®
RT9465
3A Single Cell Li-on Battery Slave Switching Charger
General Description
Features
The RT9465 is a switch-mode single cell li-Ion/Li-Polymer
battery charger for portable applications. It integrates a
Input Voltage Range : 3.9V to 14V
Synchronous 1.5MHz/0.75MHz Switching Frequency
95% Max. Duty
Up to 92%/94% Peak Efficiency at VIN = 9V/5V
VIN Over-Voltage Protection : 14.5V
VIN Under-Voltage Protection : 3.8V
VIN Under-Voltage-Lock-Out : 3.3V
Fault Detection (VIN and VBAT Monitoring)
Programmable Minimum Input Voltage Range :
3.9V to 13.4V (0.1V/Step)
Programmable Battery Voltage Regulation Range :
3.8V to 5.06V (0.02V/Step)
Programmable End of Charge Range : 0.6A to 1.6A
(0.1A/Step)
Programmable Average Output Current Regulation
Range : 0.6A to 3A (0.1A/Step)
Junction Temperature Monitor : 60°°C to 116°°C (4°°C/
Step)
VIN Minimum Input Voltage Regulation (MIVR) : ±3%
Battery CV (Constant Voltage) Regulation : ±1%
Output CC (Constant Current) Regulation, Output
Current < 1A : ±100mA (VIN = 9V/12V)
Output CC (Constant Current) Regulation, Output
Current > 1A : ±10% (VIN = 9V/12V)
Junction Temperature Monitor Accuracy : ±3°°C
Thermal Shutdown : 160°°C
synchronous PWM controller and high accuracy voltage
regulation. Besides, the charging current is regulated
through the integrated sensing MOSFET.
The RT9465 optimizes the charging task by using a control
algorithm to vary the charge rate via different modes,
including fast charge mode and constant voltage mode.
The key charge parameters are programmable via the I2C
interface. The junction temperature is monitored by ADC.
Other features include under-voltage protection, overvoltage protection (including VBAT and VIN side), thermal
regulation and MIVR.
The RT9465 is available in a WQFN-16L 3x3 package.
Ordering Information
RT9465
Package Type
QW : WQFN-16L 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
Suitable for use in SnPb or Pb-free soldering processes.
ments of IPC/JEDEC J-STD-020.
Applications
Marking Information
K7= : Product Code
K7=YM
DNN
YMDNN : Date Code
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
DS9465-01
November 2018
Cellular Telephones
Personal Information Appliances
Tablet PC, Power Bank
Portable Instruments
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
RT9465
Pin Configuration
BOOT
SW
SW
SW
(TOP VIEW)
16
15
14
13
VIN
1
12
PGND
VIN
2
11
PGND
REG
3
10
AGND
SDA
4
9
BAT+
AGND
5
6
7
8
SCL
EN
INT
BAT-
17
WQFN-16L 3x3
Functional Pin Description
Pin No.
Pin Name
Pin Function
1, 2
VIN
Power input. Bypass VIN to GND with a 2.2F/25V ceramic capacitor.
3
REG
PWM low-side driver and bootstrap power supply. Bypass REGN to GND with
a 4.7F/6.3V ceramic capacitor.
4
SDA
I2C interface serial clock input. Open-drain. An external pull-up resistor 10k
is required.
5
SCL
I2C interface serial data input/output. Open-drain. An external pull-up resistor
10k is required.
6
EN
Device enable control pin. Pull low to disable device.
7
INT
Open-drain. Interrupt signal to Host.
8
BAT-
Negative battery voltage sense.
9
BAT+
Positive battery voltage sense.
10,
17 (Exposed Pad)
AGND
Analog ground. The exposed pad must be soldered to a large PCB and
connected to AGND for maximum thermal dissipation.
11, 12
PGND
Power ground.
SW
Switch node. Connect to an external inductor.
BOOT
Bootstrap supply for high-side MOSFET. Connect 47nF/16V ceramic capacitor
across BOOT and SW.
13, 14, 15
16
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is a registered trademark of Richtek Technology Corporation.
