DS9528 01

®
RT9528
I2C Programmable Linear Single Cell Li-Ion Battery Charger
with Auto Power-Path Management and USB/AV Switch
General Description
Features
The RT9528 is a programmable single-cell Li-ion battery
charger with I2C programmable control I/F, Auto PowerPath Management IC and USB/AV Switch. For the
RT9528, there is no need to use external MOSFET. The
RT9528 enters sleep mode when supplies are removed.
The RT9528 optimizes the charging task by using a control
algorithm including pre-charge mode, fast charge mode
and constant voltage mode. The RT9528 includes
termination, timer, charge current and VSYS settings via a
serial I2C control I/F.
z
The RT9528 provides protections for the battery pack,
charger and input circuitry such as over current, under
voltage, over voltage, thermal regulation and thermal
protection. Status can be monitored via the serial port for
charge state and fault conditions.
The internal thermal feedback circuitry regulates the die
temperature to optimize the charge rate for all ambient
temperatures.
Ordering Information
RT9528
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28V Maximum Rating for AC Adapter
Auto Power Path Management (APPM)
High-Speed USB Operation
USB/Audio/Video Switches
Negative Rail Audio Signal Path
I2C controlled Interface
Integrated 3.3V LDO for TS Circuitry
Integrated Power MOSFETs
Interrupt Status Indicator
Power Good and Charge Status Indicators
Under/Over Voltage Protection
Thermal Feedback Optimizing Charge Rate
28-Lead WQFN Package
RoHS Compliant and Halogen Free
Applications
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Digital Cameras
PDAs and Smart Phones
Portable Instruments
Pin Configurations
(TOP VIEW)
Note :
Richtek products are :
`
RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
`
Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
44= : Product Code
44=YM
DNN
28 27 26 25 24 23 22
PRECHGEN
SETNTC
VIN
VIN
GND
VEXT
VP
1
21
2
3
4
5
6
7
20
19
18
17
16
15
GND
29
VDET
CHG
WKUP
INT
SCL
SDA
COMP
8 9 10 11 12 13 14
TEMPIN
TEMPOUT
DN
DP
AUDIO1
AUDIO2
COMN
Lead Plating System
G : Green (Halogen Free and Pb Free)
TEST
NC
SYS
SYS
BAT
BAT
BATS
Package Type
QW : WQFN-28L 4x4 (W-Type)
WQFN-28L 4x4
YMDNN : Date Code
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
RT9528
Typical Application Circuit
3, 4 VIN
USB or Adapter
RT9528
VP 7
CIN
R1
25, 26
To System Load
CSYS
Charging
indicator
R3
Micro
Controller
R4
BATS
22
CHG
BAT
R5 R6
19 WKUP
Wake-up indicator
18
INT
Interrupt indicator 17
SCL
16
SDA
Chip Enable
If bad or weak battery, charge current 66mA
23, 24
CBAT
TEMPOUT 9
VEXT 6
1 PRECHGEN
TEST
28
VDET 21
+
NTC
ADC or DSP
From PMU
Test Mode
Detect Bad or good battery
2 SETNTC
NTC 100k NTC 10k
USB 2.0
High speed
10 DN
11 DP
Video
12 AUDIO1
Audio
13 AUDIO2
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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2
TEMPIN
R2
20
External Power
IOVCC
SYS
8
COMN 14 DCOMP 15 D+
GND
USB
Interface
5, 29 (Exposed Pad)
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
Functional Pin Description
Pin No.
Pin Name
Pin Function
6
VEXT
7
VP
66mA auto charging enable for weak and dead battery. H = disable, L =
enable 200kΩ pull low.
Set NTC Initial Condition Input. H = NTC resistor 10kΩ, L = NTC resistor
100kΩ. 200kΩ pull low.
Power Input.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
External power for the power of TS LDO. Note the power of TS_LDO will
choose maximum voltage between VEXT and VDDA.
3.3V LDO Output. The regulator only provides thermistor with resistor power.
8
TEMPIN
Detect the Presence of Battery. Connect TEMPIN to NTC thermistor.
9
TEMPOUT
Connect to ADC of DSP.
10
DN
USB Input for D−.
11
DP
USB Input for D+.
12
AUDIO1
Audio or Video Input.
13
AUDIO2
Audio or Video Input.
14
COMN
Common Output N. Connect to D− on mini/micro USB connector.
15
COMP
Common Output P. Connect to D+ on min/micro USB connector.
16
SDA
l2C Serial Data Input/Output. Connect an external pull up resistor.
17
SCL
l C Serial Clock Input. Connect an external pull up resistor.
18
INT
19
WKUP
20
CHG
21
VDET
Interrupt Status Open-Drain Output. Connect an external pull up resistor.
Initial active low.
Power Good Status Open-Drain Output. Connect an external pull up resistor.
Active low.
Charging Status Open-Drain Output. Connect an external pull up resistor.
Active low.
Voltage Detection Input.
22
BATS
Battery Sense. Connect battery.
23, 24
BAT
Battery Charge Current Output.
25, 26
SYS
Connect this pin to a system with a minimum 10μF ceramic capacitor to GND.
27
NC
No Internal Connection.
28
TEST
Test Mode. Internal 200kΩ pull up. H : Normal, L : Test mode, USB switch turn
on and set USB 500mA mode. If TEST = L, RT9528 will set PRECHGEN = 1
internally.
1
PRECHGEN
2
SETNTC
3, 4
VIN
5,
GND
29 (Exposed Pad)
2
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3
RT9528
Function Block Diagram
M1
VIN
Pre-regulator
VDDA
SYS
M2
Control
circuit
BAT
BATS
CHG
Thermal
circuit
CC/CV/TR
/APPM
Multi Loop
Controller
Sleep
Mode
-
VDET
1V
WKUP
+
OVP
INT
UVLO
SCL
SDA
Logic
PRECHGEN
VDDA
200k
VEXT
SETNTC
LDO
VP
TEMPIN
+
VDDA
VBAT
Battery
Detect
+
TEMPOUT
VDD
COMN
Too Cold
+
USB Charger
Detection
Cold
-
TS
+
Hot
Charge
Pump
COMP
VDD
-
GND
200k
Select
Max.
