HV9906 Supertex Inc, HV9906 Datasheet - Page 3

• Manufacturer Part Number: HV9906
• Description: Simple Off-Line/PFC & >9V DC/DC Switcher
• Manufacturer: Supertex Inc

Pinout
__________________________________________________________________________________________________________________
Functional Block Diagram
AGND
+Vin
Von
Vdd
AGND
+Vin
Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: [phone] FAX: [phone] www.supertex.com
Von
Vdd
1
2
3
4
High Voltage
Regulator
HV9906
UVLO
and
POR
Reset Pulse
Bandgap
Reference
Delay
8
7
6
5
1V
1V
Vref
Sample Pulse
PGND
GATE
NS
PS
C
C
3
Vdd
Delay
Vdd
Pin Description
+V
V
from +V
V
supply pin for the internal circuits. It must be bypassed with a low
ESR capacitor to provide a low impedance path for the gate drive
and be capable of storing sufficient energy so that the voltage does
not decay below the UVLO threshold during the time when the
input voltage is below the minimum required by the regulator.
AGND – This pin is the common connection for analog circuits.
GATE – This pin is the output for driving the gate of an external N-
channel MOSFET.
PGND – This is the common connection for the GATE drive circuit.
NS – This pin is the negative terminal of the differential sense
feedback circuit.
PS – This pin is the positive terminal of the differential sense
feedback circuit.
ON
DD
IN
VCO
–The voltage applied to this pin by a resistor voltage divider
– This pin is the output of the internal linear regulator and the
– This pin is the input to the internal linear regulator.
IN
controls the on time (pulse width) of the gate output.
1V
Vdd
Vref
Q
_
R
S
Q
Driver
HV9906
GATE
PGND
NS
PS
07/23/02