DS9465-01
November 2018
RT9465
Typical Application Circuit
RT9465
(Slave Charger)
RT9466
(Main Charger)
VBUS
3.9V to 14V
1
REGN
VBUS
1, 2
VREG_M
22
10
VSYS
OTG
12
QON
9
ENB
5
SCL
6
SDA
CIN_1
4.7µF
8
REG
3
VREG_S
CREG_S
4.7µF
STAT
19, 20
SW
15, 16
SYS
13, 14
BAT
QON
CEB
SCL
TS
SDA
CIN_2
4.7µF
BOOT
CBT_M
47nF
L1
1µH
GPIO
VSYS
CSYS
10µF
CBAT
10µF
11
6
5
4
CSYS
10µF
IRQ_S
7
EN
SW
SCL
16
CBT_S
47nF
L2
1µH
13, 14, 15
VOUT
COUT
10µF
SDA
BAT+
INT
+
7 INT
3
PG
IRQ_M
PGOOD
VIN
VMID
VMID 23
ILIM
R1
698
4
CIN_S
2.2µF
CREG_M
4.7µF
CIN
2.2µF
BAT-
9
8
VREG_M
AGND
PGND
11, 12
10 17
(Exposed Pad)
PGND
17, 18,
25 (Exposed Pad)
Note : The total CIN of slave charger between PMID pin of main charger is 10µF at least.
Table 1. Component List of Evaluation Board
Reference
Qty
Part Number
Description
Package
Manufacturer
CIN_S
1
GRM155R61E225KE11
2.2F/25V/X5R
0402
muRata
CREG_S
1
GRM155R60J475ME47
4.7F/6.3V/X5R
0402
muRata
CBT_S
1
GRM033R61C473KE84
47nF/16V/X5R
0201
muRata
COUT
1
GRM188R61A106KE69
10F/10V/X5R
0603
muRata
L2
1
DFE252012F-1R0M
1H
2.5x2.0x1.2
muRata
U1
1
RT9465GQW
Chip
WQFN-16L 3x3
RICHTEK
Note 1. The total CIN of slave charger between PMID pin of main charger is 10μF at least.
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
DS9465-01
November 2018
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3
RT9465
Functional Block Diagram
VIN
OVP/
UVP
Pre-regulator
REG
BOOT
Oscillator
EN
Digital
Control
Q1
Controller
SW
SCL
2
I C Control
Q2
PGND
SDA
INT
Protection
Q3
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4
Battery
Monitoring
BAT+
BAT-
Junction
Temperature
Monitoring
AGND
is a registered trademark of Richtek Technology Corporation.
DS9465-01
November 2018
RT9465
Absolute Maximum Ratings
(Note 2)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------BOOT -----------------------------------------------------------------------------------------------------------------------SW ---------------------------------------------------------------------------------------------------------------------------REG, SCL, SDA, EN, INT, BAT+, BAT- -----------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C
WQFN-16L 3x3 -----------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 3)
WQFN-16L 3x3, θJA ------------------------------------------------------------------------------------------------------WQFN-16L 3x3, θJC -----------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10sec.) -------------------------------------------------------------------------------Junction Temperature ----------------------------------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------------ESD Susceptibility (Note 4)
HBM (Human Body Model) ----------------------------------------------------------------------------------------------
Recommended Operating Conditions
−0.3V to 22V
−0.3V to 22V
−0.3V to 20V
−0.3V to 6V
3.33W
30°C/W
7.5°C/W
260°C
150°C
−65°C to 150°C
2kV
(Note 5)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------Charge Current, IBAT ----------------------------------------------------------------------------------------------------Battery Voltage, VBAT --------------------------------------------------------------------------------------------------Junction Temperature Range -------------------------------------------------------------------------------------------Ambient Temperature Range --------------------------------------------------------------------------------------------
3.9V to 14V
0.6A to 3A
3.8V to 5.06V
−40°C to 125°C
−40°C to 85°C
