Seme LAB IP5560 Switched.mode power supply control circuit Datasheet

IP5560C
IP5560C
TOP VIEW
SWITCHED–MODE
POWER SUPPLY
CONTROL CIRCUIT
VCC 1
16
FEED FORWARD
VZ 2
15
OUTPUT (COLLECTOR)
FEEDBACK 3
14
OUTPUT (EMITTER)
GAIN 4
13
DEMAGNETISATION /
OVERVOLTAGE
MODULATOR 5
12
GND
• STABILISED POWER SUPPLY
DUTY CYCLE
6
CONTROL
11
CURRENT LIMITING
RT 7
10
REMOTE ON/OFF
• TEMPERATURE COMPENSATED REFERENCE
SOURCE
CT 8
9
EXTERNAL SYNC
FEATURES
• SAWTOOTH GENERATOR
• PULSE WIDTH MODULATOR
• REMOTE ON/OFF SWITCHING
J Package – 16 Pin Ceramic DIP
N Package – 16 Pin Plastic DIP
D Package – 16 Pin Plastic (150) SOIC
• CURRENT LIMITING
• LOW SUPPLY VOLTAGE PROTECTION
• LOOP FAULT PROTECTION
• DEMAGNETISATION/OVERVOLTAGE PROTECTION
• MAXIMUM DUTY CYCLE CLAMP
• FEED FORWARD CONTROL
• EXTERNAL SYNCHRONISATION
Order Information
Part
Number
IP5560
IP5560C
J–Pack
16 Pin
✔
✔
N–Pack
16 Pin
D–16
16 Pin
✔
✔
Temp.
Range
-55 to +125°C
0 to +70°C
Note:
To order, add the package identifier to the part number.
eg.
IP5560J
IP5560CD–16
ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated)
SUPPLY
Voltage Sourced
Current Sourced
18V
30mA
OUTPUT TRANSISTOR
TJ
TSTG
Output Current
Collector Voltage
(Pin 15)
Maximum Emitter Voltage
(Pin 14)
Operating Junction Temperature
Storage Temperature Range
Semelab plc.
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612.
Website: http://www.semelab.co.uk
E-mail: [email protected]
40mA
18V
5V
See Ordering Information
–65 to +150°C
Prelim. 4/95
IP5560C
IP5560C
DESCRIPTION
The IP5560 is a control circuit for use in switched mode power supplies. This single monolithic chip incorporates all the
control and supervisory (protection) functions required in switched mode power supplies, including an internal
temperature compensated reference source, internal reference, sawtooth generator, pulse width modulator, output stage
and various protection circuits.
BLOCK DIAGRAM
FEED
FORWARD RT
16
REFERENCE
VOLTAGE
7
CT
DEMAGNETISATION
OVER-VOLTAGE
PROTECTION
EXTERNAL
SYNC INPUT
8
9
13
0.6V
SAWTOOTH
GENERATOR
VC C
0.48V
0.6V
FEEDBACK
VOLTAGE
3
15
Collector
4
S
MODULATOR
INPUT
5
R
DUTY CYCLE
CONTROL
6
GAIN ADJUST
OUTPUTS
LATCH
14
Emitter
O1
0.6V
1kΩ
100Ω
0.6V
R
START
S
STOP
0.48V
CURRENT
LIMITING
11
2
STABILISED
SUPPLY
Vz
0.6V
10
REMOTE
ON/OFF
Semelab plc.
1
VC C
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612.
Website: http://www.semelab.co.uk
E-mail: [email protected]
16
GND
Prelim. 4/95
IP5560C
IP5560C
ELECTRICAL CHARACTERISTICS (TJ = 25°C unless otherwise stated)
Parameter
Test Conditions
Min.
IP5560
Typ. Max.
Min.
IP5560C
Typ. Max.
