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LM320T-12 Scheda tecnica(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte LM320T-12
Spiegazioni elettronici  Series 3-Terminal Negative Regulators
Download  12 Pages
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM320T-12 Scheda tecnica(HTML) 7 Page - National Semiconductor (TI)

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Typical Applications (Continued)
Wide Range Tracking Regulator
TLH7767 – 7
Resistor tolerance of R1 and R2 determine matching of (a) and (b)
inputs
Necessary only if raw supply capacitors are more than 3
from regulators
An LM3086N array may substitute for Q1 D1 and D2 for better stability and
tracking In the array diode transistors Q5 and Q4 (in parallel) make up D2
similarly Q1 and Q2 become D1 and Q3 replaces the 2N2222
Variable Output
TLH7767 – 9
Optional Improves transient response and ripple rejection
VOUT e VSET
R1aR2
R2
SELECT R2 AS FOLLOWS
LM120-5
b
300X
LM120-12
b
750X
LM120-15
b
1k
Current Source
IOUT e 1mA a
50V
R1
TLH7767 – 8
g
15V 1 Amp Tracking Regulators
TLH7767 – 12
Performance (Typical)
Load Regulation at DIL e 1A
10 mV
1 mV
Output Ripple CIN e 3000 mF IL e 1A
100 mVrms
100 mVrms
Temperature Stability
a
50 mV
a
50 mV
Output Noise 10 Hz s f s 10 kHz
150 mVrms
150 mVrms
Resistor tolerance of R4 and R5 determine matching of (a) and
(b) outputs
Necessary only if raw supply filter capacitors are more than 2
from regulators
Light Controllers Using Silicon Photo Cells
TLH7767 – 10
Lamp brightness increases until iI e 5VR1 (iI can be set as low as 1 mA)
Necessary only of raw supply filter capacitor is more than 2
from
LM320MP
TLH7767 – 11
Lamp brightness increases until iI eiQ (1 mA) a 5VR1
Necessary only if raw supply filter capacitor is more than 2
from LM320
7


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