CM9101 Datasheet, PDF (1/12 Pages) California Micro Devices Corp – Compact Cost-effective Fast Charger

PRELIMINARY
CM9101
Compact Cost-effective Fast Charger
Features
• Monolithic linear charger requires no inductors,
external sense resistors or blocking diodes
• A few external components are required
• 4.75V to 6.5V operating input voltage range.
• Battery temperature monitor with thermistor (NTC)
interface
• Programmable the charging current to achieve the
fastest charging rate without the risk of overloading
the adapter
• Thermal limit control of charging current prevents
overheating
• Maximum of 1µA battery drain current
• Charging-current monitor output for system super­
vision of charging status
• TQFN-16, RoHS compliant lead-free package
Applications
• Cellular phones and smart phones
• PDAs Portable Media Viewers
• Digital Still Camera
• Cradle Chargers
Product Description
The CM9101 is an integrated linear-mode charger for
single-cell, Lithium-ion batteries. It designed for com­
pact and cost-sensitive handheld devices. It provides
programming charge current, battery temperature
monitoring, charge status indicator, charge termina­
tion, high accuracy fast charge current and automatic
charge voltage regulation. It requires no external block­
ing diodes or current sense resistors and needs only
one external resistor to program the charging current.
The CM9101 provides Precharge, Fast-charge (con­
stant-current), and Termination (constant-voltage)
charging modes. The Precharge/Termination currents
are preset to 10/5% of the Fast-charge current level. A
host system can monitor the actual charge current at
the ISET pin.
The battery temperature can continuously measured
by an external thermistor through the THERM pin.
When the chip temperature reach 140°C, the CM9101
goes into a latched shutdown mode stop charging until
the chip temperature is below 140°C will gradually
charge and 105°C resume fast charge.
When the adapter is not present, the CM9101 draws
less than 1µA of drain current from the battery in ultra
low power sleep mode.
The CM9101 is packaged in a miniature 16-pin TQFN.
It can operate over the ambient temperature range of ­
40°C to 85°C.
Typical Application
Vin
4.7u
5k
0.1u
VIN
VSTB
GND
BSEN
ISET ^CM9101 VOUT
ENA
VREF
THERM
STAT
1u
Vout
4k
4.7u
Li-ion
Battery
1k
10k
© 2006 California Micro Devices Corp. All rights reserved.
06/30/06 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 lTel: [phone] lFax: [phone] lwww.cmd.com
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