SGM4056
High Input Voltage Charger
GENERAL DESCRIPTION
The SGM4056 is a cost-effective, fully integrated high
input voltage single-cell Li-ion battery charger. The
charger uses a CC/CV charge profile required by Li-ion
battery. The charger accepts an input voltage up to
26.5V but is disabled when the input voltage exceeds
the OVP threshold, typically 6.8V (SGM4056-6.8) or
10.5V (SGM4056-10.5), to prevent excessive power
dissipation. The 26.5V rating eliminates the over-
voltage protection circuit required in a low input voltage
charger.
The charge current and the end-of-charge (EOC)
current are programmable with external resistors.
When the battery voltage is lower than typically 2.55V,
the charger preconditions the battery with typically 18%
of the programmed charge current. When the charge
current reduces to the programmable EOC current
level during the CV charge phase, an EOC indication is
provided by the
CHG
pin, which is an open-drain
output. An internal thermal foldback function protects
the charger from any thermal failure.
Two indication pins (
PPR
and
CHG
) allow simple
interface to a microprocessor or LEDs. When no
adapter is attached or when disabled, the charger
draws less than 1μA leakage current from the battery.
The SGM4056 is available in Green TDFN-3×3-8L,
TDFN-2×3-8L, TDFN-2×2-8L and SOIC-8 (Exposed
Pad) packages and is rated over the -40℃ to +85℃
temperature range.
FEATURES
Complete Charger for Single-Cell Li-ion or
Polymer Batteries
Integrated Pass Element and Current Sensor
No External Blocking Diode Required
Low Component Count and Cost
Programmable Charge Current
Programmable End-of-Charge Current
Charge Current Thermal Foldback for Thermal
Protection
2.55V Trickle Charge Threshold
6.8V Input Over-Voltage Protection for SGM4056-6.8
10.5V Input Over-Voltage Protection for SGM4056-10.5
26.5V Maximum Voltage for the Power Input
Power Presence and Charge Indications
Less than 1μA Leakage Current off the Battery When
No Input Power Attached or Charger Disabled
Available in Green TDFN-3×3-8L, TDFN-2×3-8L,
TDFN-2×2-8L and SOIC-8 (Exposed Pad) Packages
APPLICATIONS
Mobile Phones
Blue-Tooth Devices
PDAs
MP3 Players
Stand-Alone Chargers
Other Handheld Devices
SG Micro Corp
www.sg-micro.com
REV. A. 2
SGM4056
PACKAGE/ORDERING INFORMATION
MODEL
V
OVP
(V)
6.8V
6.8V
6.8V
6.8V
SGM4056
10.5V
10.5V
10.5V
10.5V
TDFN-3×3-8L
TDFN-2×3-8L
TDFN-2×2-8L
SOIC-8 (Exposed Pad)
SGM4056-10.5YTDB8G/TR
SGM4056-10.5YTDC8G/TR
SGM4056-10.5YTDE8G/TR
SGM4056-10.5YPS8G/TR
PACKAGE
DESCRIPTION
TDFN-3×3-8L
TDFN-2×3-8L
TDFN-2×2-8L
SOIC-8 (Exposed Pad)
ORDER NUMBER
SGM4056-6.8YTDB8G/TR
SGM4056-6.8YTDC8G/TR
SGM4056-6.8YTDE8G/TR
SGM4056-6.8YPS8G/TR
High Input Voltage Charger
PACKAGE
MARKING
SGM
G9DB
XXXXX
SGB
XXXX
SG7
XXXX
SGM
4056-6.8YPS8
XXXXX
SGM
GADB
XXXXX
SGC
XXXX
SG8
XXXX
SGM
4056-10.5YPS8
XXXXX
PACKING
OPTION
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 2500
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 3000
Tape and Reel, 2500
NOTE: XXXX = Date Code. XXXXX = Date Code and Vendor Code.
ABSOLUTE MAXIMUM RATINGS
VIN to GND……………………...…..…………………-0.3V to 30V
PPR
,
CHG
,
EN
, IMIN, IREF, BAT to GND..…..…..-0.3V to 6V
Storage Temperature Range..............................-65℃ to +150℃
Package Thermal Resistance
TDFN-3×3-8L,
θ
JA
…………………………..…..…………..84℃/W
TDFN-2×3-8L,
θ
JA
……………………….……….………..110℃/W
TDFN-2×2-8L,
θ
JA
……………………………..…………..118℃/W
SOIC-8 (Exposed Pad),
θ
JA
………………………………..58℃/W
Junction Temperature .......................................................150℃
Operating Temperature Range ...........................-40℃ to +85℃
Lead Temperature (Soldering 10 sec)............................... 260℃
ESD Susceptibility
HBM..................................................................................4000V
MM......................................................................................200V
NOTE:
Stresses beyond those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device. These
are stress ratings only, and functional operation of the device at
these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied.
Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
CAUTION
This integrated circuit can be damaged by ESD if you don’t pay
attention to ESD protection. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions.
Failure to observe proper handling and installation procedures
can cause damage. ESD damage can range from subtle
performance degradation to complete device failure. Precision
integrated circuits may be more susceptible to damage
because very small parametric changes could cause the device
not to meet its published specifications.
SGMICRO reserves the right to make any change in circuit
design, specification or other related things if necessary without
notice at any time. Please contact SGMICRO sales office to get
the latest datasheet.
SG Micro Corp
www.sg-micro.com
2
SGM4056
PIN CONFIGURATIONS
(TOP VIEW)
SGM4056
High Input Voltage Charger
SGM4056
VIN
1
PPR
2
CHG
3
EN
4
SOIC-8 (Exposed Pad)
8
BAT
VIN
1
2
3
4
8
7
6
5
BAT
IREF
IMIN
GND
7
6
IREF
IMIN
GND
GND
PPR
CHG
EN
GND
5
TDFN-3×3-8L/TDFN-2×3-8L/TDFN-2×2-8L
PIN DESCRIPTION
PIN
1
NAME
VIN
FUNCTION
Power Input. The absolute maximum input voltage is 26.5V. A 1μF or larger value X5R ceramic
capacitor is recommended to be placed very close to the input pin for decoupling purpose. Additional
capacitance may be required to provide a stable input voltage.
Open-drain Power Presence Indication. The open-drain MOSFET turns on when the input voltage is
above the POR threshold but below the OVP threshold and off otherwise. This pin is capable to sink
15mA (MIN) current to drive an LED. The maximum voltage rating for this pin is 5.5V. This pin is
independent on the
EN
pin input.
Open-drain Charge Indication. This pin outputs a logic low when a charge cycle starts and turns to high
impedance when the end-of-charge (EOC) condition is qualified. This pin is capable to sink 15mA (MIN)
current to drive an LED. When the charger is disabled, the
CHG
pin outputs high impedance.
Enable Input. This is a logic input pin to disable or enable the charger. Drive to high to disable the
charger. When this pin is driven to low or left floating, the charger is enabled. This pin has an internal
200kΩ pull-down resistor.
System Ground.
End-of-Charge (EOC) Current Programming Pin. Connect a resistor between this pin and the GND pin
to set the EOC current. The EOC current I
MIN
can be programmed by the following equation:
2
PPR
3
CHG
4
5
EN
GND
6
IMIN
I
MIN
½
10070
0.5
(mA)
R
IMIN
where R
IMIN
is in kΩ. The programmable range covers 5% (or 10mA, whichever is higher) to 50% of
IREF. When programmed to less than 5% or 10mA, the stability is not guaranteed.
Charge-Current Programming and Monitoring Pin. Connect a resistor between this pin and the GND pin
to set the charge current limit determined by the following equation:
7
IREF
I
REF
½
12080
4
(mA)
R
IREF
8
BAT
where R
IREF
is in kΩ. The resistor should be located very close to this pin. The IREF pin voltage also
monitors the actual charge current during the entire charge cycle, including the trickle, constant-current,
and constant-voltage phases. When disabled, V
IREF
= 0V.
Charger Output Pin. Connect this pin to the battery. A 1μF or larger X5R ceramic capacitor is
recommended for decoupling and stability purposes. When the
EN
pin is pulled to logic high, the BAT
output is disabled.
