PRELIMINARY
CM9112
Dual Inputs Dual Outputs High Accurate Fast Charger
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Monolithic linear charger requires no inductors,
external sense resistors or blocking diodes
4.75V to 6.50V operating input voltage range
It can support up to 30V on Adaptor input and 7V
on USB input
Up to 1.5A total system and charging current
Provides power to the host system and charges
the battery at the same time
Supports AC wall adapter and USB input
4.2V/450mA, available for host system under
Adapter input
It provides 0.5% accuracy of CV mode for 4.2V
An optional 0.1µF cap on CT pin programs 30 min./
60 min. timeout for Precharge/Termination.
Two Thermal limits controls chip temperature and
prevents overheating
Remote sensing pin for Battery voltage
Pin to pin shortage protection
Maximum of 1µA battery drain current
Optional Battery thermistor (NTC) interface
TQFN-16, RoHS compliant lead-free package
Product Description
The CM9112 is an integrated linear-mode charger for a
single-cell, Lithium-ion battery. It provides both charg
ing current for the battery and power for the host sys
tem. It can deliver charging current up to 1A and
system current up to 450mA at the same time. It takes
power either from AC Adapter or USB Adapter. When
both are present it automatically chooses AC Adapter
as input.
It requires no external blocking diodes or current sense
resistors and uses 2 external resistors to program dif
ferent charging current under AC Adapter or USB
inputs.
The CM9112 provides Precharge Mode, Constant Cur
rent Mode (Fast-charge), Constant Voltage Mode and
Termination by low current detection. Programmable
timeout for Precharge and Termination and Thermistor
interface to check Battery Temperature are optional
available to the users.
The CM9112 is protected against the use of a wrong
high voltage Adapter up to 30V. An antiringing protec
tion on Adaptor input allows the use of a cheaper adap
tor without need of a shock inductor.
Pin to pin shortage protection makes it friendly to the
users against accidental handling during mounting or
checking. The CM9112 is packaged into a miniature
16-pin TQFN package and operates between –40°C
and 85°C ambient.
Applications
•
•
•
Cellular phones and smart phones
Pocket computers and PDAs
Digital Still Camera
Typical Application
AD
(AC
Adapter )
Q1
10k
1k
1k
VIN
GAD
33
STAT1 STAT2
VSYS
VREF
VOUT
4k
Q2
0.1u
4.2V/450mA
4.7u
VAD
USB
USB
GND
ENA
ISET1
5k
CM9112
Li-ion Battery
BSEN
THERM
ISET2
2.5k
CT
NTC
0.1u
©
2006 California Micro Devices Corp. All rights reserved.
07/06/06
SYSTEM
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
1
PRELIMINARY
CM9112
Package Pinout
PACKAGE / PINOUT DIAGRAM
TOP VIEW
(Pins Down View)
Pin 1
Marking
VSYS
GAD
VAD
VIN
BOTTOM VIEW
(Pins Up View)
13
14
15
16
15
14
13
USB
GND
ISET1
VREF
1
2
3
4
12 BSEN
11 VOUT
10 THERM
9 STAT1
12
11
10
9
16
1
CM9112
CT 7
STAT2 8
8
7
6
ISET2 5
ENA 6
CM9112-00QE
16-Lead TQFN Package (4mm x 4mm)
Note: This drawing is not to scale.
PIN DESCRIPTIONS
LEAD(s)
NAME
DESCRIPTION
1
2
USB
GND
ISET1
USB compliant power input pin.
Ground pin.
Pin to set the maximum USB input current; Also, reflects actual charging current. A
resistor between this pin and ground sets the charge current,
I
CH
,
R
ISET1
= 1000
×
2.5V
-----------------------------
-
I
CC
3
4
VREF
ISET2
4.2V, 2mA 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
,
1000
×
2.5V
R
ISET2
=
-----------------------------
-
I
CC
5
6
ENA
CT
Enable pin. Logic high (default value) enables charging. Logic low disables charg
ing. ENA does not effect the VSYS output.
Pin for capacitor, C
T
, for programming the Precharge and Termination timeout
period.
Timeout1[min]=300 x C
T
[μF]
Timeout2[min]=600 x C
T
[μF]
Charging status indicator 2 pin (open-drain output).
