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RT9531

Richtek
Part Number RT9531
Manufacturer Richtek
Description High Efficiency Switching Mode Battery Charger
Published May 27, 2016
Detailed Description ® RT9531 High Efficiency Switching Mode Battery Charger General Description The RT9531 is a PWM switch mode battery ch...
Datasheet PDF File RT9531 PDF File

RT9531
RT9531

Overview
® RT9531 High Efficiency Switching Mode Battery Charger General Description The RT9531 is a PWM switch mode battery charger controller to fast charge single or multiple Li-Ion, NiMH and NiCd batteries, using constant current or constant voltage control.
Maximum current can be easily adjusted by external resistor.
The constant voltage output can support up to 4 Li-Ion cells with 0.
5% accuracy.
A third control loop limits the input current drawing from the adapter during charging.
This allows simultaneous operation of the equipment and fast battery charging without over loading to the adapter.
The RT9531 can charge batteries from 2.
5V to 4.
2V with dropout voltage as low as 0.
4V.
A diode is not required in series with the battery because the charger automatically enters a 10μA sleep mode when the adapter is unplugged.
A logic output indicates Li-Ion full charge when current drops to 20% of the full-scale adjusted charge current.
Marking Information 1X=YM DNN 1X= : Product Code YMDNN : Date Code Features  Fast Charging for Li-Ion, NiMH and NiCd Batteries  Preset Battery Voltages : 4.
2V  High Efficiency : Up to 95%  Precision 0.
5% Charging Voltage Accuracy  5% Charging Current Accuracy  Charging Current Adjusted by Resistor  0.
4V Dropout Voltage  Input Current Limit Maximizes Charging Rate  475kHz Switching Frequency  Flag Indicates Li-Ion Charge Completion  Auto Shutdown with Adapter Removal  Only 10μA Battery Drain When Idle  Available in an WQFN-16L 4x4 Package  RoHS Compliant and Halogen Free Applications  Notebook Computers  Portable Instruments  Chargers for Li-Ion, NiMH, NiCd and Lead Acid Rechargeable Batteries Simplified Application Circuit VIN CIN M1 R1 RS4 C1 R2 C2 RT9531 ACN V5V ACP ACDRV BOOT R3 (Option) C3 (Option) R4 R5 C4 VHH C5 (Option) EN VIN ISET VC VHH TG SW STATUS SNSH SNSL C6 GND BATT To System Power C7 R7 R6 C9 D2 D3 To VHH Pin M2 C8 L1 RS1 D1 RS3 RS2 VBATT CBATT Copyright ©2016 Richtek Technology Corpora...


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