LAB
SEME
IP1526A SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 6/95
ADVANCED
REGULATING
PULSE WIDTH
MODULATOR
FEATURES
Low drain current
8 to 35V operation
High performance 5V 1% reference
Low t.c. 1Hz to 400kHz oscillator range
Dual 100mA source/sink outputs
Digital current limiting
Double pulse suppression
Programmable deadtime
Accurate current limit sense voltage
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
+V
IN
Input Voltage
Collector Supply Voltage
Logic Inputs
Analogue Inputs
Source / Sink Load Current
(Each output, continuous)
Reference Load Current
Logic Sink Current
P
D
Power Dissipation
T
A
= 25C
Derate @ T
A
> 50C
P
D
Power Dissipation
T
C
= 25C
Derate @ T
C
> 25C
T
J
Operating Junction Temperature
T
STG
Storage Temperature Range
T
L
Lead Temperature
(soldering, 10 seconds)
+40V
+40V
0.3 to +5.5V
0.3 to +V
IN
200mA
Internally Limited
15mA
1W
10mW/C
3W
24mW/C
See Ordering Information
65 to +150C
+300C
ABSOLUTE MAXIMUM RATINGS
(T
case
= 25C unless otherwise stated)
TOP VIEW
J Package 18 Pin Ceramic DIP
N Package 18 Pin Plastic DIP
D Package 18 Pin Plastic (300) SOIC
8
1
2
3
4
5
6
7
14
13
12
11
10
9
15
16
17
18
V
REF
OUTPUT B
GROUND
OUTPUT A
+ERROR
ERROR
COMPENSATION
SOFTSTART
C
RESET
+CURRENT SENSE
CURRENT SENSE
SHUTDOWN
C
TIMING
R
TIMING
R
DEADTIME
+V
IN
COLLECTOR
+V
SYNC
Part JPack
NPack
D18
Temp.
Number
18 Pin
18 Pin
18 Pin
Range
IP1526A
-55 to +125C
IP3526A
0 to +70C
Order Information
Note:
To order, add the package identifier to the part number.
eg.
IP1526AJ
IP3526AD18
LAB
SEME
IP1526A SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 6/95
Q
T
Q
TOGGLE
F/F
S
Q
R
MEMORY
F/F
17
15
18
12
D
S Q
Q
METERING
F/F
5
4
2
1
9
10
T
C
11
3
6
+V
IN
OSCILLATOR
T
R
SYNC
UNDER
VOLTAGE
LOCKOUT
REFERENCE
REGULATOR
GND
TO INTERNAL
CIRCUITRY
REF
V
IN
+V
D
R
SOFT-
START
C
RESET
COMPEN-
SATION
+ERROR
ERROR
7
C
S
+C
S
SHUTDOWN
8
AMP
OUTPUT
A
OUTPUT
B
13
16
14
+V
C
+8 to +35V
+4.5 to +35V
0 to 100mA
5 to 20mA
1Hz to 400kHz
2k
to 150k
470pF to 20
F
3% to 50%
55 to +125C
0 to +70C
RECOMMENDED OPERATING CONDITIONS
V
IN
Input Voltage
Collector Voltage
Sink/Source Load Current (Each Output)
Reference Load Current
Oscillator Frequency Range
R
T
Oscillator Timing Resistor
C
T
Oscillator Timing Capacitor
Available Deadtime Range @ 40kHz
Operating Ambient Temperature Range
IP1526A
IP3526A
DESCRIPTION
The IP1526A series of high performance pulse width modulator circuits is a direct replacement for the IP1526 series in all
applications and features improved performance in several key areas. Functions included are a temperature compensated voltage
reference, sawtooth oscillator, error amplifier, PWM comparator, pulse metering and steering logic, and two low impedance power
drivers. Also included are protective features such as soft-start, undervoltage lockout, digital current limiting, double pulse inhibit, a
data latch for single pulse metering, adjustable dead-time and provision for symmetry correction inputs. For ease of interface, all digital
control ports are TTL and 9-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
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
Total Output Voltage Range
Short Circuit Current
RESET Output Voltage
Initial Accuracy
Voltage Stability
Temperature Stability
Minimum Frequency
Maximum Frequency
Sawtooth Peak Voltage
Sawtooth Valley Voltage
Input Offset Voltage
Input Bias Current
Input Offset Current
DC Open Loop Gain
High Output Voltage
Low Output Voltage
Common Mode Rejection
Supply Voltage Rejection
T
J
= 25C
V
IN
= 8 to 35V
I
L
= 5 to 20mA
V
REF
= 0
V
REF
= 3.8V
V
REF
= 4.8V
T
J
= 25C
V
IN
= 8 to 35V
R
T
= 150k
C
T
= 0.2
F
R
T
= 2k
C
T
= 470pF
V
IN
= 35V
V
IN
= 8V
R
S
2k
R
L
10M
V
PIN1
V
PIN2
150mV
I
SOURCE
= 100
A
V
PIN1
V
PIN2
150mV
I
SINK
= 100
A
R
S
2k
V
IN
= 12V to 18V
LAB
SEME
IP1526A SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 6/95
IP1526A
IP3526A
Parameter
Test Conditions
Min.