Charging status indicator 1 pin (open-drain output).
Thermistor input pin from battery monitoring circuit.
7
8
9
10
STAT2
STAT1
THERM
©
2006 California Micro Devices Corp. All rights reserved.
2
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
5
00QE
GND
PAD
2
3
4
l
www.cmd.com
07/06/06
PRELIMINARY
CM9112
Ordering Information
PIN DESCRIPTIONS
11
12
13
14
15
16
VOUT
BSEN
VSYS
GAD
VAD
VIN
Charger output pin (Battery/RF High Power).
Battery voltage remote sense pin.
Power output pin to the host system 4.2V/450mA.
Gate drive to external P-MOSFET for adapter input pin.
Adapter input voltage pin.
Positive input supply voltage pin, which powers the charger.
PART NUMBERING INFORMATION
Lead Free Finish
Pins
16
Package
TQFN
Ordering Part Number
1
CM9112-00QE
Part Marking
CM9112
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
VAD, GND to GND
V
OUT
, V
SYS,
USB to GND
ENA, I
SET1
, I
SET2
to GND
STAT1, STAT2 to GND
BSEN
,
V
REF,
CT, THERM to GND
Storage Temperature Range
Operating Temperature Range (Ambient)
Lead Temperature (Soldering, 10sec)
RATING
±1
[GND - 0.3] to +6.5
[GND - 0.3] to +30
[GND - 0.3] to +7.0
[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
V
V
°C
°C
°C
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE 1)
SYMBOL
V
AD
V
USB
I
Q
PARAMETER
VAD Operation range
USB Operation range
Quiescent Current
Charging modes, exclud
ing current to and STAT1,
STAT2 and THERM pins.
CONDITIONS
MIN
4.75
4.50
2
TYP
5.0
MAX
6.50
5.25
UNITS
V
V
mA
©
2006 California Micro Devices Corp. All rights reserved.
07/06/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
l
Tel: 408.263.3214
l
Fax: 408.263.7846
l
www.cmd.com
3
PRELIMINARY
CM9112
Specifications (cont’d)
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE 1)
SYMBOL
I
SHDN
PARAMETER
Shutdown Supply Current
CONDITIONS
ENA = "LOW", excluding
current to STAT1, STAT2
and THERM pins.
Both AC Adapter and
USB removed
MIN
TYP
50
MAX
100
UNITS
µA
I
REV
Battery Reverse Current
0.5
1
µA
VAD/USB Supply Voltage
UVLO
VAD
UVLO threshold for VAD
OVP
VAD
OVP threshold for VAD
UVLO
HYS_VAD
UVLO,OVP Hysterezis for
VAD
Total input current under
I
IN_AD
Adaptor input
I
IN_USB
4.75
6.2
4.8
6.4
300
4.85
6.5
V
V
mV
V
IN
=5.0V; Adaptor in
I
IN_AD
=
I
SYS +
I
VOUT
1700
I
IN_USB
=
2500
---------------------------------
-
R
SET1(kΩ)
mA
mA
Total input current with USB V
IN
=5.0V; USB in, Adap
plugged-in and Adapter out tor out
USB switch Rds(on)
Charger Function
I
PR
Precharge Mode Current
I
IN_USB
= 500mA
V
OUT
< 3.2V; Adaptor in
0.85 x I
PR
150
I
VOUT =
250
I
PR
= --------------------------
-
R
SET2
(
k
Ω)
200
1.14 x I
PR
mΩ
mA
V
OUT
< 3.2V; USB in,
Adaptor out
V
CC
I
CC
CC Mode Voltage Threshold
CC Mode Charging Current V
OUT
> 3.5V; Adaptor in
0.85 x I
PR
I
VOUT =
250
-
I
PR
= --------------------------
R
SET1
(
k
Ω)
1.14 x I
PR
mA
3.20
0.92 x I
CC
3.30
I
VOUT =
2500
I
CC
= --------------------------
-
R
SET2
(
k
Ω)
3.40
1.08 x
I
CC
1.08 x
I
CC
V
mA
V
OUT
> 3.5V; USB in,
Adaptor out
0.92 x I
CC
I
VOUT =
2500
I
CC
= --------------------------
-
R
SET1
(
k
Ω)
mA
V
CV
I
TERM
CV Mode Voltage Threshold
Charging Termination Cur
