參數(shù)資料
型號(hào)： MAX4920BETD+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 18/19頁(yè)
文件大?。?/td> 0K
描述： IC CTLR OVP/OCP BATT PWR 14-TDFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
類(lèi)型： 過(guò)壓和過(guò)流控制器
應(yīng)用： 手機(jī)，數(shù)碼相機(jī)，媒體播放器
安裝類(lèi)型： 表面貼裝
封裝/外殼： 14-WFDFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 14-TDFN-EP（3x3）
包裝： 帶卷 (TR)
MAX4919B/MAX4920B/MAX4921B
GN1 Driver
An internal 5.5V supply powers the on-chip charge
pump used to drive GN1 above IN, allowing the use of
a low-cost nFET. The GN1 voltage is approximately two
times VIN until VIN exceeds 5.5V, at which point, GN1
clamps to 9.5V (MAX4919B/MAX4920B) or 8.1V
(MAX4921B).
ACOK
ACOK is an active-low open-drain output that asserts
when VUVLO <VIN < VOVLO for the 25ms debounce
period. ACOK deasserts immediately to overvoltage
and undervoltage faults. Connect a pullup resistor from
ACOK to the logic I/O voltage of the host system.
PWR_ON
PWR_ON is one of the logic inputs that enables the
internal 1.8A switch. Drive PWR_ON high to turn on the
internal switch. PWR_ON also controls the logic output
ONOK. The ONOK open-drain output is the inverse of
the PWR_ON input state (see Figure 5). Note that
ONOK is high impedance when VIN < VUVLO, and VBTI
< 2.82V (typ). If VBTI is greater than 2.15V (typ), but
less than 2.82V (typ), PWR_ON and ONOK are dis-
abled and ONOK pulls high. When BTI rises above
2.82V (typ) again, PWR_ON is again enabled and
ONOK goes back to its previous logic level before a
low condition at BTI (see Figure 6).
Battery Switchover
An internal 1.8A (min) pFET with a 100m
(typ) RON
connects BTI to the load at BTO. The internal battery
switchover FET turns on when either HP_PWR,
PWR_ON, or PWR_HOLD is high. Note that when BTI
< 2.15V, the internal switch remains inactive, regard-
less of the logic control signals.
Battery Power-Up Logic with Overvoltage
and Overcurrent Protection
8
_______________________________________________________________________________________
UVLO
OVLO
IN
ACOK
ADAPTER
VOLTAGE
ACOK
ONE-SHOT
P2
STATUS
OFF
ON
25ms DEBOUNCE PERIOD
OFF
t1SHAC
Figure 1. ACOK One-Shot Timing Diagram
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX4921BETD+ 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX4921BETD+T 功能描述:電池管理 Battery Power-Up Logic RoHS:否 制造商:Texas Instruments 電池類(lèi)型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MAX4924ELT+T 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Overvoltage Protector RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
MAX4925ELT+ 制造商:Maxim Integrated Products 功能描述:OVP PROTECTOR WITH EXTERNAL PFET - Bulk
MAX4925ELT+T 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Overvoltage Protector RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
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