LT1641IS8(RevD) データシートの表示（PDF） - Linear Technology
部品番号
コンポーネント説明
メーカー
LT1641IS8 Datasheet PDF : 12 Pages
| |||
FEATURES
■ Allows Safe Board Insertion and Removal from a
Live Backplane
■ Controls Supply Voltage from 9V to 80V
■ Programmable Analog Foldback Current Limiting
■ High Side Drive for an External N-Channel
■ Automatic Retry Capability
■ User Programmable Supply Voltage Power-Up Rate
■ Undervoltage Lockout
■ Overvoltage Protection
■ Available in 8-Lead SO Package
U
APPLICATIO S
■ Hot Board Insertion
■ Electronic Circuit Breaker
■ Industrial High Side Switch/Circuit Breaker
■ 24V/48V Industrial/Alarm Systems
LT1641
Positive High Voltage
Hot Swap Controller
DESCRIPTIO
The LT®1641 is an 8-pin Hot SwapTM controller that allows
a board to be safely inserted and removed from a live
backplane. Using an external N-channel pass transistor,
the board supply voltage can be ramped up at a program-
mable rate. A high side switch driver controls an N-channel
gate for supply voltages ranging from 9V to 80V.
The chip features a programmable analog foldback cur-
rent limit circuit. If the chip remains in current limit for
more than a programmable time, the N-channel pass
transistor turns off and is optionally set to automatically
restart after a time-out delay.
The PWRGD output indicates when the output voltage,
sensed by the FB pin, is within tolerance. The ON pin
provides programmable undervoltage lockout.
The LT1641-1/LT1641-2 are recommended for new
designs.
The LT1641 is available in the 8-lead SO package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
24V Input Voltage Automatic Restart Application
VIN
24V
SHORT
PIN
R1
49.9k
1%
RS
0.01Ω
Q1
IRF530
R5
10Ω
5%
10nF
D1
CMPZ R3
5248B 59k
1%
VOUT
CL
*SMAT70A
R2
3.4k
1%
VCC SENSE GATE
ON
FB
LT1641
TIMER
PWRGD
GND
R7
24k
5%
R4
3.57k
1%
PWRGD
GND
*DIODES, INC.
C2
0.68µF
1641 TA01
1641fd
1
Share Link: 