SI9731DQ-T1 Vishay, SI9731DQ-T1 Datasheet
SI9731DQ-T1
Specifications of SI9731DQ-T1
Available stocks
Related parts for SI9731DQ-T1
SI9731DQ-T1 Summary of contents
Page 1
... TSSOP-16 package (1.2 mm maximum height) • Halogen-free according to IEC 61249-2-21 definition • Compliant to RoHS directive 2002/95/EC APPLICATIONS • Cellular phone battery charger • Personal digital assistants Fast Charge Trickle Charge Charge Control Si9731 Vishay Siliconix V BAT 4.1/4.2 V_TAP www.vishay.com 1 ...
Page 2
... Si9731 Vishay Siliconix ABSOLUTE MAXIMUM RATINGS Parameter Voltages Referenced to GND = CHARGER, (CVMODE) (TRICKLECHARGEEN (4.1 V_TAP) (VBAT+) (CHARGERPOWER_ON) V (TRICKLE_VBAT (CHARGERPRESENTIN) (CHARGERPOWER_ONIN) Maximum Input Current (I ) CHARGER(max) Maximum Sink Current CHARGERPOWER_ON and CHARGERPRESENT Pins Storage Temperature Operating Junction Temperature a Power Dissipation (Package) Thermal Impedance (Θ ...
Page 3
... Q2 R DS(on DS(on) V Rising Edge of Battery Charger CHARGER(OVD) V CHARGER(OVD) _HYS 6 P/D T S/D T HYST V ON/OFF(high) V ON/OFF(low) V ON/OFF(hyst) Si9731 Vishay Siliconix < ° 1.5 V Min. Typ. Max. ON/OFF ≤ 600 4 0.1 1 ON/OFF 0.1 2 CHARGER 400 ≥ 1 ≤ 0.4 V CVMODE ≥ 1 12.0 12.8 13 ...
Page 4
... BAT+ 15 CHARGERPOWER_ON 16 CHARGERPRESENT www.vishay.com 4 TSSOP-16 CHARGERPRESENT = (XCHARGERPRESENT CHARGERPOWER_ON = (XCHARGERPOWER_ON BAT+ TRICKLE_V 4 13 Si9731DQ 4.1 V_TAP 5 12 GND 6 11 (N/ REF Top View Temperature Range - °C Temperature Range - °C Logic input for CHARGERPRESENT output External charger Master shutdown pin. Taking ON/OFF low shuts down the charger and quiescent current drops to under 1 µ ...
Page 5
... HIGH ON > mV, CHARGER BAT > CHARGER BAT Output of Error Amplifier LOW Intermediate LOW HIGH Si9731 Vishay Siliconix b Q2 Mode OFF Not Charging OFF Not Charging OFF Not Charging OFF Not Charging (Shutdown) ON Trickle Charge Not Charging OFF (Current pulse off during Constant ...
Page 6
... Si9731 Vishay Siliconix TYPICAL CHARACTERISTICS 25 °C, unless otherwise noted 4.22 4.1 TAP Open 4.20 4.18 4.16 4.14 4.12 4.1 TAP to V 4.10 4. CHARGER V (CV Mode) vs. V BAT 2.75 2.70 2.65 2.60 2.55 2.50 2. Temperature (°C) Charger UVLO Rising vs. Temperature www.vishay.com 6 BAT ...
Page 7
... OK to Charge – (OTC – Q2 Trickle Charge Q1 Digital + Temp Analog OK 2.6 V E/A Temp Voltage 3.4 V Sensor Generator 5 V 12.8 V N/C Figure 1. Si9731 Vishay Siliconix 16 CHARGERPRESENT Q3 15 CHARGERPOWER_ON Q4 – 3 BAT – C OUT 2.2 μfd Battery Over Voltage 56 Ω 13 Trickle_V BAT Fast RFB1 ...
Page 8
... Si9731 Vishay Siliconix DETAIL OPERATIONAL DESCRIPTION Si9731 is a chemistry independent battery charger designed for use with a system processor. For example, Si9731 can be integrated within a cellular phone whereby the fast charge and trickle (slow) charge modes can be software controlled by the DSP. The device is designed to charge 1-cell Li-ion or 1-cell to 3-cell NiCd/NiMH batteries ...
Page 9
... Si9731’s internal over voltage detector will turn off MOSFETs Q1, Q2, and Q5 and disable charging. Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and reliability data, see www ...
Page 10
... Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications their own risk and agree to fully indemnify and hold Vishay and its distributors harmless from and against any and all claims, liabilities, expenses and damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay or its distributor was negligent regarding the design or manufacture of the part ...