+
Too Hot
-
200k
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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4
DP
AUDIO2
DN
AUDIO1
TEST
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
Absolute Maximum Ratings
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(Note 1)
Supply Input Voltage, VIN -------------------------------------------------------------------------------------------------- −0.3V to 28V
SETNTC, PRECHGEN ----------------------------------------------------------------------------------------------------- −0.3V to 28V
Other Pins --------------------------------------------------------------------------------------------------------------------- −0.3V to 6V
BAT Continuous Current (between BAT and SYS pins) (Note 2) ----------------------------------------------- 2.5A
Power Dissipation, PD @ TA = 25°C
WQFN-28L 4x4 -------------------------------------------------------------------------------------------------------------- 1.923W
Package Thermal Resistance (Note 3)
WQFN-28L 4x4, θJA --------------------------------------------------------------------------------------------------------- 52°C/W
WQFN-28L 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 4)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------------ 2kV
MM (Machine Mode) -------------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions
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(Note 5)
Supply Input Voltage Range, VIN (ISETL = 1) ------------------------------------------------------------------------- 4.35V to 6V
Supply Input Voltage Range, VIN (ISETL = 0) ------------------------------------------------------------------------- 4.45V to 6V
Supply Input Voltage Range, VEXT (If VIN No Use) ------------------------------------------------------------------- 4V to 5.5V
Junction Temperature Range ---------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range ---------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 5V, VBAT = 4V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
3.1
3.3
3.5
V
Supply Input Voltage
VIN Under Voltage Lockout
Threshold
VUVLO
VIN Under Voltage Lockout
Hysteresis
VUVLO_HYS
--
240
--
mV
VIN-BAT VOS Rising
VOS_H
--
100
200
mV
VIN-BAT VOS Falling
VOS_L
10
50
--
mV
3.5
--
4.26
V
4.16
4.2
4.23
V
4.3
4.4
4.5
V
5.3
5.5
5.7
V
Voltage Regulation
2
Battery Regulation Voltage
VREG
Set by I C, 20mV/step
Battery Regulation Voltage
Accuracy
VREG2
VREG = 4.2V, 0°C to 85°C
System Regulation Voltage
VSYS1
Set by I C , ISYS = 800mA
System Regulation Voltage
VSYS2
VIN = 6V, Set by I C , ISYS = 800mA
APPM Regulation Voltage
VAPPM
ISETL = 0, ISETU = 1
3.85
3.95
4.05
V
DPM Regulation Voltage
VDPM
ISETL = 0, ISETU = X
4.3
4.4
4.5
V
2
2
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
RT9528
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
VIN to VSYS MOSFET Ron
RDS(ON)
IVIN = 1A, ISETL = 1
--
0.25
0.5
Ω
BAT to VSYS MOSFET Ron
RDS(ON)
VBAT = 4.2V, ISYS = 1A
--
0.05
0.1
Ω
Re-charge Threshold
ΔVRECHG
VREG – Recharge level
60
100
140
mV
Charge Current Setting Range
I CHG
Set by I C, 16 steps
66
--
1200
mA
Charge Current Setting Range 2
I CHG2
ICHG = 600mA
570
600
630
mA
1.2
1.5
1.8
A
I VIN
ISETL = 1, (1.5A mode)
ISETL = 0, ISETU = 1
(500mA mode)
ISETL = 0, ISETU = 0
(100mA mode)
450
475
500
mA
90
95
100
mA
Current Regulation
VIN Current Limit
2
Pre-Charge
BAT Pre-Charge to Fast-Charge
Threshold
BAT Pre-Charge to Fast-Charge
Threshold 2
BAT Pre-Charge Threshold
Hysteresis
2
VPRECH-R
Set by I C, VBAT Rising
2.4
--
3.1
V
VPRECH-R2
VBAT = 3V, VBAT Rising
2.9
3
3.1
V
ΔVPRECH
VBAT Falling
--
200
--
mV
Pre-Charge Current
I PRECH
Set by I C, VBAT = 2V,
40
--
100
mA
Pre-Charge Current 2
I PRECH2
IPRECH = 60mA, VBAT = 2V,
48
60
72
mA
I TERM
Set by I C
0
--
35
%
I TERM2
ITERM = 10%
5
10
15
%
Time Out (Pre-Charge)
t PCHG
Set by I C
30
--
60
Min.
Time Out (Fast-Charge)
t FCHG
Set by I C
240
--
480
Min.
t PCHG1
Time (Pre) = 30min
22.5
30
37.5
Min.
t FCHG1
Time (Fast) = 240min
180
240
300
Min.
tWKUP
PRECHGEN = H
--
--
1
s
t OVP
--
50
--
μs
t PF
--
25
--
ms
t FP
--
25
--
ms
Termination Deglitch Time
t TERMI
--
25
--
ms
Recharge Deglitch Time
t RECHG
--
100
--
ms
--
25
--
ms
--
25
--
ms
2
Charge Termination Detection
Termination Current Ratio to Fast
Charge
Termination Current Ratio to Fast
Charge 2
Timer
Time Out for Pre-Charge
(Stand-alone)
Time Out for Fast-Charge
(Stand-alone)
WKUP Deglitch Time
Input Over Voltage Blanking Time
Pre-Charge to Fast-Charge
Deglitch Time
Fast-Charge to Pre-Charge
Deglitch Time
Input Power Loss to SYS LDO
Turn-Off Delay Time
Pack Temperature Fault
Detection Deglitch Time
t No-in
t TS
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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6
2
2
2
VIN > VUVLO, VIN falling until
less than VBAT
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Short-Circuit, Deglitch Time
tSHORT
--
256
--
μs
Short-Circuit, Recovery Time
tSHORT_R
--
64
--
ms
Session valid to connect for
PD with Dead or Week Battery
tSVLD_Con_WKB
15
--
45
Min.
Login Input/Output
INT Pull Down Voltage
VINT
IINT = 5mA
--
200
--
mV
CHG Pull Down Voltage
VCHG
ICHG = 5mA
--
200
--
mV
WKUP Pull Down Voltage
VWKUP
IWKUP = 5mA
--
200
--
mV
PRECHGEN, SETNTC, TEST
Threshold
VI_H
1.5
--
--
V
VI_L
--
--
0.4
V
PRECHGEN Pull Low Resistor
RPRECHGEN
--
200
--
kΩ
RSETNTC
--
200
--
kΩ
SETNTC Pull Low Resistor
2
Digital Signals (SCL, SDA) for I C
Logic-High
VIH
1.5
--
--
Logic-Low
VIL
--
--
0.4
Input Leakage Current
IINLEAK
−1
--
1
μA
Open Drain Low for SDA
VODLO
--
--
0.4
V
Logic Input
Voltage
ISINK = 1mA
V
Protection
Thermal Regulation
Thermal Shutdown
Temperature
Thermal Shutdown Hysteresis
TREG
--
125
--
°C
TSD
--
155
--
°C
ΔT SD
--
20
--
°C
OVP SET Voltage
VOVP
6.25
6.5
6.75
V
OVP Hysteresis
VOVP_Hys
--
100
--
mV
VDET
VDET
VDET Falling
0.98
1
1.02
V
BATON
Output Short-Circuit Detection
Threshold
VP
VBATON
VTEMPIN Rising
93
95
97
%VP
VSHORT
VBAT − VSYS
--
300
--
mV
VP (internal used only)
VP
VIN = 5V or VIN = 0V (VEXT >
4V), IVP = 1mA, TA = 0 to 85°C
3.2
3.3
3.4
V
RNTC = 100kΩ ( 0, 10, 45, 58°C)
NCP15WF104F03RC
Too Cold temperature Fault
Threshold voltage
VToo_Cold
Cold temperature Fault
Threshold voltage
VCold
Hot temperature Fault
Threshold voltage
VHot
Too Hot temperature Fault
Threshold voltage
VToo_Hot
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
VIN Rising
Rising Threshold
--
78
--
Hysteresis
--
1
--
Rising Threshold
--
67.5
--
Hysteresis
--
1
--
Falling Threshold
--
29
--
Hysteresis
--
1.5
--
Falling Threshold
--
19.5
--
Hysteresis
--
1.5
--
%VP
%VP
%VP
%VP
is a registered trademark of Richtek Technology Corporation.
