参数资料
| 型号： | ISL97646IRZ-T |
| 厂商： | Intersil |
| 文件页数： | 9/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST LDO VON VCOM 24-QFN |
| 标准包装： | 6,000 |
| 应用： | 转换器，LCD 显示器 |
| 输入电压： | 2.7 V ~ 5.5 V |
| 输出数： | 2 |
| 输出电压： | 8 V ~ 20 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) |
ISL97646
Typical Application Diagram
L1
V IN
10μH
D1
A VDD
C1
22μF
C3
2.2nF
VIN2
COMP
R5
BOOST
LX
FB
C2
47μF
R1
10k
C9 (OPTIONAL)
C4
10nF
10k
SS
PGND
R2
1.3k
ENABLE
FREQ-
VDPM
VFLK
GPM
VGH
VDD_1
V ON
C5
470P CE
RE
CIRCUIT
VGH_M
VDD2
TO ROW DRIVER
A VDD
V COM
+4.0V
R6
130k
R7
80k
R3
2k POS
C11
1μF
NEG-
OUT
VIN1
C10
2.2μF
V LOGIC
C6
0.1μF
AGND
GND
LDO
CONTROLLER
LDO_OUT
ADJ
C7
4.7μF
FIGURE 14. TYPICAL APPLICATION DIAGRAM
Applications Information
The ISL97646 provides a complete power solution for TFT
LCD applications. The system consists of one boost
converter to generate A VDD voltage for column drivers, one
logic LDO regulator to provide voltage to logic circuit in the
LCD panel, one integrated V COM buffer which can provide
up to 400mA peak current. This part also integrates a Gate
Pulse Modulator circuit that can help to optimize the picture
quality.
Enable Control
When enable pin is pulling down, the ISL97646 is shut down
reducing the supply current to <10μA. When the voltage at
enable pin reaches 2.2V, the ISL97646 is on.
9
Boost Converter
Frequency Selection
The ISL97646 switching frequency can be user selected to
operate at either constant 650kHz or 1.2MHz. Lower
switching frequency can save power dissipation, while
higher switching frequency can allow smaller external
components like inductor and output capacitors, etc.
Connecting FREQ pin to ground sets the PWM switching
frequency to 650MHz, or connecting FREQ pin to V IN for
1.2MHz.
Soft-Start
The soft-start is provided by an internal 2.5μA current source
to charge the external soft start capacitor. The ISL97646
ramps up current limit from 0A up to full value, as the voltage
at SS pin ramps from 0V to 1.2V. Hence the soft-start time is
4.8ms when the soft-start capacitor is 10nF, 22.6ms for 47nF
and 48ms for 100nF.
FN6265.1
December 14, 2007
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| ISL97648IRTZ-TK | 制造商:Intersil Corporation 功能描述:HIGH VOLTAGE TFT-LCD LOGIC DRIVER (56 LD TQFN 8X8) - Tape and Reel |
| ISL97649AIRZ | 功能描述:PMIC 解决方案 LCD SUPPLY DCP VCOM AMP BPMSET +LDO 28L RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
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