SC801_04资料
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Revision 5, November 2004
1.5 1.5 Fast - Charge Current = • 88 • 1000 Termination Current = R R 2 1
1
元器件交易网
Parameter VC C , EN to GND VOUT, VPRGM, IPRGM, C P, OVP, STAT, ITERM, BIP to GND Power D i ssi pati on, MLP (D erate 20mW/ °C above 85 °C ) VOUT short to GND Thermal Resi stance, Juncti on to Ambi ent Operati ng Juncti on Temperature IR Reflow Temperature (Solderi ng) 10 seconds Storage Temperature ESD Rati ng (Human Body Model) TR opti on TRT opti on (leadfree leadframe)
IVOUT VBAT
V C C = 0V VPRGM = Logic High VPRGM = Logic Low VPRGM = External Divider VCC = 4.2V - 6.5V
0.1 4.20 4.10 3.0 82 4.16 4.06 2.97 72 38 450 750
1 4.24 4.14 3.03 92 52 550 850
Electrical Characteristics
Unless otherwise noted: VCC = 4.75V - 5.25V
Parametions Min
25°C Typ Max Min 4.2 4.2
(-40°C to +85°C)
TA
Units Max 14 6.5 2 25 mA V V
CHARGER VIN 14 13 3 7 4 8 6 5 C1 1uF R1 R2
VCC CP VCC STAT IPRGM OVP EN VPRGM BSEN ITERM BIP VOUT GND VOUT NC NC SC801
CHARGER PRESENT
BATTERY
2.8 Pre - Charge Current = • 88 R 2
Applications
Cellular phones PDA’s and Handheld computers Handheld meters Charging stations Digital cameras
11 10 9 2 1 16 15 12 FAULT C2 2.2uF STATUS
Typical Application Circuit
µA V V
P CI ITERM FCI
ITERM Resistor R = 3.01k VBATTERY > 2.5V
45 500 800
mA
IPRGM = 3.01k IPRGM = 1.87k VBATTERY = 3.8V Dropout Voltage = 550mV
2
mA
2004 Semtech Corp.
SC801
Features
Fully integrated charger with FET pass transistor,
reverse-blocking diode, sense resistor and thermal protection 4.1V, 4.2V & Adjustable Output Voltage Programmable precharge, fastcharge & termination current Battery voltage controlled to 1% accuracy Soft-start for step load and adaptor plug-in Up to 1.5A continuous charge current Charge current monitor output from microcontroller or ADC Interface Input voltages range from 4.2V to 14V 0.1µA Battery leakage in shutdown and monitor modes Operates without a battery in regulated LDO mode Small 4mm x 4mm 16 lead MLP package °C/watt Low thermal impedance of 50° Few external components Over current protection in all charging modes Over voltage protection All outputs able to drive LED’s and interface to host processor Remote Kelvin sensing at the battery terminal Small input & output filter capacitors Status output communicates charging and end of charge cycle Now Available in Lead-Free Packaging Charges Li-Ion, Li-Polymer, NiCd and NiMH Batteries
元器件交易网
Fully Integrated High Current Lithium-Ion Battery Charger System
POWER MANAGEMENT Description
The SC801 is a fully integrated, single cell, constant-current/constant-voltage Lithium-Ion\Li-Polymer battery charger management system. The SC801 has built in intelligence and extreme functionality. When the battery voltage is below 2.8V the charger operates in a precharge mode with a charging current of up to 125mA based on the ITERM pin resistor. This pre-charge mode is set to limit power dissipation due to an undercharged battery. When the battery voltage exceeds 2.8V, the charger enters a fast charge mode. In this mode, the SC801 delivers up to 1.5A to the battery based on the IPRGM pin resistor. The part also features current termination, ending the charge cycle when the battery is charged and the charge current drops below the current programmed by the ITERM pin resistor. In addition, the charge current can be monitored by the voltage on the IPRGM pin allowing a microcontroller or ADC to access the current information to determine when to externally terminate the charge cycle. Once the charge cycle is complete and terminates, the device enters the charge monitor mode where the output voltage of the battery is monitored. If this voltage drops below the recharge threshold the device will enter the fast charge mode again, to bring the battery to its fully charged state. Both the shutdown and monitor modes drain no more than 1uA from the battery guaranteed. The output voltage to the battery is controlled to within 1% of the programmed voltage for either 4.1V or 4.2V. The SC801 can also function as a general purpose current source or as a current source for charging nickelcadmium (NiCd) and nickel-metal-hydride (NiMH) batteries using external termination.
Input Voltage Operating Voltage Operating Current
VC C VOP ICC Charging Mode OVP, STATUS, CP = 0µA LDO Mode OVP, STATUS, CP = 0µA
Battery Leakage Current Regulated Voltage Adjust Mode Feedback Voltage Battery Pre-Charge Current Battery Termination Current Battery Fast-Charge Current
Symbol
Maximum -0.3 to 14.0 -0.3 to +6.0
U nits V V W
PD
2.5 C onti nuous
θJ A TJ TIRRT TIRRT TSTG ESD
48 150 240 260 -65 to 150 2
°C /W * °C °C °C °C kV
* Tied to PCB with 1 Square Inch, 2 Ounce Copper
SC801
POWER MANAGEMENT Absolute Maximum Ratings
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied.
