矽力杰SY6952B中文资料规格书pdf下载电源管理芯片

Application Note: AN_SY6952B 2A Single-Cell High Efficiency Switching Charger with Adaptive Input Current Limit Preliminary Specification General Description SY6952B is a 4.0-23V input, 2A single-cell synchronous buck Li-Ion battery charger, suitable for portable application. Select pin is convenient for different cell voltage. Integrated 800 kHz synchronous buck regulator consists of 23V rating FETs with extremely low ON resistance to achieve high charge efficiency and simple peripheral circuit design. Ordering Information SY6952 □□□□(□□□□□□□□) □□□□ Temperature Code Package Code Optional Spec Code Temperature Range: -40°C to 85°C Ordering Number Package type Note SY6952BFCC SO8E Typical Applications Features • Wide Input Voltage Range: 4.0V to 23V • High Efficiency Int. Synchronous Buck Regulator with Fixed 800kHz Switching Frequency • Trickle Current / Constant Current / Constant Voltage Charge Mode • Adaptive input current limit • Programmable Charging Timeout • 4.35 and 4.2V selectable cell voltage • Programmable (2A MAX) Constant Charge Current • • Over Temperature Protection • Output Short Circuit Protection • Charge Status Indication • Normal Synchronous Buck Operation when Battery Input Voltage UVLO and Battery OVP Removed • Compact package SO8E Applications • Cellular Telephones, • PDA, MP3 Players, MP4 Players • Digital Cameras • Bluetooth Applications • PSP Game Players, NDS Game Players • Notebook Figure1. Schematic Diagram AN_SY6952B Rev. 0.1 Silergy Corp. Confidential- Prepared for Customer Use Only 1 Pinout (top view) Top Mark: ALBxyz (device code: ALB, x=year code, y=week code, z= lot number code) (SO8E) Name Number Description AN_SY6952B TIM RS BAT NTC VSET STAT LX IN 1 2 3 4 5 6 7 8 Charge time limit pin. Connect this pin with a capacitor to ground. Internal current source charge the capacitor for TC mode and CC mode’s charge time limit. TC charge time limit is about 1/9 of CC charge time. Charge current program pin. Connect a current sense resistor from RS pin to BAT pin. Average charge current is detected for both TC mode and CC mode. Battery positive pin. Thermal protection pin. UTP threshold is about 75%VIN and OTP threshold is about 30%VIN. Pull up to VIN can disable charge logic and make the IC operate as normal buck regulator. Pull down to ground can shut down the IC. VSET is pull down internally. Open or pull down for 4.2V cell voltage, pull up for 4.35V cell voltage. Charge status indication pin. It is open drain output pin and can be used to turn on a LED to indicate the charge in process. When the charge is done, LED is off. Switch node pin. This pin connects the drains of the integrated main and synchronous power MOSFET switches. Connect to external inductor. Positive power supply input pin. VIN ranges from 4V to 23V for normal operation. It has UVLO function and must be 300mV greater than the battery voltage to enable normal operation. Ground pin. Exposed pad GND Absolute Maximum Ratings (Note 1) IN, BAT, RS, LX, ---------------------------------------------------------------------------------------------------- -0.5- 25V VSET, TIM, NTC, STAT ------------------------------------------------------------------------------------------- -0.5- 25V LX Pin current continuous ------------------------------------------------------------------------------------------------- 2A Power Dissipation, PD @ TA = 25°C, SO8E-------------------------------------------------------------------------- 3.3W Package Thermal Resistance θ JA -------------------------------------------------------------------------------------------------------------- 30°C/W θ JC ------------------------------------------------------------------------------------------------------------- 20°C/W Junction Temperature Range -------------------------------------------------------------------------------- -40°C to +125°C Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------- 260°C Storage Temperature Range ---------------------------------------------------------------------------------- -65°C to 125°C Recommended Operating Conditions