UL1550_vel_KA33V.pdf

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KA33V
Voltage Stabilizer
Features
• Low Temperature Coefficient
• Low Dynamic Resistance
• Typical Reference Voltage of 33V
Description
The KA33V is a monolithic integrated voltage stabilizer
especially designed as voltage supplier for electronic tuners.
TO-92
1
1. Anode 2. Cathode
Schematic Diagram
●
●
●
2 C a th o d e
R4
D1
D2
D3
D4
D5
●
Q3
R3
●
●
Q2
R2
R1
1 Anode
Rev. 1.0.1
©2001 Fairchild Semiconductor Corporation
KA33V
Absolute Maximum Ratings (T
A= 25°C)
°
Parameter
Zener Current
Power Dissipation (T
A
= 75°C)
Operating Ambient Temperature Range
Storage Temperature Range
Symbol
I
Z
P
D
T
OPR
T
STG
Value
10
200
-20 ~ 75
-40 ~ 125
Unit
mA
mW
°C
°C
Electrical Characteristics (T
A
= 25°C)
°
Parameter
Stabilized Voltage
Stabilized Voltage-Temperature Drift
Dynamic Resistance
Symbol
V
Z
∆V
Z
/∆T
R
Z
Conditions
I
Z
= 5mA
I
Z
= 5mA
T
A
= -20 to 75°C
I
Z
= 5mA, f = 1KHz
Min.
31
-1
-
0
10
Typ.
Max.
35
1
25
Unit
V
mV/°C
-
2
KA33V
Measuring Circuits
IZ = 5mA
A
●
RB
2
KA33V
EB
1
v
Volt Meter
Figure 1. Measuring Circuit for Stabilized Voltage V
Z
Iz
A
●
●
●
+
50μ F
IAC =
●
Iz
10
100
RB
2
VV2
C
0.1μ F
KA33V
VV1
~
f = 1KHz
EB
1
●
●
●
Fig. 3
IZ
Vz
r
Z
=
VV
1
1
0.5mA
0 5mA
0.5mA
5mA
W1
Figure 2. Measuring Circuit for Dynamic Resistance
3
KA33V
Typical Application
Ach
●
●
●
Bch
●
Ych
●
Zch
Ri
2
C
C hannel
s e ttin g
v a r ia b l e
r e s is t o r
15K
Ω
15K
Ω
15K
Ω
KA33V
Vi
1
c
●
●
●
●
●
c
＊
t o t u n in g d io d e s ( v a r a c t o r ) in c a s e o f Y c h o n
1) UHF Tuner
●
●
●
●
●
●
●
●
●
●
TR1
●
D5
A n te n n a
TR2
D1
●
D2
●
●
D3
D4
●
TR 1 : R F A M P : K SC 1393
K S C 1 0 7 0 ( U n d e r d e v e lo p m e n t)
TR 2 : O SC : S KC 1730
D 1 - D 4 : 1 S 2 2 0 D 5 : M IX E R : 1 S S 1 6
AFC
te r m in a l
2) VHF Tuner
●
●
●
●
●
●
●
●
●
●
TR 1
●
TR 3
TR 1 : R M AM P : KSC 1393
T R 2 : M IX E R
TR3 : OSC
: K S C 1 39 4
: KSC 1730
L o w /H ig h C h a n n e l
S w itc h in g te rm in a l.
A F C te rm in a l
D 1, D 4 : 1S 2209
D 2, D 3 : 1S 2207
A n te n n a
D1
D2
D3
D4
TR 2
●
●
●
●
4
KA33V
Power-temperature Derating Durve Typical Characteristic Curves
(T
A
= 25°C)
Figure7. Allowable Dissipation vs.
Amblent Temperature
Figure8. Dynamic Resistance vs.
Zener Current
Figure9. Stabilized Voltage Temperature Drift vs.
Zener Current
Figure10. Stabilized Voliage Variation vs.
Time
Figure11. Stabilized Voltage Variation & Supply
Voltage Variation vs. Zener Current
5

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