Electrical Characteristics
(VIN = 5V, VBAT = 4.2V, L = 1μH, CIN_S = 2.2μF, COUT = 10μF, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Quiescent Current
VIN Supply Current
Leakage Current from
Battery
I(VIN)_SW
PWM is switching, VIN = 5V,
VBAT+ = 3.8V
--
8
--
I(VIN)_SW
PWM is switching, VIN = 9V,
VBAT+ = 3.8V
--
28
--
I(VIN)_no_SW
PWM is non-switching, VIN = 5V,
VBAT+ = 4.4V
--
--
2
IBAT_leak
Charger disable, VBAT = 3.8V
--
--
1
A
mA
VIN/VBAT Power up
VIN Under-Voltage
Protection
VUVP
3.67
3.8
3.93
V
VIN Under-Voltage
Protection Hysteresis
VUVP_HYS
120
200
280
mV
3.9
--
13.4
V
Input Power Regulation
Input Voltage Regulation
Range
VMIVR
I2C programmable per 0.1V
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
DS9465-01
November 2018
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
RT9465
Parameter
VMIVR Accuracy
Symbol
Test Conditions
VMIVR_ACC
MIVR = 4.4V, 9V
IC Active Threshold Voltage
VUVLO
VIN rising
IC Active Hysteresis
VUVLO_HYS
VIN falling from UVLO
VIN OVP Threshold Voltage
VINOVP
VIN rising
VIN OVP Hysteresis
VINOVP_HYS
Min
Typ
Max
Unit
3
--
3
%
3.05
3.3
3.55
V
--
150
--
mV
13.5
14.5
15.5
V
--
350
--
mV
Protection
VIN
VBAT
Battery OVP
VBATOVP
(VBATOVP_Rising - VCV)/VCV
102
104
106
%
Battery UVP
VBATUVP
VBAT falling
2.3
2.4
2.5
V
Over-Temperature
Protection
OTP
Thermal shutdown
--
160
--
o
OTP Hysteresis
OTP_HYS
--
10
--
o
Thermal Regulation
Threshold
TR
Charge current begins to reduce
--
120
--
o
VOREG
I2C programmable per 20mV
3.8
--
5.06
V
Thermal Protection
C
C
C
Battery Charging Interval
End of Charge
Battery Voltage Regulation
Battery Voltage Accuracy
VOREG_ACC
Temperature = 0 to 85 C
1
--
1
%
ICHG
I2C programmable per 0.1A
0.6
--
3
A
VIN = 5V, charge current > 1A
15
--
15
VIN = 9V, 12V, charge current > 1A
10
--
10
VIN = 5V, charge current < 1A
150
--
150
VIN = 9V, 12V, charge current < 1A
100
--
100
I2C programmable per 0.1A
0.6
--
1.6
A
VIN = 5V, 9V, 12V, IEOC setting > 1A
15
--
15
%
VIN = 5V, 9V, 12V, IEOC setting < 1A
150
--
150
mA
o
Fast Charge
Charging Current
ICHG Accuracy
ICHG_ACC
End of Charging Current
IEOC
IEOC Accuracy
IEOC_ACC
%
mA
Battery Charger
High-Side On-Resistance
RON(Q1)
From VIN to SW
17
21.5
26
m
Low-Side On-Resistance
RON(Q2)
From SW to PGND
17
21.5
26
m
VIN = 9V, VBAT = 3.8V,
and ICHG = 2.5A
--
89.5
--
%
MHz
Charging Efficiency
Switching Frequency
(1.5MHz)
fOSC1
I2C programmable 1.5 MHz
1.35
1.5
1.65
Switching Frequency
(750kHz)
fOSC2
I2C programmable 0.75MHz
0.675
0.75
0.825 MHz
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is a registered trademark of Richtek Technology Corporation.
DS9465-01
November 2018
RT9465
Parameter
Symbol
Test Conditions
Frequency Accuracy
Maximum Duty Cycle
At minimum voltage input
Minimum Duty Cycle
VREG Regulation
VREG
EN Pull Low
REN
VIN = 5V
Min
Typ
Max
Unit
10
--
10
%
--
95
--
%
0
--
--
%
4.74
4.9
5.06
V
180
500
820
k
--
--
0.4
V
2
I C Characteristics
Output Low Voltage
VOL
IDS = 10mA
SCL, SDA Input Logic High
Threshold Voltage
VIH
1.3
--
--
V
SCL, SDA Input Logic Low
Threshold Voltage
VIL
--
--
0.4
V
--
--
400
kHz
--
--
1
pF
-3
--
3
o
SCL Clock
Load Capacitance
Junction Temperature
Monitor Accuracy
Control I/O Pin
CLOAD
VPULL_UP = 1.8V
EN Input Threshold Voltage
VIH
Logic high threshold
1.2
--
--
V
EN Input Threshold Voltage
VIL
Logic low threshold
--
--
0.4
V
--
--
500
S
Device Turn-On Delay Time
After EN Pull-High
C
Note 2. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those
indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions may affect device reliability.
