NCP1378DR2G ON Semiconductor, NCP1378DR2G Datasheet

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NCP1378DR2G

Manufacturer Part Number
NCP1378DR2G
Description
IC CTRLR PWM CM OVP UVLO 8SOIC
Manufacturer
ON Semiconductor
Datasheet

Specifications of NCP1378DR2G

Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
100kHz
Voltage - Supply
8.2 V ~ 18 V
Buck
No
Boost
No
Flyback
Yes
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
No
Operating Temperature
0°C ~ 125°C
Package / Case
8-SOIC (3.9mm Width)
Frequency-max
100kHz
Output Voltage
16 V
Output Current
500 mA
Mounting Style
SMD/SMT
Switching Frequency
100 KHz
Operating Supply Voltage
18 V
Maximum Operating Temperature
+ 150 C
Fall Time
20 ns
Rise Time
40 ns
Synchronous Pin
No
Topology
Flyback
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Duty Cycle
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
NCP1378DR2GOS
NCP1378DR2GOS
NCP1378DR2GOSTR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
NCP1378DR2G
Manufacturer:
ON/安森美
Quantity:
20 000
NCP1378
PWM Current- - Mode
Controller for Free- - Running
Quasi- - Resonant Operation
a demagnetization detector to ensure full borderline/critical
Conduction Mode in any load/line conditions and minimum drain
voltage switching (Quasi- - Resonant operation). Due to its inherent
skip cycle capability, the controller enters burst mode as soon as the
power demand falls below a predetermined level. As this happens at
low peak current, no audible noise can be heard. An internal 8.0 ms
timer prevents the free- - run frequency to exceed 100 kHz (therefore
below the 150 kHz CISPR- - 22 EMI starting limit), while the skip
adjustment capability lets the user select the frequency at which the
burst foldback takes place.
winding which, brought via a dedicated pin, also enables fast Over
Voltage Protection (OVP). Once an OVP has been detected, the IC
permanently latches off.
presence of an overcurrent condition, disables the output pulses and
enters a safe burst mode, trying to restart. Once the default has gone,
the device auto- - recovers. Finally an internal 1.0 ms Soft- - Start
eliminates the traditional startup stress.
UVLO thresholds of 8.4 V (on) and 7.5 V (off).
Features
Typical Applications
*For additional information on our Pb- -Free strategy and soldering details, please
 Semiconductor Components Industries, LLC, 2010
December, 2010 - - Rev. 7
download the ON Semiconductor Soldering and Mounting Techniques Reference
Manual, SOLDERRM/D.
The NCP1378 combines a true current mode modulator and
The transformer core reset detection is done through an auxiliary
The NCP1378 also features an efficient protective circuitry that, in
The NCP1378 is tailored for low voltage applications having
Free- - Running Borderline/Critical Mode Quasi- - Resonant Operation
Latched Overvoltage Protection
Auto- - Recovery Short- - Circuit Protection Via UVLO Crossover
Current- - Mode with Adjustable Skip Cycle Capability
Internal 1.0 ms Soft- - Start
Internal Temperature Shutdown
Internal Leading Edge Blanking
500 mA Peak Current Source/Sink Capability
External Latch Triggering, e.g. Via Overtemperature Signal
Direct Optocoupler Connection
SPICE Models Available for TRANsient Analysis
Internal 8.0 ms Minimum T
These are Pb- - Free Devices*
Battery- - Based Operations
OFF
1
†For information on tape and reel specifications,
NCP1378DR2G
NCP1378PG
8
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
8
Device
1
1
A
L, WL
Y, YY
W, WW
G or G
ORDERING INFORMATION
GND
Dmg
CS
FB
PIN CONNECTIONS
http://onsemi.com
1
2
3
4
CASE 626B
CASE 751
D SUFFIX
P SUFFIX
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb- -Free Package
(Pb- -Free)
(Pb- -Free)
SOIC- - 8
PDIP- - 7
Package
(Top View)
SOIC- -8
PDIP- -7
Publication Order Number:
8 HV
6 V
5 Drv
2500 Tape & Reel
1
DIAGRAMS
8
1
50 Units/Rail
MARKING
CC
Shipping
NCP1378/D
ALYW
YYWWG
1378
1378P
G
AWL

