NCP1294ED16 ONSEMI [ON Semiconductor], NCP1294ED16 Datasheet

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NCP1294ED16

Manufacturer Part Number
NCP1294ED16
Description
Enhanced Voltage Mode PWM Controller
Manufacturer
ONSEMI [ON Semiconductor]
Datasheet
1.NCP1294ED16.pdf (13 pages)
NCP1294
Product Preview
Enhanced Voltage Mode
PWM Controller
controller contains all of the features necessary for basic voltage mode
operation. This PWM controller has been optimized for high
frequency primary side control operation. In addition, this device
includes such features as: Soft−Start, accurate duty cycle limit control,
less than 50mA startup current, over and undervoltage protection, and
bidirectional synchronization. The NCP1294 is available in a 16 lead
SOIC narrow surface mount package.
Features
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*For additional information on our Pb−Free strategy and soldering details, please
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
© Semiconductor Components Industries, LLC, 2009
April, 2009 − Rev. P0
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
The NCP1294 fixed frequency feed forward voltage mode PWM
1.0 MHz Frequency Capability
Fixed Frequency Voltage Mode Operation, with Feed Forward
Thermal Shutdown
Undervoltage Lock−Out
Accurate Programmable Max Duty Cycle Limit
1.0 A Sink/Source Gate Drive
Programmable Pulse−By−Pulse Overcurrent Protection
Leading Edge Current Sense Blanking
75 ns Shutdown Propagation Delay
Programmable Soft−Start
Undervoltage Protection
Overvoltage Protection with Programmable Hysteresis
Bidirectional Synchronization
25 ns GATE Rise and Fall Time (1.0 nF Load)
3.3 V 3% Reference Voltage Output
Pb−Free Packages are Available*
1
NCP1294ED16
NCP1294EDR16
NCP1294EDR16G
NCP1294EDTB16G
NCP1294EDTB16R2G TSSOP−16
NCP1294ED16G
†For information on tape and reel specifications,
16
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
16
Device
1
ORDERING INFORMATION
NCP1294= Specific Device Code
A
WL, L
YY, Y
WW, W = Work Week
G
PIN CONNECTIONS AND
I
SYNC
SENSE
GATE
R
MARKING DIAGRAM
1
I
T
SET
OV
http://onsemi.com
UV
FF
C
T
= Assembly Location
= Wafer Lot
= Year
= Pb−Free Package
1
1
TSSOP−16
(Pb−Free)
(Pb−Free)
(Pb−Free)
SOIC−16
SOIC−16
SOIC−16 2500 Tape & Reel
(Pb−Free)
Package
SOIC−16
Publication Order Number:
CASE 751B
DTB SUFFIX
D SUFFIX
CASE 948F
SOIC−16
TSSOP−16
16
16
V
PGND
V
V
LGND
SS
COMP
V
2500 Tape & Reel
2500 Tape & Reel
C
CC
REF
FB
48 Units / Rail
48 Units / Rail
96 Units / Rail
Shipping
NCP1294/D
†

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NCP1294ED16 Summary of contents

Page 1

... Assembly Location WL Wafer Lot YY Year WW Work Week = Pb−Free Package G ORDERING INFORMATION Device Package NCP1294ED16 SOIC−16 NCP1294ED16G SOIC−16 (Pb−Free) NCP1294EDR16 SOIC−16 2500 Tape & Reel NCP1294EDR16G SOIC−16 (Pb−Free) NCP1294EDTB16G TSSOP−16 (Pb−Free) NCP1294EDTB16R2G TSSOP−16 (Pb−Free) † ...

Page 2

NCP1294 Figure 1. Application Diagram, 36 V− 5.0 V/5.0 A Converter http://onsemi.com 2 ...

Page 3

MAXIMUM RATINGS Operating Junction Temperature Lead Temperature Soldering: Storage Temperature Range ESD (Human Body Model) Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions ...

Page 4

ELECTRICAL CHARACTERISTICS (−40°C < 390 pF; unless otherwise specified Characteristic Reference Voltage Total Accuracy Line Regulation Load Regulation Noise Voltage Op Life Shift Fault Voltage V Voltage REF(OK) V Hysteresis REF(OK) ...

Page 5

ELECTRICAL CHARACTERISTICS (−40°C < 390 pF; unless otherwise specified Characteristic Gate Driver High Saturation Voltage Low Saturation Voltage High Voltage Clamp Output Current Output UVL Leakage Rise Time Fall Time Max ...

Page 6

PACKAGE PIN DESCRIPTION Package Pin Pin # Symbol 1 GATE External power switch driver with 1.0 A peak capability. Rail to rail output occurs when the capacitive load is between 470 pF and 10 nF Current sense comparator ...

Page 7

UVL − ENABLE + − UV Lockout Start/Stop SYNC 2 1.0 V Trip Points V 3 (1.263 V) − EAMP − COMP Soft−Start Clamp FF ...

Page 8

THEORY OF OPERATION Feed Forward Voltage Mode Control In conventional voltage mode control, the ramp signal has fixed rising and falling slope. The feedback signal is derived solely from the output voltage. Consequently, voltage mode control has inferior line regulation ...

Page 9

Soft−Start can be programmed through a capacitance connected to the SS pin. The constant charging current to the SS pin (typ). The V (ok) comparator monitors the 3 REF output and latches a ...

Page 10

Figure 8. The SYNC Pin Generates a Sync Pulse at the Beginning of Each Switching Cycle. CH2: GATE Pin, CH3 CH4: SYNC Pin T T Figure 9. Operation with External Sync. CH2: SYNC Pin, CH3: GATE Pin, ...

Page 11

500 400 300 200 100 0.0001 0.001 C (mF) T Figure 10. Typical Performance Characteristics, Oscillator Frequency vs. C that during ...

Page 12

G K −T− SEATING PLANE 0.25 (0.010 PACKAGE THERMAL DATA Parameter R qJC R qJA PACKAGE DIMENSIONS SOIC−16 D SUFFIX CASE 751B−05 ISSUE K −B− 0.25 ...

Page 13

K 16X 0.10 (0.004) 0.15 (0.006 L PIN 1 IDENT. 1 0.15 (0.006 −V− C 0.10 (0.004) −T− SEATING D PLANE 16X 0.36 ON Semiconductor and are registered trademarks of ...

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