SD6003

SD6003 SHOUDING | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 7

Technical content

The SD6003 converters are available in the Furthermore, the SD6003 is specifically SD6003 ideally suited for portable applications. The SD6003 automatically terminates the The SD6003 is a complete SD6003 FFeeaattuurreess /head2right Programmable Charge Current Up to 500mA /head2right No MOSFET, Sense Resistor or Blocking Diode Required /head2right Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate /head2right Without Risk of Overheating /head2right Charges Single Cell Li-Ion Batteries Directly from USB Port /head2right Preset 4.2V Charge Voltage with 1%  Accuracy /head2right Automatic Recharge /head2right 2.9V Trickle Charge Threshold /head2right Available in 6-Lead SOT-23 Package AA pppplliiccaattiioonnss /head2right Charger for Li-Ion Coin Cell Batteries /head2right Portable MP3 Players, Wireless Headsets /head2right Bluetooth Applications /head2right Multifunction Wristwatches DD eessccrriippttiioonn constant-current/constant voltage linear charger for single cell lithium-ion batteries. Its package and low external component count make the designed to work within USB power specifications. No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture. The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor. charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. industry standard SOT-23-6L power packages (or upon request). SS ttaannddaalloonnee LLiinneeaarr LLii--LLoonn BB aatttteerryy CC hhaarrggeerr ww iitthh TThheerrmm aall RR eegguullaattiioonn Shouding http://www.sdw-tw.com

TTyyppiiccaall AA pppplliiccaattiioonn * IBAT = (VPROG /RSET )*900 * When charging in constant-current mode, the VPROG is usually 1V. PP iinn AA ssssiiggnnmm eenntt TOP VIEW SOT-23- 6L PIN NUMBER SOT-23- 6L PIN NAME FUNCTION

1 CHRG

2 GND Ground

3 BAT Charge Current Output

4 VCC

Voltage. 5 LD Open-Drain Charge Status Output

6 PROG Charge Current Program

http://www.sdw-tw.com

The SD6003 is guaranteed to meet performance specif PP iinn DD eessccrriippttiioonn CHRG (Pin 1): Open-Drain Charge Status Output. When the battery is charging, the CHRG pin is pulled low by an internal N-channel MOSFET. When the charge cycle is completed, high impedance is forced to the CHRG pin and LD (pin 5) is pulled low, indicating an “AC present” condition. GND (Pin 2): Ground. BAT (Pin 3): Charge Current Output. It should be bypassed with at least a 1uF capacitor. It Provides charge current to the battery and regulates the final float voltage to 4.2V. An internal precision resistor divider from this pin sets the float voltage which is disconnected in shutdown mode. VCC (Pin 4): Positive Input Supply Voltage. It Provides power to the charger VCC can range from 4.5V LD (Pin 5): Open-Drain Charge Status Output. See CHRG pin (Pin 1). PROG (Pin 6): Charge Current Program, Charge Current Monitor and Shutdown Pin. The charge current is programmed by connecting a 1% resistor, RPROG , to ground. When charging in constant-current mode, this pin servos to 1V. In all modes, the voltage on this pin can be used to measure the charge current using the following formula: IBAT = (VPROG /RSET )*900. AA bbssoolluuttee MM aaxxiimm uumm RR aattiinnggss ((NN oottee 11)) Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. Note 2: ications from 0° C to 70° C. Specifications over the –40° C to 85° C operating temperature range are assured by design, characterization and correlation with statistical process controls. to 6V and should be bypassed with at least a 10uf capacitor. SD6003 Shouding http://www.sdw-tw.com

EE lleeccttrriiccaall CC hhaarraacctteerriissttiiccss Operating Conditions: TA=25 , ℃ VCC =5V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VCC Input Supply Voltage Standby Mode (Charge Terminated) l µ A ICC Input Supply Current Shutdown Mode (RPROG Not Connected, VCC < VBAT ) µ A VFLOAT Regulated Output (Float) Voltage 0℃≤ TA≤ /uniF02085℃ , IBAT = 50mA 4.15 4.2 4.24 V R PROG = 10k, Current Mode 90 mA R PROG = 2k, Current Mode 450 mA Standby Mode, VBAT = 4.2V 7 µ A Shutdown Mode (RPROG Not Connected) µ A IBAT BAT Pin Current Sleep Mode, VCC = 0V 0.1 µ A ITRIKL Trickle Charge Current VBAT < VTRIKL, RPROG = 2k 45 mA VTRIKL Trickle Charge Threshold Voltage R PROG = 10k, VBAT Rising 2.9 V ITERM C/10 Termination Current Threshold R PROG = 2k 45 mA VPROG PROG Pin Voltage R PROG = 2k, Current Mode 1 V ΔVRECHRG Recharge Battery Threshold Voltage VFLOAT - VRECHRG 250 mV R ON Power FET “ON” Resistance (Between VCC and BAT) 660 m Ω 4.75 5 6 V SD6003 Shouding http://www.sdw-tw.com

