- 您现在的位置：买卖IC网 > PDF目录1844 > MAX6459UTC+T (Maxim Integrated Products)IC SUPPLY VOLT MONITR SOT23-6 PDF资料下载
参数资料
| 型号： | MAX6459UTC+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/15页 |
| 文件大小： | 0K |
| 描述： | IC SUPPLY VOLT MONITR SOT23-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 标准为 50 µs |
| 电压 - 阀值： | 可调节/可选择 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-6 |
| 包装： | 带卷 (TR) |
MAX6457–MAX6460
High-Voltage, Low-Current Voltage Monitors in
SOT Packages
V SUPPLY
V SUPPLY
FUSE
R1
V CC
V CC
LOAD
IN+
100k ?
R2
MAX6457–
MAX6460
R PULLUP
LOAD
R1
MAX6457–
MAX6460
R3
SCR
1 μ F
CLEAR
OUT
(OUTA FOR
MAX6459)
GND
R2
IN+
OUT
(OUTA FOR
MAX6459)
GND
Figure 9. Overvoltage Shutdown Circuit (with External Pass
MOSFET)
Applications Information
Undervoltage Lockout
Figure 8 shows the typical application circuit for detecting
an undervoltage event of a 5-cell Li+ battery stack.
Connect OUT of the MAX6457/MAX6458/MAX6460
(OUTA of the MAX6459) to the shutdown input of the DC-
DC converter to cut off power to the load in case of an
undervoltage event. Select R1 and R2 to set the trip volt-
age (see the Programming the Trip Voltage (V TRIP ) sec-
tion). When the voltage of the battery stack decreases so
that V IN + drops below V TH - of the MAX6457–MAX6460,
then OUT (OUTA) goes low and disables the power sup-
ply to the load. When the battery charger restores the volt-
age of the 5-cell stack so that V IN + > V TH +, OUT (OUTA)
goes high and the power supply resumes driving the load.
Figure 10. Overvoltage Shutdown Circuit (with SCR Fuse)
Window Detection
The MAX6458/MAX6459 include undervoltage and
overvoltage comparators for window detection (Figures
2 and 3). The circuit in Figure 11 shows the typical con-
figuration for this application. For the MAX6458, OUT
asserts high when V CC is within the selected “window.”
When V CC falls below the lower limit of the window
(V TRIPLOW ) or exceeds the upper limit (V TRIPHIGH ),
OUT asserts low.
The MAX6459 features two independent open-drain
outputs: OUTA (for undervoltage events) and OUTB (for
overvoltage events). When V CC is within the selected
window, OUTA and OUTB assert high. When V CC falls
below V TRIPLOW , OUTA asserts low while OUTB
V CC
Overvoltage Shutdown
The MAX6457–MAX6460 are ideal for overvoltage shut-
down applications. Figure 9 shows a typical circuit for
this application using a pass P-channel MOSFET. The
MAX6457–MAX6460 are powered directly from the sys-
V CC
OUT
MAX6458
V CC
R PULLUP
OUT
tem voltage supply. Select R1 and R2 to set the trip volt-
age (see the Programming the Trip Voltage (V TRIP )
section). When the supply voltage remains below the
R1
IN+
ONLY
V CC
selected threshold, a low logic level on OUT (OUTB for
MAX6459) turns on the p-channel MOSFET. In the case
of an overvoltage event, OUT (OUTB) asserts high, turns
off the MOSFET, and shuts down the power to the load.
R2
R3
IN-
MAX6458
MAX6459
OUTA
R PULLUP
R PULLUP
OUTA
Figure 10 shows a similar application using a fuse and
a silicon-controlled rectifier (SCR). An overvoltage
event turns on the SCR and shorts the supply to
ground. The surge of current through the short circuit
blows the fuse and terminates the current to the load.
Select R3 so that the gate of the SCR is properly biased
GND
OUTB
MAX6459
ONLY
OUTB
when OUT (OUTB) goes high impedance.
10
Figure 11. Window Detection
Maxim Integrated
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6463XR18+T | IC VOLT DETECTOR LP SC70-3 |
| MAX6467US16D3+T | IC MPU/RESET CIRC 1.575V SOT143 |
| MAX6473TA28BD3+T | IC REG LDO 2.8V/ADJ .3A 8TDFN-EP |
| MAX651ESA+ | IC REG CTRLR BUCK PWM 8-SOIC |
| MAX660CSA-T | IC REG SWITCHD CAP DBL INV 8SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6460UT | 制造商:Maxim Integrated Products 功能描述:HIGH-VOLTAGE, LOW-CURRENT VOLTAGE MONITORS IN - Rail/Tube |
| MAX6460UT+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR MONITOR 6PIN SOT-23 - Rail/Tube |
| MAX6460UT+T | 功能描述:监控电路 Single Low C/V Voltage Monitor 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 |
| MAX6460UT-T | 功能描述:监控电路 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 |
| MAX6461UK16 | 制造商:Maxim Integrated Products 功能描述:ULTRA-LOW-POWER VOLTAGE DETECTORS A - Cut Tape Product |
发布紧急采购，3分钟左右您将得到回复。