AME9003AEPH datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > Analog mixed-signal IC> Drivers and interfaces> AME9003AEPH

AME9003AEPH: DescriptionInterface Circuit; CategoryAnalog mixed-signal IC Drivers and interfaces; File Size753KB，37 Pages; ManufacturerAnalogMicroElectronics,Inc.(AME); AMT was founded in Taiwan in November 2000 and merged into AMT Microelectronics, Inc., a US company located in Silicon Valley, California, USA. Its stock was officially listed for public trading in March 2004.

Download Datasheet Parametric View All

AME9003AEPH Overview

Interface Circuit

AME9003AEPH Parametric

Parameter Name	Attribute value
Maker	AnalogMicroElectronics,Inc.(AME)
package instruction	,
Reach Compliance Code	compliant

AME9003AEPH Preview

Download Datasheet

View All

AME, Inc.

AME9003

lim

Pre

CCFL Backlight Controller

General Description

The AME9003 is AME’s next generation direct drive

CCFL controller. Like its cousins, the AME9001 and

AME9002, the AME9003 controller provides a cost effi-

cient means to drive single or multiple cold cathode fluo-

rescent lamps (CCFL), driving 3 external MOSFETs that,

in turn, drive a wirewound transformer that is coupled to

the CCFL.

The AME9003, like the AME9002 includes extra cir-

cuitry that allows for a special one second start up pe-

riod wherein the voltage across the CCFL is held at a

higher than normal voltage to allow older tubes (or cold

tubes) a period in which they can “warm up”. During

this one second startup period the driving frequency is

adjusted off of resonance so that the tube voltage can be

controlled. As soon as the CCFL “strikes” the special

start up period ends and the circuit operates in its normal

mode. However the AME9003 uses an extra capacitor to

accurately set the start up interval. In addition to that the

AME9003 features a soft start AND soft finish on each

dimming cycle edge in order to minimize any audible

vibrations during the dimming function.

The AME9003 also includes features such as, dimming

control polarity selection, undervoltage lockout and fault

detection. It is designed to work with input voltages from

7V up to 24V. When disabled the circuit goes into a zero

current mode.

Pin Configuration

AME9003

1. VREF

2. CE

3. SSC

4. RDELTA

5. SSC1ST

6. RT2

7. VSS

8. OVPH

9. OVPL

10.FCOMP

11.CSDET

12.BATTFB

13.

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.

24.

OUTC

OUTAPB

OUTA

VBATT

BRPOL

VDD

CT1

COMP

BRIGHT

SSV

PNP

System Block Diagram

Controller

External

Components

CCFL Array

Features

Small package: 24 pins for QSOP/ SOIC/

PDIP packages

Drives multiple tubes

Special 1 second start up mode

Automatically checks for common fault

conditions

7.0V < Vbatt < 24V

Low component count

Low Idd < 3.5mA

<1uA shutdown mode

Battery UV lockout

Brightness polarity select

Soft-start, soft-finish dimming

AME

9003

LIGHT

Resistors

Capacitors

Applications

Notebook computers

LCD/TFT displays

AME, Inc.

AME9003

lim

Pre

CCFL Backlight Controller

Pin Description

Pin #

Pin Name

VREF

Pin Description

Reference. Compensation point for the 3.4V internal voltage reference. Must have

bypass capacitor connected here to VSS.

Chip enable. When low (<0.4V) the chip is put into a low current (~0uA) shutdown

mode.

Blanking interval ramp. During the first cycle this pin sources 1.5uA. The first cycle is

used to define the initial start up period, often on the order of one second. During

subsequent cycles SSC sources 140

A. This is primarily used to provide a "blanking

interval" at the beginning of every dimming cycle to temporarily disable the fault

protection circuitry. The blanking interval is active when V(SSC) < 3.0 volts. (See

application notes.)

A resistor connected from this pin to VDD determines the amount that the voltage at

FCOMP modulates the switching frequency. The frequency is inversely proportional to

the voltage at FCOMP.

A capacitor added between this pin and SSC is used to define the one second initial

start up period. SSC1ST is connected to VSS for the start up period and floats for

subsequent periods.

A resistor from this pin to VSS sets the minimum frequency of the VCO. The voltage at

this pin is 1.5V

Negative supply. Connect to system ground.

Over voltage protection input (HIGH). Indirectly senses the voltage at the secondary of

the transformer through a resistor (or capacitor) divider. During the initial start up

period, if OVPH is > 3.3V, FCOMP is driven towards VSS (increasing the frequency)

and SSV is reset to zero (which decreases the duty cycle). After the initial start up

period is completed the circuit will shut down if OVPH is > 3.3V.

Over voltage protection input (LOW). During the initial start up period if OVPL < 2.5

volts then FCOMP is allowed to ramp up (decreasing the oscillator frequency allowing

the circuit to get closer to resonance). If, during the initial start up period, OVPL > 2.5

volts then FCOMP is held at its original value (not allowed to increase so the

oscillator frequency stays constant). This action is designed to hold the voltage

across the CCFL constant while the CCFL "warms up".

Frequency control point. Initially this pin is at VSS which yields a maximum switching

frequency. Depending on the voltage at OVPL and OVPH the pin FCOMP will normally

ramp upwards lowering the switching frequency towards the circuit’s resonant

frequency.

