Semelab Plc IP3525AN, IP3525AJ, IP3525ADW, IP1525AJ-883B, IP1525AJ Datasheet
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LAB
SEME
IP1525A SERIES
IP1527A SERIES
Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 3/95
REGULATING
PULSE WIDTH
MODULATORS
FEATURES
• 8 to 35V operation
• 5.1V reference trimmed to ±1%
• 100Hz to 500kHz oscillator range
• Separate oscillator sync terminal
• Adjustable deadtime control
• Internal soft start
• Input undervoltage lockout
• Latching PWM to prevent multiple pulses
• Dual source/sink output drivers
+V
IN
Input Voltage
Collector Voltage
Logic Inputs
Analogue Inputs
Output Current, Source or Sink
Reference Output Load Current
Oscillator Charging Current
P
D
Power Dissipation TA= 25°C
Derate @ TA> 50°C
P
D
Power Dissipation TC= 25°C
Derate @ TC> 25°C
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
500mA
Internally Limited
5mA
1W
10mW/°C
2W
16mW/°C
See Ordering Information
–65 to +150°C
+300°C
ABSOLUTE MAXIMUM RATINGS (T
case
= 25°C unless otherwise stated)
TOP VIEW
J Package – 16 Pin Ceramic DIP
N Package – 16 Pin Plastic DIP
D Package – 16 Pin Plastic (300) SOIC
8
1
2
3
4
5
6
7
14
13
12
11
10
9
15
16
INV. INPUT
N. I. INPUT
OSC. OUTPUT
SOFT START
DISCHARGE
SYNC
V
REF
V
IN
OUTPUT B
GROUND
SHUTDOWN
COMPENSATION
C
V
OUTPUT A
C
T
R
T
Part J–Pack N–Pack D–16 Temp.
Number 16 Pin 16 Pin 16 Pin Range
IP1525A ✔ -55 to +125°C
IP1527A ✔ -55 to +125°C
IP3525A ✔✔✔0 to +70°C
IP3527A ✔✔✔0 to +70°C
Order Information
Note:
To order, add the package identifier to the part number.
eg. IP1525AJ
IP3527AD–16
LAB
SEME
IP1525A SERIES
IP1527A SERIES
Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 3/95
Q
Q
PWM
INV.
INPUT
N.I.
INPUT
1
2
ERROR
AMP
T
T
OSCILLATOR
R
C
OSC. OUTPUT
6
5
TO INTERNAL
CIRCUITRY
V
REF
16
15
12
REFERENCE
REGULATOR
GND
+V
IN
3
SYNC
4
DISCHARGE
+V
IN
COMPENSATION
SOFT START
8
V
REF
50µA
SHUTDOWN
10
5k
Ω
U.V.
LOCKOUT
FLIP
FLOP
S
R
LATCH
OUTPUT A
V
C
11
14
13
OUTPUT B
5k
Ω
9
7
IP1525A OUTPUT STAGE
OUTPUT A
V
C
11
14
13
OUTPUT B
IP1527A OUTPUT STAGE
+8 to +35V
+4.5 to +35V
0 to 100mA
0 to 400mA
0 to 20mA
100Hz to 400kHz
2kΩ to 200kΩ
470pF to 0.1µF
0 to 500Ω
–55 to +125°C
0 to +70°C
RECOMMENDED OPERATING CONDITIONS
BLOCK DIAGRAM
V
IN
Input Voltage
Collector Voltage
Sink/Source Load Current (Steady State)
Sink/Source Load Current (Peak)
Reference Load Current
Oscillator Frequency Range
R
T
Oscillator Timing Resistor
C
T
Oscillator Timing Capacitor
Deadtime Resistor Range
Operating Ambient Temperature Range IP1525A / IP1527A
IP3525A / IP3527A
DESCRIPTION
The IP1525A and IP1527A families of PWM switching regulator control circuits offer improved performance and lower
parts count when used in designing switching power supplies. Included are 5.1 volt reference, error amplifier, adjustable
dead-time oscillator with synchronisation capability, latched PWM comparator, totem-pole output drivers, shutdown, soft
start, and undervoltage lockout.
The IP1525A and IP1527A differ only in output phasing. The IP1525A output is low when “off ”, while the IP1527A
output is high when “off”.
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