Datasheet > A8600

A8600

更新时间： 2024-02-29 20:43:54

品牌	Logo	应用领域
急速微 - ALLEGRO		汽车音响
页数	文件大小	规格书
52页	2065K
描述
Designed to provide the power supply requirements of next generation car audio and infotainment systems, the A8600 provides all the control and protection circuitry to produce...

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A8600 技术参数

生命周期：	Obsolete	Reach Compliance Code：	unknown
风险等级：	5.84	特性阻抗：	50 Ω
最大输入功率 (CW)：	48.75 dBm	最大工作频率：	2000 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：	1.25	Base Number Matches：	1

A8600 数据手册

A8600

Quadruple Output Regulator with Two High-Side Switches,

BU/ACC Voltage Detectors, and Mute Delay

Description

Features and Benefits

Designed to provide the power supply requirements of next

generation car audio and infotainment systems, the A8600

provides all the control and protection circuitry to produce

four high current regulators, each with ±1.5% accuracy. The

A8600includescontrolcircuitrytoimplementthreeadjustable,

asynchronousbuckregulatorswithintegratedMOSFETs. Also,

the A8600 provides the control circuitry, gate drivers, and

current sensing to implement a synchronous buck controller

with external MOSFETs. In standby mode, the A8600 draws

less than 50 μA from V_INof 12 V while employing pulse

frequency modulation (PFM) to deliver 3.3 V/40 μA via the

always-on regulator, SW1. The always-on regulator operates

down to at least V_INof 3.6 V (V_INfalling).

• Four independent, high current switching regulators

• Adjustable 1.0 A/±1.5% always-on asynchronous buck

regulator with an integrated 150 mΩ MOSFET (SW1)

▫ Employs PFM to deliver 3.3 V/40 μA while drawing less

than 50 μA from V_INof 12 V

▫ Operates down to at least 3.6 V_IN

• Adjustable 1.5 A/±1.5% asynchronous buck regulator with

an integrated 120 mΩ high-side MOSFET (SW2)

• Adjustable 2.0 A/±1.5% asynchronous buck regulator with

an integrated 110 mΩ MOSFET (SW3)

• Adjustable ±1.5% synchronous buck controller with

integrated gate drivers and current sensing (SW4)

• Fixed 425 kHz, interleaved PWM switching frequency

• EN/SYNC input for PWM frequency scaling

• Adjustable soft-start time for each switching regulator

• All switching regulators provide prebias startup with zero

reverse current

Features of the A8600 include: an EN/SYNC input to either

turn the A8600 on/off or increase/decrease the base pulse

width modulation (PWM) frequency, four adjustable soft-start

times, and four external compensation pins. Output voltage

monitoring of switchers SW2, SW3, and SW4 is provided

by a single, open-drain POK output. In addition, the A8600

provides two high voltage, high-side switches with foldback

overcurrent protection. These two high-side switches actively

block reverse current. The A8600 also provides direct battery

(BU) and switched (accessory) battery (ACC) detectors and

a mute pulse output with an adjustable delay.

• All switching regulators have overvoltage protection

• External compensation for all switching regulators

Continued on the next page…

Package: 48-pin LQFP (suffix JP)

Continued on the next page…

Not to scale

Switcher 1

(SW1)

Switcher 2

(SW2)

Switcher 3

(SW3)

Switcher 4

(SW4)

Adjustable

Output Voltage

Adjustable

Output Voltage

Adjustable

Output Voltage

Adjustable

Output Voltage

1.0 A_AVG/ 2.5 A_PEAK1.5 A_AVG/ 2.5 A_PEAK2.0 A_AVG/ 2.5 A_PEAK

Adjustable I

LIM

Always-On

PWM / PFM

Asynchronous

Buck

PWM

Asynchronous

Buck

PWM

Asynchronous

Buck

PWM

Synchronous

Buck

Regulator

Controller

High-Side Switch 1

Charge

Pump

BU and ACC

Detectors

(S1)

1.0 Ω Total

with

Foldback Limiting

Enable and

Synchronization

(EN/SYNC)

High-Side Switch 2

(S2)

MutePulse

with Delay

425 kHz

180° Shift

1.0 Ω Total

with

Foldback Limiting

Figure 1. A8600 major features

A8600-DS, Rev. 3

12 3 4 5 6 7...52

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