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| 型号： | EL7457CSZ-T7A |
| 厂商： | Intersil |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC DVR CMOS 40MHZ QUAD 16SOIC |
| 标准包装： | 250 |
| 配置： | 高端或低端 |
| 输入类型： | 非反相 |
| 延迟时间： | 14.5ns |
| 电流 - 峰： | 2A |
| 配置数： | 1 |
| 输出数： | 1 |
| 电源电压： | 4.5 V ~ 18 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SO |
| 包装： | 带卷 (TR) |
EL7457
Block Diagram
V S +
OE
V H
INPUT
GND
LEVEL
SHIFTER
3-STATE
CONTROL
OUTPUT
V S -
V L
Applications Information
Product Description
The EL7457 is a high performance 40MHz high speed quad
driver. Each channel of the EL7457 consists of a single
P-channel high side driver and a single N-channel low side
driver. These 3 Ω devices will pull the output (OUT X ) to either
the high or low voltage, on V H and V L respectively,
depending on the input logic signal (IN X ). It should be noted
that there is only one set of high and low voltage pins.
Power Dissipation Calculation
When switching at high speeds, or driving heavy loads, the
EL7457 drive capability is limited by the rise in die
temperature brought about by internal power dissipation. For
reliable operation die temperature must be kept below
T JMAX (125°C). It is necessary to calculate the power
dissipation for a given application prior to selecting package
type.
Power dissipation may be calculated:
∑ ( C INT × V S × f ) + ( C L × V OUT × f )
2
A common output enable (OE) pin is available on the
EL7457. This pin, when pulled low will put all outputs in to
the high impedance state.
PD = ( V S × I S ) +
4
1
2
(EQ. 1)
The EL7457 is available in 16-pin SO (0.150"), 16-pin
QSOP, and ultra-small 16-pin QFN packages. The relevant
package should be chosen depending on the calculated
power dissipation.
Supply Voltage Range and Input Compatibility
The EL7457 is designed for operation on supplies from 5V to
15V with 10% tolerance (i.e. 4.5V to 18V). The table on page
6 shows the specifications for the relationship between the
V S +, V S -, V H , V L , and GND pins. The EL7457 does not
contain a true analog switch and therefore V L should always
be less than V H .
All input pins are compatible with both 3V and 5V CMOS
signals With a positive supply (V S +) of 5V, the EL7457 is
where:
V S is the total power supply to the EL7457 (from V S + to
V S -)
V OUT is the swing on the output (V H - V L )
C L is the load capacitance
C INT is the internal load capacitance (80pF max)
I S is the quiescent supply current (3mA max)
f is frequency
Having obtained the application’s power dissipation, the
maximum junction temperature can be calculated:
also compatible with TTL inputs.
Power Supply Bypassing
T JMAX = T MAX + Θ JA × PD
(EQ. 2)
When using the EL7457, it is very important to use adequate
power supply bypassing. The high switching currents
developed by the EL7457 necessitate the use of a bypass
capacitor on both the positive and negative supplies. It is
recommended that a 4.7μF tantalum capacitor be used in
parallel with a 0.1μF low-inductance ceramic MLC capacitor.
These should be placed as close to the supply pins as
possible. It is also recommended that the V H and V L pins
have some level of bypassing, especially if the EL7457 is
driving highly capacitive loads.
9
where:
T JMAX is the maximum junction temperature (125°C)
T MAX is the maximum ambient operating temperature
PD is the power dissipation calculated above
θ JA is the thermal resistance, junction to ambient, of the
application (package + PCB combination). Refer to the
Package Power Dissipation curves on page 6.
FN7288.4
January 26, 2012
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相关代理商/技术参数 |
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| EL7457CU | 功能描述:IC DVR CMOS QUAD 40MHZ 16-QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - MOSFET，电桥驱动器 - 外部开关 系列:- 标准包装:50 系列:- 配置:低端 输入类型:非反相 延迟时间:40ns 电流 - 峰:9A 配置数:1 输出数:1 高端电压 - 最大（自引导启动）:- 电源电压:4.5 V ~ 35 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-263-6，D²Pak（5 引线+接片），TO-263BA 供应商设备封装:TO-263 包装:管件 |
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| EL7457CU-T7 | 功能描述:IC DRIVER QUAD 40MHZ HS 16-QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - MOSFET，电桥驱动器 - 外部开关 系列:- 标准包装:50 系列:- 配置:低端 输入类型:非反相 延迟时间:40ns 电流 - 峰:9A 配置数:1 输出数:1 高端电压 - 最大（自引导启动）:- 电源电压:4.5 V ~ 35 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-263-6，D²Pak（5 引线+接片），TO-263BA 供应商设备封装:TO-263 包装:管件 |
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