NE5568FE Philipss, NE5568FE Datasheet
NE5568FE
Manufacturer Part Number
NE5568FE
Description
Switched-mode power supply controller
Manufacturer
Philipss
Datasheet
1.NE5568FE.pdf
(2 pages)
Philips Semiconductors
DESCRIPTION
The NE5568 is a control circuit for use in switched mode power
supplies. It contains an internal temperature-compensated supply,
PWM, sawtooth oscillator, over-current sense latch, and output
stage. The device is intended for low cost SMPS applications where
extensive housekeeping functions are not required. The NE5568 is
a selected version of the NE5561.
FEATURES
ORDERING INFORMATION
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
1994 Aug 31
8-Pin Plastic Dual In-Line Package (DIP)
8-Pin Cerdip Dual In-Line Package (CERDIP)
V
I
P
T
OUT
Micro-miniature (D) package
Pulse width modulator
Current limiting (cycle by cycle)
Sawtooth generator
Stabilized power supply
Double-pulse protection
Internal temperature-compensated reference
A
CC
D
Switched-mode power supply controller
SYMBOL
Supply voltage
Output current
Output duty cycle
Max total power dissipation
Operating temperature range
DESCRIPTION
FEEDBACK
CURRENT
SENSE
GAIN
0.5V
3
4
6
+
–
–
+
ERROR
AMP
REF
VOLTAGE
PARAMETER
Figure 2. Block Diagram
PWM
SAWTOOTH
GENERATOR
R
T
5
, C
1
T
PIN CONFIGURATION
APPLICATIONS
TEMPERATURE RANGE
Switch mode power supplies
DC motor controller inverter
DC/DC converter
V
0 to +70 C
0 to +70 C
CC
STABILIZED
SUPPLY
S
R
1
LATCH
FEEDBACK
GAIN
GND
V
Figure 1. Pin Configuration
CC
V
8
Z
8.2V
1
2
3
4
7
FE, N Packages
2
RATING
V
0 to 70
CC
0.75
V
18
40
98
OUTPUT
TOP VIEW
Z
ORDER CODE
NE5568FE
NE5568N
8
7
6
5
GND
OUTPUT
CURRENT SENSE
Product specification
R
T
, C
T
853-0890 13721
NE5568
UNIT
mA
W
SOT97-1
%
V
C
DWG #
0580A
SL00437
SL00438
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NE5568FE Summary of contents
Page 1
... FE, N Packages 1 8 GND OUTPUT CURRENT SENSE TOP VIEW SL00437 Figure 1. Pin Configuration ORDER CODE DWG # NE5568N SOT97-1 NE5568FE 0580A OUTPUT 8. SL00438 RATING UNIT 0. 853-0890 13721 ...
Page 2
Philips Semiconductors Switched-mode power supply controller DC ELECTRICAL CHARACTERISTICS V =12V, T =25 C, unless otherwise specified SYMBOL SYMBOL PARAMETER PARAMETER Reference section V Internal reference voltage REF V Internal zener ref Z Temperature coefficient of V REF ...