Units
REFERENCE SECTIONS
3.69
Internal Reference Voltage (VREF)
TJ = Over Temp. Range
3.65
3.81
3.57
3.85
3.53
±100
Temperature Coefficient of VREF
Internal Reference (VZ)
3.72
IL = –7mA
7.8
Temperature Coefficient of VZ
8.4
3.72
3.95
4.00
ppm/°C
±100
8.8
7.8
±200
8.4
V
8.8
V
ppm/°C
±200
OSCILLATOR SECTION
Frequency Range
TJ = Over Temp. Range
Initial Accuracy Oscillator
R = 5kΩ
Duty Cycle Range
fO = 20kHz
50
100k
50
5
0–90
100k
5
0–98
0–90
Hz
%
0–98
MODULATOR
Modulator Input Current
Voltage at Pin 5 = 2V
–0.2
–20
–0.2
–20
mA
–0.2
–20
–0.2
–20
µA
40
50
60
40
50
60
8
9
10.5
8
9
10.5
V
400
600
720
400
600
720
mV
–7
–15
–35
–7
–15
–35
µA
470
600
720
470
600
720
mV
–0.6
–10
–0.6
–10
TJ = Over Temp. Range
SUPERVISORY FUNCTIONS
Pin 6 Input Current
At 2V
Pin 6 Duty Cycle Limit Control
f = 15kHz to 50kHz
(for 50% Max. Duty Cycle)
Vpin6 = 0.4VZ
TJ = Over Temp. Range
Pin 1 Low Supply Voltage
Protection Thresholds
Pin 3 Feedback Loop Protection
Trip Thresholds
At 2V
Pin 3 Pull Up Current
Pin 13 Demagnetisation / OverVoltage Protection Threshold
At 0.25V
Pin 13 Input Current
Pin 16 Feed Forward Duty Cycle
Control
–20
–20
Cycle
µA
% Orig.
Voltage at Pin 16 = 2VZ
30
40
50
30
40
50
Duty
Cycle
Pin 16 Feed Forward Input
Current
TJ = Over Temp. Range
% Duty
At 16V
VCC = 18V
0.2
5
0.2
5
µA
NOTES
1) Test Conditions: VCC = 12V , TJ = 25°C unless otherwise stated
2) Tests marked TJ = Over Temp. Range apply over the full temperature range
ie.
TJ = -55 to +125°C for IP5560
TJ = 0 to +70°C for IP5560C
Semelab plc.
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612.
Website: http://www.semelab.co.uk
E-mail: [email protected]
Prelim. 4/95
IP5560C
IP5560C
ELECTRICAL CHARACTERISTICS (TJ = 25°C unless otherwise stated)
Parameter
Test Conditions
Min.
IP5560
Typ. Max.
Min.
IP5560C
Typ. Max.
Units
EXTERNAL SYNCHRONISATION
Pin 9 Off
0
0.8
0
0.8
Pin 9 On
2
VZ
2
VZ
Voltage at Pin 9 = 0V
Pin 9 Sink Current
-85
TJ = Over Temp. Range
-125
-85
-125
V
µA
REMOTE ON/OFF
Pin 10 Off
0
0.8
0
0.8
Pin 10 On
2
VZ
2
VZ
Voltage at Pin 9 = 0V
Pin 10 Sink Current
TJ = Over Temp. Range
V
-85
-125
-85
-125
µA
-2
-10
-2
-10
µA
0.7
0.8
0.7
0.8
µs
CURRENT LIMITING
Voltage at Pin 11 = 250mV
Pin 11 IIN
Single Pulse Inhibit Delay
Inhibit Delay Time for 20%
Overdrive at 30mA IOUT
Trip Levels: Shut Down, Slow Start
560
600
700
560
600
700
Trip Levels: Current Limit
400
480
500
400
480
500
9.5
6.2
mV
ERROR AMPLIFIER
Output Voltage Swing (VOH)
6.2
Output Voltage Swing (VOL)
9.5
0.7
Open Loop Gain
54
Feedback Resistor
10
Small Signal Bandwidth
60
0.7
54
60
dB
10
3
V
kΩ
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
5
V
SUPPLY VOLTAGE/CURRENT
IZ = 0 , Voltage Fed , VPIN6 = 0.5V
Supply Current (ICC)
RPIN7 = 25kΩ
TJ = Over Temp. Range
Supply Voltage (VCC)
10
10
15
15
ICC = 10mA , Current Feed
20
24
19
24
ICC = 30mA , Current Feed
20
30
20
30
mA
V
NOTES
1) Test Conditions: VCC = 12V , TJ = 25°C unless otherwise stated
2) Tests marked TJ = Over Temp. Range apply over the full temperature range
ie.
