Adapter/USB Tri-Mode Single-cell Li-ion Charger
POWER MANAGEMENTFeatures
Description
The SC811 and SC813 are highly versatile single input triple mode (adapter/USB high current, USB low current) linear single-cell Li-ion battery chargers, each in an 8 lead 2x2 MLPD ultra-thin package. The input will survive sus-tained input voltage up to 30V to protect against hot plug overshoot and faulty charging adapters. The SC811 has 9.6V rising, 8.2V falling OVP thresholds for general purpose charging with low cost adaptors. The SC813 has 6V rising, 5.6V falling OVP thresholds for customers utilizing charg-ing adapters with specifi cations that are similar to a USB Vbus supply. The SC811 and SC813 differ only in OVP threshold.
Charging begins automatically when an input source is applied to the charging input. Thermal limiting protects against excessive power dissipation. The charger can be programmed to turn off when charging is complete or to continue operating as an LDO regulator while fl oat-charg-ing the battery.
Three charging modes are provided: adapter mode, USB low power mode, and USB high power mode. Battery-capacity-dependent and charging source-dependent current programming are independently programmed. Adapter and USB high power modes can charge up to 1A, with the charging adapter operating either in voltage regulation or in current limit to obtain the lowest possible power dissipation. A single current programming pin is used to program pre-charge, termination, and adapter-mode fast-charge currents in fixed proportions. In the USB modes, a second programming pin is used to program low power pre-charge current and low and high power fast-charge currents. This confi guration allows indepen-dent programming of termination current. The two USB modes dynamically limit the charging load if necessary to prevent overloading the USB Vbus supply.
Single input charger with three charging modesConstant voltage — 4.2V, 1% regulation
Fast-charge current regulation — 15% at 70mA, 9% at 700mA
Charging by current regulation, voltage regulation, and thermal limiting
Input voltage protection — 30V
Current-limited adapter support capability — reduces power dissipation in charger IC
USB high and low power modes limit charge current to prevent USB Vbus overload
Instantaneous CC-to-CV transition for faster chargingProgrammable battery-dependent currents (adapter mode fast- and pre-charge, termination)
Programmable source-limited currents (USB-high mode fast-charge, and USB-low mode fast- and pre-charge)
Independent programming of termination current with dual-mode operationThree termination options — fl oat-charge, automatic re-charge, or forced re-charge to keep the battery topped-off after termination without fl oat-chargingSoft-start reduces adapter or USB load transientsHigh operating voltage range of SC811 permits use of unregulated adapters
Complies with CCSA YD/T 1591-2006
Space saving 2x2x0.6 (mm) MLPD packageWEEE and RoHS compliant
Applications
Mobile phonesMP3 players
GPS handheld receivers
Typical Application Circuit
VADAPTERMODE SELECT2.2 μFVINMODESTATBGNDSC811 / SC813ENBBATIPRGMIPUSB2.2 μFBattery Pack Device Load April 7, 2008
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© 2008 Semtech Corporation1
SC811 / SC813
Pin Confi guration
Ordering Information
Device
SC811ULTRT(1)(2)SC813ULTRT(1)(2)
VIN1TOP VIEWMODE27BAT8ENBPackage
MLPD-UT-8 2×2MLPD-UT-8 2×2Evaluation BoardEvaluation Board
SC811EVBSC813EVB
STATB3T6IPRGMNotes:
(1) Available in tape and reel only. A reel contains 3,000 devices.(2) Lead-free package only. Device is WEEE and RoHS compliant.
