参数资料
| 型号： | MAX8536EUA+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/20页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR ORING MOSFET 8-MSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 应用： | 网络/电信电源，整流器 |
| FET 型： | N 沟道 |
| 输出数： | 1 |
| 内部开关： | 无 |
| 延迟时间 - 关闭： | 200ns |
| 电源电压： | 3 V ~ 5.5 V |
| 电流 - 电源： | 2mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 管件 |
ORing MOSFET Controllers with Fastest
Fault Isolation for Redundant Power Supplies
for the MAX8536 is 12μA. Increasing the charge-pump
frequency increases the GATE drive current. Adding a
resistor from GATE to the gate of the external MOSFETs
further increases turn-on and turn-off times.
CS
The voltage drop across the external MOSFETs is mea-
sured between the V CC and CS inputs. CS connects to
the positive side of the system bus. The voltage drop
across the CS and V CC determines operation modes.
I FORWARD is defined as V CC - CS > 0.01V. I REVERSE is
defined as CS - V CC > 0.03V in all except the
MAX8585. In the MAX8585, I REVERSE = 0V.
FAULT Conditions
The MAX8535/MAX8536/MAX8585 contain a versatile
FAULT output that signals overvoltage, undervoltage,
or reverse-current conditions. During a FAULT condi-
tion, the charge pump shuts down and the GATE dis-
charges to ground.
Undervoltage Fault
The MAX8535/MAX8536/MAX8585 turn off the external
MOSFET if the input voltage falls below the UVP thresh-
old. If UVP is left unconnected, the undervoltage input
is disabled. Set the undervoltage threshold to any value
effect. In this way, only the input supply, which is caus-
ing the overvoltage condition, is turned off in a redun-
dant power system application. An overvoltage fault is
a latching fault condition, and requires V CC or TIMER
to be cycled to reset the part.
Reverse-Current Fault
The MAX8535/MAX8536 contain a reverse-current pro-
tection feature. If, after the 500ms (typ) startup blank
time, an I REVERSE condition is detected, the MAX8535/
MAX8536 turn off the external MOSFET and a fault is
latched. A reverse-current fault forces the MAX8535/
MAX8536 to latch off. Cycle V CC or TIMER to exit a
latched fault condition. Startup blanking time allows the
incoming power supply to connect to the system bus at
V BUS - 0.4V. Reducing charge-pump frequency
increases the startup blanking time. The MAX8585
does not latch this fault.
Applications Information
Selecting the Timer Resistor
To set the frequency of the internal charge-pump oper-
ation, connect a resistor from TIMER to GND.
Determine the frequency by using the equation:
Frequency = 5 × ? 100 μ A -
above V CCOK . When the input voltage rises above the
UVP threshold, FAULT clears and the MOSFET turns
back on.
?
?
1 . 25 V ?
R TIMER ? ?
kHz / μ A
Overvoltage Fault
The MAX8535/MAX8536/MAX8585 contain an
adjustable OVP feature. A resistor-divider from the CS
system bus to the OVP input pin sets the overvoltage
threshold. When the OVP level is exceeded and the
part is in the I FORWARD condition (defined as V CC >
CS + 0.01V), the MAX8535/MAX8536/MAX8585 turn off
the external MOSFET and a fault is latched. If there is
no I FORWARD condition, an OVP detection has no
Pull TIMER above 1.5V for maximum charge-pump fre-
quency. Pull TIMER below 0.5V to disable the charge
pump. Leave TIMER unconnected for a 500kHz
charge-pump frequency.
Selecting the Gate Capacitor
and Gate Resistor
The charge pump uses an internal monolithic transfer
capacitor to charge the external MOSFET gates.
Table 1. MAX8535/MAX8536/MAX8585 Fault Modes
FAULT MODE
V CC UVLO
UVP pin undervoltage protection
OVP pin overvoltage protection
Reverse-current protection
(MAX8535/MAX8536)
Reverse-current protection
(MAX8585)
V CC internal (MAX8535/MAX8585)
overvoltage protection
PIN CONDITIONS
V CC < V CCOK
UVP < 1.25V
OVP > 1.25V
V CC > CS + 0.01V
V CC < CS - 0.03V
Gate ON for t > 0.5s
V CC < CS
Gate ON for t > 0.032s
V CC > 14.5V
GATE PIN
Low
Low
Low
Low
Low
Low
FAULT PIN
High impedance
Low
Low
Low
Low
Low
LATCHING
No
No
Yes
Yes
No
No
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相关代理商/技术参数 |
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| MAX8536EUA+ | 功能描述:功率驱动器IC ORing MOSFET Controller RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX8536EUA+T | 功能描述:功率驱动器IC ORing MOSFET Controller RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX8536EUA-T | 功能描述:功率驱动器IC RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX8536EVKIT | 功能描述:功率驱动器IC RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX8537EEI | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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