ET-KA7500
SWITCHMODE Pulse Width Modulation Control Circuit
The KA
7500 is a fixed frequency, pulse width modu lation control circuit designed primarily
for
SWITCHMODE power supply control.
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Complete Pulse Width Modulation Control Circuitry
On– Chip Oscillator with Master or Slave Operation
On– Chip Error Amplifiers
On– Chip 5.0 V Reference
Adjustable Deadtime Control
Uncommitted Output Transistors Rated to 500 mA Source or
Sink
Output Control for Push– Pull or Single– Ended Operation
Undervoltage Lockout
N SUFFIX
PLASTIC
16
1
ORDERING INFORMATION
KA
7500
Plastic
Chip
KA
7500
T
A
= - 20° to +85°C
LOGIC DIAGRAM
5
6
13
output control
dead time control
oscillator
PIN ASSIGNMENT
4
pulce steering flip
flop
PWM comparator
error amp 1
1
2
error amp 2
8
&
T
9
11
10
16
15
reference
regulator
noninv. input
inv. input
feedback
dead time control
C
T
R
T
gnd
collector 1
1
2
3
5
6
7
8
KA
16
15
14
12
11
10
9
7500
noninv. input
inv. input
ref. output
output control
Vcc
collector 2
emitter 2
emitter 1
3
7 12 14
Pin 7 = GND
Pin 12 = V
cc
1
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ESTEK [ Estek Electronics Co. Ltd ]
