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RT9534

Richtek Technology
Part Number RT9534
Manufacturer Richtek Technology
Description High Efficiency Switching Mode Battery Charger
Published May 23, 2016
Detailed Description RT9534 High Efficiency Switching Mode Battery Charger General Description The RT9534 is a PWM switch mode battery char...
Datasheet PDF File RT9534 PDF File

RT9534
RT9534

Overview
RT9534 High Efficiency Switching Mode Battery Charger General Description The RT9534 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 programmed by external resistor.
The constant voltage output can support up to 22V 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 RT9534 can charge batteries from 2.
5V to 22V 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 programmed charge current.
The RT9534 is available in WQFN-24L 4x4 Package.
Features  Fast Charging for Li-Ion, NiMH and NiCd Batteries  Adjustable Battery Voltages from 2.
5V to 22V  High Efficiency : Up to 95%  Charging Current Programmed by Resistor  Precision 0.
5% Charging Voltage Accuracy  Provide 5% Charging Current Accuracy  Input Current Limit Maximizes Charging Rate  Synchronous Converter with 400kHz Switching Frequency  Flag Indicates Li-Ion Charge Completion  Auto Shutdown with Adapter Removal Applications  Notebook Computers  Portable Instruments  Chargers for Li-lon, NiMH, NiCd and Lead Acid Rechargeable Batteries Simplified Application Circuit VIN M1 SI 4435 RS4 CIN R1 S1 R2 C1 R3 R4 R5 C5 C3 C4 200 C2 V5V ACN ACP ACDRV BOOT TG EN VIN ISET VC SW RT9534 BG PGND SGND FBR VFB MODE NTC STATUS SS C7 R6 D2 MMSD4148T1G D3 MMSD4148T1G To VHH Pin M2 SI4412 C8 L1  RF2  VBATT = 2.
5  1+ RF1+200  RS1 BATT M3 SI4412 RS3 RS2 SGND S2 V5V RF2 RF1 CBATT Css C9 R9 RNTC R 10 VHH BATT SNSL SNSH SNS C6 C11 Copyright © 2015 Richt...


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