IP1525AJ-883B 查看數據表（PDF） - Semelab - > TT Electronics plc
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IP1525AJ-883B Datasheet PDF : 6 Pages
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SEME
LAB
IP1525A SERIES
IP1527A SERIES
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”.
BLOCK DIAGRAM
15
+VIN
12
GND
3
SYNC
6
RT
5
CT
7
DISCHARGE
REFERENCE
REGULATOR
VREF
16
U.V.
LOCKOUT
TO INTERNAL
CIRCUITRY
OSC. OUTPUT
4
FLIP
FLOP
Q
OSCILLATOR
Q
9
COMPENSATION
INV. 1
INPUT
2
N.I.
INPUT
8
SOFT START
10
SHUTDOWN
+VIN
ERROR
AMP
5kΩ
PWM
R
S
LATCH
50µA
VREF
5kΩ
VC
13
11
OUTPUT A
14
OUTPUT B
IP1525A OUTPUT STAGE
VC
13
11
OUTPUT A
14
OUTPUT B
IP1527A OUTPUT STAGE
RECOMMENDED OPERATING CONDITIONS
VIN
Input Voltage
Collector Voltage
Sink/Source Load Current (Steady State)
Sink/Source Load Current (Peak)
Reference Load Current
Oscillator Frequency Range
RT
Oscillator Timing Resistor
CT
Oscillator Timing Capacitor
Deadtime Resistor Range
Operating Ambient Temperature Range
IP1525A / IP1527A
IP3525A / IP3527A
Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
+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
Prelim. 3/95
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