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PDF RT9538 Data sheet ( Hoja de datos )
| Número de pieza | RT9538 | |
| Descripción | High Efficiency Switching Mode Battery Charger | |
| Fabricantes | Richtek Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT9538 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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®
RT9538
High Efficiency Switching Mode Battery Charger
General Description
The RT9538 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 an external resistor. The constant voltage output can
support up to 30V 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 RT9538 can charge batteries from 2.5V to 25V with
dropout voltage as low as 2V. 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
1C= : Product Code
1C=YM
DNN
YMDNN : Date Code
Features
Fast Charging for Li-ion, NiMH and NiCd Batteries
Adjustable Battery Voltages from 2.5V to 25V
High Efficiency : Up to 95%
Charging Current Adjusted by Resistor
Precision 0.5% Charging Voltage Accuracy
Provide 5% Charging Current Accuracy
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 16-Lead WQFN 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 RS4
C1 R2
C2
RT9538
ACN
V5V
R1
ACP
R3
Option
C3
Option
R4
R5
C4
C5 VFB
Option
ACDRV
BOOT
EN
VIN
ISET
VC
TG
SW
STATUS
VFB
SNSH
GND
SNSL
BATT
To System Power
D2
C7
R7
R6
M2
C8
L1
D1
C9
RS1
RS3 RS2
RF2
VBATT
CBATT
To VFB
RF1
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS9538-01 June 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
RT9538
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, VFB, V5V to GND ----------------------------------------------------------- −0.3V to 6V
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
Junction Temperature ---------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------ 260°C
Storage Temperature Range ------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) --------------------------------------------------------------------------- 2kV
Recommended Operating Conditions (Note 4)
Supply Input 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 = VBATT + 3V, 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
IQ
ISD
IRE V
VUVLO_L
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
VIN Under-Voltage Hysteresis VUVLO_HYS
Reference
-- 300 -- mV
Reference Voltage
FB Leakage Current
VFB
IFB
2.488 2.5 2.512 V
-- -- 0.1 A
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS9538-01 June 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
RT9538
Adapter Insert and Remove
VIN
(10V/Div)
VBATT
(5V/Div)
TG-SW
(5V/Div)
IBATT
(1A/Div)
VIN = 12V, VBATT = 4V, IBATT = 1A
Time (25ms/Div)
Enable
(5V/Div)
VBATT
(5V/Div)
TG-SW
(5V/Div)
IBATT
(1A/Div)
Enable
(5V/Div)
VBATT
(5V/Div)
TG-SW
(5V/Div)
IBATT
(1A/Div)
Charge Disable
IBATT
(1A/Div)
VBATT
(5V/Div)
VIN = 12V, VBATT = 4V, IBATT = 1A
Time (10ms/Div)
IL
(500mA/Div)
TG-SW
(5V/Div)
Battery to GND Short Response
Charge Enable
VIN = 12V, VBATT = 4V, IBATT = 1A
Time (10ms/Div)
Switching
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.
DS9538-01 June 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet RT9538.PDF ] | |
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