Seme LAB IP3526 Regulating pulse width modulator Datasheet

IP1526 SERIES
TOP VIEW
+ERROR 1
18
VREF
–ERROR 2
17
+VIN
COMPENSATION 3
16
OUTPUT B
CSOFTSTART 4
15
GROUND
RESET 5
14
+VCOLLECTOR
–CURRENT SENSE 6
13
OUTPUT A
+CURRENT SENSE 7
12
SYNC
SHUTDOWN 8
11
R DEADTIME
R TIMING 9
10
C TIMING
REGULATING
PULSE WIDTH
MODULATOR
FEATURES
J Package – 18 Pin Ceramic DIP
N Package – 18 Pin Plastic DIP
DW Package – 18 Pin Plastic (300) SOIC
Order Information
Part
J–Pack
N–Pack
D–18
Temp.
Number
18 Pin
18 Pin
18 Pin
Range
IP1526
✔
-55 to +125°C
IP3526
✔
✔
✔
0 to +70°C
Note:
To order, add the package identifier to the part number.
eg.
IP1526J
IP3526DW–18
•
•
•
•
•
•
•
•
•
•
•
•
•
•
8 to 35V operation
5V reference trimmed to ±1%
1Hz to 400kHz oscillator range
Dual 100mA source/sink outputs
Digital current limiting
Double pulse suppression
Programmable deadtime
Undervoltage lockout
Single Pulse metering
Programmable soft start
Wide current limit common mode range
TTL/CMOS compatible logic ports
Symmetry correction capability
Guaranteed 6 unit synchronisation
ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated)
+VIN
Input Voltage
+40V
Collector Supply Voltage
+40V
Logic Inputs
–0.3 to +5.5V
Analogue Inputs
–0.3 to +VIN
Source / Sink Load Current
200mA
Reference Load Current
Internally Limited
Logic Sink Current
15mA
PD
Power Dissipation
TA = 25°C
Derate @ TA > 50°C
1W
10mW/°C
PD
Power Dissipation
TC = 25°C
Derate @ TC > 25°C
3W
24mW/°C
TJ
Operating Junction Temperature
TSTG
Storage Temperature Range
TL
Lead Temperature
Semelab plc.
Telephone +44(0)1455 556565.
E-mail: [email protected]
See Ordering Information
–65 to +150°C
(soldering, 10 seconds)
Fax +44(0)1455 552612.
Website: http://www.semelab.co.uk
+300°C
4/99
IP1526 SERIES
DESCRIPTION
The IP1526 and IP3526 high performance monolithic pulse width modulator circuits are designed for fixed-frequency switching
regulators and other power control applications. Included in an 1 8-pin dual-in-line package are a temperature compensated voltage
reference, sawtooth oscillator, error amplifier, pulse width modulator, pulse metering and steering logic, and two low impedance power
drivers. Also included are protective features such as soft-start and under-voltage lockout, digital current limiting, double pulse inhibit, a
data latch for single pulse metering, adjustable deadtime, and provision for symmetry correction inputs. For ease of interface, all digital
control ports are TTL and B-series CMOS compatible. Active LOW logic design allows wired-OR connections for maximum flexibility.
This versatile device can be used to implement single-ended or push-pull switching regulators of either polarity, both transformerless
and transformer coupled.
BLOCK DIAGRAM
+ERROR 1
18
VREF
–ERROR 2
17
+VIN
COMPENSATION 3
16
OUTPUT B
CSOFTSTART 4
15
GROUND
RESET 5
14
+VCOLLECTOR
–CURRENT SENSE 6
13
OUTPUT A
+CURRENT SENSE 7
12
SYNC
SHUTDOWN 8
11
R DEADTIME
R TIMING 9
10
C TIMING
RECOMMENDED OPERATING CONDITIONS
VIN
Input Voltage
+8 to +35V
Collector Voltage
+4.5 to +35V
Sink/Source Load Current (Each Output)
0 to 100mA
Reference Load Current
0 to 20mA
Oscillator Frequency Range
1Hz to 400kHz
RT
Oscillator Timing Resistor
2kΩ to 150kΩ
CT
Oscillator Timing Capacitor
470pF to 20µF
Available Deadtime Range @ 40kHz
Operating Ambient Temperature Range
Semelab plc.
Telephone +44(0)1455 556565.
E-mail: [email protected]
3% to 50%
IP1526
IP3526
Fax +44(0)1455 552612.
Website: http://www.semelab.co.uk
–55 to +125°C
0 to +70°C
4/99
IP1526 SERIES
ELECTRICAL CHARACTERISTICS (TJ = Over Operating Temperature Range unless otherwise stated)
Parameter
Test Conditions
Min.
IP1526
Typ. Max.
Min.
IP3526
Typ. Max.