Typ.
Max.
Min.
Typ.
Max.
Units
ELECTRICAL CHARACTERISTICS
(T
J
= Over Operating Temperature Range unless otherwise stated)
4.9
5.0
5.1
2
15
5
20
15
50
4.85
5.0
5.15
30
80
140
0.2
0.4
2.4
4.8
3
8
0.5
1
1
6
100
400
700
3
3.5
0.3
1
2
10
350
2000
35
200
60
72
3.6
4.2
0.2
0.4
70
94
66
80
4.95
5.0
5.05
2
10
5
10
15
50
4.9
5.0
5.1
30
80
140
0.2
0.4
2.4
4.8
3
8
0.5
1
1
3
100
400
700
3
3.5
0.3
1
2
5
350
1000
35
100
64
72
3.6
4.2
0.2
0.4
70
94
66
80
V
mV
mV
V
mA
V
%
Hz
kHz
V
mV
nA
dB
V
V
dB
REFERENCE SECTION
OSCILLATOR SECTION
2
UNDERVOLTAGE LOCKOUT
ERROR AMPLIFIER SECTION
3
NOTES
1. Test Conditions unless otherwise stated:
V
IN
= 15V
T
J
= 55 to +125C
for IP1526A
T
J
= 0 to +70C
for IP3526A
2. Oscillator / PWM Section Test Conditions:
f
OSC
= 40kHz
(R
T
= 4.12k
1% , C
T
= 0.01
F 1%, R
D
= 0)
3. Error Amplifier Section Test Condition:
V
CM
= 0 to 5.2V
V
PIN2
V
PIN1
150mV
V
PIN1
V
PIN2
150mV
I
SOURCE
= 40
A
I
SINK
= 3.6mA
V
IH
= 2.4V
V
IL
= 0.4V
R
S
50
RESET = 0.4V
RESET = 2.4V
I
SOURCE
= 20mA
I
SOURCE
= 100mA
I
SINK
= 20mA
I
SINK
= 100mA
V
C
= 40V
C
L
= 1000pF
C
L
= 1000pF
V
IN
= 35V
R
T
= 4.12k
SHUTDOWN = 0.4V
Minimum Duty Cycle
Maximum Duty Cycle
HIGH Output Voltage
LOW Output Voltage
HIGH Input Current
LOW Input Current
Sense Voltage
Input Bias Current
Error Clamp Voltage
C
S
Charging Current
HIGH Output Voltage
LOW Output Voltage
Collector Leakage
Rise Time
Fall Time
Standby Current
IP1526A
IP3526A
Parameter
Test Conditions
Min.
Typ.
Max.
Min.
Typ.
Max.
Units
0
45
49
2.4
4.0
0.2
0.4
-125
-200
-225
-360
80
100
120
-3
-10
0.1
0.4
50
100
150
12.5
13.5
12
13
0.2
0.3
1.2
2.0
50
150
0.3
0.6
0.1
0.2
14
20
0
45
49
2.4
4.0
0.2
0.4
-125
-200
-225
-360
90
100
110
-3
-10
0.1
0.4
50
100
150
12.5
13.5
12
13
0.2
0.3
1.2
2.0
50
150
0.3
0.6
0.1
0.2
14
20
%
V
A
mV
A
V
A
V
V
A
s
mA
LAB
SEME
IP1526A SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 6/95
NOTES
1. Test Conditions unless otherwise stated:
V
IN
= 15V
T
J
= 55 to +125C
for IP1526
T
J
= 0 to +70C
for IP3526
2. Oscillator / PWM Section Test Conditions:
f
OSC
= 40kHz
(R
T
= 4.12k
, C
T
= 0.01
F 1%, R
D
= 0)
3. Error Amplifier Section Test Conditions:
V
CM
= 0 to 5.2V
4. Current Limit Comparator Section Test Conditions:
V
CM
= 0 to 12V
5. Output Driver Section Test Conditions:
V
C
= 15V unless otherwise stated.
ELECTRICAL CHARACTERISTICS
(T
J
= Over Operating Temperature Range unless otherwise stated)
PWM COMPARATOR
2
DIGITAL PORTS (SYNC, SHUTDOWN & RESET)
CURRENT LIMIT COMPARATOR
4
SOFTSTART SECTION
OUTPUT DRIVERS (each output)
5
POWER CONSUMPTION
14
A
B
IP1526A
+V
C
GND
15
13
16
75
RETURN
T1
Q1
Q2
+15V
LAB
SEME
IP1526A SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 6/95
APPLICATIONS INFORMATION
14
A
B
IP1526A
+V
C
GND
15
13
16
+V
SUPPLY
R1
RETURN
R2
C2
R3
C1
Q1
Q2
T1
TO OUTPUT FILTER
14
R2
A
B
IP1526A
+V
C
GND
15
R1
13
16
+V
SUPPLY
RETURN
Q1
PushPull Configuration
Driving NChannel Power MOSFETs
SingleEnded Configuration
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