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Philipss - Switched-mode power supply control circuit

Numéro de référence NE5562N
Description Switched-mode power supply control circuit
Fabricant Philipss 
Logo Philipss 





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NE5562N fiche technique
Philips Semiconductors
Switched-mode power supply control circuit
Product specification
NE/SE5562
DESCRIPTION
The NE/SE5562 is a single-output control circuit for switched-mode
power supplies. This single monolithic IC contains all control and
protection features needed for full-featured switched-mode power
supplies.
The 100mA source/sink output is designed to drive power FETs
directly. The associated output logic is designed to prevent double
pulsing or cross-conduction current spiking on the output.
All of the control and protect features work cycle-by-cycle up to the
maximum operating frequency of 600kHz.
For ease of interface, all digital inputs are TTL or CMOS compatible.
The NE5562 is supplied in 20-pin glass/ceramic (Cerdip), plastic
DIP, and plastic SO packages. The NE grade part is characterized
and guaranteed over the commercial ambient temperature range of
0°C to +70°C and junction temperature range of 0°C to +85°C. The
SE5562 is supplied in the glass/ceramic (Cerdip) package. The SE
grade part is characterized and guaranteed over the ambient
temperature range of -55 to +125°C and junction temperature range
of -55 to +135°C.
FEATURES
Stabilized power supply
Temperature-compensated reference source
Sawtooth generator
Pulse width modulator
Remote on/off switching
Current limiting (2 levels)
PIN CONFIGURATION
D, F, N Packages
FEED FORWARD 1
CT 2
RT 3
EXTERNAL MOD IN 4
DUTY CYCLE CONTROL 5
REMOTE ON/OFF 6
VI 7
FEEDBACK VOLTAGE 8
VZ 9
ERROR AMP OUT 10
20 GROUND
19 OUTPUT
18 DEMAG OVERVOLT IN
17 VS
16 C DELAY
15 OUT INVERT CONTROL
14 CURRENT SENSE
13 AUX COMP HYSTERESIS
12 AUX COMP INPUT
11 EXTERNAL SYNC IN
TOP VIEW
Figure 1. Pin Configuration
SL00388
Auxiliary comparator, with adjustable hysteresis
Loop fault protection
Demagnetization/overvoltage protection
Duty cycle adjust and clamp
Feed-forward control
External synchronization
Total shutdown after adjustable number of overcurrent faults
Soft-start
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic Small Outline (SO) Package
20-Pin Plastic Dual In-Line Package (DIP)
20-Pin Ceramic Dual In-Line Package (CERDIP)
TEMPERATURE RANGE
0 to +70°C
0 to +70°C
-55°C to +125°C
ORDER CODE
NE5562D
NE5562N
SE5562F
DWG #
1021B
SOT146-1
SOT146-1
1994 Aug 31
1 853-0811 13721

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