Standard temperature range for all parts is industrial (-40擄 to +85擄C).
Features
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10 to 450V input acceptance range
<1.3mA supply current
>1.0MHz clock
>20:1 dynamic range @ 500KHz
Low internal noise
General Description
The Supertex HV9120 and HV9123 are Switch Mode Power
Supply (SMPS) controller subsystems that can start and run
directly from almost any DC input, from a 12V battery to a rectified
and filtered 240V AC line. They contain all the elements required
to build a single-switch converter except for the switch, magnetic
assembly, output rectifier(s) and filter(s).
A unique input circuit allows the 912x to self-start directly from a
high voltage input, and subsequently take the power to operate
from one of the outputs of the converter it is controlling, allowing
very efficient operation while maintaining input-to-output galvanic
isolation limited in voltage only by the insulation system of the
associated magnetic assembly. A
鹵2%
internal bandgap refer-
ence, internal operational amplifier, very high speed comparator,
and output buffer allow production of rugged, high performance,
high efficiency power supplies of 50 watts or more, which can still
be over 80% efficient at outputs of 1.0W or less. The wide dynamic
range of the controller system allows designs with extremely wide
line and load variations with much less difficulty and much higher
efficiency than usual. The exceptionally wide input voltage accep-
tance range also allows much better usage of energy stored in
input dropout capacitors than with other PWM ICs. Remote on/off
controls allow either latching or nonlatching remote shutdown.
During shutdown, power required is under 6.0mW.
Applications
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Off-line high frequency power supplies
Universal input power supplies
High density power supplies
Very high efficiency power supplies
Extra wide load range power supplies
Absolute Maximum Ratings
Voltages are referenced to -V
IN
+V
IN
Input Voltage
V
DD
Device Supply Voltage
Logic Input Voltages
Linear Input Voltages
I
IN
Preregulator Input Current (continuous)
T
j
Operating Junction Temperature
Storage Temperature
Power Dissipation, PDIP
Power Dissipation PLCC
Power Dissipation SOIC
450V
15.5V
-0.3 to V
DD
+ 0.3V
-0.3 to V
DD
+ 0.3V
2.5mA
150擄 C
-65擄C to 150擄C
1000mW
1400mW
900mW
For detailed circuit and application information, please refer
to application notes AN-H13 and AN-H21 to AN-H24.
11/12/01
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability
indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to
workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the
Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.
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