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7
RT9528
Parameter
Symbol
Test Conditions
Min
Typ
Max
Rising Threshold
--
73
--
Hysteresis
--
1
--
Rising Threshold
--
64
--
Hysteresis
--
1
--
Falling Threshold
--
33
--
Hysteresis
--
1.5
--
Falling Threshold
--
24.5
--
Hysteresis
--
1.5
--
Unit
RNTC = 10kΩ ( 0, 10, 45, 58°C) NCP15XH103F03RC
Too Cold temperature
Fault Threshold Voltage
VToo_Cold
Cold temperature Fault
Threshold Voltage
VCold
Hot temperature Fault
Threshold Voltage
VHot
Too Hot temperature
Fault Threshold Voltage
VToo_Hot
%VP
%VP
%VP
%VP
USB/ Audio/ Video Switches and Charger Detect
Internal Switch Supplies
VSWPOS
--
3
--
V
Internal Switch Supplies
VSWNEG
--
−2
--
V
VBAT UVLO
VBAT_UVLO
1.3
1.8
2.3
V
--
5
10
VIN Supply Current by
Suspend
IVIN_USUS
VBAT = 4.2V, VIN = 0V, CP_EN = 0,
SDA = SCL = 0V
VBAT = 4.2V, VIN = 0V, CP_EN = 1,
SDA = SCL = 0V
VIN = 5V, VBAT = 0V, CP_EN = 1,
USUS = 1, LDO_TS = 0, TS = 0
VDP_SRC Voltage
VDP_SRC
With IDAT_SRC = 0 to 250μA
0.5
--
0.7
V
VDM_SRC Voltage
VDM_SRC
With IDAT_SRC = 0 to 250μA
0.5
--
0.7
V
VDAT_REF Voltage
VDAT_REF
0.25
--
0.4
V
VLGC Voltage
VLGC
0.8
--
2
V
IDM_SINK Current
IDM_SINK
VCOMN = 0.6V
50
--
150
μA
IDP_SINK Current
IDP_SINK
VCOMP = 0.6V
50
--
150
μA
RDM_DWN
RDM_DWN
14.25
--
24.8
kΩ
IDP_SRC
IDP_SRC
VCOMP = 0.8V
1
--
13
μA
VCOMP_DCD
VCOMP_DCD In DCD flow, VCOMP = Float
2
--
--
V
CP_EN = 0
0
--
VSWPOS
CP_EN = 1
VSWNEG
--
VSWPOS
IVBAT
VBAT Supply Current
IVBAT2
μA
--
30
--
--
--
300
μA
USB Analog Switch (DN1, DP2)
V
Analog Signal Range
VDN1, VDP2
On-Resistance
RONUSB
VIN = 5V, VBAT = 3V, CP_EN = 1,
ICOM = 10mA, VCOM = 0V to 3V
--
4
--
Ω
On-Resistance Match
Between Channels
ΔRONUSB
VIN = 5V, VBAT = 3V, CP_EN = 1,
ICOM = 10mA, VCOM = 400mV
--
0.5
--
Ω
Off Leakage Current
IUSB(OFF)
VIN = 5V, VBAT = 4.2V, Switch
open, VDN1 or VDP2 = 0.3V, 2.5V,
VCOM = 2.5V, 0.3V
−360
--
360
nA
On Leakage Current
IUSB(ON)
VIN = 5V, VBAT = 4.2V,Switch
closed, VDN1 or VDP2 = 0.3V, 2.5V,
VCOM and VAUD = Float
−360
--
360
nA
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
CP_EN = 0
0
--
VSWPOS
CP_EN = 1
VSWNEG
--
VSWPOS
Ω
--
0.2
--
Ω
--
1.5
--
Ω
−360
--
360
nA
−360
--
360
nA
Audio Analog Switch (AUD1, AUD2)
Analog Signal Range
VAUDIO
On-Resistance Match
Between Channels
ΔRDS(ON)A
On-Resistance Flatness
RFLATA
Off Leakage Current
I LA(OFF)
On Leakage Current
I LA(ON)
Shunt Resistor
RSHUNT
30
100
200
Ω
I C Max Clock
FI2CCLK
--
--
400
kHz
CP_EN delay time
t CP_EN
Not production tested
--
--
1
ms
Analog Switch Turn On
Time
t ON
I C Stop to Switch On, RL = 32Ω
--
--
1
ms
Analog Switch Turn Off
Time
t Off
I C Stop to Switch Off, RL = 32Ω
--
--
1
ms
tD
RL = 32Ω
>0
--
--
μs
VIN = 0V, VBAT = 3V, CP_EN = 1,
I COM = 10mA, VCOM = 0V
VIN = 0V, VBAT = 3V, CP_EN = 1,
I COM = 10mA, VCOM = −2 to 2V
VIN = 0V, VBAT = 4.2V, Switch
open, VAUD = −0.5V, 0.5V,
VCOM = −0.5 to 0.5V
VIN = 0V, VBAT = 4.2V, Switch
closed, VAUD = −2V, 2V, VCOM
and VDX = Float
Dynamic
2
2
2
Break-Before-Make
Delay Time
Data Contact Detect
Debounce
DCD Time-OUT
t DCD_DBNC
20
--
40
ms
t DCD_TO
300
--
900
ms
VDAT_SRC ON Time
t DP_SRC_ON
40
--
--
ms
Off-Isolation(DN, DP)
VISO
--
TBD
--
dB
Off-Isolation(AUDIO1/2)
VISO
--
TBD
--
dB
Cross-talk
VCT
--
−11
0
--
dB
Total Harmonic
Distortion for Audio
THD
--
0.1
--
%
RL = 32Ω, f = 20kHz,
VCOM = 2Vp-p,
RL = 32Ω, f = 20kHz,
VCOM = 0.5Vp-p,
RL = 32Ω, f = 20kHz,
VCOM = 1VRMS
F = 20Hz to 20kHz,
VCOM = 2Vp-p, RL = 32Ω,
DC bias = 0
Capacitance (Note 2)
DP/Audio2 , DN/Audio1
ON Capacitance
CON
(DP/Audio2,
DN/Audio1)
USB on, f = 240MHz
--
4.5
--
pF
Audio on, f = 1Mhz
--
9
--
pF
USB Input source OFF
Capacitance
COFF(DP/DN)
f = 1MHz
--
1.5
--
pF
Audio(Audio2/Audio1)
COFF
(Audio2/Audio1)
f = 1MHz
--
3
--
pF
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
9
RT9528
Note 1. Stresses beyond those listed “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 2. Guaranteed by design.
Note 3. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. 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 © 2013 Richtek Technology Corporation. All rights reserved.
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is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
Typical Operating Characteristics
VIN = 5V, unless otherwise specified.
Floating
Standard Downstream Port
DCD and Primary Detect
DCD and Primary Detect
VIN
(5V/Div)
D+
(1V/Div)
VIN
(5V/Div)
D+
(2V/Div)
D(1V/Div)
D(1V/Div)
WKUP
(5V/Div)
WKUP
(5V/Div)
PRECHGEN = H, D+ and D- 15k to GND
PRECHGEN = H, D+ and D- Floating
Time (100ms/Div)
Time (100ms/Div)
Dedicated Charging Port
Dedicated Charging Port
DCD and Primary Detect
Secondary Detect
VIN
(5V/Div)
VIN
(5V/Div)
D+
(1V/Div)
D(1V/Div)
D+
(1V/Div)
D(1V/Div)
WKUP
(5V/Div)
WKUP
(5V/Div)
PRECHGEN = H, D+ and D- Short
PRECHGEN = H, D+ and D- Short
Time (100ms/Div)
Time (100ms/Div)
In The Dead Battery Flow
Finish Dead Battery Flow
VIN
(10V/Div)
VIN
(10V/Div)
I IN
(100mA/Div)
I IN
(100mA/Div)
Battery TS pin connect to TEMPIN pin
Battery TS pin connect to TEMPIN pin
D+
(2V/Div)
D+
(2V/Div)
WKUP
(5V/Div)
WKUP
(5V/Div)
VDET
(1V/Div)
VBAT = Real Battery, VDET = 0.9V
PRECHGEN = L, D+ and D- 15k to GND
Time (250ms/Div)
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
VDET
(1V/Div)
VBAT = Real Battery, VDET = 1.1V
PRECHGEN = L, D+ and D- 15k to GND
Time (250ms/Div)
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
RT9528
Standard 500mA Mode
Standard USUS
USB Flow
USB Flow
VIN
(5V/Div)
V SYS
(5V/Div)
VIN
(5V/Div)
V SYS
(5V/Div)
VDET
(1V/Div)
I IN
(500mA/Div)
VDET
(1V/Div)
I IN
(500mA/Div)
D+ and D- Floating
PRECHGEN = H, VDET = 0.9V, use the electronic
load and charge the maximum current in the VSYS
Charge the maximum current in the VSYS
D+ and D- Floating
PRECHGEN = H, VDET = 1.1V, use the electronic
load and charge the maximum current in the VSYS
Time (500ms/Div)
Time (500ms/Div)
Dedicated Charging Port
Charge on/Off Control by I2C
USB Flow
VSCL
(5V/Div)
V CHG
(5V/Div)
VIN
(5V/Div)
V SYS
(5V/Div)
I IN
(1A/Div)
VBAT
(5V/Div)
PRECHGEN = H,D+ and D- Short
use the electronic load and charge
the maximum current in the VSYS
Charge the maximum current in the VSYS
IBAT
(500mA/Div)
VBAT = Real Battery, 500mA Mode
Time (500ms/Div)
Time (50ms/Div)
TEMPIN On/Off
VIN Removal
VTS
(1V/Div)
V CHG
(5V/Div)
VIN
(5V/Div)
V SYS
(5V/Div)
VBAT
(2V/Div)
VBAT
(2V/Div)
IBAT
(1A/Div)
IBAT
(500mA/Div)
VBAT = Real Battery, 500mA Mode
control VTEMPIN by function generator
Time (500ms/Div)
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
www.richtek.com
12
VBAT = Real Battery,
RSYS = 10Ω, 1.5A Mode
