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NCP1251BSN100T1G

Description
Switching Controllers OCP AUTO OVP VCC LATCH
CategoryPower/power management    The power supply circuit   
File Size252KB,24 Pages
ManufacturerON Semiconductor
Websitehttp://www.onsemi.cn
Environmental Compliance
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NCP1251BSN100T1G Overview

Switching Controllers OCP AUTO OVP VCC LATCH

NCP1251BSN100T1G Parametric

Parameter NameAttribute value
Brand NameON Semiconductor
Is it lead-free?Lead free
Is it Rohs certified?conform to
Parts packaging codeTSOP
package instructionTSSOP, TSOP6,.11,37
Contacts6
Manufacturer packaging code318G-02
Reach Compliance Codecompliant
ECCN codeEAR99
Factory Lead Time29 weeks
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage28 V
Minimum input voltage9.4 V
Nominal input voltage12 V
JESD-30 codeR-PDSO-G6
JESD-609 codee3
length3 mm
Humidity sensitivity level1
Number of functions1
Number of terminals6
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Encapsulate equivalent codeTSOP6,.11,37
Package shapeRECTANGULAR
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
Maximum seat height1.1 mm
surface mountYES
Switch configurationSINGLE
Maximum switching frequency108 kHz
Temperature levelAUTOMOTIVE
Terminal surfaceTin (Sn)
Terminal formGULL WING
Terminal pitch0.95 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width1.5 mm
Base Number Matches1
NCP1251
Current-Mode PWM
Controller for Off-line
Power Supplies
The NCP1251 is a highly integrated PWM controller capable of
delivering a rugged and high performance offline power supply in a
tiny TSOP−6 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
no−load 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. A latched Over Voltage Protection (OVP) is
combined on the same pin. For ease of implementation, a latched OVP
also monitors the V
CC
line. They offer an efficient protection in case
of optocoupler destruction or adverse open loop operation.
Finally, a timer−based short−circuit 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
www.onsemi.com
MARKING
DIAGRAM
TSOP−6
(SOT23−6)
SN SUFFIX
CASE 318G
STYLE 13
5xy
x
y
A
Y
W
G
5xyAYWG
G
1
1
= Specific Device Code
= A or U
= A, 2, C, D, or F
= Assembly Location
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
GND
FB
OPP/Latch
1
2
3
(Top View)
6
5
4
DRV
V
CC
CS
Fixed−Frequency 65 or 100 kHz Current−Mode Control Operation
Internal and Adjustable Over Power Protection (OPP) Circuit
Frequency Foldback Down to 26 kHz and Skip−Cycle in Light Load
Conditions
Internal Ramp Compensation
Internal Fixed 4 ms Soft−Start
100 ms Timer−Based Auto−Recovery Short−Circuit Protection
Frequency Jittering in Normal and Frequency Foldback Modes
Option for Auto−Recovery or Latched Short−Circuit Protection
OVP Input for Improved Robustness
Up to 28 V V
CC
Operation
Latched or Auto−Recovery OVP Protection on V
CC
+300 mA / −500 mA Source/Sink Drive Capability
Less than 100 mW Standby Power at High Line
EPS 2.0 Compliant
These are Pb−Free Devices
ORDERING INFORMATION
See detailed ordering, marking and shipping information on
page 2 of this data sheet.
Typical Applications
ac−dc Converters for TVs, Set−top Boxes and Printers
Offline Adapters for Notebooks and Netbooks
©
Semiconductor Components Industries, LLC, 2015
1
June, 2015 − Rev. 14
Publication Order Number:
NCP1251/D

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