Units
REFERENCE SECTION
Output Voltage
TJ = 25°C
Line Regulation
Load Regulation
4.95
5.0
5.05
VIN = 8 to 35V
2
IL = 0 to 20mA
Total Output Voltage Range
Short Circuit Current
VREF = 0
V
5.0
5.1
20
2
30
5
30
5
50
15
50
15
50
mV
4.9
5.0
5.1
4.85
5.0
5.15
V
25
80
140
25
80
140
mA
0.2
0.4
0.2
0.4
Temperature Stability
4.9
mV
UNDERVOLTAGE LOCKOUT
RESET Output Voltage
VREF = 3.8V
2.4
VREF = 4.8V
4.8
2.4
4.8
V
OSCILLATOR SECTION 2
Initial Accuracy
TJ = 25°C
±3
±8
±3
±8
Voltage Stability
VIN = 8 to 35V
0.5
1
0.5
1
3
10
7
10
Temperature Stability
Minimum Frequency
RT = 150kΩ
CT = 0.2µF
Maximum Frequency
RT = 2kΩ
CT = 470pF
Sawtooth Peak Voltage
VIN = 35V
Sawtooth Valley Voltage
VIN = 8V
100
400
0.5
3.5
3
1
Hz
kHz
400
3
TJ = 25°C
100
%
3.5
1
V
ERROR AMPLIFIER SECTION 3
Input Offset Voltage
RS ≤ 2kΩ
Input Bias Current
Input Offset Current
DC Open Loop Gain
High Output Voltage
Low Output Voltage
RL ≥ 10MΩ
VPIN1 – VPIN2 ≥ 150mV
ISOURCE = 100µA
2
5
2
10
–350
–1000
–350
–2000
35
100
35
200
mV
nA
64
72
60
72
dB
3.6
4.2
3.6
4.2
V
VPIN1 – VPIN2 ≥ 150mV
0.2
ISINK = 100µA
0.4
0.2
Common Mode Rejection
RS ≤ 2kΩ
70
94
70
94
Supply Voltage Rejection
VIN = 12V to 18V
66
80
66
80
0.4
V
dB
NOTES
1. Test Conditions unless otherwise stated:
VIN = 15V
for IP1526
TJ = –55 to +125°C
for IP3526
TJ = 0 to +70°C
Semelab plc.
Telephone +44(0)1455 556565.
E-mail: [email protected]
2. Oscillator / PWM Section Test Conditions:
fOSC = 40kHz
(RT = 4.12kΩ , CT = 0.01µF ±1%, RD = 0)
3. Error Amplifier Section Test Condition:
VCM = 0 to 5.2V
Fax +44(0)1455 552612.
Website: http://www.semelab.co.uk
4/99
IP1526 SERIES
ELECTRICAL CHARACTERISTICS (TJ = Over Operating Temperature Range unless otherwise stated)
Parameter
Test Conditions
Min.
PWM COMPARATOR
Minimum Duty Cycle
VPIN2 – VPIN1 ≥ 150mV
Maximum Duty Cycle
VPIN1 – VPIN2 ≥ 150mV
IP1526
Typ. Max.
Min.
IP3526
Typ. Max.
Units
2
0
45
49
0
45
49
2.4
4.0
%
DIGITAL PORTS (SYNC, SHUTDOWN & RESET)
HIGH Output Voltage
ISOURCE = 40µA
LOW Output Voltage
ISINK = 3.6mA
HIGH Input Current
LOW Input Current
2.4
4.0
V
0.2
0.4
0.2
0.4
VIH = 2.4V
–125
–200
–125
–300
VIL = 0.4V
–225
–360
–225
–500
100
110
100
120
mV
–3
–10
–3
–10
µA
0.1
0.4
0.1
0.4
V
50
100
150
50
100
150
µA
ISOURCE = 20mA
12.5
13.5
12.5
13.5
ISOURCE = 100mA
12
13
12
13
µA
CURRENT LIMIT COMPARATOR 4
RS ≤ 50Ω
Sense Voltage
90
Input Bias Current
80
SOFT–START SECTION
Error Clamp Voltage
RESET = 0.4V
CS Charging Current
RESET = 2.4V
OUTPUT DRIVERS (each output)
HIGH Output Voltage
5
V
ISINK = 20mA
0.2
0.3
0.2
0.3
ISINK = 100mA
1.2
2.0
1.2
2.0
Collector Leakage
VC = 40V
50
150
50
150
Rise Time
CL = 1000pF
0.3
0.6
0.3
0.6
Fall Time
CL = 1000pF
0.1
0.2
0.1
0.2
18
30
18
30
LOW Output Voltage
V
µA
µs
POWER CONSUMPTION
Standby Current
VIN = 35V
RT = 4.12kΩ
SHUTDOWN = 0.4V
mA
NOTES
1. Test Conditions unless otherwise stated:
VIN = 15V
for IP1526
TJ = –55 to +125°C
for IP3526
TJ = 0 to +70°C
3. Error Amplifier Section Test Conditions:
VCM = 0 to 5.2V
4. Current Limit Comparator Section Test Conditions:
VCM = 0 to 12V
5. Output Driver Section Test Conditions:
2. Oscillator / PWM Section Test Conditions:
fOSC = 40kHz
(RT = 4.12kΩ , CT = 0.01µF ±1%, RD = 0)
Semelab plc.
Telephone +44(0)1455 556565.
E-mail: [email protected]
VC = 15V
Fax +44(0)1455 552612.
Website: http://www.semelab.co.uk
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IP1526 SERIES
APPLICATIONS INFORMATION
Push–Pull Configuration
Single–Ended Configuration
+VSUPPLY
+VSUPPLY
R1
R1
C1
14
+VC
A
IP1526
A
R2
C2
B
GND
Q1
13
R2
C2
16
R3
IP1526
Q2
16
T1
+VC
Q1
13
C1
14
T1
B
GND
R3
15
Q2
15
RETURN
RETURN
Driving N–Channel Power MOSFETs
+15V
75Ω
14
Q1
+VC
T1
A
13
IP1526
Q2
B
GND
16
15
RETURN
Semelab plc.
Telephone +44(0)1455 556565.
E-mail: [email protected]
Fax +44(0)1455 552612.
Website: http://www.semelab.co.uk
4/99
IP1526 SERIES
TYPICAL PERFORMANCE CHARACTERISTICS
Soft Start Time vs CS
Output Driver Saturation Voltage
Output Driver Deadtime vs RD Value
Oscillator Period vs RT and CT
Semelab plc.
Telephone +44(0)1455 556565.
E-mail: [email protected]
Fax +44(0)1455 552612.
Website: http://www.semelab.co.uk
4/99
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