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LT1166CS8 Datasheet(PDF) 8 Page - Linear Technology

Part # LT1166CS8
Description  Power Output Stage Automatic Bias System
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1166CS8 Datasheet(HTML) 8 Page - Linear Technology

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8
LT1166
APPLICATIONS INFORMATION
APPLICATION CIRCUITS
Bipolar Buffer
Similar to the unity gain buffer in Figure 1, the LT1166 can
be used to bias bipolar transistors as shown in Figure 8.
The minimum operating voltage for the LT1166 is
±2V, so
it is necessary to bias the part with adequate voltage from
the output stage. The simplest way to do this is to use
Darlington drivers and series diodes. There are no thermal
tracking circuits or adjustments necessary and the LT1166
does not need to be mounted on the heat sink with the
power devices. RTOP and RBOTTOM can be used to replace
ITOP and IBOTTOM; see Typical Characteristics curves.
Figure 8. Bipolar Buffer Amp
Figure 7. Current Source Drive
8
7
3
6
5
SENSE+
ILIM
+
VOUT
ILIM
–
SENSE–
LT1166
VTOP
VBOTTOM
1
Ω
1
Ω
VOUT
4
1
M2
M1
V+
V–
VIN
VIN
RIN
2
1166 • F07
IT
IB
RL
RF
CF
8
7
3
6
5
SENSE+
ILIM
+
VOUT
ILIM
–
SENSE–
LT1166
VTOP
VBOTTOM
100
Ω
1
Ω
1
Ω
150
Ω
150
Ω
10
Ω
VOUT
4
IBOT =
15mA
1
ITOP =
15mA
100
Ω
2N2222
47
Ω
100
Ω
2N2222
220
µF
2N2907
47
Ω
100
Ω
2N2907
+
220
µF
–15V
15V
5.6k
VIN
VIN
4.7k
2
1166 • F08
500pF
TIP29
2N2222
IN4001
IN4001
500pF
TIP30
2N2907
RTOP
RBOTTOM



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