Note 3. θJA is measured under natural convection (still air) at TA = 25°C with the component mounted on a high effectivethermal-conductivity four-layer test board on a JEDEC 51-7 thermal measurement standard. θJC is measured at the
exposed pad of the package.
Note 4. Devices are ESD sensitive. Handling precaution is recommended.
Note 5. The device is not guaranteed to function outside its operating conditions.
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
DS9465-01
November 2018
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
7
RT9465
Typical Operating Characteristics
Charging Current vs. VBAT
CV vs. Temperature
1.08
4.50
CV set = 4.44V
1.07
Charging Current (A)1
4.45
4.40
CV set = 4.36V
CV (V)
4.35
4.30
4.25
CV set = 4.2V
4.20
1.06
VBUS = 9V
1.05
VBUS = 12V
1.04
1.03
VBUS = 5V
1.02
4.15
1.01
4.10
1.00
ICC = 1A
-50
-25
0
25
50
75
100
3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4
125
VBAT (V)
Temperature (°C)
Efficiency vs. Output Current
VBUS = 5V
Efficiency (%)
Efficiency (%)
Efficiency vs. Output Current
100
98
96
94
92
90
88
86
84
82
80
78
76
74
VBUS = 12V
VBUS = 9V
CV set = 3.8V
0.0
0.5
1.0
1.5
2.0
2.5
Output Current (A)
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8
3.0
100
98
96
94
92
90
88
86
84
82
80
78
76
74
VBUS = 5V
VBUS = 12V
VBUS = 9V
CV set = 4.2V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Output Current (A)
is a registered trademark of Richtek Technology Corporation.
DS9465-01
November 2018
RT9465
I2C Register Information
I2C Slave Address : 1001011 (4BH)
R : Read only
R/W : Read and write
R/C : Read automatically clear
Register Address : 0x00, Register Name : CHG_CTRL0
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
Description
7
RST_REG
0
Y
Y
R/W
All registers reset bit.
0 : No action. (default)
1 : Reset all registers.
(Notice : This bit will be reset to "0" after reset
procedure finish)
6:0
Reserved
0000000
Y
Y
R/W
Reserved
Register Address : 0x01, Register Name : CHG_CTRL1
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
Description
7
CHG_EN
0
Y
Y
R/W
Charging enable
0 : CHG is disabled (default)
1 : CHG is enabled
6:4
Reserved
100
Y
Y
R/W
Reserved
3
IRQ_pulse
0
Y
Y
R/W
IRQ remind function
0 : IRQ reminding is disabled (default)
1 : IRQ reminding is enabled. If IRQ is
triggered and no check action, IRQ pin will be
released with every 2s interval and be
triggered again.
2:0
Reserved
000
Y
Y
R/W
Reserved
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
DS9465-01
November 2018
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
9
RT9465
Register Address : 0x02, Register Name : CHG_CTRL2
Bit
7
Bit Name
Sel_SWFreq
Default
0
WDT
RST
REG
RST
Y
Y
Type
Description
R/W
The switching frequency selection bit
0 : The switching frequency is 1.5MHz.
(default)
1 : The switching frequency is 0.75MHz.
6
FixFreq
0
Y
Y
R/W
Charger switching frequency
0 : Charger switching frequency is varied
(default)
1 : Charger switching frequency is fixed
5
OSCSS_EN
0
Y
Y
R/W
Charger spread spectrum enable
0 : Disabled (default)
1 : Enabled
4:0
Reserved
00000
Y
Y
R/W
Reserved
Register Address : 0x03, Register Name : CHG_CTRL3
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
Description
7:2
VOREG
010100
Y
Y
R/W
1:0
Reserved
00
Y
Y
R/W
Battery regulation voltage. The delta-V of the
battery regulation voltage is 20mV.
