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
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.
•
•
•
•
Applications
•
•
•
•
Cellular phones and smart phones
PDAs Portable Media Viewers
Digital Still Camera
Cradle Chargers
Typical Application
Vin
VIN
4.7u
5k
VSTB
BSEN
1u
Vout
4k
4.7u
GND
ISET
ENA
VREF
CM9101
VOUT
THERM
STAT
1k
10k
Li-ion
Battery
0.1u
©
2006 California Micro Devices Corp. All rights reserved.
06/30/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
1
PRELIMINARY
CM9101
Package Pinout
PACKAGE / PINOUT DIAGRAM
TOP VIEW
(Pins Down View)
Pin 1
Marking
VSTB
VIN
NC
NC
BOTTOM VIEW
(Pins Up View)
13
14
15
16
15
14
13
NC
GND
NC
VREF
1
12 BSEN
12
11
10
9
16
1
CM9100
00QE
2
3
4
11 VOUT
10 THERM
9 STAT
GND
PAD
2
3
4
8
7
6
ISET 5
ENA 6
NC 7
CM9101-00QE
16-Lead TQFN Package (4mm x 4mm)
Note: This drawing is not to scale.
LEAD(s)
NAME
NC
GND
NC
VREF
ISET
DESCRIPTION
No connect.
Ground pin.
No connect.
4.2V, 2 mA reference output pin.
Pin to set the maximum charging current in the Fast charge (CC) mode. Also, reflects actual
charging current. A resistor between this pin and ground sets the charge current, I
CH
:
R
ISET
= 1000
×
2.5V
-----------------------------
-
I
CC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
ENA
NC
NC
STAT
THERM
VOUT
BSEN
VSTB
NC
NC
VIN
Enable pin. Logic high (default value) enables charging. Logic low disables charging.
No connect.
No connect.
Charging status indicator pin (open-drain output).
Thermistor input pin from battery monitoring circuit.
Charger output pin.
Battery voltage remote sense pin.
4.2V output pin, connect a cap to ground to increase stability.
No connect.
No connect.
Positive input supply voltage pin, which powers the charger.
©
2006 California Micro Devices Corp. All rights reserved.
2
NC 8
PIN DESCRIPTIONS
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
5
Fax: 408.263.7846
l
www.cmd.com
06/30/06
PRELIMINARY
CM9101
Ordering Information
PART NUMBERING INFORMATION
Lead Free Finish
Pins
16
Package
TQFN
Ordering Part Number
1
CM9101-00QE
Part Marking
CM9101 00QE
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
ESD Protection (HBM)
V
IN
to GND
Pin Voltages
V
OUT
, V
STB
to GND
ENA, I
SET
, STAT to GND
BSEN
,
THERM, V
REF
to GND
Storage Temperature Range
Operating Temperature Range (Ambient)
Lead Temperature (Soldering, 10sec)
RATING
±2
[GND - 0.3] to +6.5
[GND - 0.3] to +6.5
[GND - 0.3] to +6.5
[GND - 0.3] to +6.5
-65 to +150
-40 to +85
300
UNITS
kV
V
V
V
V
°C
°C
°C
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE 1)
SYMBOL
V
IN
UVLO
I
Q
PARAMETER
VIN Supply Voltage
UVLO Cut-in Threshold
Quiescent Current
CONDITIONS
V
IN
All outputs are at no load
Charging modes, exclud
ing current to I
SET
and
STAT pins. All outputs are
at no load.
V
IN
= 5.0V, ENA = low,
excluding current to I
SET
and STAT pins.
V
IN
= 0V (100Ω - resistor
to ground), V
BAT
= 4.2V
V
BSEN
< 3.2V
0.85 x I
PR
MIN
4.75
3.3
TYP
3.5
2
MAX
6.5
3.6
UNITS
V
V
mA
I
SHDN
Shutdown Supply Current
50
100
µA
I
DR
Battery Drain Current
0.5
1
µA
Charger Function
I
PR
Precharge Mode Current
250
I
PR
= -----------------------
-
R
SET
(
k
Ω)
