MAX1874ETE(2003) データシートの表示（PDF） - Maxim Integrated

部品番号

コンポーネント説明

メーカー

MAX1874ETE
(Rev.:2003)

Dual-Input, USB/AC Adapter, 1-Cell Li+ Charger with OVP and Thermal Regulation

Maxim Integrated 

Dual-Input, USB/AC Adapter, 1-Cell

Li+ Charger with OVP and Thermal Regulation

ELECTRICAL CHARACTERISTICS (continued)

(VUSB = VDC = VDCLV = VEN = VUSEL = 5V, VBATT = 4.2V, VTHRM = VREF / 2, Circuit of Figure 2, TA = -40°C to +85°C, unless otherwise

noted. Typical values are at TA = +25°C.) (Note 4)

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

BATTERY VOLTAGE

BATT Regulation Voltage

BATT Prequal Voltage Threshold

BATT rising

4.1685

2.8

4.2315

V

3.2

V

REF Voltage (Buffered Output)

IREF = 0 to 500µA, 4V < VDC or VUSB < 6.5V;

2.94

does not affect BATT regulation accuracy

3.06

V

BATTERY CHARGING AND PRECHARGE CURRENT

DCI Voltage Range

DCI Voltage to BATT Current

VDCI = VREF

VDCI = VREF / 2

USB Charging Current

USEL = high

USEL = low

Prequal Charging Current

VBATT = 2.5V

BATT Input Current

BATT Shutdown Current

No DC or USB power, VBATT = 4.2V

EN = GND, USB and/or DC powered

0.1 x VREF

930

490

40

VREF

V

1070

mA

565

495

mA

95

70

mA

7.5

µA

2

µA

THERMISTOR MONITOR AND DIE-TEMPERATURE REGULATION

THRM COLD Trip Level

(Note 2)

THRM HOT Trip Level

(Note 2)

THRM Disable Threshold

0.72

0.28

50

0.76

0.30

150

VREF

VREF

mV

LOGIC INPUT/OUTPUTS AND GATE DRIVERS

DCOK Off-Leakage Current

UOK Off-Leakage Current

V DCOK = 12V, VDC = 0V

V UOK = 6.5V

DC input (% of charge current set at DCI)

8

CHG Threshold to Indicate Battery Full,

Battery Current Falling (Note 3)

USB input, USEL = 5V

20

(% of USB charging current)

CHG Logic-Low Output

Sinking 10mA sink

CHG Leakage Current

V CHG = 6.5V

EN, USEL Logic-Input High Level

1.6

1

µA

1

µA

20

%

30

0.4

V

1

µA

V

EN, USEL Logic-Input Low Level

EN, USEL Input Bias Current

0.4

V

1

µA

Note 1: BYP internally connects to the active power input (DCLV or USB). DCLV takes priority if both inputs are powered.

Note 2: These limits guarantee +5°C accuracy with 5% accuracy of thermistor beta (3450 nominal) with 2°C of hysteresis.

Note 3: The CHG output does not go high unless charge current is below the indicated threshold (as set by DCI) and the charger is in

voltage-mode operation. In 100mA USB mode, CHG goes high when the charger transitions from current to voltage mode.

Note 4: Specifications to -40°C are guaranteed by design, not production tested.

_______________________________________________________________________________________ 5

Share Link: