Rainbow-electronics MAX1555 Bedienungsanleitung PDF herunterladen (Seite 3)

MAX1551/MAX1555

SOT23 Dual-Input USB/AC Adapter 1-Cell Li+

Battery Chargers

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Note 1: The input undervoltage lockout has 430mV of hysteresis. The charger turns on when an input rises to 3.95V (typ), and turns

off when it falls below 3.52V.

Note 2: Specifications to -40°C are guaranteed by design, not production tested.

ELECTRICAL CHARACTERISTICS

= 5V, V

USB

= 0, I

BAT

= 0, C

BAT

= 1µF, T

= -40°C to +85°C, unless otherwise noted.) (Note 2)

PARAMETER CONDITIONS MIN MAX UNITS

DC Voltage Range (Note 1) 3.7 7.0 V

DC to BAT Voltage Range 0.1 6.0 V

DC Undervoltage Lockout

Threshold

Input rising, 430mV hysteresis, V

BAT

= 3V (Note 1) 3.75 4.15 V

DC Supply Current 3mA

DC to BAT On-Resistance V

= 3.7V, V

BAT

= 3.6V 2 Ω

DC to BAT Dropout Voltage

When charging stops, V

BAT

= 4V, DC falling, 200mV

hysteresis

30 95 mV

USB

USB Voltage Range (Note 1) 3.7 6.0 V

USB Undervoltage Lockout

Threshold

Input rising, 430mV hysteresis, V

= 0, V

BAT

= 3V

(Note 1)

3.75 4.15 V

USB Supply Current V

USB

= 5V, V

= 0 3 mA

USB to BAT On-Resistance V

USB

= 3.7V, V

BAT

= 3.6V, V

= 0 4 Ω

USB to BAT Dropout Voltage

When charging stops, V

BAT

= 4V, USB falling, 200mV

hysteresis, V

= 0

30 95 mV

BAT

BAT Regulation Voltage V

or V

USB

= 5V 4.141 4.259 V

DC Charging Current V

BAT

= 3.3V, V

USB

= 0, V

= 5V 220 340 mA

USB Charging Current V

BAT

= 3.3V, V

= 0, V

USB

= 5V 80 100 mA

BAT Prequal Threshold V

BAT

rising, 100mV hysteresis 2.9 3.1 V

Prequalification Charging Current V

BAT

= 2.8V 20 80 mA

BAT Leakage Current V

= V

USB

= 0, V

BAT

= 4.2V 5 µA

POK, CHG

CHG Threshold

Charge current where CHG goes high,

BAT

falling, 50mA hysteresis

25 100 mA

CHG, POK Logic-Low Output I

CHG

, I

POK

= 10mA 300 mV

CHG, POK Leakage Current V

CHG

, V

POK

= 6V, T

= +25°C1µA

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MAX1551/MAX1555 1
Battery Chargers 1

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