Time (10ms/Div)
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
VIN Over Voltage Protection
Battery with NTC Resistor Plug-In
VIN
(10V/Div)
V SYS
(5V/Div)
IBAT
(500mA/Div)
VBAT
(5V/Div)
VBAT
(5V/Div)
VIN
(5V/Div)
IBAT
(2A/Div)
VTS
(2V/Div)
VIN = 5V to 15V, VBAT = Real Battery,
RSYS = 10Ω, 1.5A Mode
VBAT = Real Battery, 500mA Mode
Time (500ms/Div)
Time (50ms/Div)
Battery with NTC Resistor Plug-Out
With Battery without NTC Resistor
IBAT
(500mA/Div)
IBAT
(500mA/Div)
VBAT
(5V/Div)
VBAT
(5V/Div)
VIN
(5V/Div)
VIN
(5V/Div)
VTS
(2V/Div)
VTS
(2V/Div)
VBAT = Real Battery, 500mA Mode
VBAT = Real Battery, 500mA mode
Time (250ms/Div)
Time (50ms/Div)
With NTC Resistor without Battery
VIN Exist then Negative Battery
IBAT
(500mA/Div)
IBAT
(500mA/Div)
VBAT
(5V/Div)
VIN
(5V/Div)
VIN
(5V/Div)
V SYS
(5V/Div)
VTS
(2V/Div)
I IN
(500mA/Div)
VBAT = Real Battery, 500mA Mode
Time (50ms/Div)
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
VBAT = Real Battery,
RSYS = 10Ω, 500mA Mode
Time (50ms/Div)
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
13
RT9528
Negative Battery then VIN Plug-In
The Temperature of Battery Status
Normal -> Too Cold (Voltage)
VBAT
(5V/Div)
VTS
(2V/Div)
VIN
(5V/Div)
V SYS
(5V/Div)
I IN
(500mA/Div)
VBAT = Real Battery,
RSYS = 10Ω, 500mA Mode
Auto_JA = 1, JA_CV0 = 1, 1.5A Mode
Time (25ms/Div)
The Temperature of Battery Status
The Temperature of Battery Status
Normal -> Cold -> Too Cold (Voltage)
Normal -> Too Cold (Current)
VTS
(2V/Div)
VBAT = Real Battery,
Auto_JA = 1, JA_CV0 = 0, 1.5A Mode
IBAT
(500mA/Div)
VBAT = Real Battery
Auto_JA = 1, JA_CC0 = 1, 1.5AMode
Time (25ms/Div)
Time (25ms/Div)
The Temperature of Battery Status
The Temperature of Battery Status
Normal -> Cold -> Too Cold (Current)
Normal -> Too Hot (Voltage)
VTS
(1V/Div)
VTS
(2V/Div)
IBAT
(500mA/Div)
VBAT = Real Battery
Time (50ms/Div)
VTS
(2V/Div)
VBAT
(2V/Div)
VBAT
(2V/Div)
VBAT = Real Battery
Auto_JA = 1, JA_CC0 = 0, 1.5A Mode
Time (25ms/Div)
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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14
VBAT
(2V/Div)
VBAT = Real Battery
Auto_JA = 1, JA_CV1 = 1, 1.5A Mode
Time (250ms/Div)
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
The Temperature of Battery Status
The Temperature of Battery Status
Normal -> Hot -> Too Hot (Voltage)
VTS
(1V/Div)
VBAT
(2V/Div)
Normal -> Too Hot (Current)
VTS
(1V/Div)
VBAT = Real Battery
Auto_JA = 1, JA_CV1 = 0, 1.5A Mode
IBAT
(500mA/Div)
VBAT = Real Battery
Auto_JA = 1, JA_CC1 = 1, 1.5A Mode
Time (250ms/Div)
Time (250ms/Div)
The Temperature of Battery Status
Interrupt Happen
Normal -> Hot -> Too Hot (Current)
Active Low
VTS
(2V/Div)
VTS
(1V/Div)
INT
(5V/Div)
VBAT
(5V/Div)
IBAT
(500mA/Div)
IBAT
(500mA/Div)
VBAT = Real Battery,
Auto_JA = 1, JA_CC1 = 0, 1.5A Mode
VTS
(2V/Div)
VBAT = Real Battery, 500mA Mode, ICHG = 600mA
Time (250ms/Div)
Time (10ms/Div)
Interrupt Release
Interrupt Happen
Active Low
Active High
VTS
(2V/Div)
INT
(5V/Div)
INT
(5V/Div)
VBAT
(5V/Div)
VBAT
(5V/Div)
VBAT = Real Battery, 500mA Mode, ICHG = 600mA
IBAT
(500mA/Div)
IBAT
(500mA/Div)
(If want to release the interrupt pin,
you just need to read 0x02)
Time (10ms/Div)
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
VBAT = Real Battery, 500mA Mode, ICHG = 600mA
Time (10ms/Div)
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
15
RT9528
TEST Pin Function
Interrupt Release
Active High
VTS
(2V/Div)
TEST
(5V/Div)
DP
(5V/Div)
DN
(5V/Div)
INT
(5V/Div)
VBAT
(5V/Div)
IBAT
(500mA/Div)
VBAT = Real Battery, 500mA Mode, ICHG = 600mA
I IN
(1A/Div)
(If want to release the interrupt pin,
you just need to read 0x02)
VBAT = Real Battery, 1.5A Mode
VCOMP and VCOMN = 2V
Time (500ms/Div)
Time (10ms/Div)
APPM
System Regulation Voltage vs. Temperature
4.50
System Regulation Voltage (V)
VBAT = Real Battery, 1.5A Mode
ISYS = 0A to 2A
VIN
V SYS
VBAT
I SYS
I IN
(1V/Div) /
(1A/Div)
IBAT
4.48
4.46
4.44
4.42
4.40
4.38
4.36
4.34
4.32
ISYS = 0.5A
4.30
Time (1ms/Div)
-50
-25
0
25
50
75
100
125
Temperature (°C)
OVP Threshold Voltage vs. Temperature
VIN - VSYS Dropout Voltage vs. Temperature
6.52
VIN-VSYS Dropout Voltage (mV)
430
6.50
Rising
OVP Voltage (V)
6.48
6.46
6.44
6.42
6.40
Falling
6.38
6.36
6.34
6.32
405
380
355
330
305
280
255
230
205
ISYS = 1A
180
-50
-25
0
25
50
75
100
Temperature (°C)
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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16
125
-50
-25
0
25
50
75
100
125
Temperature (°C)
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
VBAT - VSYS Dropout Voltage vs. Temperature
ICHG
500
I CHG Thermal Regulation (mA)
VBAT - VSYS Dropout Voltage (mV)
80
75
70
65
60
55
50
45
VBAT = 3.7V, ISYS = 1A, USUS = H
40
Thermal Regulation vs. Temperature
450
400
350
300
250
200
150
100
50
VBAT = Real Battery
0
-50
-25
0
25
50
75
100
125
-50
-25
0
50
75
100
125
Temperature (°C)
Temperature (°C)
Pre-charge Current vs. Battery Voltage
Battery Regulation Voltage vs. Temperature
70
4.30
Pre-charge Current (mA)
4.28
4.26
Battery Voltage (V)
25
4.24
4.22
4.20
4.18
4.16
4.14
4.12
60
50
40
30
20
10
VBAT = Real Battery
0
4.10
-50
-25
0
25
50
75
100
125
2
2.2
2.4
2.6
2.8
Temperature (°C)
Battery Voltage (V)
Fast-charge Current vs. Battery Voltage
Eye Patten
3
Fast-charge Current (mA)
800
750
700
650
600
550
500
450
400
3
3.2
3.4
3.6
3.8
4
4.2
Battery Voltage (V)
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
17
RT9528
I2C Register Information
Address : 1000101x
Address
0x00
Address
0x01
Address
0x02
Address
0x03
Address
0x04
Name
Bit7
Bit6
Bit5
Bit4
Bit3
Base_SET1
USUS
ISETL
ISETU
VSYS_set
Reserved
Reset Value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Name
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
TS
LDO_TS
TS_switch
ISET
NC
Auto_JA
Base_SET2 INT_OUT INT_EN
Bit2
Bit1
Bit0
CHG_EN Reserved Reserved
Reset Value
0
0
1
1
0
1
1
1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Name
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Battery
_absent
Time
_fault
VDET
_status
INT_status CHGDET DCD_T
PG2
Reset Value
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Read/Write
R
R
R
R
R
R
R
R
Name
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
OVP
UVLO
SLEEP
NC
Status1
DCPORT CHPORT
Termination TS_change
Pre_CHG Fast_CHG
Reset Value
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Read/Write
R
R
R
R
R
R
R
R
Name
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
BAT_NEG
TS_fault
Status2
TS_flag
Reserved Reserved Reserved
Reset Value
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Read/Write
R
R
R
R
R
R
R
