Datasheet > AAT3114ISN-20-T1

AAT3114ISN-20-T1

更新时间： 2024-02-24 03:48:41

品牌	Logo	应用领域
ANALOGICTECH		泵
页数	文件大小	规格书
14页	233K
描述
High Efficiency 1.5X Fractional Charge Pumps For White LED Applications

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AAT3114ISN-20-T1 技术参数

是否Rohs认证：	符合	生命周期：	Transferred
包装说明：	QCCN, LCC16,.16SQ,25	Reach Compliance Code：	unknown
风险等级：	5.73	JESD-30 代码：	S-PQCC-N16
湿度敏感等级：	1	端子数量：	16
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	QCCN
封装等效代码：	LCC16,.16SQ,25	封装形状：	SQUARE
封装形式：	CHIP CARRIER	电源：	3.5 V
认证状态：	Not Qualified	子类别：	Display Drivers
标称供电电压：	3.5 V	表面贴装：	YES
温度等级：	INDUSTRIAL	端子形式：	NO LEAD
端子节距：	0.635 mm	端子位置：	QUAD
Base Number Matches：	1

AAT3114ISN-20-T1 数据手册

浏览型号AAT3114ISN-20-T1的Datasheet PDF文件第10页

AAT3113/4

High Efficiency 1.5X Fractional Charge

Pumps For White LED Applications

Functional Block Diagram

VIN

Soft Start

C1+

C1-

C2+

C2-

1.5X

Charge

Pump

600kHz

Oscillator

Voltage

Reference

OUT

Current

S²Cwire

EN/SET

32x8 bit

ROM

Mode

DAC

Interface

D5*

D6*

GND

* AAT3114 only

decodes them into 32 individual current level set-

tings each 1dB apart (see Current Level Settings

below). Code 32 is full scale, and Code 1 is full

scale attenuated by 31dB. The modulo 32 interface

wraps states back to state 1 after the 32nd clock.

With each EN/SET pulse, the output current increas-

es by 1dB. To decrease the output current by 1dB,

31 EN/SET clock pulses are required. The counter

can be clocked at speeds up to 1Mhz, so intermedi-

ate states are not visible. The first rising edge of

EN/SET enables the IC and initially sets the output

LED current to -31dB, the lowest setting equal to

525µA. Once the final clock cycle is input for the

desired brightness level, the EN/SET pin is held high

to maintain the device output current at the pro-

grammed level. The device is disabled 500µs after

the EN/SET pin transitions to a logic low state.

Functional Description

The AAT3113/4 is a high efficiency 1.5X fractional

charge pump device intended for white LED back

light applications. The fractional charge pump con-

sists of a linear regulator followed by a 1.5X charge

pump. The AAT3113/4 requires only four external

components: two 1µF ceramic capacitors for the

charge pump flying capacitors (C1 and C2), one

1µF ceramic capacitor for C_IN, and one 0.33µF to

1µF ceramic capacitor for C_OUT. The charge pump

output is converted into four or six constant current

outputs (D1 to D4 or D6) to drive four or six individ-

ual LEDs with a maximum of 20mA each. The cur-

rent source output magnitude is controlled by the

EN/SET serial data S C interface. The interface

records rising edges of the EN/SET pin, and

3113.2004.07.1.4

1...4 5 678 9 10...14

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