SSC

RDELTA

SSC1ST

RT2

VSS

OVPH

OVPL

FCOMP

Recommended Resources

STM32F1 and minimum system circuit diagram

Parallel switching power supply for televisions (a)

Stereo level display circuit

Voice controlled lantern circuit.gif

Lightning protection circuit

LR3714M (video recorder) infrared remote control transmitter circuit

Single TL431 constant current circuit: [size=4]As shown in the figure, it is a schematic diagram of using a single TL431 constant current. [/size] [size=4] [/size] [align=center][size=4][/size][/align][size=4] [/size] [size=4]Principle: Th...; Jacktang Analogue and Mixed Signal

Can the value of this register be set arbitrarily? For example, 0XF represents 25.6V, so what value does 20V correspond to?: Can the value of this register be set arbitrarily? For example, 0XF represents 25.6V, so what value does 20V correspond to? The value of the register? 0X??...; QWE4562009 Test/Measurement

Does fast charging damage the battery? He has done a comparative test for everyone. Let’s see the results~~: It is said online that fast charging is harmful to the battery, and charging with too low or too high a charge is bad for the battery. Do you think this makes sense? How can we better protect the batt...; 木犯001号 Power technology

Share the schematic simulation video of senior hardware engineers ---- Introduction to spice model -----------The key is free: Those who are learning schematic simulation can watch the video. The introduction of spice model is very detailed in the video, which is good. [hide]attach://487665.rar attach://487666.rar[/hide]...; CCBSKY Analog electronics

DSP interrupt path flow chart: Any peripheral or external interrupt that contains the PIE interrupt source, and its own peripheral interrupt module can also be enabled.PIE recognizes INTx.y, and the bit of PIE interrupt is Latched,...; 灞波儿奔 DSP and ARM Processors

Detailed explanation of terminal device state switching in TI ZigBee protocol stack: This article mainly introduces the detailed description of the switching between different states during the operation of the terminal device End Device in TI ZigBee protocol stack Z-Stack, and furthe...; Jacktang Wireless Connectivity

Fingerprint Recognition System Based on AT77C101B

1 Fingerprint Recognition Principle 　　Capacitive sensor is a type of fingerprint recognition sensor. It captures fingerprint images through electronic measurement design. The surface is an insulati...[Details]
Light-controlled electric toy circuit diagram

When you point the flashlight at the photocell, the battery-powered CMOS logic circuit switches, turning the small motor of a model train or other electric toy on or off. For most small motors, the t...[Details]
LTC2943 battery fuel measurement chip for multi-cell batteries

MILPITAS, CA – October 29, 2013 – Linear Technology Corporation introduces the LTC2943, a multi-cell battery fuel gauge that directly measures 3.6V to 20V battery stacks. Interfacing with multiple ce...[Details]
ADI oil well logging high temperature technology and solutions

Logging technology, also known as geophysical logging technology, is the "eyes" of geologists and oil and gas reservoir development engineers in oil and gas reservoir exploration and development. The...[Details]
100-base counter

100-base counter Asynchronous cascade method to form a 100-base counter Define the high and low bits of the integrated counter, 1# chip is the low bit (equivalent to the ones bit); 2# chip is ...[Details]
Calculation of Negative Feedback Amplifier Circuit

1: Approximate estimation of deep negative feedback amplifier circuit Only when the amplifier circuit meets the condition of deep negative feedback can we use appro...[Details]
Discussion on the design of flexible battery charging system

Portable electronic devices (whether personal electronics, remote scientific instruments, or a simple garage flashlight) all have one thing in common: batteries. This could be NiCad, NiMH, Lithium,...[Details]
Knowledge popularization post, the master teaches you the function of graphics card components

We often see in tests that a certain graphics card uses several phases of luxurious power supply, each phase uses a certain number of capacitors of certain voltage, a certain number of pins of MOS ...[Details]
Open-air sound system design and tuning

Selection and system design of outdoor audio system The design of audio system involves a wide range of factors. According to the characteristics of outdoor audio, which is used in different places an...[Details]
Series Inductance--How Connectors Generate Electromagnetic Interference

Electromagnetic interference is caused by signal current in a large loop. Figure 9.6 illustrates a common electromagnetic interference problem. A 64-bit bus is connected from card A...[Details]
Simple pager circuit diagram

The circuit of the pager is simple and easy to manufacture, and can be used for calling between rooms in a family or within a unit. The circuit is shown in the figure. When in use, if either party ...[Details]
Low Power High Slew Rate CMOS Analog Buffer

Introduction : Analog voltage buffers are very important basic building blocks in mixed signal design. They are mainly used for signal monitoring and driving loads. In the first case, the buf...[Details]
What is the pre-amplifier and the post-amplifier

The working principle of the power amplifier is to amplify the various sound signals played by the sound source to drive the speaker to make sound. From a technical point of view, the power amplifi...[Details]
High signal-to-noise ratio MEMS microphone drives artificial intelligence interaction

By: Dr. Gunar Lorenz Senior Director, Technical Marketing, Infineon Technologies Proofreader: Ding Yue Chief Engineer of Consumer, Computing and Communications Business in Greater China, Infin...[Details]
A novel low-power two-stage operational amplifier design

1. Introduction As the integration and complexity of IC design increase, how to carry out low-power design has become a problem that must be solved. At present, there are three main methods to real...[Details]

Popular Components