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LT1166CN8 Datasheet

  • LT1166CN8

  • Power Output Stage Automatic Bias System

  • 16頁

  • LINER

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LT1166
Power Output Stage
Automatic Bias System
FEATURES
s
s
s
s
s
s
s
s
DESCRIPTION
The LT
廬
1166 is a bias generating system for controlling
class AB output current in high powered amplifiers. When
connected with external transistors, the circuit becomes a
unity-gain voltage follower. The LT1166 is ideally suited
for driving power MOSFET devices because it eliminates
all quiescent current adjustments and critical transistor
matching. Multiple output stages using the LT1166 can be
paralleled to obtain higher output current.
Thermal runaway of the quiescent point is eliminated
because the bias system senses the current in each power
transistor by using a small external sense resistor. A high
speed regulator loop controls the amount of drive applied
to each power device. The LT1166 can be biased from a pair
of resistors or current sources and because it operates on the
drive voltage to the output transistors, it operates on any
supply voltage.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Set Class AB Bias Currents
Eliminates Adjustments
Eliminates Thermal Runaway of I
Q
Corrects for Device Mismatch
Simplifies Heat Sinking
Programmable Current Limit
May Be Paralleled for Higher Current
Small SO-8 or PDIP Package
APPLICATIONS
s
s
s
s
Biasing Power MOSFETs
High Voltage Amplifiers
Shaker Table Amplifiers
Audio Power Amplifiers
TYPICAL APPLICATION
R1
MPS2907
100鈩?/div>
2N2907
1 I
TOP
= 15mA
5.6k
V
TOP
SENSE
+
I
LIM+
4.3k
V
IN
2
8
7
1k
1碌F
V
IN
LT1166 V
OUT
I
LIM鈥?/div>
SENSE
鈥?/div>
V
BOTTOM
4 I
BOTTOM
= 15mA
2N2222
R4
100鈩?/div>
MPS2222
47鈩?/div>
3
1碌F
1k
R
SENSE+
0.33鈩?/div>
V
OUT
R
SENSE
0.33鈩?/div>
鈥?/div>
15V
47鈩?/div>
R2
100鈩?/div>
IRF530
300pF
Unity Gain Buffer Amp Driving 1鈩?Load
+
220碌F
INPUT
1鈩?/div>
6
5
OUTPUT
R3
100鈩?/div>
300pF
鈥?5V
IRF9530
1166 鈥?TA01
220碌F
1166 鈥?F01
Figure 1. Unity Gain Buffer with Current Limit
U
+
U
U
0V
0V
1

LT1166CN8 產(chǎn)品屬性

  • LT1166

  • 50

  • 集成電路 (IC)

  • PMIC - MOSFET，電橋驅(qū)動(dòng)器 - 外部開關(guān)

  • -

  • 高端和低端，同步

  • 非反相

  • 250ns

  • -

  • 1

  • 2

  • -

  • -

  • 0°C ~ 70°C

  • 通孔

  • 8-DIP（0.300"，7.62mm）

  • 8-PDIP

  • 管件

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