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AX3071-5V4.2A(2.4A+2.4A)QC2.0車充(Car Charger)應(yīng)用方案

AX3071規(guī)格書DataSheet

AX3071應(yīng)用資料

AX3071+AMS4004SA/AMS4006SA PCB Project Bom

AX3071+AMS4004SA/AMS4006SA Schematic

AMN4008 for 3A ? Type C application & others
AMS4210 for 3.4A ? 2.4A+1A or 3.4A
AMS4004*2 for 4.8A ? 2.4A+2.4A
AMBA4810 for 4.8A ? 2.4A+2.4A

特點：

?n?高耐壓：輸入電壓可達(dá) 40V；

?n?大電流輸出：輸出電流可達(dá) ↑ (2.+2.)

?n?OCP環(huán)路：精度±5%

n 完整保護(hù)措施：短路、過壓、過熱等完備的保護(hù)措施，保護(hù)后端用電設(shè)備的安全以及系統(tǒng)本身的可靠性

?n?Duty Cycle 0 至 90%設(shè)置

?n 內(nèi)置Soft Start Function,保護(hù)后端設(shè)備免受 Overshoot 的沖擊.

n 外置雙 N 型 Mosfet 功率開關(guān),采用同步架構(gòu)

?n?外部OCP可設(shè)定, 并提供共兩組的各別設(shè)定

?n 頻率固定為120Khz,以利EMI之通過.

n Line(Cable) Compensation 線路壓降補(bǔ)償可經(jīng)由客戶端自行設(shè)定(0V to 0.5V)

n 高可靠性，AX3071 在保障自身安全穩(wěn)定工作的同時，還充分考慮了由于生產(chǎn)因素、異常使用因素、特殊環(huán)境因素等引起的一系列特殊情況下對后端用電設(shè)備的保護(hù)，是真正的高可靠性解決方案。

?n?輸出發(fā)生短路后，系統(tǒng)進(jìn)入打嗝工作模式，不斷檢測異常狀態(tài)是否解除，有效避免持續(xù)發(fā)熱。

GENERAL DESCRIPTION 
    The AX3071 is a step down PWM controller with a driving dual output current to 4.8A. It is designed to allow for operating a wide supply voltage range from 8V to 40V. The external shutdown function can be controlled by logic level to pull COMP/EN pin down, and then comes into standby mode. The external compensation makes feedback control have good line and load regulation with flexible external design.
    The AX3071 operates in the CC(Constant output Current) mode or CV(Constant output Voltage) mode, and the OCP current value is set by current sensing resisters.
    The AX3071 is suitable for the DC/DC switching power applications when requested the current limit function. The devices are available in MSOP-10L packages and require very few external devices for operation.

FEATURES

- VIN Operate with 8V ~ 40V Supply Voltage
- VOUT Accuracy (VREF =1.0V) ±2.0% Over Line Voltage
- Dual-Channeling CC/CV Mode Control
- Cable Compensation
- External Current Limit Setting
- Output Over Voltage Protection (~120%)
- Over Temperature Protection
- Internal Soft Start ~ 5ms
- Fixed Frequency 120KHz
- UVLO Protection (min=7V, typ=7.5V, max=8V)
- Duty Cycle Range (0~90%)
- Single Pin to External Compensation and Shutdown Control
- COUT MLCC support.
- Built in Adjustable Line-Compensation
- MSOP-10L Package

APPLICATION

- Car Charger
- Portable Charger Devices
- High-Brightness Lighting
- General-Purpose DC/DC Controller with Current Limit

雙USB(2.4A*2)車充PCB: