Purchase MAX1926, In-stock MAX1926 From SeekIC.
Part Number: MAX1926
Description: The MAX1925/MAX1926 single-cell lithium-ion (Li+) switch-mode battery chargers use an external PMOS pa...
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MAX1926
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DataSheet
General Description
MAX1926 General 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.
MAX1926 Maximum Ratings
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
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
MAX1926 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
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
MAX1926 Typical Application
Digital Cameras
Self-Charging Battery Packs
PDAs
Cradle Chargers
Self-Charging Battery Packs
PDAs
Cradle Chargers
MAX1926 Connection Diagram
MAX1926
PDF/DataSheet Download
- Datasheet: MAX1926
- File Size: 372316 KB
- Manufacturer: MAXIM [Maxim Integrated Products]
- Click here to Download
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