Data Sheet

[AP2061AEC]
AP2061AEC
2.0A High-side LED Driver for Camera Flash with I2C
1. Genaral Description
The AP2061 is a white LED driver IC for camera flash applications of portable equipment. The device
integrates a current mode synchronous boost DC-DC converter and maximum 2A current sources. The internal
boost DC-DC converter integrates a switching FET and synchronous rectifier, and supports a small size
multilayer inductor with 4MHz switching frequency. The internal current sources allow for grounded cathode
connections for easier heat dissipation and simple LED arrangement. The AP2061 includes eight protections
that are LED thermal detection, inductor current limitation, input voltage detection, over voltage protection,
under voltage lock out, device thermal protection, LED open/short protection and output-ground short
protection to avoid significant system problems. Flash current, torch current, inductor limit current and flash
on-time is programmable through I2C interface. The AP2061 is housed in a small size package (16-pin CSP:
1.56mm x 1.56mm, 0.4mm pitch), saving much space on a system board.
2. Features












Power Supply Voltage:
VIN = 2.7V to 5.5V
LED Current:
Total ILED = 2.0A (max), ILED/ch = 1.0A/ch (max)
High-Side Current Source
High Efficiency
Switching Frequency:
Frequency= 4.0 MHz
— Support small size inductor
Automatically Selected Working Mode (DC-DCBypass)
Synchronization With RF power-Amplifier Pulse
Input Voltage Detection Function
I2C Function:
— Flash LED current setting
— Torch LED current setting
— Flashing on-time setting
— Current limit value setting
— LED thermal detection voltage setting
— Battery detection voltage setting
— Error read support
Protection Function:
— LED thermal detection
— Inductor current limit
— Input voltage detection
— Over voltage protection (OVP)
— Under voltage lock out (UVLO)
— Thermal shutdown
— LED open/short
— Output-ground short
Operation Temperature :
Ta: -30 to 85C
Package:
16-pin CSP (1.56 x 1.56mm, 0.4mm pitch)
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3. Table of Contents
1.
2.
3.
4.
5.
Genaral Description ........................................................................................................................................... 1
Features .............................................................................................................................................................. 1
Table of Contents ............................................................................................................................................... 2
Block Diagram ................................................................................................................................................... 3
Pin Configurations and Functions ...................................................................................................................... 4
■ Ordering Guide ................................................................................................................................................. 4
■ Pin Configurations ............................................................................................................................................ 4
■ Function ............................................................................................................................................................ 4
6. Absolute Maximum Ratings .............................................................................................................................. 5
7. Recommended Operating Conditions ................................................................................................................ 5
■ Thermal Properties ........................................................................................................................................... 5
8. DC Characteriistis .............................................................................................................................................. 6
9. Electrical Characteristics.................................................................................................................................... 6
10.
Digital Characteristics .................................................................................................................................... 7
■ Control Interface Timing .................................................................................................................................. 7
■ Timing Diagram ............................................................................................................................................... 7
11.
Functional Descriptions.................................................................................................................................. 8
■ Protection Function........................................................................................................................................... 8
■ LED Temperature Detection Function ............................................................................................................. 9
■ Recommend Sequence Examples ................................................................................................................... 10
■ Typical Performance Characteristics .............................................................................................................. 15
■ Serial Control Interface .................................................................................................................................. 17
12.
Register Map ................................................................................................................................................ 20
■ Register Map .................................................................................................................................................. 20
■ Register Definitions ........................................................................................................................................ 20
13.
Recommended External Circuits .................................................................................................................. 25
14.
Package ........................................................................................................................................................ 26
■ Outline Dimensions ........................................................................................................................................ 26
■ PCB Layout Example ..................................................................................................................................... 26
■ Marking .......................................................................................................................................................... 27
15.
