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參數(shù)資料
| 型號(hào)： | LTC4216IDE#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 6/26頁 |
| 文件大?。?/td> | 311K |
| 描述： | IC CNTRLR HOT SWAP 12-DFN |
| 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)： | 無 |
| 電源電壓： | 2.3 V ~ 6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 12-WFDFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 12-DFN（4x3） |
| 包裝： | 帶卷 (TR) |
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LTC4216
6
4216fa
For more information www.linear.com/LTC4216
pin FuncTions (DE12/Package/MS Package)
RESET (Pin 1/Pin 1): Reset or Power-Good Output. Open
drain output that pulls low if the FB pin voltage falls below
its threshold (0.6V). During the start-up cycle, the RESET
pin goes high impedance at the end of the second timing
cycle after the FB pin goes above the FB threshold. This
pin requires an external pull-up to a positive supply. If an
undervoltage lockout condition occurs, the RESET pin
pulls low and ignores the FB pin voltage.
ON (Pin 2/Pin 2): ON Control Input. A rising edge above
the ON pin threshold (0.8V) initiates the start-up cycle
and turns on the external N-channel MOSFET. A falling
edge below 0.72V (80mV ON pin hysteresis) turns it off.
If this pin is pulled below 0.4V, following a circuit breaker
trip, it resets the electronic circuit breaker and fault latch.
FILTER (Pin 3/Pin 3): Fault Filter Input. Connect a capacitor
between this pin and ground to set up the fault filter delay.
This pin sources 60礎(chǔ) or sinks 2.4礎(chǔ) when the voltage
across the sense resistor exceeds 25mV or drops below
25mV respectively. The filter comparator rising threshold
is 1.253V.
TIMER (Pin 4/Pin 4): Timer Input. Connect a capacitor
between this pin and ground to set up the start-up timing
cycle duration. It also defines the RESET power-good delay
from the instant the FB pin voltage exceeds 0.6V. This pin
sources 2礎(chǔ) pull-up current during ramp up. The timer
comparator rising threshold is 1.253V.
SS (Pin 5/Not Available): Soft-Start Control Input. Con-
nect a capacitor between this pin and ground for soft-start
during power-up. It controls the GATE ramp up, limiting
the rate of change of the inrush current when the external
MOSFET turns on. If soft-start function is not used, leave
this pin unconnected.
GND (Pin 6/Pin 5): Device Ground.
FB (Pin 7/Pin 6): Output Monitor for Reset Output. A resis-
tive divider from the external MOSFETs source terminal is
tied to this pin. When the voltage at this pin drops below
0.6V, the RESET pin pulls low. The FB comparator falling
threshold is 0.602V.
GATE (Pin 8/Pin 7): Gate Drive for External N-Channel
MOSFET. An internal charge pump provides 20礎(chǔ) gate
pull-up current and sufficient gate overdrive to the external
MOSFET. An internal shunt regulator limits the GATE pin
voltage to about 6.2V (typ) above the SENSEN pin voltage.
SENSEN (Pin 9/Pin 8): Circuit Breaker Negative Sense
Input. Connect this pin to the sense resistor terminal wired
to the drain of the external N-channel MOSFET. The sense
Typical perForMance characTerisTics
I
FILT(UP)
vs Temperature
I
FILT(DN)
vs Temperature
I
SS(UP)
vs Temperature
TEMPERATURE (癈)
50
125
4216 G16
25 0
25 50 75 100
70
65
60
55
50
TEMPERATURE (癈)
50
125
4216 G17
25 0
25 50 75 100
2.8
2.6
2.4
2.2
2.0
TEMPERATURE (癈)
50
125
4216 G18
25 0
25 50 75 100
12
10
8
6
4
2
0
V
FB
= 2V
V
FB
= 0V
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