ET-KA7500 查看數據表（PDF） - Estek Electronics Co. Ltd
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ET-KA7500 Datasheet PDF : 4 Pages
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ET-KA7500
SWITCHMODE Pulse Width Modulation Control Circuit
The KA7500 is a fixed frequency, pulse width modu lation control circuit designed primarily
for SWITCHMODE power supply control.
• 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
16
1
N SUFFIX
PLASTIC
ORDERING INFORMATION
KA 7500
Plastic
KA 7500
Chip
TA = - 20° to +85°C
LOGIC DIAGRAM
56
13
output control
dead time control
oscillator
4
error amp 1
pulce steering flip
flop
1
PWM comparator
2
&
T
error amp 2
16
15
reference
regulator
3
7 12 14
Pin 7 = GND
Pin 12 = Vcc
PIN ASSIGNMENT
noninv. input 1 16 noninv. input
inv. input 2 15 inv. input
feedback 3 14 ref. output
KA
dead time control 7500 output control
8
CT 5 12 Vcc
9
11
RT 6 11 collector 2
10
gnd 7 10 emitter 2
collector 1 8 9 emitter 1
1
BEIJING ESTEK ELECTRONICS CO.,LTD
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