rent
V
OUT
> 4.190V; Adapter
in
4.190
0.8 x
I
TERM
4.200
I
VOUT =
25
-
I
TERM
= --------------------------
R
SET2
(
k
Ω)
I
VOUT =
25
I
TERM
= --------------------------
-
R
SET1(kΩ)
4.100
4.210
1.2 x
I
TERM
V
mA
V
OUT
> 4.190V; USB in,
Adapter out
0.8 x
I
TERM
1.2 x
I
TERM
mA
V
RCH
Recharge Mode Threshold
4.090
4.110
V
©
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
07/06/06
PRELIMINARY
CM9112
Specifications (cont’d)
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE 1)
SYMBOL
CT
OTP
OCP
R
DSON
T
PR
T
TER
VREF
V
REF
PARAMETER
Constant-temperature
Mode, Limit
Over-temperature Protec
tion, Limit
Over-Current Charging
(OCP), Limit
R
DSON
of Charger MOSFET
Precharge Timeout
(Note 4)
Termination Timeout
(Note 4)
Regulated Voltage V
REF
CONDITIONS
(Note 2)
(Note 3)
MIN
95
130
1.5
I
CC
= 500mA
Adaptor in; BSEN < 3.2V,
CT=0.1µF, 1%
Adaptor in; BSEN >
4.19V, CT=0.1µF, 1%
I
REF
< 1mA
100
27
54
TYP
105
140
1.7
120
30
60
MAX
125
150
1.8
150
33
66
UNITS
C
C
A
mΩ
Min.
Min.
4.190
4.200
0.25
4.210
V
Ω
VSYS (Available only with Adapter plugged-in)
(Note 5)
MOSFET R
ON
R
DSON
V
SYS
I
SYS
I
LIMIT
Output Voltage Load Regu I
OUT
= 10mA to 300mA
lation
I
OUT
= 10mA to 450mA
Output Current available
3.9V<VSYS<4.3
4.1
3.9
10
1200
4.2
4.0
1500
4.3
4.1
450
V
V
mA
mA
Over-Current Shut-down
(Note 6)
Threshold
Control Function
BSEN Pin Leakage Current V
IN
= 0
I
BSEN
V
STAT1
V
STAT2
V
IH EN
V
IL EN
STAT1, STAT2 (Open Drain) I
SINK
= 5mA
Output Low Voltage
I
SINK
= 20mA
ENA Input High Level
ENA Input Low Level
V
IN
= 5.0V
(Note 9)
V
IN
= 5.0V
(Note 9)
0.2
1.0
0.1
0.5
µA
V
V
V
1.5
0.4
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
V
V
V
mV
Thermistor Function
(Note 7, 8)
V
BH
Battery HOT Voltage
Threshold (THERM Pin)
V
BC
Battery COLD Voltage
Threshold (THERM Pin)
Hysterezis of V
BH
, V
BC
Note 1: 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 VSYS
with current from Adapter/USB, and switches VSYS (Baseband) to VOUT(Battery). To resume the charging function, a tog
gle of VAD/USB is required.
Note 4: The timeout can be disabled by connecting the CT pin to VIN. When enabled, both Timeout1 and 2 are proportional to the
value of the capacitor connected on the pin CT. However, the ratio Timeout2/Timeout1 is constant and equal to two. The tim
ing periods are digital, internally generated, based on a clock rate programmable by an external capacitor connected in the
CT pin. Timeout feature is available only with AC Adaptor plugged in. Under USB input, both timeout are disabled to allow
longer charging time due to low input current available.
Note 5: When both the Adapter and USB are removed, VSYS is switched over to battery, through an external MOSFET, Q2.
Note 6: When the VSYS maximum current limit is reached, LDO1 regulates this current by decreasing VSYS. However, VSYS can
not go below VOUT (battery) by more than one diode’s forward voltage (Vfwd) due to the body diode of the external MOS
©
2006 California Micro Devices Corp. All rights reserved.
07/06/06
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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