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MAX1925

Features: Small (4mm ✕ 4mm) Package4.25V to 12V Input Range (MAX1926)Overvoltage Lockout at 6.1V (MAX1925)±0.75% Battery Regulation VoltageSet Charge Current with One ResistorAutomatic Input Power SenseLED (or Logic-Out) Charge Status and Fault IndicatorProgrammable Safety TimerAutorestart ...

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SeekIC No. : 004409434 Detail

MAX1925: Features: Small (4mm ✕ 4mm) Package4.25V to 12V Input Range (MAX1926)Overvoltage Lockout at 6.1V (MAX1925)±0.75% Battery Regulation VoltageSet Charge Current with One ResistorAutomatic Input ...

MAX1925 Data Sheet

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Part Number:
MAX1925
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/27

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Product Details

Description



Features:

 Small (4mm ✕ 4mm) Package
 4.25V to 12V Input Range (MAX1926)
 Overvoltage Lockout at 6.1V (MAX1925)
 ±0.75% Battery Regulation Voltage
 Set Charge Current with One Resistor
 Automatic Input Power Sense
 LED (or Logic-Out) Charge Status and Fault Indicator
 Programmable Safety Timer
 Autorestart at Cell = 4V
 Thermistor Monitor Input


Application

Digital Cameras
Self-Charging Battery Packs
PDAs
Cradle Chargers


Pinout

Connection Diagram


Specifications

IN, INP, ACON to GND...........................................-0.3V to +14V
CHG, EXT to PGND ...................................-0.3V to (VINP + 0.3V)
CS, BATT, EN, THRM to GND ..................................-0.3V to +6V
CT to GND................................................................-0.3V to +4V
EN, THRM, CT to IN................................................-14V to +0.3V
INP to IN ..............................................................-0.3V to +0.3V
PGND to GND .......................................................-0.3V to +0.3V
CS to BATT............................................................-0.3V to +0.3V
EXT Continuous RMS Current.........................................±100mA
Continuous Power Dissipation (TA = +70°C)
    Exposed Paddle Soldered to Board
    (derate 16.9mW/°C above +70°C).............................1349mW
    Exposed Paddle Unsoldered
    (derate 9mW/°C above +70°C)....................................721mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C


Description

The MAX1925/MAX1926 single-cell lithium-ion (Li+) switch-mode battery chargers use an external PMOS pass element step-down configuration. Charge current is programmable, and an external capacitor sets the maximum charge time.

Additional features include automatic input power detection (ACON output), logic-controlled enable, and temperature monitoring with an external thermistor. The MAX1925 disables charging for inputs greater than 6.1V, while the MAX1926 charges for inputs between 4.25V and 12V.The MAX1925/MAX1926 feature two precondition levels to restore near-dead cells. The devices source 4mA to a cell that is below 2V while sourcing C/10 to a cell between 2V and 3V. Full charge current is then applied above 3V. A CHG output drives an LED to indicate charging (LED on) and fault conditions (LED blinking).

The MAX1925/MAX1926 are available in a 12-pin 4mm ✕ 4mm thin QFN package and are specified over the extended temperature range (-40°C to +85°C). An
evaluation kit is available to speed design.




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