KA7500
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
DIP - 16
Block Digram
Package
1
BEIJING ESTEK ELECTRONICS CO.,LTD
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