參數(shù)資料
型號(hào): LTC4221IGN#TRPBF
廠商: Linear Technology
文件頁(yè)數(shù): 8/28頁(yè)
文件大?。?/td> 272K
描述: IC CTRLR HOTSWAP DUAL 16SSOP
標(biāo)準(zhǔn)包裝: 2,500
類型: 熱交換控制器
應(yīng)用: 通用
內(nèi)部開關(guān):
電源電壓: 1 V ~ 13.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 16-SSOP
包裝: 帶卷 (TR)
8
LTC4221
4221fa
U
U
PI FU CTIO S
ON1
 
(Pin 1): System/Channel 1 On Input. Both GATE pins
are pulled low by internal 100糀 pull-downs and the
FAULT latch is reset when V
ON1
< 0.4V. When 0.425V <
V
ON1
< 0.821V, the FAULT latch is released from reset.
When V
ON1
> 0.851V, GATE1 ramps up after an initial
timing cycle.
V
CC1
 (Pin 2): Channel 1 Positive Supply Input. It powers
all the internal circuitry. V
CC1
 can range from 2.7V to 13.5V
for normal operation but it must be eV
CC2
. An undervolt-
age lockout circuit disables both channels whenever the
voltage at V
CC1
 is less than 2.5V.
SENSE1 (Pin 3): Channel 1 Current Sense Input. A sense
resistor R
SENSE1
 is placed in the supply path between V
CC1
and SENSE1 to sense channel 1 load current. If V
RSENSE1
exceeds 100mV for more than 1約 or 25mV for an adjust-
able time (set by the C
FILTER
), the FAULT latch is set and
fast pull-down circuits are triggered to discharge both
GATEs
 
low. During the start-up cycle, GATE1
 
ramp-up is
controlled to servo V
RSENSE1
 d V
SENSE(ACL)
. V
SENSE(ACL)
increases from 9mV to 25mV as V
FB1
 ramps from 0V to
0.5V. To disable the current limit and circuit breaker
function for channel 1, tie SENSE1 to V
CC1
.
TYPICAL PERFOR A CE CHARACTERISTICS
W
V
PWRGD(OL)
/V
FAULT(OL)
vs Temperature
tp
(SC-FAULT)
 vs Temperature
TEMPERATURE (癈)
50
0.500
0.450
0.400
0.350
0.300
0.250
0.200
0.150
0.100
0.050
0
0
50    75
4221 G37
25
25
100   125
V
CC1
 = 2.7V
V
CC1
 = 5V
V
CC1
 = 13.5V
V
CC2
 = 1V, I
PWRGD
/I
FAULT
 = 1.6mA
tp
(FC-GATE)
 vs Temperature
TEMPERATURE (癈)
50
16
17
18
25
75
4221 G38
15
14
25    0
50
100   125
13
12
V
CC1
 = 2.7V
V
CC1
 = 5V
V
CC1
 = 13.5V
V
CC2
 = 1V
TIMER = 0.5V
TEMPERATURE (癈)
50
1.4
1.6
1.8
25
75
4221
1.2
1.0
25    0
50
100   125
0.8
0.6
V
CC1
 = 2.7V
V
CC1
 = 5V
V
CC1
 = 13.5V
V
CC2
 = 1V
TIMER = 0.5V
I
FAULT(UP)
 vs Temperature
V
FAULT(TH)
 vs V
CC1
V
FAULT(TH)
 vs Temperature
TEMPERATURE (癈)
50
3.7
3.5
3.1
25
75
4221 G34
3.9
4.1
25    0
50
100   125
4.3
4.5
3.3
V
CC1
 = 2.7V
V
CC1
 = 5V
V
CC1
 = 13.5V
V
CC2
 = 1V
V
FAULT
 = 1.5V
V
CC1
 (V)
0
0.810
0.815
0.825
0.830
0.835
0.860
0.845
4
8    10
4221 G35
0.820
0.850
0.855
0.840
2
6
12   14   16
V
CC2
 = 1V
T
A
 = 25癈
RISING
FALLING
TEMPERATURE (癈)
50
0.84
0.85
0.87
25
75
4221
0.83
0.82
25    0
50
100   125
0.81
0.80
0.86
V
CC1
 = 5V
V
CC2
 = 3.3V
RISING
FALLING
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