NE5560N Philips Semiconductors, NE5560N Datasheet

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NE5560N

Manufacturer Part Number
NE5560N
Description
Switched-mode power supply control circuit
Manufacturer
Philips Semiconductors
Datasheet

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NE5560N,,367,DIP16,NXP
0
1. Does not include current for timing resistors or capacitors.
Philips Semiconductors
DESCRIPTION
The NE/SE5560 is a control circuit for use in switched-mode power
supplies. This single monolithic chip incorporates all the control and
housekeeping (protection) functions required in switched-mode
power supplies, including an internal temperature-compensated
reference source, internal Zener references, sawtooth generator,
pulse-width modulator, output stage and various protection circuits.
FEATURES
ORDERING INFORMATION
ABSOLUTE MAXIMUM RATINGS
NOTES:
1994 Aug 31
16-Pin Plastic Dual In-Line Package (DIP)
16-Pin Plastic Small Outline Large (SOL) Package
16-Pin Plastic Dual In-Line Package (DIP)
16-Pin Cerdip Dual In-Line Package (CERDIP)
V
I
I
T
T
CC
OUT
Stabilized power supply
Temperature-compensated reference source
Sawtooth generator
Pulse-width modulator
Remote on/off switching
Current limiting
Low supply voltage protection
Loop fault protection
Demagnetization/overvoltage protection
Maximum duty cycle clamp
Feed-forward control
External synchronization
A
STG
CC
Switched-mode power supply control circuit
SYMBOL
Supply
Output transistor (at 20-30V max)
Operating ambient temperature range
Storage temperature range
Voltage-forced mode
Current-fed mode
Output current
Collector voltage (Pin 15)
Max. emitter voltage (Pin 14)
SE5560
NE5560
1
DESCRIPTION
PARAMETER
1
PIN CONFIGURATION
TEMPERATURE RANGE
DUTY CYCLE CONTROL
-55 C to 125 C
-55 C to 125 C
0 C to 70 C
0 to 70 C
MODULATOR
FEEDBACK
Figure 1. Pin Configuration
GAIN
V
V
R
C
CC
Z
T
T
1
2
3
4
5
6
7
8
D, F, N Packages
-55 to +125
-65 to +150
V
RATING
CC
0 to 70
+18
+5
30
40
+1.4V
ORDER CODE
NE5560N
NE5560D
SE5560N
SE5560F
16
15
14
13
12
11
10
9
FEEDFORWARD
OUTPUT (COLL)
OUTPUT (EMIT)
DEMAG: OVERVOLTAGE
GND
CURRENT LIMITING
REMOTE ON/OFF
EXTERNAL SYNC
NE/SE5560
Product specification
853-0125 13721
SOT162-1
UNIT
SOT38-4
SOT38-4
DWG #
mA
mA
0582B
V
V
V
C
C
C
SL00360

NE5560N Summary of contents

Page 1

... Product specification NE/SE5560 Packages FEEDFORWARD OUTPUT (COLL OUTPUT (EMIT DEMAG: OVERVOLTAGE 5 12 GND 6 11 CURRENT LIMITING 7 10 REMOTE ON/OFF EXTERNAL SYNC T SL00360 ORDER CODE DWG # NE5560N SOT38-4 NE5560D SOT162-1 SE5560N SOT38-4 SE5560F 0582B RATING UNIT + +1. -55 to +125 -65 to +150 C 853-0125 13721 ...

Page 2

... Philips Semiconductors Switched-mode power supply control circuit BLOCK DIAGRAM FEED FORWARD 16 SAWTOOTH REFERENCE GENERATOR VOLTAGE 0.48V 0.6V + FEEDBACK 3 VOLTAGE – 4 GAIN ADJUST 5 MODULATOR INPUT + 8 CUTY CYCLE CONTROL – + 0.6V 1k 0.48V – 11 CURRENT + LIMITING – 0.6V NOTE: 1. See Voltage/Current fed supply characteristic curve. ...

Page 3

... Philips Semiconductors Switched-mode power supply control circuit DC ELECTRICAL CHARACTERISTICS T = =12V, unless otherwise specified SYMBOL SYMBOL PARAMETER PARAMETER Reference sections V Internal reference voltage REF Temperature coefficient of V REF V Internal Zener reference Z Temperature coefficient Oscillator section Frequency range Initial accuracy oscillator Duty cycle range ...

Page 4

... Philips Semiconductors Switched-mode power supply control circuit DC ELECTRICAL CHARACTERISTICS SYMBOL SYMBOL PARAMETER PARAMETER Current limiting I Pin 11 Input current IN Single pulse inhibit delay OC2 Trip Levels: Shut down, slow start, low level OC1 Current limit, high level OC Low Level in terms of high level, ...

