Philips NE5560, SE5560 User Manual

Philips Semiconductors Product specification

NE/SE5560Switched-mode power supply control circuit

1

1994 Aug 31 853-0125 13721

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

•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

PIN CONFIGURATION

D, F, N Packages

1
2
3
4
5
6
7
8

9

10

11

12

13

14

16
15

V

CC

V

Z

FEEDBACK

GAIN

MODULATOR

DUTY CYCLE CONTROL

R

T

C

T

FEEDFORWARD
OUTPUT (COLL)
OUTPUT (EMIT)
DEMAG: OVERVOLTAGE
GND
CURRENT LIMITING
REMOTE ON/OFF
EXTERNAL SYNC

SL00360

Figure 1. Pin Configuration

ORDERING INFORMATION

DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #

16-Pin Plastic Dual In-Line Package (DIP) 0 to 70°C NE5560N SOT38-4
16-Pin Plastic Small Outline Large (SOL) Package 0°C to 70°C NE5560D SOT162-1
16-Pin Plastic Dual In-Line Package (DIP) -55°C to 125°C SE5560N SOT38-4
16-Pin Cerdip Dual In-Line Package (CERDIP) -55°C to 125°C SE5560F 0582B

ABSOLUTE MAXIMUM RATINGS

SYMBOL PARAMETER RATING UNIT

Supply

1

V

CC

Voltage-forced mode +18 V

I

CC

Current-fed mode 30 mA

Output transistor (at 20-30V max)

I

OUT

Output current 40 mA
Collector voltage (Pin 15) VCC+1.4V V
Max. emitter voltage (Pin 14) +5 V

T

A

Operating ambient temperature range

SE5560 -55 to +125 °C
NE5560 0 to 70 °C

T

STG

Storage temperature range -65 to +150 °C

NOTES:

1. Does not include current for timing resistors or capacitors.

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Philips Semiconductors Product specification

NE/SE5560Switched-mode power supply control circuit

1994 Aug 31

2

BLOCK DIAGRAM

NOTE:

1. See Voltage/Current fed supply characteristic curve.

FEED

FORWARD

EXTERNAL

SYNC INPUT

DEMAGNETIZATION

OVER-VOLTAGE PROTECTION

REFERENCE

VOLTAGE

SAWTOOTH

GENERATOR

FEEDBACK

VOLTAGE

GAIN ADJUST

MODULATOR

INPUT

CUTY CYCLE

CONTROL

CURRENT

LIMITING

+
–

0.48V

0.6V

+

0.6V

0.6V

0.48V

+
–

–
+

+
–

–
+

PULSE WIDTH
MODULATOR

–
+

0.6V

S

R

LATCH

Q

R
S

START
STOP

REMOTE

ON/OFF

STABILIZED

SUPPLY

+ –

0.6V

3

4

5

8

11

10 1 12

2

14

15

13

9

8716

OUTPUTS

C

TRT

V

Z

V

CC

1kΩ

100Ω

OC

1

Q

1

+

–

V

CC

SL00361

Figure 2. Block Diagram

Philips Semiconductors Product specification

NE/SE5560Switched-mode power supply control circuit

1994 Aug 31

3

DC ELECTRICAL CHARACTERISTICS

TA=25°C, VCC=12V, unless otherwise specified.

SE5560 NE5560

SYMBOL

PARAMETER

TEST CONDITIONS

Min Typ Max Min Typ Max

UNIT

Reference sections

V

REF

Internal reference voltage 25°C 3.69 3.72 3.81 3.57 3.72 3.95 V

Over temperature 3.65 3.85 3.53 4.00 V

Temperature coefficient of V

REF

-100 -100 ppm/°C

V

Z

Internal Zener reference IL=-7mA 7.8 8.4 8.8 7.8 8.4 8.8 V
Temperature coefficient of V

Z

200 200 ppm/°C

Oscillator section

Frequency range Over temperature 50 100k 50 100k Hz
Initial accuracy oscillator R=5kΩ 5 5 %
Duty cycle range fO=20kHz 0 98 0 98 %

