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PDF RT9531 Data sheet ( Hoja de datos )
| Número de pieza | RT9531 | |
| Descripción | High Efficiency Switching Mode Battery Charger | |
| Fabricantes | Richtek | |
| Logotipo |  |
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® 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 16.8V 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
0J= : Product Code
0J=YM
DNN
YMDNN : Date Code
Features
Fast Charging for Li-Ion, NiMH and NiCd Batteries
Preset Battery Voltages : 4.2V, 8.4V, 12.6V and 16.8V
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 ©2015 Richtek Technology Corporation. All rights reserved.
DS9531-01 June 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
RT9531
Absolute Maximum Ratings (Note 1)
VIN, EN, ACN, BATT, SW to GND ------------------------------------------------------------------ −0.3V to 36V
ACDRV --------------------------------------------------------------------------------------------------- (ACN − 6V) to (ACN + 0.3V)
ACP ------------------------------------------------------------------------------------------------------- (ACN − 0.3V) to (ACN + 0.6V)
ISET, VC, STATUS, V5V to GND ------------------------------------------------------------------- −0.3V to 6V
VHH ------------------------------------------------------------------------------------------------------- (BATT − 0.3V) to 40V
SNSL ------------------------------------------------------------------------------------------------------ (BATT − 0.3V) to (BATT+0.3V)
SNSH ----------------------------------------------------------------------------------------------------- (SNSL − 0.3V) to (SNSL+0.3V)
BOOT ----------------------------------------------------------------------------------------------------- (SW − 0.3V) to (SW + 6V)
TG ---------------------------------------------------------------------------------------------------------- (SW − 0.3V) to (BOOT + 0.3V)
Power Dissipation, PD @ TA = 25°C
WQFN-16L 4x4 ----------------------------------------------------------------------------------------- 3.5W
Package Thermal Resistance (Note 2)
WQFN-16L 4x4, θJA ------------------------------------------------------------------------------------ 28.5°C/W
WQFN-16L 4x4, θJC ----------------------------------------------------------------------------------- 7°C/W
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------ 260°C
Junction Temperature ---------------------------------------------------------------------------------- 150°C
Storage Temperature Range ------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) --------------------------------------------------------------------------- 2kV
Recommended Operating Conditions (Note 4)
Supply Voltage, VIN ----------------------------------------------------------------------------------- 4.5V to 28V
Junction Temperature Range ------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = max (12V, VCHG + 5V), VBATT is the full charge voltage, pull-up EN to VIN with 100kΩ resistor, TA = 25°C unless otherwise
specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Overall
Supply Quiescent Current
Supply Shutdown Current
Reverse Current from Battery
VIN Under-Voltage Falling
Threshold
VIN Under-Voltage Hysteresis
Charge Voltage
IQ
ISD
IREV
VUVLO_L
VUVLO_HYS
No Charge Current
VEN = 0
VIN Floating, Sleep Mode
Check ACDRV
0.5 1.3
-- --
-- --
2 mA
12 A
10 A
3.6 3.8 4.2 V
-- 300 -- mV
1-Cell
4.179 4.2 4.221
Full Charge
Voltage
2-Cell
3-Cell
VBATT
8.358 8.4 8.442
12.537 12.6 12.663
V
4-Cell
16.716 16.8 16.884
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS9531-01 June 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
RT9531
Charge Enable and Disable
Adapter Insert and Remove
EN
(5V/Div)
VBATT
(5V/Div)
TG − SW
(5V/Div)
IBATT
(1A/Div)
VIN = 12V, VBATT = 4V, IBATT = 1A
Time (25ms/Div)
VIN
(10V/Div)
VBATT
(5V/Div)
TG − SW
(5V/Div)
IBATT
(1A/Div)
VIN = 12V, VBATT = 4V, IBATT = 1A
Time (25ms/Div)
Charge Enable
Charge Disable
EN
(5V/Div)
VBATT
(5V/Div)
TG − SW
(5V/Div)
IBATT
(1A/Div)
VIN = 12V, VBATT = 4V, IBATT = 1A
Time (10ms/Div)
Switching
EN
(5V/Div)
VBATT
(5V/Div)
TG − SW
(5V/Div)
IBATT
(1A/Div)
VIN = 12V, VBATT = 4V, IBATT = 1A
Time (10ms/Div)
Battery to GND Short Response
IBATT
(1A/Div)
VBATT
(2V/Div)
IL
(500mA/Div)
TG − SW
(5V/Div)
VIN = 12V, VBATT = 4V, IBATT = 1A
Time (1μs/Div)
VBATT
(5V/Div)
TG − SW
(5V/Div)
IL
(1A/Div)
IIN
(500mA/Div)
VIN = 12V, VBATT = 4V, IBATT = 1A
Time (10ms/Div)
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS9531-01 June 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet RT9531.PDF ] | |
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