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KA7500 Datasheet Preview

KA7500 Datasheet

single monolithic chip

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K A7500
Description
The KA7500 incorporate on a single monolithic chip all the functions required in the construction of a pulse-width-modulation control
circuit. Designed primarily for power supply control ,these devices offer the systems engineer the flexibility to tailor the power
supply control circuitry to hos application. The K A7500 contains an error amplifier , anon-chip adjustable oscillator ,a dead- time
control comparator ,pulse-steering control flip-flop ,a 5-volt, 1% precision regulator , and output-control circuits. The error amplifier
exhibits a common-mode voltage range from -0.3 volts to Vcc -2 volts .The dead time control comparator has a fixed offset that
provides approximately 5% deed time when externally altered. The on-chip oscillator may be bypassed by terminating RT (pin 6 )
to the reference output and providing a sawtooth input to Ct (pin 5) ,or it may be used to drive the common circuits in
synchronous multiple-rail power supplies . The uncommitted output transistors provide either common circuits in synchronous
Power supplier.The uncommitted output transistors provide either common-emitter or emitter-follower output capability .Each device
provides for push-pull or single-ended output operation, which may be selected throug h the outpu t - control function . Th
e architecture of these devices prohibits the possibility of either output being pulsed twice during push-pull operation.
Features
Complete PWM Power Control Circuitry
Uncommitted Outputs for 200 mA sink or Source Current
Output control Selects Singel-Ended or Push-Pull operation
Internal Circuitry Prohibits Double Pulse at Either output
Variable Dead-Time Provides Control over Total Range Internal
Regulator Provides a Stable 5-V Reference supply ,1% Circuit
Architecture Allows Easy Synchronization
Block Digram
DIP - 16
Package
BEIJING ESTEK ELECTRONICS CO.,LTD
1




Estek Electronics

KA7500 Datasheet Preview

KA7500 Datasheet

single monolithic chip

No Preview Available !

www.DataSheet4U.com
Absolute Maximum Ratings
Over Operating Free-air Temerature Range (Unless Otherwise
Noted)
Rating
Supply voltage ,Vcc
Amplifier input voltage
Collector output voltage
Collector output current
Operating free-air temperature range
Storage temperature range
Lead temperature 1,6 mm from case for 10 seconds
Recommended Operating Conditions
K A7500
Value
41
Vcc+0.3
41
250
0 to 70
-65 to 150
260
Unit
V
mA
°C
Parameter
Supply voltage ,Vcc
Amplifier input voltage ,Vi
Collector output voltage ,Vo
Collector output current (each transistor)
Current into feedback terminal
Timing capacitor ,CT
Timing resistor ,RT
Oscillator frequency
Operating free-air temperature ,TA
MIN
7
-0.3
0.0047
1.8
1
0
Value
MAX
40
Vcc-2
40
200
0.3
10
500
200
70
Unit
V
mA
µF
kΩ
kHz
°C
Electrical Characteristics
Over Operating Free-air Temerature Range,Vcc=15V,f=10kHz (Unless Otherwise
Noted)
Reference Section
Parameter
Output voltage(Vref)
Line regulation
Load regulation
Short-circuit output current***
Test conditions
Io=1mA
Io=1mA,TA=25°C****
Vcc=7V to 40V
Io=1Ma to 10mA
Vref=0
MIN
4.9
4.95
10
Value
TYP**
5
5
2
1
35
MAX
5.1
5.05
25
15
50
Unit
V
mV
mA
BEIJING ESTEK ELECTRONICS CO.,LTD
2


Part Number KA7500
Description single monolithic chip
Maker Estek Electronics
Total Page 6 Pages
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