- 您现在的位置：买卖IC网 > PDF目录1228 > MAX34561EVKIT# (Maxim Integrated Products)EVAL KIT DUAL E-FUSE 24-TQFN PDF资料下载
参数资料
| 型号： | MAX34561EVKIT# |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/11页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT DUAL E-FUSE 24-TQFN |
| 标准包装： | 1 |
| 系列： | * |
12V/5V Hot-Plug Switch
Pin Description (continued)
PIN
22
23
24
—
NAME
ARD5
VRAMP5
TIMER5
EP
FUNCTION
5V Autoretry Disable. Connect this pin to GND to disable automatic retry functionality; the device
latches off during an overtemperature fault. Leave this pin open to enable automatic retry function.
This pin contains a pullup (R PU5 ) to V CC5 . This pin is only sampled on device power-on. If the 5V
side is not used, connect this pin to GND.
5V Voltage Ramp Control. A capacitor connected to this pin determines the voltage ramp of the
LOAD5 output during turn-on according to the equation: dV LOAD5 = 2.3332 x (I VRAMP /C VRAMP5 ).
5V Enable Delay Control. A capacitor connected to this pin determines the enable delay according
to the equation: Enable Delay = C TIMER5 x (V REF5 /I TIMER ).
Exposed Pad. Connect to ground. The EP must be soldered to ground for proper thermal and elec-
trical operation.
Detailed Description
The MAX34561 has hot-plug controls for both +12V and
+5V power rails. The circuitry for the +12V and +5V con-
trols are independent of each other and can be treated
as two separate hot-plug switches, even though the GND
pin is common between the two switches. The sections
that follow are written from the +12V circuit perspective,
but also apply for the +5V switch control.
The device begins to operate when the supply voltage
V CC12 (or V CC5 ) exceeds its undervoltage lockout level,
V UR12 (or V UR5 ). At this level, the corresponding enable
circuit and TIMER12 (TIMER5) become active. Once the
device has been enabled, a gate voltage is applied to
the corresponding power MOSFET, allowing current to
begin flowing from V CC12 (V CC5 ) to LOAD12 (LOAD5).
The speed of the output-voltage ramp is controlled by
the capacitance placed at the VRAMP12 (VRAMP5) pin.
The load current is continuously monitored during the
initial conduction (I SCL12 or I SCL5 ) and after the cor-
responding MOSFET is fully on (I OVL12 or I OVL5 ). If the
current exceeds the current limit that is set by the exter-
nal resistance at ILIM12 (ILIM5), the gate voltage of the
corresponding power MOSFET is decreased, reducing
the output current to the set current limit.
When the output power is initially ramping up, the current
limit is I SCL12 (I SCL5 ). Once the corresponding MOSFET
is fully on, the current limit is I OVL12 (I OVL5 ). The I SCL12
(I SCL5 ) current limit protects the source if there is a dead
short on initial power-up.
The device acts as a fuse and automatically disables the
current flowing to the load when the temperature of the
power corresponding MOSFET has exceeded the shut-
down junction temperature, T SHDN .
Enable/Timer
The voltage level of TIMER12 (TIMER5) is compared to
an internal source (see the Functional Diagram ). When
the level on the pin exceeds V ON , the comparator out-
puts a low level. This then turns on the voltage ramp
circuit, enabling the device’s output. TIMER12 (TIMER5)
can be configured into one of four different modes of
operation as listed in Table 1. TIMER12 (TIMER5) pin
was designed to work with most logic families. TIMER12
(TIMER5) has at least 250mV of hysteresis between V ON
and V OFF . It is recommended that any logic gate used
to drive TIMER12 (TIMER5) be tested to ensure proper
operation.
Table_1._TIMER__Pin_Modes
Current is limited by the device comparing the volt-
age difference between LOAD12 (LOAD5) and ILIM12
(ILIM5) to an internal reference voltage. If the output cur-
rent exceeds the limit that is set by the R ILIM12 (R ILIM5 )
resistor, the gate voltage of the corresponding power
MOSFET is decreased, which reduces the output current
to the load.
OPERATION_MODE
Automatic Enable
Delayed Automatic Enable
Enable/Disable
Enable with Delay/Disable
TIMER_PIN_SETUP
No connection to TIMER12
(TIMER5)
Capacitor C TIMER_ connected
to TIMER12 (TIMER5)
Open-collector device
Open-collector device and
C TIMER _
7
相关PDF资料 |
PDF描述 |
|---|---|
| MAX34565EVKIT# | KIT EVAL FOR MAX34565 |
| MAX367CWN | IC SIGNAL-LINE CIRC PROT 18-SOIC |
| MAX4080EVKIT+ | KIT EVAL FOR MAX4080 |
| MAX4208EVKIT+ | KIT EVAL FOR MAX4208 |
| MAX4209EVKIT+ | KIT EVAL FOR MAX4209 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX34561EVKIT# | 功能描述:电源管理IC开发工具 12V&5V DUAL E-FUSE RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX34561T+ | 功能描述:热插拔功率分布 12V/5V Hot-Plug Switch RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX34561T+T | 功能描述:热插拔功率分布 12V/5V Hot-Plug Switch RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX34564AETB+ | 功能描述:热插拔功率分布 12V Hot Plug Switch Auto-Retry RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MAX34564AETB+T | 功能描述:热插拔功率分布 12V Hot Plug Switch Auto-Retry RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。