IN, BAT, RS, LX, --------------------------------------------------------------------------------------------------less than 23V VSET, TIM, NTC, STAT -----------------------------------------------------------------------------------------less than 23V LX Pin current continuous -------------------------------------------------------------------------------------- less than 1.5A Junction Temperature Range ---------- ---------------------------------------------------------------------- -20°C to 100°C Ambient Temperature Range ---------------------------------------------------------------------------------- -40°C to 85°C AN_SY6952B Rev. 0.1 Silergy Corp. Confidential- Prepared for Customer Use Only 2 Electrical Characteristics TA=25°C, VIN=15V, GND=0V, CIN=10uF, LB=6.8uH, RS=25mΩ, CTIM=330nF, unless otherwise specified. AN_SY6952B Symbol Parameter Conditions Min Typ Max Unit Bias Supply (VIN) VIN Supply voltage VUVLO ∆VUVLO VOVP VIN under voltage lockout threshold VIN under voltage lockout hysteresis Input overvoltage protection Input overvoltage protection hysteresis ∆VOVP Quiescent Current IBAT IIN Oscillator and PWM fOSC D Power MOSFET RNFET RPFET Voltage Regulation Battery discharge current Input leakage current Oscillator frequency PFET duty cycle RDS(ON) of N-FET RDS(ON) of P-FET VCV ∆VRCH Low VSET for 4.2V cell voltage High VSET for 4.35V cell voltage 4.2V CV threshold for Recharge 4.35V CV threshold for Recharge TC charge mode voltage threshold VTRK Battery Connect Detection VDET tDET Charge Current Detect voltage threshold Detect delay time VIN rising and measured from VIN to GND Measured from VIN to GND VIN rising and measured from VIN to GND Measured from VIN to GND 4.0 23 Enable off Disable Charge Include bond-wire 0°C <=TA<=70°C 0°C <=TA<=70°C 0°C <=TA<=70°C VSHOT< VBAT< VRCH V V mV V mV uA mA kHz % mΩ mΩ V mV V VIN ms V mV mV/s mV/s V mV mV/s mV/s VCV V fOSC A hour hour ms ms ms VIN 190 750 800 150 160 4.20 4.35 100 150 2.5 35 4.6 50 TBD TBD 4.4 100 TBD TBD 23 3.9 25 1.5 960 100 4.24 4.40 150 200 2.8 90% 40 10% 50% 2.30 0.67 6.0 80% 32% 2.00 12.5% 3.0 0.5 4.5 30 30 30 75% 5% 30% 2% 80 640 4.16 4.30 50 100 2.2 80% 30 -10% -50% 1.70 0.23 3.0 70% 28% 105% 110% 115% Internal charge current accuracy for Constant Current Mode Internal charge current accuracy for Trickle Current Mode ICC=25mV/RS ITC=2.5mV/RS IN voltage falling threshold at high current IN voltage hysteresis at high current Slew rate of charge current decrease Slew rate of charge current increase IN voltage falling threshold at high current IN voltage hysteresis at high current Slew rate of charge current decrease Slew rate of charge current increase Input current limit slow response VINSL ∆VINSL ∆VINL/∆t Input current limit quick response ∆V ∆VINQK ∆VINL/∆t Output Voltage OVP VOVP Output Short Protection VSHOT fFBK ILM Timer TTC TCC TMC TTERM TRCHG Battery Thermal Protection NTC Output voltage OVP threshold Output short protection threshold Frequency fold back Power FET current limit Trickle current charge timeout Constant current charge timeout Charge mode change delay time Termination delay time Recharge time delay K2 K1 K3 K1 VBAT falling edge VBAT<2V/CELL CTIM=330nF UTP OTP Under temperature protection Under temperature protection hysteresis Over temperature protection Over temperature protection hysteresis Falling edge Rising edge Automatic Shutdown ∆VASD ASD voltage threshold hysteresis Measured from VIN to VBAT mV AN_SY6952B Rev. 0.1 Silergy Corp. Confidential- Prepared for Customer Use Only 3 Thermal Shutdown TSD TSDHYS Thermal shutdown temperature Thermal shutdown temperature hysteresis Rising Threshold AN_SY6952B 160 20 ºC ºC Note 1: Stresses beyond the “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Note 2: q test board of JEDEC 51-3 thermal measurement standard. Note 3: The device is not guaranteed to function outside its operating conditions JA is measured in the natural convection at TA = 25°C on a low effective four-layer thermal conductivity AN_SY6952B Rev. 0.1 Silergy Corp. Confidential- Prepared for Customer Use Only 4 Basic Li-Ion Battery Charge Operation Flow Chart AN_SY6952B AN_SY6952B Rev. 0.1 Silergy Corp. Confidential- Prepared for Customer Use Only 5