Page 5

... Philips Semiconductors Switched-mode power supply control circuit MAXIMUM PIN VOLTAGES Pin Feedback 4 Gain 5 Modulator 6 Duty Cycle Control External Sync 10 Remote On/Off 11 Current Limiting 12 GND 13 Demagnetization/Overvoltage 14 Output (Emit) 15 Output (Collector) 16 Feed-forward NOTES: 1. When voltage-forced, maximum is 18V; when current-fed, maximum is 30mA. See voltage-/current-fed supply characteristic curve. ...

Page 6

... Philips Semiconductors Switched-mode power supply control circuit TYPICAL PERFORMANCE CHARACTERISTICS Graph for Determining MAX MAX (%) 100 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Power Derating Curve 1 – 125 OPERATING CURVE Regulation vs Error Amp Closed Gain V /V (%) O REF – (3.72V) ...

Page 7

... Philips Semiconductors Switched-mode power supply control circuit TYPICAL PERFORMANCE CHARACTERISTICS Typical Frequency Plot f(kHz) 1000 100 R= R=10k R=20k 20 R=40k 2.5 3 3.5 THEORY OF OPERATION The following functions are incorporated: – A temperature-compensated reference source. – An error amplifier with Pin 3 as input. The output is connected to Pin 4 so that the gain is adjustable with external resistors. – ...

Page 8

... Philips Semiconductors Switched-mode power supply control circuit The current consumption at 12V is less than 10mA, provided that no current is drawn from V and R 20k . Z (7-12) The Sawtooth Generator Figure 6 shows the principal circuitry of the oscillator. A resistor between Pin 7 and Pin 12 (GND) determines the constant current that charges the timing capacitor C ...

Page 9

... Philips Semiconductors Switched-mode power supply control circuit 5.6V 1.1V >2V <0.8V 60dB 1kHz 10kHz Figure 8. Error Amplifier Compensation Open-Loop Gain (+) 8 1994 Aug 31 INHIBIT ‘SET’ Figure 7. Sawtooth Oscillator Synchronization SLOPE 20dB/DECADE 1MHz SL00367 3.72V + ERROR AMP 3 – PWM OUT (–) O.C. ...

Page 10

... Philips Semiconductors Switched-mode power supply control circuit REF REF 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 (+) 8 (%) 100 Figure 11. Transfer Curve of Pulse-Width Modulator Duty Cycle vs Input Voltage 1994 Aug 31 (%) – (3.72V Duty Cycle — — % Regulation 3.72V + ERROR AMP 3 – ...

Page 11

... Philips Semiconductors Switched-mode power supply control circuit 100 0.1 0.2 (%) MAX 50 MAX 40 30 MAX Figure 13. Soft-Start Minimum Duty Cycle vs R 0.6V START STOP 1994 Aug 31 MAX (%) R 1 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Figure 12. Graph for Determining MAX 90% MAX 70% ...

Page 12

... Philips Semiconductors Switched-mode power supply control circuit OC NORMAL OPERATING POINT LEVEL 1 LEVEL 2 .48 V (CURRENT LIMITING) 11 Figure 15. Output Characteristics Dynamic Current Limit and Current Protection (Pin 11) In many applications not necessary to have a real constant-current output of the SMPS. Protection of the power transistor will be the prime goal. This can be realized with the NE5560 in an economical way ...

Page 13

... Philips Semiconductors Switched-mode power supply control circuit Remote On/Off Circuit (Pin 10) In systems where two or more power supplies are used often necessary to switch these supplies on and off in a sequential way. Furthermore, there are many applications in which a supply must be switched by a logical signal. This can be done via the TTL-compatible remote on/off input on Pin 10 ...

Page 14

... Pin 1 voltage. 16 APPLICATIONS NE/SE5560 Push-Pull Regulator This application describes the use of the Philips Semiconductors NE/SE5560 adapted to function as a push-pull switched mode regulator, as shown in Figures 23 and 24. Input voltage range is +12V to +18V for a nominal output of +30V and -30V at a maximum load current of 1A with an average efficiency of 81% ...

Page 15

... Philips Semiconductors Switched-mode power supply control circuit NOTES: Power ground and signal ground must be kept separated T1, Primary = 130T (C.T.) #26 Secondary = 18T (C.T.) #22 Core = Ferroxcube 3622 3C8 material C.T. = 50T #26 0n Ferroxcube 2616 core (3C8) F2D bobbin T2, Primary = 16T (C.T.) #18 Secondaries (each) 52T (C.T.) #22 ...

Page 16

... Philips Semiconductors Switched-mode power supply control circuit NOTES: Power ground and signal ground must be kept separated T1, Primary = 130T (C.T.) #26 Secondary = 18T (C.T.) #22 Core = Ferroxcube 3622 3C8 material C.T. = 50T #26 0n Ferroxcube 2616 core (3C8) F2D bobbin T2, Primary = 16T (C.T.) #18 Secondaries (each) 52T (C.T.) #22 ...

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