Related parts for NCP1378DR2G

NCP1378DR2G Summary of contents

Page 1

... PIN CONNECTIONS Dmg GND 4 (Top View) ORDERING INFORMATION Device Package NCP1378DR2G SOIC- -8 (Pb- -Free) NCP1378PG PDIP- -7 (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. 1 MARKING DIAGRAMS ...

Page 2

OVP and + Demag Universal Network *Please refer to the application information section. PIN FUNCTION DESCRIPTION Pin Symbol Function 1 Demag Core reset detection and OVP 2 FB Sets the peak current setpoint 3 CS Current sense input and skip ...

Page 3

HV PON 8.4 V 7.5 V 5.6 V (Fault) Fault To Internal Mngt. Supply GND *S and R are level triggered whereas S is edge triggered. R has priority over the other ...

Page 4

ELECTRICAL CHARACTERISTICS unless otherwise noted.) Characteristic SUPPLY SECTION V Increasing Level at which the Current Source Turns- -Off CC Minimum Operating Voltage after Turn- -On V Excursion between VCC and VCC Decreasing Level at which the Latchoff ...

Page 5

TEMPERATURE (C) Figure 3. V Threshold versus Temperature CCON 1.6 1.4 1.2 1.0 0.8 0.6 0 TEMPERATURE (C) Figure 5. Current Consumption ...

Page 6

TEMPERATURE (C) Figure 9. Drive Source Resistance versus Temperature 120 100 - TEMPERATURE (C) Figure 11. Demagnetization ...

Page 7

INTRODUCTION The NCP1378 implements a standard current mode architecture where the switch- - off time is dictated by the peak current setpoint, whereas the core reset detection triggers the turn event . This component represents the ideal candidate ...

Page 8

Once the power supply has started, the Vcc shall be constrained below 16 V, which is the maximum rating on pin 6. Figure 16 portrays a typical NCP1378 startup sequence with a Vcc regulated at 8.0 V. 9.0 8.4 V ...

Page 9

Drain Signal Timeout Signal Drain Signal Timeout Signal Figure 19. When the primary natural ringing becomes too low, the current sense initiates a new cycle when FB passes the skip level. An optocoupler is generally used to transfer the feedback ...

Page 10

An internal timer prevents any restart within 8.0 ms further to the driver going- - low transition. This prevents the switching frequency to exceed (1.0/T avoid false leakage inductance tripping at turn- - off. In some cases, the leakage inductance ...

Page 11

CTN NCP1378 Figure 24. A simple CTN triggers the latchoff as soon as the temperature exceeds a given setpoint. Shutting Off the NCP1378 Shutdown can easily be implemented through a simple NPN ...

Page 12

Vcc ON Figure 27. Typical Waveforms in Short Circuit Conditions Soft- -Start The NCP1378 features an internal 1.0 ms Soft- - Start to soften the constraints occurring in the power supply during startup activated during the power on ...

Page 13

Figure 28. This plot gathers waveforms captured at three different operating points Upper Plot: Free run, valley switching operation, Pout = Middle Plot: Min Toff clamps the switching frequency and selects the second valley. ...

Page 14

... S B 0.25 (0.010 SEATING PLANE - - 0.25 (0.010 *For additional information on our Pb- -Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. PACKAGE DIMENSIONS SOIC CASE 751--07 ISSUE 0.10 (0.004 SOLDERING FOOTPRINT* 1.52 0.060 7.0 4.0 0.275 ...

Page 15

... SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303- -675- -2175 or 800- -344- -3860 Toll Free USA/Canada Fax: 303- -675- -2176 or 800- -344- -3867 Toll Free USA/Canada Email: orderlit@onsemi ...

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