Seme LAB IP3526A Advanced regulating pulse width modulator Datasheet

IP1526A SERIES
SEME
LAB
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
ADVANCED
REGULATING
PULSE WIDTH
MODULATOR
FEATURES
J Package – 18 Pin Ceramic DIP
N Package – 18 Pin Plastic DIP
D Package – 18 Pin Plastic (300) SOIC
Order Information
Part
J–Pack
N–Pack
D–18
Temp.
Number
18 Pin
18 Pin
18 Pin
Range
IP1526A
✔
-55 to +125°C
IP3526A
✔
✔
✔
0 to +70°C
Note:
To order, add the package identifier to the part number.
eg.
IP1526AJ
IP3526AD–18
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
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
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
(Each output, continuous)
Reference Load Current
200mA
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.
See Ordering Information
–65 to +150°C
(soldering, 10 seconds)
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
+300°C
Prelim. 6/95
IP1526A SERIES
SEME
LAB
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
VREF
18
+VIN
GND
17
REFERENCE
REGULATOR
15
UNDER
VOLTAGE
LOCKOUT
+VC
TO INTERNAL
CIRCUITRY
RD
RT
CT
11
14
SYNC
12
9
OUTPUT
A
OSCILLATOR
10
13
Q
S
RESET
CSOFT-
5
R
+ERROR
–ERROR
+CS
–CS
S Q
3
Q
Q
4
START
COMPENSATION
T
MEMORY
F/F
TOGGLE
F/F
OUTPUT
B
16
D
+VIN
Q
1
METERING
F/F
2
AMP
7
6
8
SHUTDOWN
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
–5 to 20mA
Oscillator Frequency Range
1Hz to 400kHz
RT
Oscillator Timing Resistor
2kΩ to 150kΩ
CT
Oscillator Timing Capacitor
470pF to 20µF
3% to 50%
Available Deadtime Range @ 40kHz
Operating Ambient Temperature Range
Semelab plc.
IP1526A
IP3526A
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
–55 to +125°C
0 to +70°C
Prelim. 6/95
IP1526A SERIES
SEME
LAB
ELECTRICAL CHARACTERISTICS (TJ = Over Operating Temperature Range unless otherwise stated)
Parameter
Test Conditions
Min.
IP1526A
Typ. Max.
Min.
IP3526A
Typ. Max.
Units
REFERENCE SECTION
Output Voltage
TJ = 25°C
Line Regulation
Load Regulation
5.0
5.1
10
2
15
5
10
5
20
15
50
15
50
mV
4.9
5.0
5.1
4.85
5.0
5.15
V
30
80
140
30
80
140
mA
0.2
0.4
0.2
0.4
4.95
5.0
5.05
VIN = 8 to 35V
2
IL = –5 to 20mA
Temperature Stability
Total Output Voltage Range
Short Circuit Current
VREF = 0
4.9
V
mV
UNDERVOLTAGE LOCKOUT
RESET Output Voltage
VREF = 3.8V
VREF = 4.8V
2.4
2.4
4.8
V
4.8
OSCILLATOR SECTION 2
Initial Accuracy
TJ = 25°C
±3
±8
±3
±8
Voltage Stability
VIN = 8 to 35V
0.5
1
0.5
1
1
3
1
6
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
100
400
400
700
3
0.3
700
3
3.5
0.3
1
%
Hz
kHz
3.5
V
1
ERROR AMPLIFIER SECTION 3
Input Offset Voltage
RS ≤ 2kΩ
Input Bias Current
2
5
2
10
–350
–1000
–350
–2000
35
100
35
200
Input Offset Current
DC Open Loop Gain
High Output Voltage
Low Output Voltage
RL ≥ 10MΩ
VPIN1 – VPIN2 ≥ 150mV
ISOURCE = 100µA
mV
nA
64
72
60
72
dB
3.6
4.2
3.6
4.2
V
VPIN1 – VPIN2 ≥ 150mV
0.2
ISINK = 100µA
0.2
0.4
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 IP1526A
TJ = –55 to +125°C
for IP3526A
TJ = 0 to +70°C
Semelab plc.
2. Oscillator / PWM Section Test Conditions:
fOSC = 40kHz
(RT = 4.12kΩ ±1% , CT = 0.01µF ±1%, RD = 0)
3. Error Amplifier Section Test Condition:
VCM = 0 to 5.2V
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 6/95
IP1526A SERIES
SEME
LAB
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
IP1526A
Typ. Max.
Min.
IP3526A
Typ. Max.
Units
2
0
0
45
49
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
-200
VIL = 0.4V
-225
-360
-225
-360
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
14
20
14
20
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.
VC = 15V unless otherwise stated.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 6/95
IP1526A SERIES
SEME
LAB
APPLICATIONS INFORMATION
Push–Pull Configuration
Single–Ended Configuration
Q1
+VSUPPLY
+VSUPPLY
TO OUTPUT FILTER
R1
R1
R2
C1
14
14
T1
+VC
A
13
IP1526A
A
13
R2
C2
B
GND
+VC
Q1
IP1526A
Q2
16
B
R3
GND
15
16
15
RETURN
RETURN
Driving N–Channel Power MOSFETs
+15V
75Ω
14
Q1
+VC
T1
A
13
IP1526A
Q2
B
GND
16
15
RETURN
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 6/95
IP1526A SERIES
SEME
LAB
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 (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 6/95
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