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参数资料
| 型号： | MAX16913GEE/V+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/10页 |
| 文件大小： | 0K |
| 描述： | IC CURRENT SENSE SWITCH 16QSOP |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 电流感应放大器，电流开关 |
| 电流 - 电源： | 600µA |
| 电源电压： | 5 V ~ 18 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 带卷 (TR) |
Remote Antenna Current-Sense
Amplifier and Switches
Detailed Description
The MAX16913/MAX16913A high-voltage, high-side,
current-sense switches feature internal current limiting
to prevent system damage due to fault conditions. The
MAX16913/MAX16913A input voltage range extends
from 5V to 18V, making them ideal for providing phan-
tom power to remote radio-frequency low-noise ampli-
fiers (LNAs) in automotive applications. High-side
current monitoring does not interfere with the ground
path of the load being measured, making these
The AOUT voltage is clamped to typically 4.3V in order
to avoid damage to external circuitry.
Load Protection
The MAX16913/MAX16913A monitor the load current
through an external sense resistor and perform the fol-
lowing actions:
? If the monitored current is lower than the open-load
current, the device signals open load (see the
Open Load section).
devices particularly useful in a wide range of high-volt-
?
If the monitored current is higher than the short-cir-
I LOAD ( A ) =
age battery-powered systems.
The MAX16913/MAX16913A monitor the load current
by means of a high-side current-sense amplifier and
provide an analog output voltage proportional to that
current at AOUT.
The devices combine a high-side current-sense amplifi-
er, an internal switch, a +3V bandgap reference, and
two open-drain fault indicator outputs. These features
enable the design of remote power circuits with short-
circuit, short-to-battery, and thermal protection. For the
MAX16913A, the open-load threshold is externally
adjustable using a resistive divider.
A fault-blanking feature enables the circuit to ignore
momentary faults, such as those caused by initial
charging of a capacitive load at turn-on, preventing
false alarms to the system.
The MAX16913/MAX16913A provide an active-high
control input (SHDN) to put the devices in low-power
shutdown mode.
Current-Sense Amplifier
The integrated current-sense amplifier is a differential
amplifier that amplifies the voltage between V IN and
V SENS . A sense resistor (0.65 Ω min, 4.7 Ω max), R SENSE ,
is connected across V IN and V SENS . When the load
current passes through the sense resistor, a voltage
drop develops across it. The current-sense amplifier
amplifies this voltage.
The current-sense amplifier features an internally fixed
gain of 13V/V (typ). The following equations show the
relationship between the current-sense amplifier output
voltage (AOUT) and load current:
(V IN - V SENS )(V)
R SENSE ( Ω )
V AOUT ( V ) = [ A V (V/V) × (V IN - V SENS )(V) ] + 0.4V
AOUT is the output of an internal buffer with a 5k Ω out-
put impedance.
cuit current (I SC ), the device enters the short-circuit
mode (see the Short Circuit section).
The devices also perform a short-to-battery detection
every time the internal switch turns on (see the Short-to-
Battery Detection section). In addition, thermal shut-
down protects the MAX16913/MAX16913A from
overheating (see the Thermal Shutdown section). Two
open-drain outputs ( OL and SC ) indicate the device
status (see Table 1).
Open Load
If the load current drops below the open-load current
threshold, the OL output asserts low. An open-load
condition does not turn off the internal switch. The
MAX16913 provides an internally fixed open-load
threshold, while the MAX16913A features an adjustable
open-load threshold.
For the MAX16913, when (V IN - V SENS ) drops below
20mV (typ), the device signals open load.
For the MAX16913A, using a resistive divider between
REF, the open-load threshold adjustment pin (OLT),
and GND sets the open-load threshold (see the Open-
Load Threshold Selection section).
Short Circuit
If the load current reaches the short-circuit current
threshold (I SC ), the t BLANK timer begins counting.
During this period, the load current is limited to a value
of twice the short-circuit current threshold (2 x I SC ). If
the short-circuit condition is present for t BLANK , SC
asserts low and the internal switch turns off. The timer
resets if the short-circuit condition disappears before
the blanking time (t BLANK ) has elapsed. If the switch is
turned off at the end of t BLANK , a retry timer (t RETRY )
starts immediately after the blanking time has elapsed.
During that time, the switch stays off. At the end of
t RETRY , the switch turns on again. If the fault still exists,
the cycle repeats. If the fault has been removed, the
switch stays on. During this cycle, SC stays low. During
retry when the switch is off, the current through the
6
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相关代理商/技术参数 |
参数描述 |
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| MAX16914AUB/V+ | 功能描述:监控电路 Over Volt protector Ideal Diode RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX16914AUB/V+T | 功能描述:监控电路 Over Volt protector Ideal Diode RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX16914AUB+ | 功能描述:监控电路 Fuel-Gauge Interface RoHS:否 制造商:Maxim Integrated 监测电压数: 监测电压: 欠电压阈值:4.35 V 过电压阈值: 输出类型:Active Low, Open Drain 人工复位: 监视器: 电池备用开关: 上电复位延迟（典型值）:3 us 电源电压-最大:19 V 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:uMAX-10 封装: |
| MAX16914AUB+T | 制造商:Maxim Integrated Products 功能描述:IDEAL DIODE, REVERSE-BATTERY, AND OVERVOLTAGE PROTECTION SWI - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC LED DVR HBRIGHT 4CH UMAX |
| MAX16915AUB/V+ | 功能描述:监控电路 Over Volt protector Ideal Diode RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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