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PDF RT9466 Data sheet ( Hoja de datos )
| Número de pieza | RT9466 | |
| Descripción | 5A Single Cell Li-Ion Switching Battery Charger | |
| Fabricantes | Richtek Technology | |
| Logotipo |  |
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®
RT9466
5A Single Cell Li-Ion Switching Battery Charger with Power
Path Management and USB-OTG Boost Mode
General Description
The RT9466 is a switch-mode single cell Li-Ion/Li-Polymer
battery charger for portable applications. It integrates a
synchronous PWM controller, power MOSFETs, input
current sensing and regulation, high-accuracy voltage
regulation, and charge termination. The charge current is
regulated through integrated sensing resistors. The
RT9466 also features USB On-The-Go (OTG) support.
The RT9466 optimizes for charging task by using a control
algorithm to vary the charge rate for different modes,
including pre-charge mode, fast charge mode (constant
voltage and constant current). The key charge parameters
are programmable through an I2C interface. The RT9466
will resume the charge cycle whenever the battery voltage
falls below an internal recharge threshold, and can
automatically enter sleep mode if the input power supply
is removed.
Other features include under-voltage protection, over
voltage protection, thermal regulation and reverse leakage
protection.
The RT9466 is available in a WQFN-24L 4x4 package.
Applications
Cellular Telephones
Personal Information Appliances
Tablet PC, Power Bank
Portable Instruments
Ordering Information
RT9466
Package Type
QW : WQFN-24L 4x4 (W-Type)
(Exposed Pad-Option 2)
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Features
High Efficiency 5A, 1.5MHz Switching Charger with
Output Inductor DFE252012F, TOKO
Charging Efficiency 90.25% at ICHG = 2A
Charging Efficiency 88.86% at ICHG = 3A
Charging Efficiency 84.2% at ICHG = 5A
Synchronous 1.5MHz/0.75MHz Fixed-Frequency
PWM Controller with Up to 95% Duty Cycle
Power Path Management by BATFET Control
Support High Voltage Input (9V/12V)
Support High Voltage Input Adapter (Pump Express
1.0/2.0)
Support IR Compensation Function from Charger
Output to Cell Terminal
Optimize Input Sourcing Capability to Prevent
Overload
AICR Current Limit Setting via I2C
ILIM Pin for Current Limit Setting
Average Input Current Limit Measurement
Shipping Mode for Battery Leakage Reduction
Wake Up System, Exit Shipping Mode, and Reset
System by QON Pin
Automatic Charging
Average Input Current Regulation (AICR) :
0.1A to 3.25A in 50mA Steps
Charge Current Regulation Accuracy : ± 7%
Charge Voltage Regulation Accuracy : ± 1% (0 to
85°C)
Protection for Overall System Considerations
Thermal Regulation for Current Reduction and
Over-Temperature Protection
Input Over-Voltage Protection
Input Bad Adapter Protection
Battery Over-Voltage Protection
Support ADC Conversion for
VBUS, VBAT, VSYS, REGN, TS_BAT, IBUS, IBAT,
TEMP_JC
INT Output for Communication with Host Through
I2C (Watch Dog / Polling Function)
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS9466-01 December 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
Operation
The RT9466 is an integrated single cell Li-ion battery
switching charger with power path controller.
Base Circuits
Base circuits provide the internal power, VREGN and
reference voltage and bias current.
Protection Circuits
The protection circuits include the VINOVP, VINUVLO,
BATOVP and OTP circuits. The protection circuits turn
off the charging when the input power or die temperature
is in abnormal level.
Buck Regulator for charging and Boost Regulator
as OTG
The multi-loop controller controls the operation of charging
process and current supply to the system. It also controls
the circuits as a Boost converter for OTG applications.
Battery Detection
The RT9466 is capable of doing the battery absence
detection. The detection protects the charger when battery
is removed accidentally.
Adapter Detection
If the poor input power source is connected to RT9466,
the operation is shut down by the adapter detection.
Power Path Management and Control
Once the battery voltage increase to a defined system
minimum regulation voltage, the internal path between
SYS and BAT will be fully turned on. That is, a better
charging efficiency can be derived. When end of charge
occurs, the charging stops and the internal path will be
turned off.
USB Charger Detection
The RT9466 detects and distinguishes Standard
Downstream Port, Charging Downstream Port and
Dedicated Charging Port via DP and DM pins.
RT9466
TS Detection
The RT9466 detects the temperature of the battery pack
via REGN and TS pins. The REGN pin provides a constant
voltage source used to drive the voltage divider composed
of a pulled-high resister and a NTC resister. The RT9466
reports the sensing results via IRQ and status bits for
COLD, COOL, WARM and HOT.
I2C Controller
The key parameters of charging and OTGare programmable
through I2C commands.
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS9466-01 December 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
RT9466
Parameter
Symbol
Inductor Over-Current
Protection Boost Threshold IOCP_BOOST
Current Pulse Control, PE1.0
Current Pulse Control Stop
Pulse
tPUMPX_STOP
Current Pulse Control Long
On Pulse
tPUMPX_ON1
Current Pulse Control Short
On Pulse
tPUMPX_ON2
Current Pulse Control Off
Pulse
tPUMPX_OFF
Current Pulse Control Stop
Start Delay
tPUMPX_DLY
I2C Characteristics
Output Low Threshold
Voltage
VOL_I2C
SCL, SDA Input Logic High
Threshold Voltage
VIH_I2C
SCL, SDA Input Logic Low
Threshold Voltage
VIL_I2C
SCL Clock
High Level Leakage
Current
Load Capacitance
fSCL
IBIRS
CLOAD
Default Wait Time for
Watch Dog Reset
tWDT_DEF
NTC Monitor
Battery Temperature HOT
Threshold
VVTS_HOT
Battery Temperature
WARM Threshold
VVTS_W ARM
Battery Temperature COOL
Threshold
VVTS_COOL
Battery Temperature COLD
Threshold
VVTS_COLD
Battery Temperature
Hysteresis
VVTS_HYS
Control I/O Pin (STAT, PG , INT)
Output Low Voltage
VOL_CTRL
Control I/O Pin (OTG, CEB, PSEL, QON )
Input Threshold Voltage
VIH_CTRL
VIL_CTRL
Test Conditions
Min Typ Max Unit
Inductor OCP level for boost mode -- 5.5 -- A
430 -- 570 ms
240 -- 360 ms
70 -- 130 ms
70 -- 130 ms
80 -- 225 ms
IDS = 10mA
-- -- 0.4 V
1.3 --
-- V
VPULL_UP = 1.8V, SDA and SCL
VPULL_UP = 1.8V
Watch Dog timer selection,
Default : 0x0D[6] = 1
-- -- 0.4 V
-- -- 400 kHz
-- -- 1 A
-- -- 1 pF
-- 500 -- ms
VTS falling, the ratio of VREGN
VTS falling, the ratio of VREGN
VTS rising, the ratio of VREGN
VTS rising, the ratio of VREGN
33.5 34.5 35.5 %
44 45 46 %
67.5 68.5 69.5 %
72.5 73.5 74.5 %
-- 2 -- %
IDS = 10mA
Logic High Threshold
Logic Low Threshold
-- -- 0.4 V
1.3 --
--
V
-- -- 0.4
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS9466-01 December 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet RT9466.PDF ] | |
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