000000 : 3.8V
000001 : 3.82V
000010 : 3.84V
…
010100 : 4.2V (default)
010101 : 4.22V
…
101001 : 4.62V
101010 : 4.64V
101011 : 4.66V
...
111111 : 5.06V
Reserved
Type
Description
Register Address : 0x04, Register Name : CHG_CTRL4
Bit
Bit Name
Default
WDT
RST
REG
RST
7:6
THREG
11
Y
Y
R/W
Charger thermal regulation threshold
00 : 60°C
11 : 80°C
10 : 100°C
11 : 120°C (default)
5:0
Reserved
000000
Y
Y
R/W
Reserved
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is a registered trademark of Richtek Technology Corporation.
DS9465-01
November 2018
RT9465
Register Address : 0x05, Register Name : CHG_CTRL5
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
Description
7:1
VMIVR[6:0]
0000101
Y
Y
R/W
Input MIVR threshold setting
0000000 : 3.9V
0000001 : 4V
0000010 : 4.1V
0000011 : 4.2V
0000100 : 4.3V
0000101 : 4.4V (default)
0000110 : 4.5V
…
0011110 : 6.9V
0011111 : 7V
…
0110010 : 8.9V
0110011 : 9V
…
1010000 : 11.9V
1010001 : 12V
…
1011111 : 13.4V
1100000 to 1111111 : 13.4V
0
MIVR_EN
1
Y
Y
R/W
MIVR loop enable
0 : MIVR loop disable
1 : MIVR loop enable (default)
Register Address : 0x06, Register Name : CHG_CTRL6
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
Description
7:3
ICHG[4:0]
10100
Y
Y
R/W
Charging regulation current
00000 to 00110 : 0.6A
...
01001 : 0.9A
01010 : 1A
01011 : 1.1A
...
10011 : 1.9A
10100 : 2A (default)
...
11001 : 2.5A
11010 : 2.6A
…
11101 : 2.9A
11110 to 11111 : 3A
2:0
Reserved
000
Y
Y
R/W
Reserved
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
DS9465-01
November 2018
is a registered trademark of Richtek Technology Corporation.
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11
RT9465
Register Address : 0x07, Register Name : CHG_CTRL7
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
Description
7:4
IEOC[3:0]
0101
Y
Y
R/W
EOC current setting
0000 to 0100 : 600mA
0101 : 600mA (default)
0110 : 700mA
0111 : 800mA
1000 : 900mA
1001 : 1000mA
1010 : 1100mA
1011 : 1200mA
1100 : 1300mA
1101 : 1400mA
1110 : 1500mA
1111 : 1600mA
3
EOC_EN
1
Y
Y
R/W
IEOC enable/disable
0 : Disable
1 : Enable (default)
R/W
EOC deglitch time
000 : 120s
001 : 180s
010 : 240s
011 : 360s
100 : 2ms (default)
101 : 4ms
110 : 8ms
111 : 16ms
2:0
CHG_TDEG_
EOC[2:0]
100
Y
Y
Register Address : 0x08, Register Name : CHG_CTRL8
Bit
7
Bit Name
TE
Default
1
WDT
RST
REG
RST
Y
Y
Type
Description
R/W
Termination enable
0 : Disable charge current termination
1 : Enable charge current termination
(default)
6:5
EOC_TIMER[1
:0]
00
Y
Y
R/W
EOC back-charging time
00 : 0mins (default)
01 : 30mins
10 : 45mins
11 : 60mins
4:0
Reserved
00000
Y
Y
R/W
Reserved
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is a registered trademark of Richtek Technology Corporation.