R
Address
Name
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0x05
CTR1
JA_CV1
JA_CV0
VREG
Reset Value
1
0
0
0
1
1
0
1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address
Name
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0x06
CTR2
JA_CC1
JA_CC0
ICHG
IPRE_CHG
Reset Value
0
0
0
0
0
0
1
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address
Name
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0x07
CTR3
Itermi
VPRE
Time_out
Reset Value
0
0
1
1
1
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address
Name
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0x08
CTR4
RNTC Type
Too Cold
Cold
Reset Value
0
0
1
0
0
1
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
Address
0x09
Address
0x0a
Name
Bit7
Bit6
CTR5
CHG_IND
_DIS
I C_ctl
Reset Value
0
0
1
0
0
1
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Name
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
CP_EN
CP_AUD
CHG_TYP
USB
_CHGDET
Bast_SET3
Bit5
2
Bit4
Bit3
Bit2
Bit1
Hot
COMP
COMN
Bit0
Too Hot
Reset Value
1
1
1
1
0
0
0
1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
I2C Table (Detail)
Base_SET1
Address
Name
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0x00
Base_SET1
USUS
ISETL
ISETU
VSYS_set
Reserved
CHG_EN
Reserved
Reserved
Reset Value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
USUS
ISETL
ISETU
VSYS_set
CHG_EN
VIN Suspend Control. Turn off M1 LDO and charger function
0 : Disable Suspend function. M1 LDO turn on
1 : Enable Suspend function. M1 LDO turn off
VIN Current Limit Control.
0 : See ISETU set
1 : 1.5A current limit
VIN Current Limit Control
0 : 95mA current limit
1 : 475mA current limit
SYS Voltage regulation control
0 : VSYS = 4.4V
1 : VSYS = 5.5V
Charger enable control
0 : Disable charger function
1 : Enable charger function
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
19
RT9528
Base_SET2
Address
Name
Bit7
Bit6
Bit5
0x01
Base_SET2
INT_OUT
INT_EN
TS
Reset Value
0
0
1
1
Read/Write
R/W
R/W
R/W
R/W
INT_OUT
INT_EN
TS
LDO_TS
TS_switch
ISET
Auto_JA
Bit3
Bit2
Bit1
Bit0
ISET
NC
Auto_JA
0
1
1
1
R/W
R/W
R/W
R/W
LDO_TS TS_switch
This bit sets the interrupt polarity
0 : Active low
1 : Active High
Enables interrupt generation. When set to disabled, it will mask INT pin out.
If INT_OUT = 0 and INT_EN = 0, INT pin is high impedance.
If INT_OUT = 1 and INT_EN = 0, INT pin is low.
0 : Disable Interrupt
1 : Enable Interrupt
Thermal Sense function and check battery absent function
0 : Disable TS function and check battery absent function
1 : Enable TS function and check battery absent function
The LDO for Thermal Sense
0 : Disable LDO_TS
1 : Enable LDO_TS
The switch between TEMPIN and TEMPOUT
0 : Open
1 : Short
SET charge current ( If Auto_JA = 1 , ISET can not control charge current)
0 : Half of charge current
1 : Full of charge current
Auto control charge current and voltage by battery temperature
0 : Disable
1 : Enable
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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Bit4
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
INT_Status
Address
0x02
Name
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
INT_status CHGDET DCD_T
PG2
Termination
TS
_change
Battery
_absent
Time_fault
VDET
_status
Reset Value
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Read/Write
R
R
R
R
R
R
R
R
CHGDET
DCD_T
PG2
Termination
TS_change
Battery_absent
Time_fault
VDET_status
Bit7
Bit6
Output of USB Charger detection comparator. This bit will set to one if COMP >
VDAT_REF for longer than 20ms. Any change in this bit triggers an interrupt.
0 : COMN < VDAT_REF or COMN > VLGC (High-current charger not detected)
1 : VLGC > COMN > VDAT_REF (High-current charger detected
Data Contact Detect Time Wait. (Interrupt generated for 0 to 1 transition)
0 : Data Contact Detect timer not expired
1 : Data Contact Detect running for >512ms
PG2_status bit. Any change in this bit triggers an interrupt.
0 : No power good.
1 : Power good ( no OVP & no UVLO & no SLEEP)
Charge termination bit (latch type, one time, use EN or USUS re-toggle reset)
Any change in this bit triggers an interrupt.
0 : Normal
1 : Termination
TS change bit. (Interrupt generated for 0 to 1 transition)
TS_change = 1 triggers an interrupt. After 0x02 is read, TS_change will be set to 0.
0 : Normal
1 : When 0x04 register bit5 to bit7 (TS_flag) status have some changes.
Battery absent bit. Any change in this bit triggers an interrupt.
0 : Normal
1 : Battery absent happen
Charger timer fault bit. Any change in this bit triggers an interrupt.
0 : Normal
1 : Time Fault
VDET state bit. Any change in this bit triggers an interrupt.
0 : VDET < 1V
1 : VDET > 1V
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
is a registered trademark of Richtek Technology Corporation.
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21
RT9528
I2C_Status1
Address
Name
0x03
Status1
Bit7
Bit6
DCPORT CHPORT
Bit5
Bit4
Bit3
Bit2
OVP
UVLO
SLEEP
NC
Bit1
Bit0
Pre_CHG Fast_CHG
Reset Value
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Read/Write
R
R
R
R
R
R
R
R
DCPORT
CHPORT
OVP
UVLO
SLEEP
Pre_CHG
Fast_CHG
Indicates if a Dedicated USB Charger is Connected
0 : No dedicated Charger
1 : Dedicated Charger Detected
Indicates if a High Current Host/Hub is Connected
0 : No dedicated HCHH
1 : HCHH Detected
OVP_state bit
0 : VIN Voltage is lower than OVP Threshold Voltage
1 : VIN Voltage is higher than OVP Threshold Voltage
UVLO_state bit
0 : VIN Voltage is higher than UVLO Threshold Voltage
1 : VIN Voltage is lower than UVLO Threshold Voltage
SLEEP_state bit
0 : No sleep , (VIN − 100mV) > VBAT
1 : Sleep state, (VIN − 50mV) < VBAT
Pre-charge status. If CHG_EN is disabled, Pre_CHG = 0
0 : Not Pre-charge
1 : Pre-charge
Fast-charge status. If CHG_EN is disabled, Fast_CHG = 0
0 : Not Fast-charge
1 : Fast-charge
I2C_Status2
Address
Name
0x04
Status2
Bit7
Bit6
Bit5
TS_flag
Bit4
Bit3
Bit2
Bit1
Bit0
BAT_NEG
TS_fault
Reserved
Reserved
Reserved
Reset Value
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Read/Write
R
R
R
R
R
R
R
R
TS_flag
BAT_NEG
TS_fault
TS_flag state bit
000 : < (Too Cold)
001 : (Too Cold) ~ (Cold)
010 : Normal
011 : (Hot) ~ (Too Hot)
100 : > (Too Hot)
101 ~ 111 : Reserved
Note : Let (Too Cold) < (Cold) < (Hot) < (Too Hot)
Battery negative status bit
0 : Normal
1 : BAT pin is negative voltage
TS_fault
0 : Normal
1 : Too Cold or Too Hot
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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is a registered trademark of Richtek Technology Corporation.