Modulator

Modulation input current

Voltage at Pin 5=2V Over

temperature

0.2 20 0.2 20 µA

Housekeeping function

At 2V

I

IN‘

Pin 6, input current

Over temperature 0.2 20 0.2 20 µA

For 50% max duty cycle

Pin 6, duty cycle limit control

15kHz to 50kHz/41% of V

Z

40 50 60 40 50 60

% of duty

cycle

Pin 1, low supply voltage
protection thresholds

8 9.0 10.5 8 9.0 10.5 V

Pin 3, feedback loop protection trip
threshold

400 600 720 400 600 720 mV

At 2V
Pin 3, pull-up current -7 -15 -35 -7 -15 -35 µA
Pin 13,

demagnetization/over-voltage
protection trip on threshold

Over temperature 470 600 720 470 600 720 mV

At 0.25V

I

IN

Pin 13, input current 25°C -0.6 -10 -0.6 -10 µA

Over temperature -20 -20

Pin 16, feed-forward duty cycle
control

Voltage at Pin 16=2V

Z

30 40 50 30 40 50

% original
duty cycle

At 16V, VCC=18V

*Pin 16, feed-forward input current 25°C 0.2 5 0.2 5 µA

Over temperature 10 10 µA

External synchronization

Pin 9 Off 0 0.8 0 0.8 V
On 2 V

Z

2 V

Z

V

Sink current Voltage at Pin 9=0V, 25°C -65 -100 -65 -125 µA

Over temperature -125 -125 µA

Remote

Pin 10 Off 0 0.8 0 0.8 V
On 2 V

Z

2 V

Z

V

At 0V
Sink current 25°C -85 -100 -85 -125 µA

Over temperature -125 -125 µA

Philips Semiconductors Product specification

NE/SE5560Switched-mode power supply control circuit

1994 Aug 31

4

DC ELECTRICAL CHARACTERISTICS (Continued)

SE5560 NE5560

SYMBOL

PARAMETER

TEST CONDITIONS

Min Typ Max Min Typ Max

UNIT

Current limiting

I

IN

Pin 11 Input current Voltage at

Pin 11=250mV

-2 -20 -2 -20 µA

25°C

Over temperature -40 -40 µA

Single pulse inhibit delay Inhibit delay time for 20%

overdrive at 40mA I

OUT

0.7 0.8 0.7 0.8 µs

OC2 Trip Levels: Shut down, slow start,

low level

0.500 0.600 0.700 0.500 0.600 0.700 V

OC1 Current limit, high level 0.400 0.480 0.560 0.400 0.560 0.500 V
∆OC Low Level in terms of high level,

OC

2

0.750 0.800 0.850 0.750 0.800 0.850 V

Error amplifier

V

OH

Output voltage swing 6.2 9.5 6.2 9.5 V

V

OL

Output voltage swing 0.7 0.7 V
Open-loop gain 54 60 54 60 dB

R

F

Feedback resistor 10k 10k Ω

BW Small-signal bandwidth 3 3 MHz

Output stage

VCE(SAT) IC=40mA 0.5 0.5 V
Output current (Pin 15) 40 40 mA
Max. emitter voltage (Pin 14) 5 6 5 6 V

Supply voltage/current

1

I

CC

Supply current IZ=0, voltage-forced,

VCC=12V, 25°C 10 10 mA

Over temp. 15 15 mA

V

CC

Supply voltage ICC=10mA current-fed 20 23 19 24 V

V

CC

Supply voltage ICC=30mA current-fed 20 30 20 30 V

NOTES:

1. Does not include current for timing resistors or capacitors.

Philips Semiconductors Product specification

NE/SE5560Switched-mode power supply control circuit

1994 Aug 31

5

MAXIMUM PIN VOLTAGES

NE5560

Pin No Function Maximum Voltage

1 V

CC

See Note 1

2 V

Z

Do not force (8.4V)

3 Feedback V

Z

4 Gain
5 Modulator V

Z

6 Duty Cycle Control V

Z

7 R

T

Current force mode

8 C

T

9 External Sync V

Z

10 Remote On/Off V

Z

11 Current Limiting V

CC

12 GND GND
13 Demagnetization/Overvoltage V

CC

14 Output (Emit) V

Z

15 Output (Collector) VCC+2V

BE

16 Feed-forward V

CC

NOTES:

1. When voltage-forced, maximum is 18V; when current-fed, maximum is 30mA. See voltage-/current-fed supply characteristic curve.

TYPICAL PERFORMANCE CHARACTERISTICS

60

50

40

30

20

10

0

1k 10k 100k 1M 10M

FREQUENCY (Hz)

GAIN (dB)

Open-Loop Gain

0

–30

–60

–90

–120

–150

–180

1k 10k 100k 1M 10M

FREQUENCY (Hz)

PHASE ANGLE (DEG)

Open-Loop Phase

Error Amplifier

SL00362

Figure 3. Typical Performance Characteristics