A8530

更新时间： 2024-01-14 14:00:45

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器闪光灯
页数	文件大小	规格书
11页	477K
描述
Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver

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A8530 技术参数

生命周期：	Obsolete	Reach Compliance Code：	unknown
风险等级：	5.72	特性阻抗：	50 Ω
最大输入功率 (CW)：	46.99 dBm	最大工作频率：	4000 MHz
最小工作频率：		最高工作温度：	125 °C
最低工作温度：	-55 °C	射频/微波设备类型：	FIXED ATTENUATOR
最大电压驻波比：	1.35	Base Number Matches：	1

A8530 数据手册

Ultracompact 6-Channel Backlight

and Flash/Torch White LED Driver

A8530

ELECTRICAL CHARACTERISTICS^aVIN=ENM=3.6 V, ENF=GND, C1=C2=1 μF, CIN=COUT=4.7 μF, RSET=6.49 kΩ,

T_A=–40°C to +85°C; typical values are at T_A=25°C; unless otherwise noted

Characteristics

Symbol

Test Conditions

Min. Typ. Max. Units

Input Voltage Range

V_IN

2.7

–

5.5

Undervoltage Lockout Threshold

UVLO Hysteresis Window

V_UVLO

V_INfalling

2.25 2.45 2.60

V_UVLOHYS

–

μA

Switching in 1.5× or 2.0× mode; T_A= 25°C

ENF=ENM=GND; T_A= 25°C

Quiescent Current

I_Q

–

0.1

2.0

0.6

0.01

–

Soft-start Completion Time

ISET Bias Voltage

t_ss

–

V_ISETBIAS

V_ISETLKG

I_SET

–

ISET Leakage in Shutdown

ISET Current Range

–

μA

A/A

–

140

–

ISET to LEDx Current Ratio for LED1 through LED4

_LEDx/I_ISET100% setting, I_SET=60 μA

220

100% Output Current for LED5 and LED6

I_LED56MAXDefault 100% setting when ENF is enabled

E_ILED14ERRENF=GND, ENM=VIN

–

100 108

_LEDAccuracy for LED1 through LED4^b

±1.6

±0.5

250

150

–

LED Current Matching for LED1 through LED4^c

LED Current Matching for LED5 and LED6^c

Regulation Voltage at LEDx (1.5× and 2× modes)

1x mode to 1.5x or 1.5x to 2x mode transition voltage at LEDx

Transition–Dropout Delta^d

ΔI_LED14

ΔI_LED56

V_REG

ENF=GND, ENM=VIN

ENF=VIN, ENM=GND, 100%

ENF=ENM=VIN

–

V_trans

V_LEDxfalling

–

ΔV_dr

Measured as V_trans– V_dropout

–

1× mode (V_IN– V_OUT)/I_OUT

–

2.5

–

Open Loop Output Resistance^e

R_OUT

1.5× mode (1.5 × V_IN– V_OUT)/I_OUT

2× mode (2 × V_IN– V_OUT)/I_OUT

LED Leakage in Shutdown

Oscillator Frequency

V_LEDLKGENF=ENM=GND, V_IN=5.5 V

f_osc

0.01

μA

–

6.0

–

MHz

Open circuit at any LED that is programmed

to be in the ON state

Output Overvoltage Protection (guaranteed by design)

ENF and ENM Input High Threshold

V_ovp

V_IH

–

Input high logic threshold

1.4

ENF and ENM Input Low Threshold

Input High Current

V_IL

I_IH

I_IL

Input low logic threshold

V_IH=VIN

–

0.4

μA

Input Low Current

V_IL= GND

ENM and ENF Pulse Low Time (figure 6)

t_LO

0.5

–

250

μs

ENM and ENF Pulse High Time (figure 6)

ENM and ENF Initial Pulse High Time (figure 6)

Shutdown or Dimming Reset Delay

Thermal Shutdown Threshold

t_HI

0.5

–

μs

t_INIHI

t_SHDN

T_TSD

First ENM or ENF pulse after shutdown

Falling edge of ENF and/or ENM

20^oC hysteresis

0.5

165

^oC

–

^aSpecifications for the range T_A= –40°C to 85°C are guaranteed by design.

^bI_LEDaccuracy is defined as (I_SET×220–I_LEDAVG)/(I_SET×220).

^cLED current matching is defined as (I_LEDx– I_LEDAVG)/I_LEDAVG

^dDropout voltage V_dropoutis defined as LEDx-to-GND voltage at which I_LEDxdrops 10% below the value of I_LEDxwhen V_LEDx= 300 mV.

^eThe open loop output resistance, R_OUT, for 1.5× mode is measured when one of the LEDx pins is tied to ground or open (thus its voltage is always less

than 80 mV).

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

1 2 345 6 7...11

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