3.30
1.14 x I
PR
mA
V
CC
CC Mode Voltage Threshold
3.20
3.40
V
©
2006 California Micro Devices Corp. All rights reserved.
06/30/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
3
PRELIMINARY
CM9101
Specifications (cont’d)
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE 1)
SYMBOL
I
CC
PARAMETER
CONDITIONS
CC Mode Charging Current, V
BSEN
> 3.5V
MIN
0.92 x I
CC
TYP
2500
I
CC
= -----------------------
-
R
SET
(
k
Ω)
4.200
100
I
TERM
= -----------------------
-
R
SET
(
k
Ω)
4.100
105
140
1.0
120
4.200
4.200
0.2
MAX
1.08 x
I
CC
4.210
1.2 x
I
TERM
4.110
125
150
1.1
150
4.210
4.300
1.0
0.1
0.5
1.5
0.4
V
IN
= 5.0V
(Note 6)
V
IN
= 5.0V
(Note 6)
0.9 x V
BH
0.9 x V
BC
80
V
BH
= 0.5 x V
IN
V
BC
= 7/8 x V
IN
100
1.1 x V
BH
1.1 x V
BC
120
UNITS
mA
V
CV
I
TERM
CV Mode Voltage Threshold
Charge Termination Current V
BSEN
> 4.190V
4.190
0.8 x
I
TERM
4.090
(Note 2)
(Note 3)
(Note 4)
I
CC
= 500mA
I
REF
< 1mA
95
130
0.9
100
4.190
4.100
V
mA
V
RCH
CT
OTP
LIMIT
OCP
LIMIT
R
DSON
VREF
V
REF
VSTB
V
STB
Recharge Mode Threshold
Constant-temperature
Mode, Limit
Over-temperature Protec
tion, Limit
Over-current Charging
(OCP), Limit
R
DSON
of Charger MOSFET
Regulated Voltage V
REF
Regulated Voltage V
STB
V
C
C
A
mΩ
V
V
µA
V
V
V
V
V
V
mV
Control Function
BSEN Pin Leakage Current V
IN
= 0
I
BSEN
V
STAT
V
IH EN
V
IL EN
STAT (Open Drain) Output
Low Voltage
ENA Input High Level
ENA Input Low Level
I
SINK
= 5mA
I
SINK
= 20mA
Thermistor Function
(Note 4, 5)
Battery HOT Voltage
V
BH
Threshold (THERM Pin)
V
BC
Battery COLD Voltage
Threshold (THERM Pin)
Hysterezis of V
BH
, V
BC
Note 1: V
IN
= 5.0V. All outputs are on. T
A
= 25°C unless otherwise specified.
Note 2: When chip temperature reaches 105°C, the IC’s internal thermal limit will maintain this temperature by decreasing the pro
grammed charge current.
Note 3: When chip temperature reaches 140°C, the IC goes into a latched shutdown mode. It stops charging, stops supplying
V
OUT
). To resume the charging function, a toggle of V
IN
is required.
Note 4: This feature can be disabled by connecting the THERM pin to GND.
Note 5: This function requires a Thermistor connected between the THERM pin and GND. Another resistor connected between
THERM pin and V
IN
is required, its value should equal the Thermistor Hot Value (at 50°C). In order to catch both the 0°C
and 50°C thresholds (typical range for Li-ion battery) use Thermistors following 7/1 ratio (Thermistor COLD/Thermistor
HOT=7).
Note 6: If the battery HOT/COLD detection identifies a condition outside the thresholds, the IC stops charging the battery and waits
for the temperature to return to the normal value.
©
2006 California Micro Devices Corp. All rights reserved.
4
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
06/30/06
PRELIMINARY
CM9101
Typical Performance Curves
Charging Algorithm
Battery Emulator, Cbattery = 30 mF
R
ISET
= 5 k
Ω
Ichg_cc=500mA
CV mode = 4.2V
Battery voltage
Battery voltage
Charge current
CC mode = 3.3V
Charge current
Ichg_pr=50mA
Ichg_term=25mA
Time (2 ms/div)
Time (2 ms/div)
Battery Current Thresholds
Battery Voltage Thresholds
Functional Block Diagram
VIN
OCP
CM9101
Current
Limit
Qc
VSTB
VOUT
BSEN
Charger
Control
ENA
THERM
OTP
GND
Over-Temp
Limit
VREF
LDO
STAT
ISET
©
2006 California Micro Devices Corp. All rights reserved.
06/30/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
5
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