Datasheet > A8503

A8503

更新时间： 2024-01-24 10:31:19

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
17页	409K
描述
High Efficiency 6-Channel, 2 MHz, WLED/RGB Driver

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中文翻译

获取价格

技术参数
数据手册

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A8503 技术参数

生命周期：	Obsolete	Reach Compliance Code：	unknown
风险等级：	5.82	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

A8503 数据手册

High Efficiency 6-Channel, 2 MHz, WLED/RGB Driver for

Medium Displays, with Integrated 55 V Power Switch

A8503

ELECTRICAL CHARACTERISTICS¹Valid using circuit shown in figure 1, T_A= T_J= 25°C except indicates specifications

guaranteed from −40°C to 105°C, V_IN= 5.0 V, EN = PWM = V_IH, R_ISET= 12.4 kΩ, R_FSET= 34 kΩ, MODE = AGND, unless otherwise

noted

Characteristics

Input Voltage Range

Undervoltage Lockout Threshold

Symbol

V_IN

Test Conditions

Min.

Typ.²

Max.

Unit

4.2

–

5.5

V_UVLO

V_INfalling

–

0.1

4.0

–

Undervoltage Lockout Hysteresis Window V_UVLOHYS

Switching, at no load

–

ꢀA

Shutdown, EN= V_IL, T_A= 25°C

Standby, EN = V_IH, PWM = V_IL

0.1

Supply Current

I_VIN

Boost Controller

Switching Frequency

f_SW

1.2

–

1.5

1.9

–

MHz

Minimum Switch Off-Time

Minimum Switch On-Time

Logic Input Levels (EN and PWM pins)

Input Voltage Level Low

t_off(min)

t_on(min)

–

V_IL

V_IH

–

1.5

–

0.4

–

Input Voltage Level High

Input Leakage Current

I_ILKG

EN = PWM = 5 V

100

–

ꢀA

Overvoltage Protection

Output Overvoltage Threshold

Overvoltage Protection Leakage Current

Overvoltage Protection Sense Current

Boost Switch

V_OVP

–

0.1

240

–

I_OVPLKGV_OVP= 22 V, R_OVP= 0 Ω, EN = V_IL

ꢀA

I_OVPH

Switch On-Resistance

R_DS(on)

I_SWLKG(B)V_SW= 22 V

I_SWLIM

I_SW= 1 A

–

250

0.1

2.7

–

mΩ

ꢀA

Switch Leakage Current

Switch Current Limit

LED Current Sinks

LEDx Pin Regulation Voltage

I_SETto I_LEDxCurrent Gain

ISET Pin Voltage

V_LEDx

–

600

320

1.235

–

A/A

A_ISET

V_ISET

I_SET

I_SET= 100 ꢀA

–

ISET Allowable Current Range

100

ꢀA

LEDx Current Accuracy³

LEDx Current Matching⁴

Switch Leakage Current (LEDx)

LED Short-Detect Voltage

Err_ILEDXLED1 through LED6 = 0.6 V, at 100% Current

–3

–

±0.6

0.1

–

μA

I_SET= 100 μA, LED1 though LED6 = 0.6 V, at 100%

Current

∆I_LEDX

I_SWLKG(L)V_LEDx= 12 V, EN = 0

LEDx pin voltage level that forces latched shutdown,

MODE = low

V_SC

–

18.7

Continued on the next page…

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

1 2 3 456 7 8...17

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