ed value, the SD6003 terminates the charge C. This feature protects the SD6003 from circuit board without risk of damaging the SD6003. Th The SD6003 constantly monitors the BAT pin voltage in voltage (4.2V), the SD6003 enters In this mode, the SD6003 supplies approximately 1/10 th s. Furthermore, the SD6003 is capable of The SD6003 is a single cell lithium-ion battery charger 1%. The SD6003 includes an internal P-channel power M AA pppplliiccaattiioonn IInnffoorrmm aattiioonn using a constant-current/constant-voltage algorithm. It can deliver up to 800mA of charge current (using a good thermal PCB layout) with a final float voltage accuracy of ± OSFET and thermal regulation circuitry. No blocking diode or external current sense resistor is required; thus, the basic charger circuit requires only two external component operating from a USB power source. Normal Charge Cycle A charge cycle begins when the voltage at the VCC pin rises above 4.5V and a 1% program resistor is connected from the PROG pin to ground or when a battery is connected to the charger output. If the BAT pin is less than 2.9V, the charger enters trickle charge mode. e programmed charge current to bring the battery voltage up to a safe level for full current charging. When the BAT pin voltage rises above 2.9V, the charger enters constant-current mode, where the programmed charge current is supplied to the battery. When the BAT pin approaches the final float constant-voltage mode and the charge current begins to decrease. When the charge current drops to 1/10 of the programmed value, the charge cycle ends. Charge Termination A charge cycle is terminated when the charge current falls to 1/10th the programmed value after the final float voltage is reached. This condition is detected by using an internal, filtered comparator to monitor the PROG pin. When charging, transient loads on the BAT pin can cause the PROG pin to fall below 100mV for short periods of time before the DC charge current has dropped to 1/10th the programmed value. Once the average charge current drops below 1/10th the programm cycle and ceases to provide any current through the BAT pin. In this state, all loads on the BAT pin must be supplied by the battery. standby mode. If this voltage drops below the 4V recharge threshold (VRECHRG ), another charge cycle begins and current is once again supplied to the battery. To manually restart a charge cycle when in standby mode, the input voltage must be removed and reapplied, or the charger must be shut down and restarted using the PROG pin. Thermal Limiting An internal thermal feedback loop reduces the programmed charge current if the die temperature attempts to rise above a preset value of approximately 120° excessive temperature and allows the user to push the limits of the power handling capability of a given e charge current can be set according to typical (not worst-case) ambient temperature with the assurance that the charger will automatically reduce the current in worst-case conditions. ThinSOT power considerations are discussed further in the Applications Information section. SD6003 Shouding http://www.sdw-tw.com

A charge cycle restarts when the battery voltage falls below 4V (which corresponds to approximately 80% to 90% battery capacity). This ensures that the battery is kept at or near a fully charged condition and eliminates the need for periodic charge cycle initiations. CHRG output enters a strong pull down state during recharge cycles. VCC Bypass Capacitor Many types of capacitors can be used for input bypassing, however, caution must be exercised when using multilayer ceramic capacitors. Because of the self-resonant and high Q characteristics of some types of ceramic capacitors, high voltage transients can be generated under some start-up conditions, such as connecting the charger input to a live power source. Adding a 1.5W resistor in series with an X5R ceramic capacitor will minimize start-up voltage transients. SD6003 Shouding http://www.sdw-tw.com

PP aacckkaaggiinngg IInnffoorrmm aattiioonn Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max A 1.050 1.250 0.041 0.049 A1 0.000 0.100 0.000 0.004 A2 1.050 1.150 0.041 0.045 b 0.300 0.500 0.012 0.020 c 0.100 0.200 0.004 0.008 D 2.820 3.020 0.111 0.119 E 1.500 1.700 0.059 0.067 E1 2.650 2.950 0.104 0.116 e 0.950(BSC) 0.037(BSC) e1 1.800 2.000 0.071 0.079 L 0.300 0.600 0.012 0.024 SD6003 Shouding http://www.sdw-tw.com