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RT9528
I2C_CTR1
Address
Name
0x05
CTR1
Reset Value
Read/Write
VREG
JA_CV1
JA_CV0
Bit7
Bit6
Bit5
Bit3
Bit2
VREG
1
0
0
0
1
1
Bit1
Bit0
JA_CV1
JA_CV0
0
1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Setting of Battery Regulation Voltage (Range : 3.5V to 4.26V, Default = 4.2V) If Auto_JA =
1, these bits will not control.
000000
3.50V
010000
3.82V
100000
4.14V
110000
4.26V
000001
3.52V
010001
3.84V
100001
4.16V
110001
4.26V
000010
3.54V
010010
3.86V
100010
4.18V
110010
4.26V
000011
3.56V
010011
3.88V
100011
4.20V
110011
4.26V
000100
3.58V
010100
3.90V
100100
4.22V
110100
4.26V
000101
3.60V
010101
3.92V
100101
4.24V
110101
4.26V
000110
3.62V
010110
3.94V
100110
4.26V
110110
4.26V
000111
3.64V
010111
3.96V
100111
4.26V
110111
4.26V
001000
3.66V
011000
3.98V
101000
4.26V
111000
4.26V
001001
3.68V
011001
4.00V
101001
4.26V
111001
4.26V
001010
3.70V
011010
4.02V
101010
4.26V
111010
4.26V
001011
3.72V
011011
4.04V
101011
4.26V
111011
4.26V
001100
3.74V
011100
4.06V
101100
4.26V
111100
4.26V
001101
3.76V
011101
4.08V
101101
4.26V
111101
4.26V
001110
3.78V
011110
4.10V
101110
4.26V
111110
4.26V
111111
4.26V
001111
3.80V
011111
4.12V
101111
4.26V
If Auto_JA = 1, JA_CV1 controls charge voltage, Hot ~ Too Hot
0 : Hot ~ Too Hot : 4.06V
1 : Hot ~ Too Hot : 4.2V
If Auto_JA = 1, JA_CV0 controls charge voltage, Cold ~ Too Cold
0 : Cold ~ Too Cold : 4.06V
1: Cold ~ Too Cold : 4.2V
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
Bit4
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23
RT9528
I2C_CTR2
Address
Name
0x06
CTR2
Bit7
Bit6
Bit5
Bit4
ICHG
Bit3
Bit2
IPRE_CHG
Bit1
Bit0
JA_CC1
JA_CC0
Reset
Value
0
0
0
0
0
0
1
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Setting of Fast Charge Current (Range : 66mA to 1000mA, Default = 66mA)
ICHG
IPre_CHG
JA_CC1
JA_CC0
0000
66mA
0001
100mA
0010
200mA
0011
250mA
0100
300mA
0101
350mA
0110
400mA
0111
450mA
1000
500mA
1001
600mA
1010
700mA
1011
800mA
1100
900mA
1101
1000mA
1110
1100mA
1111
1200mA
Setting of Pre-charge Current
00
40mA
01
60mA
10
80mA
11
100mA
If Auto_JA = 1, JA_CC1 controls the current , Hot ~ Too Hot
0 : Hot ~ Too Hot : 50% charge current
1 : Hot ~ Too Hot : 100% charge current
If Auto_JA = 1, JA_CC0 controls the current , Cold ~ Too Cold
0 : Cold ~ Too Cold : 50% charge current
1 : Cold ~ Too Cold : 100% charge current
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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(Range : 40 to100mA, Default = 40mA)
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
I2C_CTR3
Address
Name
0x07
CTR3
Bit7
Bit6
Bit5
Bit4
Bit3
Itermi
Bit2
Bit1
VPRE
Bit0
Time_out
Reset Value
0
0
1
1
1
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Setting of charger termination Ratio (Range : 5 to 35%, Default = 10%)
Itermi
000
5%
001
10%
010
15%
011
20%
100
25%
101
35%
110
Reserved
111
disable
Setting of Pre to Fast charge (Range : 2.4 to 3.1V, Default = 3V)
VPre to Fast
000
2.4V
001
2.5V
010
2.6V
011
2.7V
100
2.8V
101
2.9V
110
3.0V
111
3.1V
Setting of Time out Pre/Fast (Range : 30min/240min to 60min/480min, Default =
30min/240min )
Time-out
00
Pre / Fast = 30min / 240min
01
Pre / Fast= 45min / 360min
10
Pre / Fast = 60min / 480min
11
Disable
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
is a registered trademark of Richtek Technology Corporation.
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25
RT9528
I2C_CTR4
Address
Name
0x08
CTR4
Bit7
Bit6
Bit5
RNTC Type
Bit4
Bit3
Bit2
Too Cold
Bit1
Bit0
Cold
Reset Value
0
0
1
0
0
1
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RNTC Type
Too Cold
Cold
RNTC Type set
00 : See SETNTC Pin
01 : RNTC = 100kΩ
10 : RNTC = 10kΩ
11 : Reserved( same as 00)
Setting of charger Too Cold Temperature
000 : −10°C
001 : −10°C
010 : −10°C
011 : −5°C
100 : 0°C
101 : 5°C
110 : 10°C
111 : 15°C
Setting of charger Cold Temperature
000 : −10°C
001 : −5°C
010 : 0°C
011 : 5°C
100 : 10°C
101 : 15°C
110 : 20°C
111 : 25°C
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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26
(Range : −10 to 15°C, Default = 0°C)
(Range : −10 to 25°C, Default = 10°C)
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
I2C_CTR5
Address
Name
Bit7
Bit6
0x09
CTR5
CHG_IND_DIS
I C_ctl
Reset
Value
0
0
1
0
0
1
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
CHG_IND_DIS
2
I C_ctl
Hot
Too Hot
Bit4
2
Bit3
Bit2
Hot
Bit1
Bit0
Too Hot
CHG pin control :
0 : CHG pin is normal. (Default)
1 : CHG pin is high impedance
When VIN is no power force RT9528 wake-up.
0 : Disable
1 : Enable
Setting of charger Hot Temperature
000 : 25°C
001 : 30°C
010 : 35°C
011 : 40°C
100 : 45°C
101 : 50°C
110 : 55°C
111 : 58°C
(Range : 25 to 58°C, Default = 45°C)
Setting of charger Too Hot Temperature
000 : 40°C
001 : 45°C
010 : 50°C
011 : 55°C
100 : 58°C
101 : 58°C
110 : 58°C
111 : 58°C
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
Bit5
(Range : 40 to 58°C, Default = 58°C)
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
27
RT9528
Base_SET3
Address
Name
0x0a
Base_SET3
Bit7
Bit6
Bit5
COMP
Bit4
COMN
Bit3
CP_EN
Bit2
Bit1
Bit0
CP_AUD CHG_TYP USB_CHGDET
Reset Value
1
1
1
1
0
0
0
1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
COMP
COMN
CP_EN
CP_AUD
CHG_TYP
USB_CHGDET
The bit sets the position of the mux switch connected to COMP
00 : COMP Connected to DP
01 : COMP Connected to AUDIO2
10 : High Impedance
11 : High Impedance
The bit sets the position of the mux switch connected to COMN
00 : COMN Connected to DN
01 : COMN Connected to AUDIO1
10 : High Impedance
11 : High Impedance
Enables the charge pump required for analog switch operation. Set to 1 when any
signal is passed
through the switch. When set to disable, there must be no signal connected to an audio
input which
goes below ground.
