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參數(shù)資料
| 型號(hào)： | MAX1874EVKIT |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | MAX1874 Evaluation Kit |
| 中文描述： | MAX1874評(píng)估板 |
| 文件頁(yè)數(shù)： | 8/16頁(yè) |
| 文件大?。?/td> | 405K |
| 代理商： | MAX1874EVKIT |
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M
Dual-Input, USB/AC Adapter, 1-Cell
Li+ Charger with OVP and Thermal Regulation
8
_______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1
DCLV
Low-Voltage Charger Input. DCLV charges BATT through an internal MOSFET. Maximum operating
voltage at this pin is 6.0V. When an overvoltage protection MOSFET is connected, DCLV is connected to
DC when the input voltage is suitable for charging.
Voltage-Sense Pin for DC Input from AC Adapter. Maximum operating voltage at this pin is 18V.
CHG
is an active-low, open-drain output that goes low when the MAX1874 is charging and goes high
when both of the following conditions are met (see the
Battery Full (
CHG
)
section):
1) Charge current drops to a set threshold (Table 2).
2) The charger is in voltage mode.
2
DC
3
CHG
4
USEL
USEL is a logic input that sets USB source charging current to 500mA when USEL is logic high and to
100mA when USEL is logic low.
5
EN
Enable/Disable Input. Drive EN high to enable the device. When EN is low,
UOK
,
DCOK
, PON, and REF
remain active.
6
GND
Ground
7
DCI
The voltage at this input sets the fast-charge current when the DCLV input is powering the charger. See
the
Charging Current
section.
8
THRM
THRM pauses charging when an externally connected thermistor (10k
at +25
°
C) is at less than 0
°
C or
greater than +50
°
C. Connect to GND to disable. See the
External Thermistor Monitor (THRM)
section.
9
REF
3V Reference Output. Sources up to 500μA to bias I
DCI
and external thermistor. Bypass with 0.1μF to
GND. REF loading does not affect BATT regulation accuracy.
10
PGND
Power Ground. Connect to GND at a single, low-impedance point.
11
BYP
BYP powers internal circuitry and switches to the active input (either DCLV or USB). Bypass with a 2.2μF
capacitor to GND.
12
USB
USB Charger Input. Charges BATT through an internal MOSFET.
13
UOK
UOK
is an active-low, open-drain output that goes low to indicate when the USB input is the valid
charging source.
14
PON
PON is an active-high, open-drain output with an internal 120k
resistor to ground that goes high when
V
DC
or V
USB
> V
BATT
. PON can directly drive an external PFET that disconnects the battery from the
system load when power is applied.
15
16
BATT
DCOK
Charge Output. Connect to the positive terminal of the Li+ battery.
DCOK
is an active-low, open-drain output that goes low when 3.5V < V
DC
< 6.2V.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1875AEEG | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX1875AEEG+ | 功能描述:電壓模式 PWM 控制器 Dual 180 Out PWM Step-Down RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| MAX1875AEEG+T | 功能描述:電壓模式 PWM 控制器 Dual 180 Out PWM Step-Down RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| MAX1875AEEG-T | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX1875EEG | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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