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参数资料
| 型号： | LTC4216CMS#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/26页 |
| 文件大小： | 311K |
| 描述： | IC CNTRLR HOT SWAP 10-MSOP |
| 标准包装： | 2,500 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | 2.3 V ~ 6 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 带卷 (TR) |
LTC4216
9
4216fa
For more information www.linear.com/LTC4216
applicaTions inForMaTion
Hot Circuit Insertion
When circuit boards are inserted into a live backplane, the
supply bypass capacitors can draw huge transient current
from the power bus as they charge. Potentially, the flow
of current could damage the connector pins and glitch
the power bus, causing other boards in the system to
reset. The LTC4216 is designed to turn on or off a circuit
board supply in a controlled manner, allowing insertion
or removal without glitches or connector damage.
Overview of LTC4216 Features
1. Allows safe board insertion and removal from a live
backplane.
2. Controls load voltages from 0V to 6V.
3. High side gate drive for external N-channel MOSFET.
4. Adjustable soft-start with inrush current limiting for
large load capacitor during start-up.
5. Adjustable analog current limit (ACL) with circuit
breaker fault time-out during an overcurrent fault condi-
tion. No external gate capacitor is required for the ACL
loop compensation.
6. Electronic circuit breaker tripping at 25mV across the
sense resistor. The response time is adjustable through
an external capacitor at the FILTER pin.
7. Provides an ON pin to turn on and off the device. This can
also be used to reset the device after a circuit breaker trip.
8. Provides output supply voltage monitoring through the
FB pin and signals the RESET pin output.
9. Provides fault status output.
ON Control
The ON pin has two hysteretic comparators with differ-
ent threshold levels (0.8V and 0.4V) and they serve two
purposes:
1. Turn on the device if the ON pin voltage > 0.8V for more
than 6祍 and turn it off if the ON pin voltage < 0.72V for
more than 15祍.
2. Reset the device if the ON pin voltage < 0.4V for more
than 30祍 after a circuit breaker trip.
There are various methods of setting the ON pin
voltage:
1. Tie the ON pin to the load supply (V
IN
) through a 10k
pull-up resistor.
2. Drive the ON pin with an ON/OFF logic signal from the
system controller.
3. Connect an external resistive divider at the ON pin.
This divider can be used to set a higher value for the load
supply undervoltage lockout voltage than the internal V
CC
undervoltage lockout circuit.
For example, as shown in Figure 17, if both V
CC
and
SENSEP pins are connected to a 5V load supply, choosing
the resistive divider values, R1 = 20k, R2 = 80.6k, turns on
the device when the load supply voltage reaches around
80% of its final value.
V
CC
Undervoltage Lockout
A hysteretic comparator, UVLO, monitors bias supply (V
CC
)
for undervoltage. The thresholds are defined by V
CC(UVL)
(2.12V) and its hysteresis, 擵
CC(UVL,HYST)
(120mV). When
V
CC
rises above V
CC(UVL)
, the device is enabled. When
V
CC
falls below (V
CC(UVL)
擵
CC(UVL,HYST)
), the device is
disabled and GATE is pulled low. If V
CC
cycles below this
threshold for more than 200祍, following a circuit breaker
trip, it clears the fault latch. Any bias supply glitches that
last less than 10祍 will be rejected by the UVLO glitch filter.
Timer
An external capacitor, C1, is used at TIMER pin to provide
two timing cycles for the LTC4216. The first timing cycle
is the debounce cycle when the ON pin is first turned on,
both the GATE and SS pins are held low and any short-
circuit faults are ignored by the electronic circuit breaker.
Second timing cycle is the power-good delay before the
RESET pin goes high when the FB pin voltage exceeds
0.6V and its hysteresis.
The TIMER pin sources 2礎 into C1 during the two timing
cycles and is then pulled low by an internal N-channel
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4216IDE | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 6V 12-Pin DFN EP |
| LTC4216IDE#PBF | 功能描述:IC CNTRLR HOT SWAP 12-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| LTC4216IDE#TR | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 6V 12-Pin DFN EP T/R |
| LTC4216IDE#TRPBF | 功能描述:IC CNTRLR HOT SWAP 12-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| LTC4216IMS | 制造商:LINER 制造商全称:Linear Technology 功能描述:Ultralow Voltage Hot Swap Controller |
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