参数资料
| 型号： | EL7585ILZ-T7 |
| 厂商： | Intersil |
| 文件页数： | 15/19页 |
| 文件大小： | 0K |
| 描述： | IC POWER SUPPLY TFT-LCD 20-QFN |
| 标准包装： | 1,000 |
| 应用： | 转换器，TFT，LCD |
| 输入电压： | 3 V ~ 5 V |
| 输出数： | 4 |
| 输出电压： | 5.5 V ~ 20 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN 裸露焊盘（4x4） |
| 包装： | 带卷 (TR) |
EL7585
Typical fault thresholds for FBP, FBL, FBN and FBB are
included in the tables. PG and DELB fault thresholds are
typically 0.6V.
C INT has an internal current-limited clamp to keep the
voltage within its normal range. If C INT is shorted low, the
boost regulator will attempt to regulate to 0V. If C INT is
shorted H, the regulator switches to P mode.
If any of the regulated outputs (V BOOST , V ON , V OFF or
V LOGIC ) are driven above their target levels the drive
circuitry will switch off until the output returns to its expected
value.
If V BOOST is excessively loaded, the current limit will
prevent damage to the chip. While in current limit, the part
acts like a current source and the regulated output will drop.
If the output drops below the fault threshold, a ramp will be
initiated on C DELAY and, provided that the fault is sustained,
the chip will be disabled on completion of the ramp.
In some circumstances, (depending on ambient temperature
and thermal design of the board), continuous operation at
current limit may result in the over-temperature threshold
being exceeded, which will cause the part to disable
immediately.
All I/O also have ESD protection, which in many cases will
also provide overvoltage protection, relative to either ground
or V DD . However, these will not generally operate unless
abs max ratings are exceeded.
15
Component Selection for Start-Up Sequencing and
Fault Protection
The C REF capacitor is typically set at 220nF and is required
to stabilize the V REF output. The range of C REF is from
22nF to 1μF and should not be more than five times the
capacitor on C DEL to ensure correct start-up operation.
The C DEL capacitor is typically 220nF and has a usable
range from 47nF minimum to several microfarads - only
limited by the leakage in the capacitor reaching μA levels.
C DEL should be at least 1/5 of the value of C REF (See
above). Note with 220nF on C DEL the fault time-out will be
typically 50ms and the use of a larger/smaller value will vary
this time proportionally (e.g. 1μF will give a fault time-out
period of typically 230ms).
Fault Sequencing
The EL7585 has an advanced fault detection system which
protects the IC from both adjacent pin shorts during
operation and shorts on the output supplies.
A high quality layout/design of the PCB, in respect of
grounding quality and decoupling is necessary to avoid
falsely triggering the fault detection scheme - especially
during start-up. The user is directed to the layout guidelines
and component selection sections to avoid problems during
initial evaluation and prototype PCB generation.
FN7345.2
March 9, 2006
相关PDF资料 |
PDF描述 |
|---|---|
| EL7586ILZ | IC POWER SUPPLY TFT-LCD 20-QFN |
| EL7640AILTZ | IC CONV DC/DC TFT-LCD 32-QFN |
| EL7642ILTZ | IC BOOST REG DC/DC TFT-LCD 32QFN |
| EL814 | PHOTOCOUPLER TRANS OUT 4DIP |
| EL815-V | OPTOCOUPLER DARL DCIN 4DIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EL7586 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:TFT-LCD Power Supply |
| EL7586_06 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:TFT-LCD Power Supply |
| EL7586A | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:TFT-LCD Power Supply |
| EL7586AILZ | 功能描述:直流/直流开关调节器 EL7586AILZ TFT-LCD PWR SUPY RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| EL7586AILZ-T13 | 功能描述:直流/直流开关调节器 EL7586AILZ TFT-LCD P PWR SUPY RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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