LT1166 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT1166 Datasheet PDF : 16 Pages
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LT1166
APPLICATIONS INFORMATION
Parallel Operation
Parallel operation is an effective way to get more output
power by connecting multiple power drivers. All that is
required is a small ballast resistor to ensure current
sharing between the drivers and an isolation inductor to
resistors, the FET RON resistance at 10A, and some
sagging of the power supply, the circuit of Figure 14
actually delivers 350W RMS into 8Ω. Performance photos
and a THD vs frequency plot are included in Figure 15
keep the drivers apart at high frequency. In Figure 14 one
power slice can deliver ±6A at 100VPK, or 300W RMS into
16Ω. The addition of another slice boosts the power
output to 600W RMS into 8Ω and the addition of two or
more drivers theoretically raises the power output to
through 18. Frequency compensation is provided by the
2k input resistor, 180µH inductor and the 1nF compensa-
tion capacitors. The common node in the auxiliary power
supplies is connected to amplifier output to generate the
floating ±15V supplies.
1200W RMS into 4Ω. Due to IR loss across the sense
POWER SLICE
15V
10µF
R15
390Ω
LT1004-2.5
R9*
R10*
9.1k
1k
12.5V
R14
1k
C4
0.1µF
3+ 7
6
LT1360
2–
4
VIN
–12.5V
R7*
R8*
10k
1k
LT1004-2.5
R16
390Ω
R1
100Ω
FB
2N3906
1nF
1
VTOP
SENSE+
8
180µH
ILIM+ 7
RIN
2k
LT1166
2
VIN
VOUT
3
ILIM– 6
R2
100Ω
100V
IRF230
R5
1k
C1
1µF
C2 R6
1µF 1k
R3
0.22Ω
R4
0.22Ω
R17
0.22Ω
SENSE– 5
VBOTTOM
4
R11
100Ω
L1**
0.4µH
IRF9240
1nF
FB
2N3904
–100V
–15V
10µF
110V
AC
~+
DIODE
BRIDGE
~–
C7
1000µF
35V
C8
1000µF
35V
7815
7915
R13
200Ω
C3
3300pF
15V
C5
220µF
25V
C6
220µF
25V
–15V
R12
100Ω
POWER SLICE
AUXILARY SUPPLIES
* 0.1% RESISTORS
** 4 TURNS T37-52 (MICROMETALS)
*** 6 TURNS T80-52 (MICROMETALS)
Figure 14. 350W Shaker Table Amplifier
1Ω
L3***
1.5µH
1166 • F14
10A
FAST-BLOW
VOUT
11
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