GND45IPUSBMLPD-UT8; 2x2, 8 LEADθJA = 68°C/WMarking Information
81xywx = 1 or 3yw = Date Codehttp://oneic.com/
© 2008 Semtech Corporation2
SC811 / SC813
Absolute Maximum Ratings
VIN (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +30.0BAT, IPRGM, IPUSB (V) . . . . . . . . . . . . . . . . . . . . . . . . .-0.3 to +6.5STATB, ENB, MODE (V) . . . . . . . . . . . . . . . . . . .-0.3 to VBAT + 0.3VIN Input Current (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5Total Power Dissipation (W) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2BAT, IPRGM, IPUSB Short to GND Duration . . . . Continuous ESD Protection Level(1) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Recommended Operating Conditions
Operating Ambient Temperature (°C) . . . . . . . . . -40 to +85SC811:
VIN Adapter Mode Operating Voltage(2) (V) . . . 4.60 to 8.20VIN USB Modes Operating Voltage(2) (V) . . . . . . 4.35 to 8.20SC813:
VIN Adapter Mode Operating Voltage(2) (V) . . . 4.60 to 5.60VIN USB Modes Operating Voltage(2) (V) . . . . . . 4.35 to 5.60
Thermal Information
Thermal Resistance, Junction to Ambient(3) (°C/W) . . . . . 68Junction Temperature Range (°C) . . . . . . . . . . . . . . . . . . +150Storage Temperature Range (°C) . . . . . . . . . . . . -65 to +150Peak IR Reflow Temperature (°C) . . . . . . . . . . . . . . . . . . . +260
Exceeding the above specifi cations may result in permanent damage to the device or device malfunction. Operation outside of the parameters specifi ed in the Electrical Characteristics section is not recommended.NOTES:
(1) Tested according to JEDEC standard JESD22-A114-B.
(2) This is the input voltage at which the charger is guaranteed to begin operation. Maximum operating voltage is the maximum Vsupply as
defined in EIA/JEDEC Standard No. 78, paragraph 2.11.
(3) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
Electrical Characteristics
Test Conditions: VVIN = 4.75V to 5.25V; VBAT = 3.7V; Typ values at 25°C; Min and Max at -40°C < TA < 85°C, unless specifi ed.
Parameter
VIN Adapter Mode Rising ThresholdVIN Adapter Mode Falling Threshold (1)VIN USB Modes Rising ThresholdVIN USB Modes Falling ThresholdVIN USB Modes Hysteresis
Symbol
VTADUVLO-RVTADUVLO-FVTUSBUVLO-RVTUSBUVLO-FVTUSBUVLO-HVTOVP-R
ConditionsMin
4.30
Typ
4.452.854.20
Max
4.603.004.35
Units
VVVVmV
VVIN > VBATVVIN > VBATVVIN > VBAT
VTUSBUVLOR - VTUSBUVLOFAll modes, SC811
2.70
3.65100
4.00
9.05.85
8.25.65050
8.8
9.6
V
6.0
VIN OVP Rising Threshold
All modes, SC813All modes, SC811
VIN OVP Falling Threshold
VTOVP-F
V
All modes, SC813
VTOVP-R - VTOVP-F , all modes, SC811VTOVP-R - VTOVP-F , all modes, SC813
5.75200
mV
100
VIN OVP Hysteresis
VTOVP-H
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© 2008 Semtech Corporation3
SC811 / SC813
Electrical Characteristics (continued)
Parameter
VIN Charging Disabled Quiescent Current
VIN Charging Enabled Quiescent Current
CV Regulation VoltageCV Voltage Load RegulationRe-charge ThresholdPre-charge Threshold (rising)
Symbol
IqVIN_DISIqVIN_ENVCVVCV_LOADVTReQVTPreQlBAT_V0
Conditions
VENB = VBAT
VENB = 0V,
