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Can drive external MOSFETs for larger loads
General Description
The Supertex HV450 is a PWM high voltage ring generator. The
high voltage output P- and N-channel transistors are controlled
independently by the logic inputs P
IN
and N
IN
. For application
where a single control pin (N
IN
) is desired, the mode pin should
be connected to Gnd. This adds a 200ns deadband on the
control logic to avoid cross conduction on the high voltage
output. A logic high on N
IN
will turn the high voltage P-Channel on
and the N-Channel off. The outputs can drive up to 5 RENs. The
HV450 can drive external MOSFETs for applications requiring
larger loads. The IC can be powered down by connecting the
enable pin to V
DD
. The high voltage outputs have pulse by pulse
over current protection.
Applications
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High voltage ring generator
Set-top/Street box ring generator
Pair gain ring generator
Pin Configuration
N/C
P
GND
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
PP
P
GATE
V
PSEN
HV
OUT
V
NSEN
N
GATE
V
NN2
V
NN1
Absolute Maximum Ratings*
V
NN1
, power supply voltage
V
PP
, P-channel gate voltage supply
V
NN2
, N-channel gate voltage supply
V
DD
, logic supply
Storage temperature
Power dissipation
* All voltages referenced to ground
Mode
P
IN
-240V
-20V
V
NN1
+20V
+7.5V
-65擄C to +150擄C
600mW
N
IN
EN
V
DD
top view
SOW-16
12/13/01
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
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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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