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dc1622af
DEMO MANUAL DC1622A
TRACKING POWER SUPPLY DESIGN
The demo board can be modified easily into a tracking
supply design. Remove R6, R12 from the board and
solder the resistor R13 onto the board. R13 should be
less than 250k to minimize errors in the resultant output
voltage caused by the ADJP/N pin bias current. The output
voltage is:
V
OUTP
= 1.22 + 2.44/R13
×
R
TOP
(V)
V
OUTN
= –1.22 – 2.44/R13
×
R
BOT
(V)
Use a variable resistor in series with a fixed value resistor
if the output voltage is adjustable.
Figure 2. Tracking Power Supply Design
