SI9731DQ-T1 Vishay, SI9731DQ-T1 Datasheet

IC, BATTERY CHARGER, TSSOP-16

SI9731DQ-T1

Manufacturer Part Number
SI9731DQ-T1
Description
IC, BATTERY CHARGER, TSSOP-16
Manufacturer
Vishay
Type
Charge Controllerr
Datasheet

Specifications of SI9731DQ-T1

Output Voltage
4.1V
No. Of Pins
16
Operating Temperature Range
-40°C To +85°C
Peak Reflow Compatible (260 C)
No
Leaded Process Compatible
No
Battery Type
Li-Ion/NiCD/NiMH
Output Current
1.2A
Operating Temp Range
-40C to 85C
Package Type
TSSOP
Mounting
Surface Mount
Pin Count
16
Operating Temperature Classification
Industrial
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Package / Case
TSSOP-16
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SI9731DQ-T1
Manufacturer:
Infineon
Quantity:
12 000
Part Number:
SI9731DQ-T1-E3
Quantity:
3 000
Part Number:
SI9731DQ-T1-E3
Manufacturer:
FUJI
Quantity:
3 000
Part Number:
SI9731DQ-T1-E3
Manufacturer:
VISHAY/威世
Quantity:
20 000
DESCRIPTION
Si9731 is a chemistry independent battery charger designed
to pulse charge 1-cell to 3-cell NiCd/NiMH or 1-cell Li-ion
batteries. Battery charging is accomplished under direct
control from the system processor. An internal low R
MOSFET can be pulsed on and off at varying duty cycle by
the system processor to pulse charge the battery at high
charge current while minimizing heat dissipation. Provision is
also made to trickle charge a discharged battery until the
battery is charged to a high enough voltage to wake up the
processor so that the processor can take control of the
charging process. For charging Li-ion batteries, Si9731
includes a precision voltage reference and an error amplifier
for constant voltage (CV) charge mode. The Si9731 is
available in lead (Pb)-free TSSOP-16 package and is
classified over the industrial temperature range (- 40 °C to
+ 85 °C).
FUNCTIONAL BLOCK DIAGRAM
Document Number: 71321
S09-2249-Rev. C, 26-Oct-09
for 1-Cell Li-ion or 1-Cell to 3-Cell NiCd/NiMH Batteries
TRICKLECHARGEENABLE
FAST CHARGE
V
CHARGER
CV
ON/OFF
MODE
GND
µP Controlled Battery Charger
DS(on)
Charge Control
FEATURES
APPLICATIONS
• Pulse charges 1-cell Li-ion or 1-cell to 3-cell
• Integrated MOSFETs with bi-directional
• PWM controlled fast charging mode
• Low current trickle charge mode
• Pin selectable 4.1 V or 4.2 V charge termination for Li-ion
• Constant voltage (CV) termination for Li-ion
• Input over-voltage detector with automatic shutdown
• External shutdown
• Under 1 µA reverse battery leakage current in shutdown
• Complete isolation from battery to external power supply
• Thermal shutdown
• Minimum number of external components
• ESD protection to 4 kV on charger input and battery
• TSSOP-16 package (1.2 mm maximum height)
• Halogen-free according to IEC 61249-2-21 definition
• Compliant to RoHS directive 2002/95/EC
• Cellular phone battery charger
• Personal digital assistants
NiCd/NiMH batteries
reverse current blocking in "OFF" mode
in shutdown
output
Fast
Charge
Trickle
Charge
4.1/4.2 V_TAP
Vishay Siliconix
B
a
e
y
V
t
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r
BAT
www.vishay.com
Si9731
1

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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 ...

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