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Description
MB39A125/126 is a DC/DC converter IC for charging Li-ion battery, suitable for down-conversion. It uses pulse width modulation (PWM) for controlling the output voltage and current independently. This IC integrates the build-in comparator for voltage detection of the AC adapter and automatically selects AC adapter or battery for power supply to the system.
Specifications and features
- High efficiency: 97% (MAX)
- Built-in two constant current control circuits
- Analog control of the charging current value (+INE1, +INE2 terminal)
- Built-in AC adapter voltage detection function (ACOK, XACOK terminal)
- External output voltage setting resistor: MB39A125
- Built-in output voltage setting resistor: MB39A126
- Built-in charge stop function at low VCC
- Output voltage setting accuracy: ±0.74% (Ta = −10 °C to +85 °C) : MB39A125; 12.6 V/16.8 V ±0.8% (Ta = −10 °C to +85 °C) : MB39A126
- Built-in high accuracy current detection amplifier (±5%) (At input voltage difference 100 mV), (±15%) (At input voltage difference 20 mV)
- In IC standby mode (Icc =0 µA Typ), make output voltage setting resistor open to prevent inefficient current loss
- Built-in soft-start circuit
- Standby current: 0 µA (Typ)
- Totem-pole type output for Pch MOS FET
Application Scenarios
This DC/DC converter IC, MB39A125/126, is widely used in various electronic devices that require charging Li-ion batteries. It is commonly applied in portable electronic devices, power banks, and other battery-powered devices.
Comparison
Advantages- High efficiency of 97% (MAX)
- Analog control of the charging current value
- Built-in AC adapter voltage detection function
- Soft-start circuit for smooth operation
Disadvantages- Output voltage setting accuracy may vary depending on the temperature
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Similar parts: 430483 , Click to view
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Datasheet
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Shopping guide
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Popular parts of the same kind
- Datasheet: Download MB39A126PFV
- Chipdatas Part: CD89-MB39A126PFV
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
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- Last Updated: 2024/07/01 08:54 +0800
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