RT9535A
High Efficiency Switching Mode Battery Charger
General Description
The RT9535A is a PWM switch mode battery ch...
RT9535A
High Efficiency Switching Mode Battery Charger
General Description
The RT9535A 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 RT9535A can charge batteries from 2.5V to 22V with dropout
voltage as low as 0.4V. The RT9535A is available in the WQFN-16L 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 500kHz Switching Frequency Auto Shutdown with Adapter Removal
Applications
Notebook Computers Portable Instruments Chargers for Li-lon, NiMH, NiCd and Lead Acid
Rechargeable Batteries
Simplified Application Circuit
D4 VIN
C1 R2
R1
CIN
HSD EN RT9535A
VIN V5V
R3 R4 R5
C3 C4
C5
VFB VHH
ISET VC SS
GND VFB
VHH
NTC
BOOT SW
PGND SNSH SNSL BATT
C2
D2 D3
To RS3 VHH
R7 C6
C7
R6 RNTC
R8 D1
C8 L1 RS1 RS3 RS2
CBATT
RF2 RF1
VBATT To VFB
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