excluding IBAT, IIPRGM, and IIPUSBIBAT = 50mA, -40°C ≤ TJ ≤ 125°C
Relative to VCV @ 50mA, 1mA ≤ IBAT ≤ 1A, -40°C ≤ TJ ≤ 125°C
VCV - VBAT
MinTyp
22
Max
334.2410
Units
mAmAVmVmVVμAμAμAkΩmAmAmAkΩmAmAVVVVVV
4.16-20602.85
4.20
1002.900.10.10.1
1402.9511129.4
VBAT = VCV, VVIN = 0VVBAT = VCV, VVIN = 5V, VENB = 2V
VBAT = VCV, VVIN = 5V; ENB not connected
2.05
RIPRGM = 2.94kΩ, VTPreQ < VBAT < VCVRIPRGM = 2.94kΩ, 1.8V < VBAT < VTPreQ
RIPRGM = 2.94kΩ, VBAT = VCV
643105592.05
RIPUSB = 4.42kΩ, 1.8V < VBAT < VTPreQRIPUSB = 4.42kΩ, 1.8V < VBAT < VCVIBAT = 700mA, 0°C ≤ TJ ≤ 125°CVVIN = 5.0V, VTPreQ < VBAT < VCV
1.8V < VBAT < VTPreQVBAT = VCV
(either input selected)VVIN = 0V, VTPreQ < VBAT < VCV
VVIN = 0V, VBAT < VTPreQ
5mA ≤ VIN supply current limit ≤
500mA, VMODE = 2V, RIPUSB = 3.65kΩ (559mA)
4.4542769
Battery Leakage Current
lBAT_DISlBAT_MON
IPRGM Programming ResistorFast-Charge Current, Adapter Mode Pre-Charge Current, Adapter Mode and USB High Power ModeTermination Current, Any ModeIPUSB Programming ResistorFast-Charge Current, USB High Power Mode
Pre-Charge Current and Fast-Charge Current, USB Low Power ModeDropout Voltage
IPRGM Fast-charge Regulated VoltageIPRGM Pre-charge Regulated VoltageIPRGM Termination Threshold VoltageIPUSB Fast-charge Regulated VoltageIPUSB Pre-charge or USB Low Power Mode Regulated Voltage
VIN USB Modes Under-Voltage Load Regulation Limiting Voltage
RIPRGMIFQ_ADIPreQ_ADITERMRIPUSBIFQ_USBIPreQ_USBVDOVIPRGM_FQVIPRGM_PQVTIPRGM_TERMVIPUSB_FQVIPUSB_PQVUVLR
69413969
7451738029.4
462920.402.040.4080.2042.040.408
4971160.60
4.584.70V
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© 2008 Semtech Corporation4
SC811 / SC813
Electrical Characteristics (continued)
Parameter
Thermal Limiting Threshold TemperatureThermal Limiting Rate
ENB or MODE Input High Voltage Threshold
ENB or MODE Input Mid Voltage RangeENB or MODE Input Low Voltage Threshold
ENB Input High-range Threshold Input Current
ENB Input High-range Sustain Input Current
MODE Input High-range Input CurrentENB or MODE Input Mid-range Load Limit
ENB or MODE Input Low-range Input Current
MODE Input Monitor State Input Current
ENB or MODE Input LeakageSTATB Output Low VoltageSTATB Output High Current
Symbol
TTLiTVIHVIMVILIENB_IH_THIENB_IH_SUSIMODE_IHIIMIILIMODE_MONIILEAKVSTAT_LOISTAT_HI
ConditionsMinTyp
13050
MaxUnits
°CmA/ °CV
1.60.7
1.30.3
ENB current required to pull ENB from floating midrange into high rangeCurrent required to hold ENB in high range, Min VIH ≤ VENB ≤ VBAT,
Min VIH ≤ VBAT ≤ 4.2V
VMODE = Min VIH
Input will float to mid range when this
load limit is observed.
0V ≤ (VENB or VMODE) ≤ Max VILVMODE = VBAT = 4.2V,
VENB = 1V and Charging Terminated
VVIN = 0V or VVIN = 5V, VENB and VMODE = VBAT = 4.2V
ISTAT_SINK = 2mAVSTAT = 5V
-5-25
12
110.51
23
50
VVμA
0.323
1755
μAμAμAμAμAμAVμA
Notes:
(1) Sustained operation to VTADUVLO-F ≤ VVIN is guaranteed only if a current limited charging source applied to VIN is pulled below VTADUVLO-R by the
charging load; forced VIN voltage below VTADUVLO-R may in some cases result in regulation errors or other unexpected behavior.
