LT1161CSW Linear Technology, LT1161CSW Datasheet

IC MOSFET DRIVER N-CH QUAD20SOIC

LT1161CSW

Manufacturer Part Number
LT1161CSW
Description
IC MOSFET DRIVER N-CH QUAD20SOIC
Manufacturer
Linear Technology
Datasheet

Specifications of LT1161CSW

Configuration
High-Side
Input Type
Non-Inverting
Delay Time
220µs
Number Of Configurations
4
Number Of Outputs
4
Voltage - Supply
8 V ~ 48 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
20-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Peak
-
High Side Voltage - Max (bootstrap)
-
Other names
LT1161CS

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1161CSW
Manufacturer:
LTNEAR
Quantity:
20 000
Part Number:
LT1161CSW#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT1161CSW#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
INPUTS
24V
Industrial Control
Avionics Systems
Automotive Switches
Stepper Motor and DC Motor Control
Electronic Circuit Breaker
8V to 48V Power Supply Range
Protected from – 15V to 60V Supply Transients
Fully Enhances N-Channel MOSFET Switches
Individual Short-Circuit Protection
Individual Automatic Restart Timers
Programmable Current Limit, Delay Time, and
Auto-Restart Period
Voltage-Limited Gate Drive
Defaults to OFF State with Open Input
Flowthrough Input to Output Pinout
Available in 20-Lead DIP or SOL Package
0.1µF
0.1µF
C
0.1µF
0.1µF
T
Figure 1. Protected Quad High-Side Switch
T1
T2
T3
T4
IN1
IN2
IN3
IN4
GND
GND
V
+
LT1161
U
V
+
DS1
DS2
DS3
DS4
G1
G2
G3
G4
U
IRFZ34
IRFZ34
IRFZ34
IRFZ34
0.01Ω
0.01Ω
0.01Ω
0.01Ω
R
S
LOAD
LOAD
LOAD
LOAD
#1
#2
#3
#4
+
1161 F01
50µF
50V
DESCRIPTIO
Quad Protected High-Side
The LT1161 is a quad high-side gate driver allowing the
use of low cost N-channel power MOSFETs for high-side
switching applications. It has four independent switch
channels, each containing a completely self-contained
charge pump to fully enhance an N-channel MOSFET
switch with no external components.
Also included in each switch channel is a drain sense
comparator that is used to sense switch current. When a
preset current level is exceeded, the switch is turned off.
The switch remains off for a period of time set by an
external timing capacitor and then automatically attempts
to restart. If the fault is still present, this cycle repeats until
the fault is removed, thus protecting the MOSFET.
The LT1161 has been specifically designed for harsh
operating environments such as industrial, avionics, and
automotive applications where poor supply regulation
and/or transients may be present. The device will not
sustain damage from supply voltages of –15V to 60V.
All other trademarks are the property of their respective owners.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
0
Switch Drop vs Load Current
1
U
LOAD CURRENT (A)
2
MOSFET Driver
3
4
1161 TA01
5
LT1161
1161fa
1

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LT1161CSW Summary of contents

Page 1

... The device will not sustain damage from supply voltages of –15V to 60V. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. + 50µF ...

Page 2

... 24V, (V – 1000pF SENSE GATE Note 2: Both V ground pins (1, 10) must be connected together INFORMATION ORDER PART TOP VIEW NUMBER + SENSE 1 LT1161CN 3 18 GATE 1 LT1161CSW 4 17 SENSE 2 LT1161IN 5 16 GATE 2 LT1161ISW 6 15 SENSE GATE 3 8 SENSE GATE PACKAGE 20-LEAD PLASTIC SO θ ...

Page 3

W U TYPICAL PERFORMANCE CHARACTERISTICS Supply Current ALL CHANNELS ALL CHANNELS OFF INPUT VOLTAGE (V) 1161 G01 Supply Current ...

Page 4

LT1161 PIN FUNCTIONS Supply Pins: The two supply pins are internally connected and must also be externally connected. In addition to providing the operating current for the LT1161, the supply pins also serve as the Kelvin connection ...

Page 5

U OPERATIO (Each Channel, Refer to Functional Diagram) The LT1161 gate pin has two states, OFF and ON. In the OFF state it is held low, while in the ON state it is pumped to 12V above supply by a ...

Page 6

LT1161 U U APPLICATIONS INFORMATION Drain Sense Configuration The LT1161 uses supply-referenced current sensing. One input of each channel’s current-sense comparator is con- nected to a drain sense pin, while the second input is offset 65mV below the supply bus ...

Page 7

U U APPLICATIONS INFORMATION spike can play havoc with the power supply and false trip the current-sense comparator. Turn-on ∂V/∂t is controlled by the addition of the simple network shown in Figure 6. This network takes advantage of the fact ...

Page 8

LT1161 U U APPLICATIONS INFORMATION Low Voltage/Wide Supply Range Operation When the supply is <12V, the LT1161 charge pumps do not produce sufficient gate voltage to fully enhance stan- dard N-channel MOSFETs. For these applications, logic- level MOSFETs can be ...

Page 9

U U APPLICATIONS INFORMATION 8V TO 24V 1N4148 + + V V DS1 T1 51Ω 1µF G1 LT1161 2N2222 1N4744 51Ω DS2 T2 1µF G2 1/2 2N2222 LT1013 51Ω Figure 9b. Low-Side Drivers with Two Approaches for Source Current Sensing ...

Page 10

LT1161 U TYPICAL APPLICATIONS Protected Quad 1A Automotive Solenoid Driver with Overvoltage Shutdown 0.33µF 0.33µF 0.33µF INPUTS 0.33µF Protected Quad Switch with Mixed Low- and High-Side Driving 10µF + 0.33µF 0.33µF HIGH-SIDE DRIVER INPUTS (SEE NOTE 1) 2k LOW-SIDE DRIVER ...

Page 11

... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .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 12

... QFN and 28-Pin SSOP www.linear.com ● .496 – .512 NOTE .394 – .419 (10.007 – 10.643) N .037 – .045 (0.940 – 1.143) .004 – .012 (0.102 – 0.305) S20 (WIDE) 0502 LT 0406 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1994 1161fa ...

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