SG Micro Corp
www.sg-micro.com
3
SGM4056
ELECTRICAL CHARACTERISTICS
(V
IN
= 5V, R
IMIN
= 243kΩ, T
A
= 25℃, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
High Input Voltage Charger
MIN
TYP
MAX
UNITS
RECOMMENDED OPERATING CONDITIONS
Maximum Supply Voltage
Operating
Supply Voltage
SGM4056-6.8
SGM4056-10.5
4.55
4.55
100
26.5
6.10
9.35
900
V
V
mA
Programmed Charge Current
POWER-ON RESET
Rising POR Threshold
Falling POR Threshold
VIN-BAT OFFSET VOLTAGE
Rising Edge
Falling Edge
OVER-VOLTAGE PROTECTION
Over-Voltage
Protection Threshold
OVP Threshold
Hysteresis
STANDBY CURRENT
BAT Pin Sink Current
VIN Pin Supply Current
VIN Pin Supply Current
VOLTAGE REGULATION
R
IREF
= 24.3kΩ, 4.55V < V
IN
< 6.10V,
charge current = 20mA
R
IREF
= 24.3kΩ, 4.55V < V
IN
< 9.35V,
charge current = 20mA
V
BAT
= 3.8V, charge current = 500mA,
R
IREF
= 10kΩ
I
STANDBY
I
VIN
I
VIN
Charger disabled or the input is floating
V
BAT
= 4.3V, R
IREF
= 24.3kΩ, charger disabled
V
BAT
= 4.3V, R
IREF
= 24.3kΩ, charger enabled
SGM4056-6.8
SGM4056-10.5
SGM4056-6.8
SGM4056-10.5
V
OVP
V
BAT
= 4.3V, R
IREF
= 120kΩ,
use
PPR
to indicate the comparator output.
V
OVPHYS
V
OS
V
OS
V
BAT
= 4.5V, R
IREF
= 120kΩ, use
PPR
pin to
(1)
indicate the comparator output.
V
POR
V
POR
V
BAT
= 3.0V, R
IREF
= 120kΩ,
use
PPR
to indicate the comparator output.
3.21
2.86
3.95
3.60
4.55
4.35
V
V
110
5
60
200
mV
mV
6.10
9.35
140
245
6.80
10.50
220
340
7.26
11.15
300
430
V
mV
1
200
270
275
320
μA
μA
μA
4.152
4.152
4.2
4.2
0.7
4.248
V
4.248
Ω
Output Voltage
V
CH
PMOS On Resistance
CHARGE CURRENT
(2)
R
DS (ON)
IREF Pin Output Voltage
Constant Charge Current
Trickle Charge Current
End-of-Charge Current
EOC Rising Threshold
V
IREF
I
REF
I
TRK
I
MIN
V
BAT
= 3.8V, R
IREF
= 120kΩ
R
IREF
= 24.3kΩ, V
BAT
= 2.8V to 3.8V
R
IREF
= 24.3kΩ, V
BAT
= 2.4V
R
IREF
= 24.3kΩ
R
IREF
= 24.3kΩ
1.162
440
55
20
315
1.215
500
90
40
370
1.262
560
135
75
435
V
mA
mA
mA
mA
PRECONDITIONING CHARGE THRESHOLD
Preconditioning Charge
Threshold Voltage
Preconditioning Voltage Hysteresis
V
MIN
V
MINHYS
R
IREF
= 24.3kΩ
R
IREF
= 24.3kΩ
2.46
20
2.55
100
2.65
190
V
mV
NOTES:
1. The 4.5V V
BAT
is selected so that the
PPR
output can be used as the indication for the offset comparator output indication. If the
V
BAT
is lower than the POR threshold, no output pin can be used for indication.
2. The charge current can be affected by the thermal foldback function if the IC under the test setup cannot dissipate the heat.
SG Micro Corp
www.sg-micro.com
4
SGM4056
ELECTRICAL CHARACTERISTICS
(V
IN
= 5V, R
IMIN
= 243kΩ, T
A
= 25℃, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
High Input Voltage Charger
MIN
TYP
MAX
UNITS
℃
V
INTERNAL TEMPERATURE MONITORING
Charge Current Foldback Threshold
LOGIC INPUT AND OUTPUTS
T
FOLD
1.5
0.8
150
Pin Voltage = 1V
V
CHG
= 5.5V
Pin Voltage = 1V
V
PPR
= 5.5V
15
24
20
15
200
24
20
250
115
EN
Pin Logic Input High
EN
Pin Logic Input Low
V
kΩ
mA
μA
mA
μA
EN
Pin Internal Pull Down Resistance
CHG
Sink Current when LOW
CHG
Leakage Current when High
Impedance
PPR
Sink Current when LOW
PPR
Leakage Current when High
Impedance
SG Micro Corp
www.sg-micro.com
5
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