DS9535A Datasheet, PDF (1/18 Pages) Richtek Technology Corporation – High Efficiency Switching Mode Battery Charge

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
V_IN
C1
R1
R2
C_IN
HSD
EN
RT9535A
VIN
V5V
R3
R4 ^R5
C5
C3
C4
VFB
VHH
C10
ISET
VC
SS
GND
VFB
VHH
NTC
BOOT
SW
PGND
SNSH
SNSL
BATT
C2
D2 D3
To RS3
VHH
R7
C6
C7
R6
R_NTC
R8
D1
C8
L1
RS1
RS3 RS2
C11
C_BATT
RF2
RF1
V_BATT
To V_FB
Copyright © 2016 Richtek Technology Corporation. All rights reserved.
DS9535A-04 February 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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