Revise History .............................................................................................................................................. 28
IMPORTANT NOTICE .......................................................................................................................................... 29
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4. Block Diagram
SW1
SW2
VIN
OVP
UVLO
VOUT1
BULK
CONT
Cin
VOUT2
OSC
∑
Cout
CONT
PW
COMPARATO
M
R
VIN
Curre
ntLimi
t
Error Amp
DET
NTC
LED1
SCL
LED2
SDA
STROB
E
TXON
2
I C I/F
& Control
Current
& Control
TORCH
VSS
PGND
1
PGND
2
Figure 1. AP2061 Block Diagram
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5. Pin Configurations and Functions
■ Ordering Guide
AP2061AEC
Ta = -30 to 85°C
16-pin CSP
■ Pin Configurations
16-pin CSP (1.56mm x 1.56mm, 0.4mm pitch)
Top View
4
NTC
TORCH
LED2
LED1
3
SDA
TXON
VOUT
VOUT
2
SCL
STROBE
SW
SW
1
VIN
VSS
PGND
PGND
A
B
C
D
■ Function
No.
C3, D3
C2, D2
A1
C1, D1
B1
D4
C4
Pin Name
VOUT
SW
VIN
PGND
VSS
LED1
LED2
I/O
O
I
I
O
O
Function
Voltage Output
Connect this pin to a coil.
Connect this pin to a battery.
Power Ground
Analog Ground
LED Connect1
(This pin should be open when unused)
LED Connect2
(This pin should be open when unused)
LED Temperature Detection Pin
(connect to NTC thermistor)
A4
NTC
O
(This pin should be connected to ground when unused)
Synchronization Input Pin for RF Transmission Signal
B3
TXON
I
(This pin should be connected to ground when unused)
Pull-down resistor= 300kΩ @ typ
A2
SCL
I
I2C Clock Input Pin
A3
SDA
I/O I2C Data Input/output Pin
Flashing Control Signal Input Pin
B2
STROBE
I
(This pin should be connected to ground when unused)
Pull-down resistor= 300kΩ @ typ
Torching Control Signal Input Pin
B4
TORCH
I
(This pin should be connected to ground when unused)
Pull-down resistor= 300kΩ @ typ
Note 1. Both VOUT pins (No. C3 and D3) must be connected together.
Note 2. Both SW pins (No. C2 and D2) must be connected together.
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6. Absolute Maximum Ratings
(PGND=VSS=0V; (Note 3))
Parameter
Symbol
min
max
Unit
Input Voltage VIN pin (Vbatt)
VIN
-0.3
6.5
V
Input Voltage SW pin
VIN
-0.3
6.5
V
VIN+0.3
TXON, STROBE, SCL, SDA, TORCH pins
VMAX
-0.3
V
(Note 4)
LED Total Current
ILED
2
A
Junction Temperature
Tj
125
°C
Storage Temperature
TSTG
-55
150
°C
Note 3. All voltages are with respect to ground. PGND and VSS pins should be connected to the same ground.
Note 4. The maximum value is lower value between (VIN+0.3)V and 6.5V.
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is guaranteed at these extremes.
7. Recommended Operating Conditions
(PGND=VSS=0V; (Note 3))
Parameter
Input Voltage (VIN pin)
Operation Temperature
Symbol
VIN
Ta
min
2.7
-30
typ
3.7
25
max
5.5
85
Unit
V
°C
Note: When 4.7V < VIN < 5.5V, the AP2061 is able to perform normally in a condition that protection functions
will not work. However the analog characteristics cannot be guaranteed.
Recommend Example（in the case of using recommended parts）:Ta ≤ 50°C
Table 1. Recommend condition
LED Current
VIN pin Voltage
LED VF
1.3A
≥ 2.9V
≤ 4.2V @1.3A
1.6A
≥ 3.3V
≤ 4.2V @1.6A
2.0A
≥ 3.4V
≤ 3.8V @2.0A
2.0A
≥ 3.5V
≤ 4.0V @2.0A
2.0A
≥ 3.6V
≤ 4.2V @2.0A
Flashing time
≤ 300ms
≤ 300ms
≤ 100ms
≤ 100ms
≤ 100ms
■ Thermal Properties
Parameter
Symbol
typ
Thermal Junction-to-Ambient Resistance (Note 5)
65
JA
Note 5. This value is the result with a 4-layer FR-4 test board (40mm x 40mm x 1.6mm).