TJ = -55 to +125°C for IP5560
TJ = 0 to +70°C for IP5560C
Semelab plc.
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612.
Website: http://www.semelab.co.uk
E-mail: [email protected]
Prelim. 4/95
IP5560C
IP5560C
TYPICAL PERFORMANCE CHARACTERISTICS — ERROR AMPLIFIER
Open Loop Gain
60
-30
50
-60
40
GAIN (dB)
PHASE ANGLE (˚)
Open Loop Phase
0
-90
30
-120
20
-150
10
-180
0
1k
10k
100k
1M
10M
1k
10k
1M
100k
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
Transfer Curve of Pulse Width Modulator Duty
Cycle vs Input Voltage
Regulation vs Error Amp
Closed Loop Gain
100
R1
7
4
90
RS
= 20
R1
VO
– REGULATION (%)
RS
60
50
40
30
20
10
VREF
(3.72V)
R1
RS
1
R1
RS
V REF
70
VO
δ – DUTY CYCLE (%)
80
= 100
= 500
V
Pins 4,5
or 6
0
0
1
2
3
INPUT VOLTAGE
Semelab plc.
4
(V)
5
6
0.1
0
10
20
30
40
50
60
70
80
90
δ – ERROR AMP CLOSED LOOP GAIN
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612.
Website: http://www.semelab.co.uk
E-mail: [email protected]
Prelim. 4/95
IP5560C
IP5560C
TYPICAL PERFORMANCE CHARACTERISTICS — ERROR AMPLIFIER
Voltage / Current Fed
Supply Characteristics
Power Derating Curve
30
ICC SUPPLY CURRENT (mA)
1.25
PD MAX (W)
1.00
0.75
0.50
0.25
0.00
20
10
0
-50
-25
0
25
50
75
100 125 150
0
10
TA AMBIENT TEMPERATURE (˚C)
20
30
VCC SUPPLY VOLTAGE (V)
PD = VCC ICC + ( VCC – VZ ) IZ
+ [ ( Vpin15 – Vpin14 ) Ipin15 x δ ]
Typical Frequency Plot vs
RT and CT
Duty Cycle Sensitivity To
Feed Forward Voltage (Pin 16)
100
200
OSCILLATOR FREQUENCY (kHz)
90
δ – DUTY CYCLE (%)
80
70
60
50
40
30
20
100
R=5
kΩ
R=1
0kΩ
R=2
0kΩ
R=4
0kΩ
10
10
0
1
1.00
1.50
VPIN16 / VZ
Semelab plc.
2.00
2.50
2.00
2.50
3.00
3.50
4.00
4.50
TIMING CAPACITANCE (nF)
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612.
Website: http://www.semelab.co.uk
E-mail: [email protected]
Prelim. 4/95
IP5560C
IP5560C
TYPICAL PERFORMANCE CHARACTERISTICS — ERROR AMPLIFIER
Soft Start Min. Duty Cycle vs
R1 + R2
Current Fed
Dropping Resistor
VS
SOFT START DUTY CYCLE
(%)
80
δ max = 90%
70
RV C C
60
δ max = 70%
1
VC C
50
40
30
GND
δ max = 50%
16
δ max = 30%
δ0
20
RVCC =
10
0
1
10
30
VS – VCC
(10 to 20 mA)
See DC Electrical Characteristics For
Current Feed VCC Range
R1 + R2 (kΩ)
Graph for Determining δ max
δ max – MAXIMUM DUTY CYCLE
(%)
100
90
2
VZ
6
DUTY
CYCLE
CONTROL
80
70
R1
60
50
40
R2
30
12
20
10
0
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
R2
R1 + R2
Semelab plc.
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612.
Website: http://www.semelab.co.uk
E-mail: [email protected]
Prelim. 4/95
Similar pages