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© 2008 Semtech Corporation5
SC811 / SC813
Typical Characteristics
CV Line Regulation
TA = 25C, IBAT = 50mA4.204οοCV Load Regulation
TA = 25C, VVIN = 5V4.2044.24.24.1964.196VBAT (V)VBAT (V)4.1924.1924.1884.1884.1844.1844.1855.566.577.584.180100200300400500600700800VVIN (V)IBAT (mA)CV Temperature Regulation
VVIN = 5V, IBAT = 50mA4.2047204.2680640CC AD or USB High FQ Line Regulation
TA = 25C, VBAT = 3.7VοRIPRGM or RIPUSB = 2.94kΩ4.196IBAT (mA)VBAT (V)4.1926005605204.1884.1844804404.5RIPRGM or RIPUSB = 4.42kΩ4.18-40-200204060o8010012055.566.577.58Ambient Temperature (C)VVIN (V)CC AD or USB High FQ VBAT Regulation
TA = 25C, VVIN = 5V720680640οCC AD or USB High FQ Temperature Regulation
VVIN = 5V, VBAT = 3.7V720680640RIPRGM or RIPUSB = 2.94kΩRIPRGM or RIPUSB = 2.94kΩIBAT (mA)6005605204804402.9RIPRGM or RIPUSB = 4.42kΩIBAT (mA)600560520480440RIPRGM or RIPUSB = 4.42kΩ3.13.33.53.73.94.1-40-200204060o80100120VBAT (V)Ambient Temperature (C)http://oneic.com/
© 2008 Semtech Corporation6
SC811 / SC813
Typical Characteristics
CC PQ Line Regulation
TA = 25C, VBAT = 2.6V160150140οCC PQ Temperature Regulation
VVIN = 5V, VBAT = 2.6V160150140RIPRGM or RIPUSB = 2.94kΩRIPRGM or RIPUSB = 2.94kΩIBAT (mA)IBAT (mA)1301201101009013012011010090RIPRGM or RIPUSB = 4.42kΩRIPRGM or RIPUSB = 4.42kΩ55.566.577.58-40-200204060o80100120VVIN (V)Ambient Temperature (C)CC USB Low Power FQ Line Regulation
TA = 25C, VBAT = 3.7V160150140160150140οCC USB Low Power FQ VBAT Regulation
TA = 25C, VVIN = 5VοRIPUSB = 2.94kΩRIPUSB = 2.94kΩIBAT (mA)IBAT (mA)130120110100904.5130120110100902.9RIPUSB = 4.42kΩRIPUSB = 4.42kΩ55.566.577.583.13.33.53.73.94.1VVIN (V)VBAT (V)CC USB Low Power FQ Temperature Regulation
VVIN = 5V, VBAT = 3.7V160150140RIPUSB = 2.94kΩIBAT (mA)13012011010090RIPUSB = 4.42kΩ-40-200204060o80100120Ambient Temperature (C)http://oneic.com/
© 2008 Semtech Corporation7
SC811 / SC813
Typical Characteristics
IFQ_AD vs. RIPRGM , or IFQ_USB High Power vs. RIPUSB
VVIN = 5V, VBAT = 3.7V, TA = 25C1000200οIPQ_AD or IPQ_USB vs. RIPRGM, or IFQ_USB Low Power vs. RIPUSBVVIN = 5V, VBAT = 2.6V, TA = 25Cο800160IBAT (mA)IBAT (mA)6001204008020040026101418222630026101418222630RIPRGM or RIPUSB (kΩ)RIPRGM or RIPUSB (kΩ)Charging Cycle Battery Voltage and Current
850mAhr battery, RIPRGM = 2.94kΩ, VVIN = 5.0V, TA = 25CοPre-Charging Battery Voltage and Current
850mAhr battery, RIPRGM = 2.94kΩ, VVIN = 5.0V, TA = 25C4800700IBAT600500400VBAT2.752.52.2520300200100020οVBAT (V), Internal Power Dissipation (W)765VBAT432100IBAT7003.756003.55003.25IBAT (mA)40030020010002.2530.250.50.7511.251.51.75224681012141618Time (hrs)Time (s)CC-to-CV Battery Voltage and Current
850mAhr battery, RIPRGM = 2.94kΩ, VVIN = 5.0V, TA = 25C4.21IBAT710οRe-Charge Cycle Battery Voltage and Current
850mAhr battery, RIPRGM = 2.94kΩ, VVIN = 5.0V, Load = 10mA4.5450VBAT400350300250200150IBAT10050Discharge hours 2 - 6 omitted.0.5 1.0 1.5 2/6 6.5 7.0 0 7.5VBAT (V), Internal Power Dissipation (W)43.532.521.510.50 0.0 4.2690IBAT (mA)4.18VBAT4.176506304.164444.54545.54646.54747.561048Time (min)Time (hrs)http://oneic.com/