DS9465-01
November 2018
RT9465
Register Address : 0x09, Register Name : CHG_CTRL9
Bit
Bit Name
7:5
WT_FC[2:0]
Default
000
WDT
RST
REG
RST
Y
Y
Type
Description
R/W
Fast charge timer
000 : 4hrs (default)
001 : 6hrs
010 : 8hrs
011 : 10hrs
100 : 12hrs
101 : 14hrs
110 : 16hrs
111 : 20hrs
4
TMR2X_EN
0
Y
Y
R/W
Double charger timer during MIVR, and
thermal regulation
0 : Disable 2x extended charger timer
(default)
1 : Enable 2x extended charger timer
3
TMR_EN
0
Y
Y
R/W
Charger timer enable/disable
0 : Disable (default)
1 : Enable
2
TMR_PAUSE
0
Y
Y
R/W
Timer control bit
0 : Timer is active (default)
1 : Timer is pause
1:0
Reserved
00
Y
Y
R/W
Reserved
Register Address : 0x0A, Register Name : CHG_CTRL10
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
7
WDT_EN
0
Y
Y
R/W
Watchdog timer enable/disable
0 : Disable (default)
1 : Enable
R/W
Waiting timer to reset I2C setup after
watchdog is asserted
0 : 200ms
1 : 500ms (default)
6
WDT_TRST
1
Y
Y
Description
5:4
WDT[1:0]
01
Y
Y
R/W
Watchdog timer, from WDTEN is enabled to
watchdog IRQ, clear timer by I2C access
00 : 8s
01 : 40s (default)
10 : 80s
11 : 160s
3:0
Reserved
0000
Y
Y
R/W
Reserved
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
DS9465-01
November 2018
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
13
RT9465
Register Address : 0x0C, Register Name : CHG_CTRL12
Bit
7:4
3
Bit Name
ADC_RPT[3:0]
TEMP_EN
Default
0000
1
WDT
RST
REG
RST
Y
Y
Y
Y
Type
Description
R
Report the TEMP_ADC result, sampling
every 64T (22s) and average times (352s if
TEMP_AVG = 0)
0000 : 60 degree
0010 : >64 degree
0011 : >68 degree
0100 : >72 degree
0101 : >76 degree
0110 : >80 degree
0111 : >84 degree
1000 : >88 degree
1001 : >92 degree
1010 : >96 degree
1011 : >100 degree
1100 : >104 degree
1101 : >108 degree
1110 : >112 degree
1111 : >116 degree
R/W
Temperature ADC measurement function
enable/disable
0 : Disable
1 : Enable (default)
2
TEMP_AVG
0
Y
Y
R/W
Choose the average times for TEMP_ADC
code calculate
0 : 16times (default)
1 : 32times
1:0
Reserved
00
Y
Y
R/W
Reserved
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
www.richtek.com
14
is a registered trademark of Richtek Technology Corporation.
DS9465-01
November 2018
RT9465
Register Address : 0x0D, Register Name : CHG_CTRL13
Bit
Bit Name
ADC_HIGH
[3:0]
7:4
3:0
ADC_OFFSET
[3:0]
Default
0011
0000
WDT
RST
REG
RST
Y
Y
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
DS9465-01
November 2018
Y
Y
Type
Description
R/W
Temperature sensor threshold set.
The IRQ "TEMP_H" will be trigger when the
ADC code is larger than ADC_HIGH.
0000 : 60 degree
0010 : >64 degree
0011 : >68 degree (default)
0100 : >72 degree
0101 : >76 degree
0110 : >80 degree
0111 : >84 degree
1000 : >88 degree
1001 : >92 degree
1010 : >96 degree
1011 : >100 degree
1100 : >104 degree
1101 : >108 degree
1110 : >112 degree
1111 : >116 degree
R/W
Temperature sensor threshold set.
The IRQ "TEMP_L" will be trigger when ADC
code is smaller than (ADC_HIGH ADC_OFFSET) after "TEMP_H" trigged.
0000 : 4 degree (default)
0001 : 4 degree
0010 : 8 degree
0011 : 12 degree
0100 : 16 degree
0101 : 20 degree
0110 : 24 degree
0111 : 28 degree
1000 : 32 degree
1001 : 36 degree
1010 : 40 degree
1011 : 44 degree
1100 : 48 degree
1101 : 52 degree
1110 : 56 degree
1111 : 60 degree
is a registered trademark of Richtek Technology Corporation.