0 : Disabled
1 : Enabled
The bit sets the position of the click/pop resistor on both AUDIO1 and AUDIO2
0 : Disabled
1 : Enabled
Enables Charger Type Detection. Set this bit to determine between Dedicated USB
charger and High
Current Host/Hub Chargers.
0 : Disabled
1 : Enabled
Enables the USB Charger Detection.
0 : Disabled
1 : Enabled
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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28
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
Application Information
JA Initial State
VDET
If VIN power is good, 0x02 VDET_status works normally.
If Only Battery plugs in, 0x02 VDET_status = 1
VREG
= 4.2V
VREG
= 4.06V
WKUP
WKUP keeps Hi-Z without VIN.
ICHG
= 50%
0
ICHG
= 100%
10
45
60
T(°C)
Interrupt Chart flow
Any State
INT_OUT = 0
INT_EN = 1
No
Check INT = 0
Yes
Any State
INT_OUT = 1
INT_EN = 1
No
Check INT = Hi-Z
Yes
Interrupt Happens
Interrupt Happens
Read
Resistor 0x02
Read
Resistor 0x02
Clear Interrupt
Set INT = Hi-Z
Clear Interrupt
Set INT = 0
Note1 :
If Set INT_EN = 0, it just mask the INT signal.
When INT_EN = 1, interrupt still happens.
Note 2 :
If INT_OUT = 0 and INT_EN = 0, INT pin is high impedance.
If INT_OUT = 1 and INT_EN = 0, INT pin is low.
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
29
RT9528
Charger Initial Flow Chart
Initial state
100mA mode
USUS = 0
CHGEN = 0
ISETL = 0
ISETU = 0
USB_CHGDET = 1
CHG_TYPE = 0
No
Keep D+ =
VDP_SRC
& Start Timer
Time >
TSVLD_CON_WKB
Yes
No
Check
Battery
Connect
UVLO<VIN<OVP
& VIN-VBAT>50mV
& 30msec
Deglitch Time
Time-out
Disable 66mA
charge current
VIN re-plug to reset
this function.
WKUP will not go
low.
Yes
Once VIN > UVLO,
Reset all register
Yes
No
Data contact
detect
D+ = VDP_SRC
Go low
> 512ms
Yes
Write 0x02
DCD_T = 1
Yes
VDET >1
Yes
No
Data contact OK
No
Dead / Weak
Battery
Good
Battery
D+ = VDP_SRC
100mA mode
USUS = 0
CHGEN = 1
ISETL = 0
ISETU = 0
ICHG = 66mA
Set USUS mode
USUS = 1
CHGEN = 0
ISETL = 0
ISETU = 0
D- > VDAT_REF
& D- < VLGC
Yes
No
Standard USB Port
Yes
RT9528 will disable
PRECHGEN function.
Internal PRECHGEN=H
System is
Wake-up
PRECHGE = L
No
Yes
After 64µs
WKUP
= H to L
Dedicated or
High Current
Host/Hub
Set USUS mode
USUS = 1
CHGEN = 0
ISETL = 0
ISETU = 0
After 1sec
D+ = VDP_SRC
Go low
VDET > 1
No
Set 500mA mode
USUS = 0
CHGEN = 0
ISETL = 0
ISETU = 1
Set 1.5A mode
USUS = 0
CHGEN = 0
ISETL = 1
ISETU = 0
RT9528 will disable
PRECHGEN function.
Internal PRECHGEN = H
After 64µs
WKUP
= H to L
Set CHG_TYP
=1
Wait 300ms
Read 0x03
Status1
DCPORT = 1
Set charger
2
Condition by I C
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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30
Dedicated
Charger
Detected
Yes
High Current
Host/Hub
Detected
No
CHPORT = 1
System is
Wake-up
Yes
Reset
CHG_TYP = 0
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
After WKUP from H go L, system can do DCD and CHGDET again as below
Set Charger
2
Condition by I C
Read 0x02
DCD_T = 1
Set
USB_CHGDET = 1
0
1
Data Contact Detect
No
Data Contact OK
>512ms
Yes
Yes
Write 0x02
DCD_T = 1
D+ = VDP_SRC
D- > VDAT_REF
& D- < VLGC
Yes
Dedicated or
High current
Host/Hub
0x02 CHGDET = 1
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
No
Standard USB port
0x02 CHGDET = 0
is a registered trademark of Richtek Technology Corporation.
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31
RT9528
NTC Ratio
NCP15WF104F03RC_100kΩ
NCP15XH103F03RC_10kΩ
T (°C)
R1 (kΩ)
RNTC (kΩ)
Ratio (%)
T (°C)
R1 (kΩ)
RNTC (kΩ)
Ratio (%)
−10
100
528.988
84
−10
10
42.5062
81
−5
100
471.632
82.5
−5
10
33.8922
77
0
100
357.012
78
0
10
27.2186
73
5
100
272.5
73
5
10
22.0211
69
10
100
209.71
67.5
10
10
17.9255
64
15
100
162.651
62
15
10
14.6735
59.5
20
100
127.08
56
20
10
12.0805
54.5
25
100
100
50
25
10
10
50
30
100
79.222
44
30
10
8.3145
45.5
35
100
63.167
38.5
35
10
6.9479
41
40
100
50.677
33.5
40
10
5.8336
37
45
100
40.904
29
45
10
4.9169
33
50
100
33.195
25
50
10
4.1609
29.5
55
100
27.091
21.5
55
10
3.535
26
58
100
24.1708
19.5
58
10
3.22258
24.5
I2C Write and Read
Write
RT9528 1 support byte writing as below. If you want to write another data byte, you must follow as below again.
z
Writing 1 Byte of Data to RT
Acknowledge from RT
S
Slave Address
0 A
Acknowledge from RT
Register Address
Acknowledge from RT
A
R/W
Data Byte
A P
1-Byte
Read
RT9528 1 support byte reading as below. If you want to read another data byte, you must follow as below again.
z
Reading 1 Byte of Data from RT
Acknowledge from RT
S
Slave Address
R/W
0 A
Acknowledge from RT
Register Address
Repeated Start
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32
A Sr
Acknowledge from RT
Slave Address
R/W
1 A
Non-Acknowledge from Master
Data Byte
A P
1-Byte
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
INT Release
z INT release , INT_OUT = 0 and INT_EN = 1
Acknowledge from RT
S
Slave Address
Acknowledge from RT
0 A
Register Address
R/W
Acknowledge from RT
A Sr
Slave Address
Repeated Start
1 A
R/W
Non-Acknowledge from Master
Data Byte
A P
1-Byte
INT
INT is released after reading 0x02
0x02 INT happens
Data Pin Contact Timing
DCD Timing, Contact After Start
VIN
(Check if data contact) IDP_SRC
RDM_DWN
D+
on
off
VLGC_HI
VLGC_Low
Data pins
make contact
TDCD_DBNC
DCD Timing, Contact Before Start
VIN
(Check if data contact) IDP_SRC
RDM_DWN
D+
on
off
VLGC_HI
VLGC_Low
TDCD_DBNC
Data pins
make contact
DCD Timing, non Contact
VIN
(Check if data contact) IDP_SRC
RDM_DWN
D+
TDCD_TIMEOUT
on
off
VLGC_HI
VLGC_Low
Data pins do not
make contact, or
are pulled high
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
is a registered trademark of Richtek Technology Corporation.
