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NE5562N Datasheet

  • NE5562N

  • Switched-mode power supply control circuit

  • 29頁

  • PHILIPS

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Philips Semiconductors
Product specification
Switched-mode power supply control circuit
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擄C to +70擄C and junction temperature range of 0擄C to +85擄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擄C and junction temperature range
of -55 to +135擄C.
PIN CONFIGURATION
D, F, N Packages
FEED FORWARD 1
C
T
2
R
T
3
EXTERNAL MOD IN 4
DUTY CYCLE CONTROL 5
REMOTE ON/OFF 6
V
I
7
FEEDBACK VOLTAGE 8
V
Z
9
ERROR AMP OUT 10
TOP VIEW
20 GROUND
19 OUTPUT
18 DEMAG OVERVOLT IN
17 V
S
16 C DELAY
15 OUT INVERT CONTROL
14 CURRENT SENSE
13 AUX COMP HYSTERESIS
12 AUX COMP INPUT
11 EXTERNAL SYNC IN
SL00388
Figure 1. Pin Configuration
FEATURES
鈥?/div>
Stabilized power supply
鈥?/div>
Temperature-compensated reference source
鈥?/div>
Sawtooth generator
鈥?/div>
Pulse width modulator
鈥?/div>
Remote on/off switching
鈥?/div>
Current limiting (2 levels)
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)
鈥?/div>
Auxiliary comparator, with adjustable hysteresis
鈥?/div>
Loop fault protection
鈥?/div>
Demagnetization/overvoltage protection
鈥?/div>
Duty cycle adjust and clamp
鈥?/div>
Feed-forward control
鈥?/div>
External synchronization
鈥?/div>
Total shutdown after adjustable number of overcurrent faults
鈥?/div>
Soft-start
TEMPERATURE RANGE
0 to +70擄C
0 to +70擄C
-55擄C to +125擄C
ORDER CODE
NE5562D
NE5562N
SE5562F
DWG #
1021B
SOT146-1
SOT146-1
1994 Aug 31
1
853-0811 13721

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