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15
RT9465
Register Address : 0x20, Register Name : SYSTEM1
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
Description
Charger status bit
00 : Ready (default)
01 : Charge in progress
10 : Charge done
11 : Fault
7:6
CHG_STAT
00
Y
Y
R
5:4
Reserved
00
Y
Y
R/W
3:1
VERSION[2:0]
000
N
N
R
Version code
0
TRIMDONE
0
N
N
R
Trim done
Reserved
Register Address : 0x30, Register Name : CHG_STATC
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
7
PWR_RDY
0
Y
Y
R
Power ready status bit
0 : Input power is bad, VIN < VUVP (default)
1 : Input power is good, VIN > VUVP
R
Charger warning. Input voltage MIVR loop
active.
0 : MIVR loop is not active (default)
1 : MIVR loop is active
Charger warning. Thermal regulation loop
active.
0 : Thermal regulation loop is not active
(default)
1 : Thermal regulation loop is active
6
CHG_MIVR
0
Y
Y
5
CHG_TREG
0
Y
Y
R
4:0
Reserved
00000
Y
Y
R/W
Description
Reserved
Register Address : 0x31, Register Name : CHG_FAULT
Default
WDT
RST
REG
RST
Bit
Bit Name
7
CHG_
VBUSOV
0
Y
Y
R
VBUS over-voltage protection. Set when
VBUS > VIN_OVP is detected.
0 : VBUS is not over-voltage (default)
1 : VBUS is over-voltage
6
CHG_
VBATSUV
0
Y
Y
R
Charger fault. Battery UVP.
0 : Battery is not UVP (default)
1 : Battery is UVP
5
CHG_
VBATOV
0
Y
Y
R
Charger fault. Battery OVP.
0 : Battery is not OVP (default)
1 : Battery is OVP
4:0
Reserved
00000
Y
Y
R/W
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
www.richtek.com
16
Type
Description
Reserved
is a registered trademark of Richtek Technology Corporation.
DS9465-01
November 2018
RT9465
Register Address : 0x32, Register Name : CHG_IRQ1
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
Description
7
OTPI
0
Y
Y
R/C
Thermal shutdown fault
0 : No event occurs (default)
1 : Event occurs
6
CHG_
ADPBADI
0
Y
Y
R/C
Charger bad adaptor fault
0 : No event occurs (default)
1 : Event occurs
5
CHG_TMRI
0
Y
Y
R/C
Charger timer time-out fault
0 : No event occurs (default)
1 : Event occurs
4
TEMP_H
0
Y
Y
R/C
Temperature too high fault
0 : No event occurs (default)
1 : Event occurs
3
TEMP_L
0
Y
Y
R/C
Temperature too low fault
0 : No event occurs (default)
1 : Event occurs
2
Reserved
0
Y
Y
R/W
Reserved
R/C
Status of each CHG_STATC register
(Reg0x30) is changed
0 : No event occurs (default)
1 : Event occurs
R/C
Status of each CHG_FAULT register
(Reg0x31) is changed
0 : No event occurs (default)
1 : Event occurs
1
0
CHG_STATCI
CHG_FAULTI
0
0
Y
Y
Y
Y
Register Address : 0x33, Register Name : CHG_IRQ2
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
Description
7
CHG_IEOCI
0
Y
Y
R/C
Charging current is lower than EOC current
ever occurs
0 : No event occurs (default)
1 : Event occurs
6
CHG_TERMI
0
Y
Y
R/C
Charge terminated event
0 : No event occurs (default)
1 : Event occurs
5
SSFINISHI
0
Y
Y
R/C
Charger soft-start finishes event
0 : No event occurs (default)
1 : Event occurs
4
WDTMRI
0
Y
Y
R/C
Watch dog timer timeout fault
0 : No event occurs (default)
1 : Event occurs
3:0
Reserved
0000
Y
Y
R/W
Reserved
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
DS9465-01
November 2018
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
17
RT9465
Register Address : 0x40, Register Name : CHG_STATC_Mask
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
7
PWR_RDYM
0
Y
Y
R/W
Power ready interrupt mask
0 : Interrupt is not masked (default)
1 : Interrupt is masked
6
CHG_MIVRM
0
Y
Y
R/W
Input voltage MIVR loop active interrupt mask
0 : Interrupt is not masked (default)
1 : Interrupt is masked
5
CHG_TREGM
0
Y
Y
R/W
Thermal regulation loop active interrupt mask
0 : Interrupt is not masked (default)
1 : Interrupt is masked
4:0
Reserved
00000
Y
Y
R/W
Reserved
Description
Register Address : 0x41, Register Name : CHG_FAULT_Mask
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
Description
7
CHG_
VBUSOVM
1
Y
Y
R/W
VBUS over-voltage protection interrupt mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
6
CHG_
VBATSUVM
1
Y
Y
R/W
Battery UVP interrupt mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
5
CHG_
VBATOVM
1
Y
Y
R/W
Battery OVP interrupt mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
4:0
Reserved
00000
Y
Y
R/W
Reserved
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
www.richtek.com
18
is a registered trademark of Richtek Technology Corporation.
