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MAX8900A, MAX8900B, MAX8900C
1.2A Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring
JEITA-Compliant Battery Chargers that Minimize Solution Size and Heat in Space-Constrained Consumer Electronics
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Status
Active: In Production.
Description
The MAX8900_ is a high-frequency, switch-mode charger for a 1-cell lithium ion (Li+) or lithium polymer (Li-Poly) battery. It delivers up to 1.2A of current to the battery from 3.4V to 6.3V (MAX8900A/MAX8900C) or 3.4V to 8.7V (MAX8900B). The 3.25MHz switch-mode charger is ideally suited to small portable devices such as headsets and ultra-portable media players because it minimizes component size and heat.
Several features make the MAX8900_ perfect for high-reliability systems. The MAX8900_ is protected against input voltages as high as +22V and as low as -22V. Battery protection features include low voltage prequalification, charge fault timer, die temperature monitoring, and battery temperature monitoring. The battery temperature monitoring adjusts the charge current and termination voltage as described in the JEITA* specification for safe use of secondary lithium-ion batteries.
Charge parameters are easily adjustable with external components. An external resistance adjusts the charge current from 50mA to 1200mA. Another external resistance adjusts the prequalification and done current thresholds from 10mA to 200mA. The done current threshold is very accurate achieving ±1mA at the 10mA level. The charge timer is adjustable with an external capacitor.
The MAX8900_ is available in a 0.4mm pitch, 2.44mm x 2.67mm x 0.64mm WLP package.
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Data Sheet
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An evaluation kit is available: MAX8900AEVKIT
Key Features
- 3.25MHz Switching Li+/Li-Poly Battery Charger
- JEITA Battery Temperature Monitor Adjusts Charge Current and Termination Voltage
- 4.2V ±0.5% Battery Regulation Voltage (Alternate 4.1V Target Available on Request)
- Adjustable Done Current Threshold
- Adjustable from 10mA to 200mA
- ±1mA Accuracy at 10mA
- High-Efficiency and Low Heat
- Uses a 2.0mm x 1.6mm Inductor
- Positive and Negative Input Voltage Protection (±22V)
- Up to +20V Operating Range (Alternate OVLO Ranges Available on Request)
- Supports No-Battery Operation
- Fault Timer
- Charge Status Outputs
- 2.44mm x 2.67mm x 0.64mm Package
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Applications/Uses
- Digital Cameras
- eBook
- GPS, PND
- Headsets and Media Players
- Smartphones
- USB Charging
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Key Specifications:
| Battery Chargers |
| Part Number |
Cell Chemistry |
Lithium Ion Cells |
Protected VIN
(V) |
Charging VIN
(V) |
Charge Rate Set by |
Max. ICHG
(A) |
Charge Termination |
Charge Regulation |
EV Kit |
Oper. Temp.
(°C) |
Package/Pins |
| max |
max |
≥ |
| MAX8900 |
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1 |
22 |
20 |
Resistor |
1.2 |
Timer |
Switchmode |
Yes |
-40 to +85 |
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See All Battery Chargers (68)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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| *JEITA (Japan Electronics and Information Technology Industries Association) standard, "A Guide to the Safe Use of Secondary Lithium Ion Batteries in Notebook-type Personal Computers" April 20, 2007. |
Diagram
Simplified Applications Circuit
More Information
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Information Index
Document Ref.: 19-5063
Rev 3;
2011-02-15
This page last modified: 2011-02-17
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