
April, 2015 Rev. 10
1
Publication Order Number:
NCP1250/D

line_dark_gray
1250B65 equivalent
NCP1250
ELECTRICAL CHARACTERISTICS
(For typical values TJ = 25°C, for min/max values TJ = 40°C to +125°C, Max TJ = 150°C, VCC = 12 V unless otherwise noted)
Symbol
Rating
Min Typ Max
SUPPLY SECTION (For the best efficiency performance, we recommend a VCC below 20 V)
VCCON VCC increasing level at which driving pulses are authorized
VCC(min) VCC decreasing level at which driving pulses are stopped
VCCHYST Hysteresis VCCON VCC(min)
VZENER Clamped VCC when latched off / burst mode activation @ ICC = 500 mA
ICC1 Startup current
16 18 20
8.2 8.8 9.4
6.0
7.0
15
ICC2
Internal IC consumption with IFB = 50 mA, FSW = 65 kHz and CL = 0 nF
1.4 2.2
ICC3
Internal IC consumption with IFB = 50 mA, FSW = 65 kHz and CL = 1 nF
2.1 3.0
ICC2
Internal IC consumption with IFB = 50 mA, FSW = 100 kHz and CL = 0 nF
1.7 2.5
ICC3
Internal IC consumption with IFB = 50 mA, FSW = 100 kHz and CL = 1 nF
3.1 4.0
ICCLATCH
Current flowing into VCC pin that keeps the controller latched (Note 4)
TJ = 40°C to +125°C
TJ = 0°C to +125°C
40
32
ICCstby
Internal
FET)
IC
consumption
while
in
skip
cycle
(VCC
=
12
V,
driving
a
typical
6
A/600
V
MOS-
550
Rlim Currentlimit resistor in series with the latch SCR
DRIVE OUTPUT
4.0
Tr Output voltage risetime @ CL = 1 nF, 1090% of output signal
Tf Output voltage falltime @ CL = 1 nF, 1090% of output signal
ROH
Source resistance
ROL Sink resistance
Isource Peak source current, VGS = 0 V – (Note 5)
Isink Peak sink current, VGS = 12 V – (Note 5)
VDRVlow DRV pin level at VCC close to VCC(min) with a 33 kW resistor to GND
VDRVhigh DRV pin level at VCC = 28 V – DRV unloaded
CURRENT COMPARATOR
40
30
13
6.0
300
500
8.0
10 12 14
IIB
VLimit1
VLimit2
Vfold
Vfreeze
TDEL
TLEB
TSS
Input Bias Current @ 0.8 V input level on CS Pin
Maximum internal current setpoint – TJ = 25°C – OPP/Latch Pin grounded
Maximum internal current setpoint – TJ = 40°C to 125°C – OPP/Latch Pin grounded
Default internal voltage set point for frequency foldback trip point – 45% of Vlimit
Internal peak current setpoint freeze ([31% of Vlimit)
Propagation delay from current detection to gate offstate
Leading Edge Blanking Duration
Internal softstart duration activated upon startup, autorecovery
0.02
0.744 0.8 0.856
0.72 0.8 0.88
357
250
100 150
300
4.0
IOPPo Setpoint decrease for the OPP/Latch pin biased to –250 mV – (Note 6)
31.3
IOOPv
IOOPv
Voltage setpoint for the OPP/Latch pin biased to 250 mV – (Note 6), TJ = 25°C
Voltage setpoint for the OPP/Latch pin biased to 250 mV – (Note 6), TJ = 40°C to
125°C
0.51 0.55 0.60
0.50 0.55 0.62
IOPPs Setpoint decrease for the OPP/Latch pin grounded
0
INTERNAL OSCILLATOR
fOSC
fOSC
Oscillation frequency (65 kHz version)
Oscillation frequency (100 kHz version)
61 65 71
92 100 108
Unit
V
V
V
V
mA
mA
mA
mA
mA
mA
mA
kW
ns
ns
W
W
mA
mA
V
V
mA
V
V
mV
mV
ns
ns
ms
%
V
V
%
kHz
kHz
www.onsemi.com
5


line_dark_gray

Preview 5 Page


Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for 1250B65 electronic component.


Information Total 24 Pages
Link URL [ Copy URL to Clipboard ]
Product Image
and Detail view

1250B65 image


1. Datasheet - Current-Mode PWM Controller

[ Learn More ]




Download [ 1250B65.PDF Datasheet ]

Share Link :

Electronic Components Distributor


An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists.


SparkFun Electronics Allied Electronics DigiKey Electronics Arrow Electronics
Mouser Electronics Adafruit Newark Chip One Stop


Featured Datasheets

Part NumberDescriptionMFRS
1250B65The function is Current-Mode PWM Controller. ON SemiconductorON Semiconductor

Semiconductors commonly used in industry:

1N4148   |   BAW56   |   1N5400   |   NE555   |  

LM324   |   BC327   |   IRF840  |   2N3904   |  



Quick jump to:

1250     1N4     2N2     2SA     2SC     74H     BC     HCF     IRF     KA    

LA     LM     MC     NE     ST     STK     TDA     TL     UA    



Privacy Policy   |    Contact Us     |    New    |    Search