DS9465-01
November 2018
RT9465
Register Address : 0x42, Register Name : CHG_IRQ1_Mask
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
7
OTPM
1
Y
Y
R/W
Thermal shutdown fault interrupt mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
6
CHG_
ADPBADM
1
Y
Y
R/W
Charger bad adaptor fault interrupt mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
5
CHG_TMRM
1
Y
Y
R/W
Charger timer time-out fault interrupt mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
4
TEMP_HM
1
Y
Y
R/W
Temperature too high fault interrupt mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
3
TEMP_LM
1
Y
Y
R/W
Temperature too low fault interrupt mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
2
Reserved
1
Y
Y
R/W
Reserved
1
CHG_
STATCM
R/W
Status of each CHG_STATC register
(Reg0x30) changed interrupt mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
R/W
Status of each CHG_FAULT register
(Reg0x31) changed interrupt mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
0
CHG_FAULTM
1
1
Y
Y
Y
Y
Description
Register Address : 0x43, Register Name : CHG_IRQ2_Mask
Bit
Bit Name
Default
WDT
RST
REG
RST
Type
Description
7
CHG_IEOCM
1
Y
Y
R/C
Charging current is lower than EOC current
interrupt mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
6
CHG_TERMM
1
Y
Y
R/C
Charge terminated event interrupt mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
5
SSFINISHM
1
Y
Y
R/C
Charger soft-start finishes event interrupt
mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
4
WDTMRM
1
Y
Y
R/C
Watch dog timer timeout fault interrupt mask
0 : Interrupt is not masked
1 : Interrupt is masked (default)
3:0
Reserved
1111
Y
Y
R/W
Reserved
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
DS9465-01
November 2018
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
19
RT9465
Application Information
Device Power On
The internal bias circuit is powered from VIN. The device
will be powered on when the VIN is higher than VUVLO
threshold and EN pin is higher than 1.2V. In VIN > VUVLO
and EN pin from low logic to high logic condition, the device
requires maximum 500μs turn on delay time.
system needs to reduce the slave charger's charge
current to next step. When the main charger triggers the
IEOC event and slave charger's ICHG is at 600mA, the
system needs to turn off slave charger and main charger
takes over the constant voltage state period.
Dual charger charge
Dual Charger Program Flow
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20
VBAT (V)
RT9466 IR Compensation
RT9466 Charge current
RT9465 Charge current
VBAT
Time (Hours)
Precharge
Battery charging state
Main charger
Pre-charge state
(Main charger duty)
Pre-charge parameter setting
Fast charge
Constant
voltage
Slave charger
Constant current charge state
(Dual charger work)
1. Set CV point of main charger
2. Set charge current of main
charger
3. Set IEOC
Constant voltage state
(Main charger duty)
Constant voltage state
parameter setting
EOC state
(Main charger duty)
EOC parameter setting
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
End of
charge
IBAT (A)
A main charger (RT9466) is required in the system to
manage pre-charge, fast-charge and constant voltage state.
Below charge profile and program flow show the dual
charge interactions. Once battery voltage higher than precharge voltage, system needs to enable slave charger
(RT9465) to increase charge current and reduce fast charge
period. The CV setting of slave charger needs to higher
than main charger (include main charger's IR
compensation). If main charger triggers IEOC event, the
Main
charger
charge
1. Set battery regulation voltage
(0x03). The setting value needs
higher than CV+IR
compensation of main charger.
2. Set initial charge regulation
current (0x06)
If main charger charge current
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