1.5 1.5 Fast - Charge Current = • 88 • 1000 Termination Current = R R 2 1
1
元器件交易网
Parameter VC C , EN to GND VOUT, VPRGM, IPRGM, C P, OVP, STAT, ITERM, BIP to GND Power D i ssi pati on, MLP (D erate 20mW/ °C above 85 °C ) VOUT short to GND Thermal Resi stance, Juncti on to Ambi ent Operati ng Juncti on Temperature IR Reflow Temperature (Solderi ng) 10 seconds Storage Temperature ESD Rati ng (Human Body Model) TR opti on TRT opti on (leadfree leadframe)
IVOUT VBAT
V C C = 0V VPRGM = Logic High VPRGM = Logic Low VPRGM = External Divider VCC = 4.2V - 6.5V
0.1 4.20 4.10 3.0 82 4.16 4.06 2.97 72 38 450 750
1 4.24 4.14 3.03 92 52 550 850
Electrical Characteristics
Unless otherwise noted: VCC = 4.75V - 5.25V
Parametions Min
25°C Typ Max Min 4.2 4.2
(-40°C to +85°C)
TA
Units Max 14 6.5 2 25 mA V V
CHARGER VIN 14 13 3 7 4 8 6 5 C1 1uF R1 R2
VCC CP VCC STAT IPRGM OVP EN VPRGM BSEN ITERM BIP VOUT GND VOUT NC NC SC801
CHARGER PRESENT
BATTERY
2.8 Pre - Charge Current = • 88 R 2
Applications
Cellular phones PDA’s and Handheld computers Handheld meters Charging stations Digital cameras
11 10 9 2 1 16 15 12 FAULT C2 2.2uF STATUS
Typical Application Circuit
µA V V
P CI ITERM FCI
ITERM Resistor R = 3.01k VBATTERY > 2.5V
45 500 800
mA
IPRGM = 3.01k IPRGM = 1.87k VBATTERY = 3.8V Dropout Voltage = 550mV
2
mA
2004 Semtech Corp.
SC801
Features
Fully integrated charger with FET pass transistor,
reverse-blocking diode, sense resistor and thermal protection 4.1V, 4.2V & Adjustable Output Voltage Programmable precharge, fastcharge & termination current Battery voltage controlled to 1% accuracy Soft-start for step load and adaptor plug-in Up to 1.5A continuous charge current Charge current monitor output from microcontroller or ADC Interface Input voltages range from 4.2V to 14V 0.1µA Battery leakage in shutdown and monitor modes Operates without a battery in regulated LDO mode Small 4mm x 4mm 16 lead MLP package °C/watt Low thermal impedance of 50° Few external components Over current protection in all charging modes Over voltage protection All outputs able to drive LED’s and interface to host processor Remote Kelvin sensing at the battery terminal Small input & output filter capacitors Status output communicates charging and end of charge cycle Now Available in Lead-Free Packaging Charges Li-Ion, Li-Polymer, NiCd and NiMH Batteries
元器件交易网
Fully Integrated High Current Lithium-Ion Battery Charger System
POWER MANAGEMENT Description
The SC801 is a fully integrated, single cell, constant-current/constant-voltage Lithium-Ion\Li-Polymer battery charger management system. The SC801 has built in intelligence and extreme functionality. When the battery voltage is below 2.8V the charger operates in a precharge mode with a charging current of up to 125mA based on the ITERM pin resistor. This pre-charge mode is set to limit power dissipation due to an undercharged battery. When the battery voltage exceeds 2.8V, the charger enters a fast charge mode. In this mode, the SC801 delivers up to 1.5A to the battery based on the IPRGM pin resistor. The part also features current termination, ending the charge cycle when the battery is charged and the charge current drops below the current programmed by the ITERM pin resistor. In addition, the charge current can be monitored by the voltage on the IPRGM pin allowing a microcontroller or ADC to access the current information to determine when to externally terminate the charge cycle. Once the charge cycle is complete and terminates, the device enters the charge monitor mode where the output voltage of the battery is monitored. If this voltage drops below the recharge threshold the device will enter the fast charge mode again, to bring the battery to its fully charged state. Both the shutdown and monitor modes drain no more than 1uA from the battery guaranteed. The output voltage to the battery is controlled to within 1% of the programmed voltage for either 4.1V or 4.2V. The SC801 can also function as a general purpose current source or as a current source for charging nickelcadmium (NiCd) and nickel-metal-hydride (NiMH) batteries using external termination.
Input Voltage Operating Voltage Operating Current
VC C VOP ICC Charging Mode OVP, STATUS, CP = 0µA LDO Mode OVP, STATUS, CP = 0µA
Battery Leakage Current Regulated Voltage Adjust Mode Feedback Voltage Battery Pre-Charge Current Battery Termination Current Battery Fast-Charge Current
Symbol
Maximum -0.3 to 14.0 -0.3 to +6.0
U nits V V W
PD
2.5 C onti nuous
θJ A TJ TIRRT TIRRT TSTG ESD
48 150 240 260 -65 to 150 2
°C /W * °C °C °C °C kV
* Tied to PCB with 1 Square Inch, 2 Ounce Copper
SC801
POWER MANAGEMENT Absolute Maximum Ratings
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied.