HA17431 Series
Shunt Regulator
REJ03D0678-0300
Rev.3.00
Apr 03, 2007
Description
The HA17431 series is temperature-compensated variable shunt regulators. The main application of these products is in
voltage regulators that provide a variable output voltage. The on-chip high-precision reference voltage source can
provide 鹵1% accuracy in the V versions, which have a V
KA
max of 16 volts. The HA17431VLP, which is provided in
the MPAK-5V package, is designed for use in switching mode power supplies. It provides a built-in photocoupler
bypass resistor for the PS pin, and an error amplifier can be easily constructed on the supply side.
Features
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
The V versions provide 2.500 V 鹵1% at Ta = 25擄C
The HA17431VLP includes a photocoupler bypass resistor (2 k鈩?
The reference voltage has a low temperature coefficient
The MPAK-5V(5-pin), MPAKV(3-pin) and UPAKV miniature packages are optimal for use on high mounting
density circuit boards
Block Diagram
K
PS*
2k鈩?/div>
REF
+
鈭?/div>
A
Note: * The PS pin is only provided by the HA17431VLP.
Application Circuit Example
Switching power supply secondary-side error amplification circuit
Vout
R
R
1
K
PS
2k鈩?/div>
REF
A
HA17431VLP
R
2
GND
+
鈥?/div>
REJ03D0678-0300 Rev.3.00 Apr 03, 2007
Page 1 of 19
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