參數(shù)資料
型號: LT1640HIN8#PBF
廠商: Linear Technology
文件頁數(shù): 5/16頁
文件大小: 192K
描述: IC CONTRLR HOTSWAP NEGVOLT 8-DIP
標(biāo)準(zhǔn)包裝: 50
類型: 熱交換控制器
應(yīng)用: 通用
內(nèi)部開關(guān):
電源電壓: -10 V ~ -80 V
工作溫度: -40°C ~ 85°C
安裝類型: 通孔
封裝/外殼: 8-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 8-PDIP
包裝: 管件
5
LT1640L/LT1640H
1640lhfb
PIN FUNCTIONS
U
U
UV (Pin 3): Analog Undervoltage Input. When UV is
pulled below the 1.223V high to low threshold, an under-
voltage condition is detected and the GATE pin will be
immediately pulled low. The GATE pin will remain low
until UV rises above the 1.243 low to high threshold.
The UV pin is also used to reset the electronic circuit
breaker. If the UV pin is cycled low and high following the
trip of the circuit breaker, the circuit breaker is reset and
a normal power-up sequence will occur.
V
EE
 (Pin 4): Negative Supply Voltage Input. Connect to
the lower potential of the power supply.
SENSE (Pin 5): Circuit Breaker Sense Pin. With a sense
resistor placed in the supply path between V
EE
  and
SENSE, the circuit breaker will trip when the voltage
across the resistor exceeds 50mV. Noise spikes of less
than 2祍 are filtered out and will not trip the circuit
breaker.
If the circuit breaker trip current is set to twice the normal
operating current, only 25mV is dropped across the
sense resistor during normal operation. To disable the
circuit breaker, V
EE
 and SENSE can be shorted together.
GATE (Pin 6):  Gate  Drive  Output  for  the  External
N-Channel. The GATE pin will go high when the following
start-up conditions are met: the UV pin is high, the OV pin
is low and (V
SENSE
  V
EE
) < 50mV. The GATE pin is pulled
high by a 45礎(chǔ) current source and pulled low with a
50mA current source.
DRAIN (Pin 7): Analog Drain Sense Input. Connect this
pin to the drain of the external N-channel and the V

 pin
of the power module. When the DRAIN pin is below V
PG
,
the PWRGD or PWRGD pin will toggle.
V
DD
 (Pin 8): Positive Supply Voltage Input. Connect this
pin to the higher potential of the power supply inputs and
the V
+
 pin of the power module. The input supply voltage
ranges from 10V to 80V.
BLOCK DIAGRA

+
+

+

DRAIN
1640 BD
GATE
SENSE
V
EE
V
EE
V
PG
OUTPUT
DRIVE
PWRGD/PWRGD
50mV
V
CC
V
DD
REF
REF
UV
OV
LOGIC
AND
GATE DRIVE
V
CC
 AND
REFERENCE
GENERATOR
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LT1640L 制造商:LINER 制造商全稱:Linear Technology 功能描述:Negative Voltage Hot Swap Controller