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參數(shù)資料
| 型號： | ISL97645IRZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Boost + VON Slice + VCOM |
| 中文描述： | 0.4 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, PLASTIC, QFN-24 |
| 文件頁數(shù)： | 8/14頁 |
| 文件大?。?/td> | 535K |
| 代理商： | ISL97645IRZ |
8
FN9263.0
April 11, 2006
Typical Application Diagram
Applications Information
The ISL97645 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
integrated V
COM
buffer which can provide up to 400mA peak
current. This part also integrates Gate Pulse Modulator
circuit that can help to optimize the picture quality.
Enable Control
When enable pin is pulling down, the ISL97645 is shut down
reducing the supply current to <10μA. When the voltage at
enable pin reaches 2.2V, the ISL97645 is on.
Boost Converter
Frequency Selection
The ISL97645 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 ISL97645
ramps up current limit from 0A up to full value, as the voltage
at SS pin ramps from 0 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.
Operation
The boost converter is a current mode PWM converter
operating at either a 650kHz or 1.2MHz. It can operate in
both discontinuous conduction mode (DCM) at light load and
FIGURE 12. TYPICAL APPLICATION DIAGRAM
BOOST
GPM
CIRCUIT
VON
A
VDD
ENABLE
VGH
VDD_1
VGH_M
LX
FB
VFLK
COMP
SS
POS
TO ROW DRIVER
NC
NC
VIN
GND
VDPM
FREQ-
CE
RE
PGND
VDD2
AGND
V
IN
C1
22μF
C3
2.2nF
C4
10nF
S1
S2
S3
C5
470P
R3
2K
C11
1μF
C6
0.1μF
0.47μF
R2
1.3K
R1
10K
C2
47μF
L1
10μH
D1
NEG-
OUT
V
COM
+4.0V
A
VDD
R7
80k
R6
130k
ISL97645
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL97645IRZ-T | Boost + VON Slice + VCOM |
| ISL97645IRZ-TK | Boost + VON Slice + VCOM |
| ISL97646 | Boost + LDO + VON Slice + VCOM |
| ISL97646IRZ-T | Boost + LDO + VON Slice + VCOM |
| ISL97646IRZ-TK | Boost + LDO + VON Slice + VCOM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL97645IRZ-T | 功能描述:IC REG BOOST VON VCOM 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR |
| ISL97645IRZ-TK | 功能描述:IC REG BOOST VON VCOM 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR |
| ISL97646IRZ-EVALZ | 功能描述:BOARD EVALUATION FOR ISL97646 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓撲結(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL97646IRZ-T | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 ISL97646IRZOOST +L DO +VON SLICE +VCOM RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| ISL97646IRZ-TK | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 ISL97646IRZOOST +L DO +VON SLICE +VCOM RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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