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33
RT9528
Waveform for PRECHGEN
PRECHGEN = H
VIN
(Check if data contact)
[Check (DCP/CDP) or
SDP]
IDP_SRC
RDM_DWN
Max : 512ms
on
off
VDP_SRC
IDM_SINK
30ms
on
off
DCP or CDP
192ms
CHGDET
SDP
64µs
WKUP
SDP : Standard Downstream Port
CDP : Charging Downstream Port
DCP : Dedicated Charging Port
PRECHGEN = L
VIN
(Check if data contact)
[Check (DCP/CDP) or
SDP
IDP_SRC
RDM_DWN
on
off
VDP_SRC
IDM_SINK
Max : 512ms
30ms
Max. 45mins
1s
on
off
DCP or CDP
192ms
CHGDET
SDP
64µs
WKUP
SDP : Standard Downstream Port
CDP : Charging Downstream Port
DCP : Dedicated Charging Port
ISET
(2) For pre-charge flow : (regardless of Auto-JA)
For dead battery flow or pre-charge flow, charge current
will not be half, even if 0x01 ISET = 0.
If 0x01 ISET = 1 (default)
Timeout = 1 x (I2C set), even if too cold or too hot.
2
For fast charge flow, if ISET = 1, charge current = 1 x (I C
set); if ISET = 0, charge current = 0.5 x (I2C set).
If 0x01 ISET = 0
Timeout = 1 x (I2C set), even if too cold or too hot.
Time-Out
(1) For dead battery flow : (regardless of Auto-JA)
If 0x01 ISET = 1 (default)
Timeout = 30min, even if too cold or too hot.
If 0x01 ISET = 0
Timeout = 30min, even if too cold or too hot.
During the timeout period, the CHG pin is flashed by 2Hz.
(3) For fast-charge flow :
(3_1) 0x01 Auto-JA = 0
If 0x01 ISET = 1 (default)
Timeout = 1 x (I2C set), even if too cold or too hot.
If 0x01 ISET = 0
During the timeout period, the CHG pin is high impedance.
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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34
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
Timeout = 2 x (I2C set), even if too cold or too hot.
USB Switch
(3_2) 0x01 Auto-JA = 1
If VIN is not good power (VIN > OVP, VIN < UNLO, or
VIN−VBA < 50mV), USB switch will be turned off even if
set 0x0a COMP = (0,0) COMN = (0,0).
The charge current is set according to 0x06 JA_CC1 and
JA_CC0 setting.
If Auto-JA makes charge current to be half for cold or hot
condition, Timeout = 2 x (I2C set), and timeout will be still
the same ( = 2 x (I2C set)) if too cold or too hot.
During the timeout period, the CHG pin is flashed by 2Hz.
CHG Indicator
In dead battery or normal charge flow, the following cases
make the CHG pin to be high impedance : no battery, too
hot too cold, 0x00 USUS = 1, 0x00 CHG_EN = 0, charge
termination, time-out in dead battery flow, 0x09
CHG_IND_DIS = 1, or 0x02 PG2 = 0 in normal charge
flow.
Battery absent function and TS function
If VIN plugs in, 0x01 TS = 1 and 0x01 LDO_TS = 1, battery
absent function and TS function will work normally.
If only battery plugs in, battery absent function and TS
function will not work due to battery leakage current
request (IBAT < 5μA). And 0x02 Battery absent = 1 even
if battery plugs in. 0x04 TS_flag [bit7, bit6, bit5] = [010]
even if battery temperature changes. If you need battery
absent function and TS function, you can set 0x09 I2C_ctl
= 1, VEXT pin > 3.8V, 0x01 TS = 1, and 0x01 LDO_TS =
1. However, these functions will sink current from battery.
If you want to suspend battery current, you can set 0x09
I2C_ctl = 0 and VEXT pin = 0V.
By the way, if VIN and battery plug in and 0x02 USUS = 1
or CHG_EN = 0, the 0x04 TS_fault bit will be set at 1.
After setting USUS = 0 and CHG_EN = 1, the 0x04
TS_fault bit can work normally. When 0x09 I2C_ctl = 1,
the 0x04 TS_fault bit will work normally even if USUS = 1
or CHG_EN = 0.
I2C Register Reset
If VIN plugs in, all I2C register will reset.
Thermal Considerations
For continuous operation, do not exceed absolute
maximum junction temperature. The maximum power
dissipation depends on the thermal resistance of the IC
package, PCB layout, rate of surrounding airflow, and
difference between junction and ambient temperature. The
maximum power dissipation can be calculated by the
following formula :
PD(MAX) = (TJ(MAX) − TA) / θJA
where TJ(MAX) is the maximum junction temperature, TA is
the ambient temperature, and θJA is the junction to ambient
thermal resistance.
For recommended operating condition specifications, the
maximum junction temperature is 125°C. The junction to
ambient thermal resistance, θJA, is layout dependent. For
WQFN-28L 4x4 package, the thermal resistance, θJA, is
52°C/W on a standard JEDEC 51-7 four-layer thermal test
board. The maximum power dissipation at TA = 25°C can
be calculated by the following formula :
PD(MAX) = (125°C − 25°C) / (52°C/W) = 1.923W for
WQFN-28L 4x4 package
The maximum power dissipation depends on the operating
ambient temperature for fixed T J(MAX) and thermal
resistance, θJA. The derating curve in Figure 1 allows the
designer to see the effect of rising ambient temperature
on the maximum power dissipation.
Upside Down Battery Function
If battery is inserted upside down, it causes that the voltage
of BAT pin is negative. RT9528 will disable charger function
until battery voltage is normal. If battery is inserted upside
down, 0x04 bit4 BAT_NEG will be 1.
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
DS9528-01 April 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
35
RT9528
Layout Considerations
Maximum Power Dissipation (W)
2.0
Four-Layer PCB
1.6
1.2
0.8
0.4
The RT9528 is a fully integrated low cost single cell Li-ion
battery charger ideal for portable applications. Careful PCB
layout is necessary. For best performance, place all
peripheral components as close to the IC as possible. A
short connection is highly recommended. The following
guidelines should be strictly followed when designing a
PCB layout for the RT9528.
`
Input and output capacitor should be placed as close to
the IC as possible and connected to ground plane. The
input trace on the PCB should be placed far away from
sensitive devices and shielded by the ground.
`
The GND and exposed pad should be connected to a
strong ground plane for heat sinking and noise protection.
0.0
0
25
50
75
100
125
Ambient Temperature (°C)
Figure 1. Derating Curve of Maximum Power Dissipation
` DN pin and DP pin should be placed as close to the USB
controller as possible. Distance of the DN/DP pin to USB
controller must be less than 25mm. A short wire is
recommended to prevent EMI and noise coupling.
Copyright © 2013 Richtek Technology Corporation. All rights reserved.
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36
`
The trace of DN pin and DP pin avoids using via for low
impedance of the transmission line.
`
The trace of DN pin and DP pin is as symmetrical as
possible to improve performance.
`
The trace of USB function avoids using cross line for
noise coupling.
is a registered trademark of Richtek Technology Corporation.
DS9528-01 April 2013
RT9528
Outline Dimension
D2
D
SEE DETAIL A
L
1
E
E2
e
A3
1
2
2
DETAIL A
Pin #1 ID and Tie Bar Mark Options
b
A
A1
1
Note : The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
0.700
0.800
0.028
0.031
A1
0.000
0.050
0.000
0.002
A3
0.175
0.250
0.007
0.010
b
0.150
0.250
0.006
0.010
D
3.900
4.100
0.154
0.161
D2
2.350
2.450
0.093
0.096
E
3.900
4.100
0.154
0.161
E2
2.350
2.450
0.093
0.096
e
L
0.400
0.350
0.016
0.450
0.014
0.018
W-Type 28L QFN 4x4 Package
Richtek Technology Corporation
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5526789
Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should
obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot
assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be
accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries.
DS9528-01 April 2013
www.richtek.com
37