LT1166CS8 Linear Technology, LT1166CS8 Datasheet

IC BIAS SYS AUTO PWR-OUTPT 8SOIC

LT1166CS8

Manufacturer Part Number
LT1166CS8
Description
IC BIAS SYS AUTO PWR-OUTPT 8SOIC
Manufacturer
Linear Technology
Datasheet

Specifications of LT1166CS8

Configuration
High and Low Side, Synchronous
Input Type
Non-Inverting
Number Of Configurations
1
Number Of Outputs
2
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Voltage - Supply
-
Delay Time
-
Current - Peak
-
High Side Voltage - Max (bootstrap)
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1166CS8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIONS
V
TYPICAL
IN
MPS2907
MPS2222
Set Class AB Bias Currents
Eliminates Adjustments
Eliminates Thermal Runaway of I
Corrects for Device Mismatch
Simplifies Heat Sinking
Programmable Current Limit
May Be Paralleled for Higher Current
Small SO-8 or PDIP Package
Biasing Power MOSFETs
High Voltage Amplifiers
Shaker Table Amplifiers
Audio Power Amplifiers
4.3k
Figure 1. Unity Gain Buffer with Current Limit
5.6k
2
100
100
R1
R4
V
IN
APPLICATION
V
LT1166
BOTTOM
V
1 I
4 I
TOP
2N2907
2N2222
U
TOP
BOTTOM
SENSE
SENSE
I
V
I
= 15mA
LIM
LIM
OUT
47
+
= 15mA
+
47
8
5
7
3
6
300pF
300pF
U
100
100
R2
–15V
R3
1 F
1 F
15V
Q
1k
1k
IRF530
IRF9530
R
0.33
R
0.33
SENSE
SENSE
+
+
220 F
1166 • F01
+
V
1
OUT
220 F
DESCRIPTION
The LT
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.
OUTPUT
INPUT
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1166 is a bias generating system for controlling
Automatic Bias System
Unity Gain Buffer Amp Driving 1 Load
Power Output Stage
U
LT1166
1166 • TA01
1
0V
0V

Related parts for LT1166CS8

LT1166CS8 Summary of contents

Page 1

... 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. 15V + 220 F R2 ...

Page 2

... Industrial grade parts specified and tested over – and 85 C are available on special request, consult factory. Note 3: T calculated from the ambient temperature T J dissipation P according to the following formulas: D LT1166CN8 • 100 C/ LT1166CS8 • 150 C/ Note TOP BOTTOM 2 U RATINGS PACKAGE/ORDER ...

Page 3

W U TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current vs Current Source Mismatch 150 100 50mA TOP BOTTOM 4mA TOP BOTTOM –50 –100 –150 –10 –7.5 –5.0 –2.5 0 2.5 5.0 ...

Page 4

LT1166 W U TYPICAL PERFORMANCE CHARACTERISTICS Input Transconductance vs Supply Voltage 0.120 25 C 0.110 0.100 125 C – 0.090 0.080 V = 200mV –0.080 –0.090 125 ...

Page 5

U U APPLICATIONS INFORMATION Overvoltage Protection The supplies V (Pin 1) and V TOP BOTTOM diodes that turn on when they exceed 12V. These diodes act as ESD protection and serve to protect the LT1166 when used with large power ...

Page 6

LT1166 APPLICATIONS INFORMATION Similarly for V , when positive voltage is applied current that was flowing in R1 and Q1 is now supplied IN through R . This effect ...

Page 7

U U APPLICATIONS INFORMATION how tapping the sense resistors gives twice the limit current or one half the limit current. Foldback current limit can be added to the normal or “square” current limit by including two resistors (30k typical) from ...

Page 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 ...

Page 9

U U APPLICATIONS INFORMATION Adding Voltage Gain The circuit in Figure 9 adds voltage gain to the circuit in Figure 1. At low frequency the LT1166 is in the feedback INPUT OUTPUT Figure 10. Power Amp Driving ...

Page 10

... W U common mode voltage to its output. The following appli- cations utilize amplifiers operating in suspended-supply operation (Figure 13). See “Linear Technology Magazine” Volume IV Number 2 for a discussion of suspended supplies. The gain setting resistors used in suspended- supply operation must be tight tolerance or the gain will be wrong ...

Page 11

U U 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 ...

Page 12

LT1166 U U APPLICATIONS INFORMATION Figure 15. 0.3% THD at 10kHz Figure 16. Clipping at 1kHz, R 100W Audio Power Amplifier The details of a low distortion audio amplifier are shown in Figure 19. The LT1360, designated U1, ...

Page 13

U U APPLICATIONS INFORMATION W U LT1166 13 ...

Page 14

LT1166 APPLICATIONS INFORMATION 8kHz Figure 20. Square Wave Response Into 1166 • F20 20kHz Figure 21. 100W 20kHz Sine Wave and Its ...

Page 15

... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 16

... Current Feedback Amplifier LT1210 1A/40MHz Current Feedback Amplifier LT1270A 10A High Efficiency Switching Regulator LT1360 50MHz, 800V Amp LT1363 70MHz, 800V Amp C-Load is a registered trademark of Linear Technology Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 : (408) 434-0507 FAX TELEX U Dimensions in inches (millimeters) unless otherwise noted ...

Related keywords