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参数资料
| 型号： | ISL97645IRZ-TK |
| 厂商： | Intersil |
| 文件页数： | 14/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST VON VCOM 24-QFN |
| 标准包装： | 1,000 |
| 应用： | LCD 监视器，笔记本电脑显示器 |
| 电流 - 电源： | 1mA |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-VFQFN 裸露焊盘 |
| 供应商设备封装： | 24-QFN 裸露焊盘（4x4） |
| 包装： | 带卷 (TR) |
ISL97645A
TABLE 6. VGH_M STATUS TABLE
V IN
x
VDPM
x
RESET
x
VGH
<2.5V
VGH_M
GROUND
COMMENT
Will be grounded if VIN is above
a logic threshold. Could occur at
power-up or power-down
>VLOR
x
>VLOR
<1.215V
<1.215V
>1.215V
x
High
High
>2.5V
>2.5V
>2.5V
GROUND
GROUND
Switching
Start-up only condition: If either
V IN > VLOR or reset is H, but
VDPM < 1.215V, GND VGHM
controlled by
VFLK
x
x
Low
>2.5V
VGH
Power-down state. Could occur
at power-up if part starts with
VGH > 2.5V
Start-Up Sequence
When V IN exceeds VLOR and ENABLE reaches the VIH
threshold value, Boost converter starts up, and gate pulse
modulator circuit output holds until VDPM is charged to
1.215V. Note that there is a DC path in the boost converter
from the input to the output through the inductor and diode,
hence the input voltage will be seen at output with a forward
voltage drop of diode before the part is enabled. If this
voltage is not desired, the following circuit can be inserted
between input and inductor to disconnect the DC path when
the part is disabled.
.
positive and negative at the line rate for the display. Thus the
amplifier must be capable of sourcing and sinking capacitive
pulses of current, which can occasionally be quite large (a
few 100mA for typical applications).
The ISL97645A V COM amplifier's output current is limited to
400mA. This limit level, which is roughly the same for
sourcing and sinking, is included to maintain reliable
operation of the part. It does not necessarily prevent a large
temperature rise if the current is maintained. (In this case the
whole chip may be shut down by the thermal trip to protect
functionality.) If the display occasionally demands current
pulses higher than this limit, the reservoir capacitor will
TO INDUCTOR
ENABLE
INPUT
provide the excess and the amplifier will top the reservoir
capacitor back up once the pulse has stopped. This will
happen on the μs time scale in practical systems and for
pulses 2 or 3 times the current limit, the V COM voltage will
have settled again before the next line is processed.
Fault Protection
ISL97645A provides the overall fault protections including
FIGURE 18. CIRCUIT TO DISCONNECT THE DC PATH OF
over current protection and over-temperature protection.
BOOST CONVERTER
An internal temperature sensor continuously monitors the
V COM Amplifier
The V COM amplifier is designed to control the voltage on the
back plate of an LCD display. This plate is capacitively
coupled to the pixel drive voltage which alternately cycles
14
die temperature. In the event that die temperature exceeds
the thermal trip point, the device will shut down and disable
itself. The upper and lower trip points are typically set to
+140°C and +100°C respectively.
FN6353.1
October 21, 2010
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相关代理商/技术参数 |
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| ISL97646IRZ-EVALZ | 功能描述:BOARD EVALUATION FOR ISL97646 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL97646IRZ-T | 功能描述:直流/直流开关调节器 ISL97646IRZOOST +L DO +VON SLICE +VCOM 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 |
| ISL97646IRZ-TK | 功能描述:直流/直流开关调节器 ISL97646IRZOOST +L DO +VON SLICE +VCOM 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 |
| ISL97648IRTZ | 功能描述:IC BOOST DC/DC REG RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:2,000 系列:- 应用:控制器，DSP 输入电压:4.5 V ~ 25 V 输出数:2 输出电压:最低可调至 1.2V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:30-TFSOP（0.173"，4.40mm 宽） 供应商设备封装:30-TSSOP 包装:带卷 (TR) |
| ISL97648IRTZ-T | 制造商:Intersil Corporation 功能描述:HIGH VOLTAGE TFT-LCD LOGIC DRIVER (56 LD TQFN 8X8) - Tape and Reel |
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