© 2008 Semtech Corporation
IBAT (mA)VBAT (V)4.19670IBAT (mA)VBAT (V)8
SC811 / SC813
Typical Characteristics
Mode Reselection — USB Low to USB High
VVIN=5V, VBAT=3.7V
Mode Reselection — USB High to USB Low
VVIN=5V, VBAT=3.7V
IBAT (100mA/div))VMODE (2V/div)
VMODE (2V/div)VMODE=0V—IBAT (100mA/div)
IBAT=0mA—
IBAT=0mA—VMODE=0V—
100μs/div100μs/div
Mode Reselection — AD to USB High
VVIN=5V, VBAT=3.7V
IBAT (100mA/div)
Mode Reselection — USB High to AD
VVIN=5V, VBAT=3.7V
IBAT (100mA/div)VMODE (2V/div)
VMODE (2V/div)VMODE=0V—
VMODE=0V—
IBAT=0mA—
100μs/div
IBAT=0mA—
100μs/div
Mode Reselection — AD to USB Low
VVIN=5V, VBAT=3.7V
IBAT (100mA/div)
Mode Reselection — USB Low to AD
VVIN=5V, VBAT=3.7V
VMODE (2V/div)VMODE=0V—
VMODE (2V/div)VMODE=0V—IBAT (100mA/div)
IBAT=0mA—
100μs/div
IBAT=0mA—
100μs/div
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© 2008 Semtech Corporation9
SC811 / SC813
Pin Descriptions
Pin #
12
Pin Name
VINMODE
Pin Function
Supply pin — connect to charging adapter (wall adapter or USB). This pin is protected against damage due to high voltage up to 30V.
Charging mode selection (tri-level logical) input — Logical high selects USB high power mode, fl oating selects USB low power mode, ground selects adapter mode.
Status output pin — This open-drain pin is asserted (pulled low) when a valid charging supply is connected to the VIN pin, and a charging cycle begins. It is released when the termination current is reached, indicating that charging is complete. STATB is not asserted for re-charge cycles.Ground
Fast-charge and pre-charge current programming pin for a USB mode charging source — USB high power mode (100%) and low power mode (20%) fast-charge current are programmed by connecting a resistor from this pin to ground. USB low power mode pre-charge current is equal to the low power mode fast-charge current (20% of USB high power mode fast-charge current).
Adapter mode fast-charge, adapter and USB high power modes pre-charge, and all modes termination current programming pin — Connect a resistor from this pin to ground. Pre-charge current is 20% of IPRGM-programmed adapter mode fast-charge current when in adapter mode or USB high power mode. The charging termination current threshold (for adapter or either USB mode selection) is 10% of the IPRGM programmed fast-charge current. Charger output — connect to battery positive terminal.
Combined device enable/disable — Logic high disables the device. Tie to GND to enable charging with indefi nite fl oat-charging. Float this pin to enable charging without fl oat-charge upon termination. Note that this pin must be grounded if the SC811/3 is to be operated without a battery connected to BAT.
Pad is for heatsinking purposes — not connected internally. Connect exposed pad to ground plane using multiple vias.
3STATB
4GND
5IPUSB
6 IPRGM
7BAT
8ENB
TThermal Pad
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© 2008 Semtech Corporation10
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SEMTECHSC811ULTRT
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