IP1526 SERIES
4/99
Semelab plc.
E-mail:
sales@semelab.co.uk
Website:
http://www.semelab.co.uk
Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
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
+8 to +35V
+4.5 to +35V
0 to 100mA
0 to 20mA
1Hz to 400kHz
2k
to 150k
470pF to 20
μ
F
3% to 50%
–55 to +125°C
0 to +70°C
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
IP1526
IP3526
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