XYT6982概述：
The XYT6982 is a highly integrated synchronous boost charger for two Li-ion batteries in series (up to 1.5A in QFN and 2A in ESSOP10). For different portable applications, the charging current can be programmed using external resistors.
XYT6982 has four charging processes: short circuit (SC), trickle (TC), constant current (CC) and constant voltage (CV) : Short circuit (SC) can charge 0V batteries; Trickle charging (TC) A battery that can be fully discharged by trickle charging; Constant current charging (CC) can quickly fill the battery; Constant voltage charging (CV) ensures a safe full battery.
The charging cutoff voltage of the XYT6982 can be adjusted by an external resistor, and the charging current can also be set by an external resistor. When the charging current drops to 1/10 of the set value, the XYT6982 will automatically end the charging process, continuously detect the battery voltage, and automatically recharge when it drops to a certain threshold. When the input voltage (USB source or AC adapter) is removed, the battery leakage is 25uA.
The XYT6982 integrates charging and full tips, as well as exception indications. Powerful protection features include input overvoltage protection (OVP), battery OVP, battery short circuit protection, thermal shutdown, battery temperature monitor, and configurable timer to prevent prolonged charging of dead batteries.
XYT6982特性：
Configurable charging current up to 2A
Support 8.4V, 8.6V, 8.7V, 8.8V full voltage
Input voltage protection up to 28V
Wide input operating voltage range: 3.0V~6V
Peak efficiency up to 96% and heavy-duty efficiency up to 90%
External switch off EN function
Adjustable charging current up to 2A
Supports thermal regulation of charging current up to 110 ° C
Complete charging status indication
Ultra-low thermal resistance ESSOP10 package (θJC=3.9℃/W)
Programmable adaptive input current limiting protection
Provides indication and control after load shutdown when battery is low
Input protection function: input undervoltage lock, input overvoltage protection,
Battery end protection: charge timeout protection, short circuit protection, overvoltage protection
160℃ overtemperature protection
Supports hot swap of battery packs with integrated NTC resistors
XYT6982應(yīng)用：
移動(dòng)電源
手機(jī)、MP3 播放器、MP4 播放器
PSP 游戲機(jī)、NDS 游戲機(jī)
智能門鎖
XYT6982選購(gòu)指南：
QFN16 ：擁有更小的體積，便于集成，對(duì)電池的保護(hù)更優(yōu)秀，適應(yīng)更多的電池類型和輸入環(huán)境。
ESSOP10：擁有更好的散熱，支持最大 2A 充電，使用更簡(jiǎn)單。
XYT6982采購(gòu)信息：
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Part
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Package
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Top Mark
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XYT6982QV
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QFN3×3-16
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XYT6982QV
YYWWB
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XYT6982ES
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ESSOP10
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XYT6982ES
YYWWB
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YY:生產(chǎn)年代碼. WW:生產(chǎn)周代碼.B:固定版本號(hào)
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||
XYT6982典型應(yīng)用拓?fù)洌?/strong>
NOTE：
升壓輸出引腳 BD。10μF 穩(wěn)壓陶瓷電容需盡量靠近芯片，并且從 BD 到 GND 的回路盡量短。
NTC 電阻一般位于電池內(nèi)部，圖中為方便展示，虛線框內(nèi)為電池包。NTC 典型應(yīng)用中需使用 B 值為 3380K 的 10K 阻值的 NTC 電阻與 R2(3K)電阻器串聯(lián)再與 R1(16K)電阻器串聯(lián)接于 VDD 引腳，這種搭配可保證電池在 0℃~60℃區(qū)間正常充電。如使用其他搭配，請(qǐng)參照第八頁(yè) NTC 功能解釋中的給出的各溫度閾值的 NTC 電壓進(jìn)行設(shè)計(jì)或可咨詢 FAE。
對(duì)底部 ePad GND 引腳，應(yīng)使用較大覆銅區(qū)域連接到 PCB 地平面，這有助于最大限度的減小 PCB 傳導(dǎo)損耗和熱應(yīng)力，防止因芯片溫度過(guò)高導(dǎo)致的充電電流下降。
LED 指示燈使用時(shí)需接限流電阻到 VDD，推薦 3K。
XYT6982典型應(yīng)用拓?fù)洌‥SSOP10 封裝）：
NOTE：
升壓輸出引腳 BD。10μF 穩(wěn)壓陶瓷電容需盡量靠近芯片，并且從 BD 到 GND 的回路盡量短。
NTC 電阻一般位于電池內(nèi)部，圖中為方便展示，虛線框內(nèi)為電池包。NTC 典型應(yīng)用中需使用 B 值為 3380K 的 10K 阻值的 NTC 電阻與 R2(3K)電阻器串聯(lián)再與 R1(16K)電阻器串聯(lián)接于 VDD 引腳，這種搭配可保證電池在 0℃~60℃區(qū)間正常充電。如使用其他搭配，請(qǐng)參照第八頁(yè) NTC 功能解釋中的給出的各溫度閾值的 NTC 電壓進(jìn)行設(shè)計(jì)或可咨詢 FAE。
對(duì)底部 ePad GND 引腳，應(yīng)使用較大覆銅區(qū)域連接到 PCB 地平面，這有助于最大限度的減小 PCB 傳導(dǎo)損耗和熱應(yīng)力，防止因芯片溫度過(guò)高導(dǎo)致的充電電流下降。
LED 指示燈使用時(shí)需接限流電阻到 VDD，推薦 3K。
XYT6982引腳排列：
XYT6982功能框圖：
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