参数资料
| 型号： | ISL97522IRZ-TK |
| 厂商： | Intersil |
| 文件页数： | 10/20页 |
| 文件大小： | 0K |
| 描述： | IC SUPPLY CTRL 4CH TFT-LCD 38QFN |
| 标准包装： | 1,000 |
| 应用： | LCD 电视机/监控器 |
| 电流 - 电源： | 3mA |
| 电源电压： | 4.5 V ~ 13.2 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 38-VFQFN 裸露焊盘 |
| 供应商设备封装： | 38-QFN（5x7） |
| 包装： | 带卷 (TR) |
ISL97522
Applications Information
The ISL97522 provides a multiple output power supply
solution for TFT-LCD applications. The system consists of a
high efficiency boost controller, two low cost linear-regulator
controllers (V ON and V OFF ) and a buck reglator (V LOGIC ).
Table 1 below lists the recommended components.
TABLE 1. RECOMMENDED COMPONENTS
A VDD Converter
The main boost converter is a current mode PWM controller
operating at a fixed frequency. The 1MHz switching
frequency enables the use of low profile inductor and
multilayer ceramic capacitors, which results in a compact,
low-cost power system for LCD panel design.
The A VDD converter can operate in continuous or
discontinuous inductor current mode. The ISL97522 is
DESIGNATION
C1, C2, C3
C20
DESCRIPTION
10μF, 16V, X7R ceramic capacitor (1206)
TDK C3216X7R1C106M
4.7μF, 16V X5R ceramic capacitor (1206)
TDK C3216X5R1A475K
designed for continuous current mode, but it can also
operate in discontinuous current mode at light load. In
continuous current mode, current flows continuously in the
inductor during the entire switching cycle in steady state
operation. The voltage conversion ratio in continuous current
A VDD 1
V IN
C15
D1
1μF, 25V X7R ceramic capacitor (1206)
TDK C3216X7R1E105K
1A 20V low leakage schottky rectifier (CASE
457-04) ON SEMI MBRM120ET3
mode is given by (in boost mode):
---------------- = -------------
1 – D
where D is the duty cycle of switching MOSFET.
(EQ. 1)
D11, D12, D21
L1
Q1,Q2
Q3
Q11
Q21
200mA 30V schottky barrier diode (SOT-23)
Fairchild BAT54S
6.8mH 4.6A inductor
Coilcraft DO3316P-682ML
6.3A 30V single N-Channel logic level
PowerTrench MOSFET (SOT-23)
Fairchild FDC655AN
-2A -30V single P-Channel logic level
PowerTrench MOSFET (SuperSOT-3)
Fairchild FDN360P
200mA 40V PNP amplifier (SOT-23)
Fairchild MMBT3906
200mA 40V NPN amplifier (SOT-23)
Fairchild MMBT3904
Figure 15 shows the function diagram of the boost controller.
It uses a summing amplifier architecture consisting of GM
stages for voltage feedback, current feedback and slope
compensation. A comparator looks at the peak inductor
current cycle by cycle and terminates the PWM cycle if the
current limit is reached.
An external resistor divider is required to divide the output
voltage down to the nominal reference voltage. Current
drawn by the resistor network should be limited to maintain
the overall converter efficiency. The maximum value of the
resistor network is limited by the feedback input bias current
and the potential for noise being coupled into the feedback
pin. A resistor network in the order of 200k Ω is
recommended. The boost converter output voltage is
determined by the following equation:
A VDD = --------------------- × V FBB
10
R 1 + R 2
R 1
(EQ. 2)
FN7445.0
December 13, 2006
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| ISL97536IUZ | 功能描述:IC REG BUCK SYNC ADJ 1A 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:1 输出电压:5V，1 V ~ 10 V 输入电压:3.5 V ~ 28 V PWM 型:电流模式 频率 - 开关:220kHz ~ 1MHz 电流 - 输出:600mA 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SSOP（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:16-QSOP |
| ISL97536IUZ-T | 功能描述:IC REG BUCK SYNC ADJ 1A 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:50 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:5 V ~ 25 V 输入电压:2.3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:600kHz，1.2MHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 包装:管件 供应商设备封装:8-MSOP |
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