Ambient temperature is 25°C.
Thicknesses of copper layers: 18um / 35um / 35um / 18um.
Densities of copper layers: > 80% / 80% / 80% / 80%.
Unit
°C /W
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8. DC Characteriistis
(Ta= -30 to 85C; VIN=2.7 to 5.5V), SCL, SDA, TXON, STROBE, TORCH pins.
Parameter
Symbol
min
typ
max
Unit
High-Level Input Voltage
VIH
1.2
VIN
V
Low-Level Input Voltage
VIL
0.4
V
Low-Level Output Voltage (Iout= 3mA)
VOL
0.4
V
(SDA pin)
Input Leakage Current1
(SCL, SDA pins)
IIN1
-2
2
A
Pull-down Resistance (TXON, STROBE, TORCH pins)
RIN
100
300
700
k
9. Electrical Characteristics
(PGND=VSS=0V (Note 3), VIN=2.7 to 4.7V,Ta=-30 to 85 °C, Recommend Parts, unless otherwise specified)
Parameter
Symbol min
typ
max Unit Conditions
LED1, LED2 bits = “0”
Power-down Current
ISB
1.0
5.0
A SCL, SDA pins= VIN
VIN= 3.7V
LED1=LED2=30mA
Quiescent Current
IQ
1
1.5
mA setting
(from VIN pin)
VOUT= 4.5V
LED Current Accuracy1
ILED1=ILED2= 800mA
IACCU1
-8
8
%
(VIN=3.7V, Ta=25 °C)
(flash mode)
LED Current Accuracy2
ILED1=ILED2= 800mA
IACCU2
-10
10
%
(flash mode)
LED Current Accuracy3
ILED1=ILED2= 200mA
IACCU3
-12
12
%
(torch mode)
2.8VVLED1,VLED2 4.2V
Current Source Dropped Voltage 1
VDROP1
0.35
0.38
V
ILED1=ILED2= 0.03to0.8A ,
(VOUT-(LED1 or 2) pin voltage)
CB bit= “0”
2.8VVLED1,VLED2 4.2V
Current Source Dropped Voltage 2
VDROP2
0.43
0.46
V
ILED1=ILED2= 1A , CB bit=
(VOUT-(LED1 or 2) pin voltage)
“1”
Over Voltage Protection
4.9
5.1
5.3
OVP
V
(Hysteresis)
(0.21)
Under Voltage Lock Out (UVLO)
2.4
2.5
2.6
VUVLO
V
(Hysteresis)
(0.1)
Boost Frequency
FBOOST
2.6
4.0
4.4 MHz
Timeout Time Accuracy
TOUTA
-10
35
%
Ta=25°C, VIN=3.7V
Inductor Current Limit Accuracy
ILIMITA
-15
15
%
TXON pin= “L” to “H”
Flash to Torch LED Current
ILED1=ILED2=1000mA to
TFtoT
5
s
Setting Time
30mA
NTC pin Detection Accuracy
VDETA
-8
8
%
NTC pin current
VCurrent
32
35
38
A
VIN Detection Accuracy
VDETA
-5
5
%
VIN Detection Hysteresis
VDETH
0.1
V
Thermal Protection Temperature
Treg
140
170
°C
(Hysteresis)
Tregh
(50)
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10. Digital Characteristics
■ Control Interface Timing
(Ta = -30 to 85C; VIN = 2.7 to 5.5V)
Parameter
Symbol
min
typ
max
Unit
SCL Clock Frequency
FSCL
400
kHz
Bus Free Time Between Transmissions
tBUF
1.3
s
Start Condition Hold Time (prior to first clock pulse)
tHD:STA
0.6
s
Clock Low Time
tLOW
1.3
s
Clock High Time
tHIGH
0.6
s
Setup Time for Repeated Start Condition
tSU:STA
0.6
s
SDA Hold Time from SCL Falling (Note 6)
tHD:DAT
0
s
SDA Setup Time from SCL Rising
tSU:DAT
0.1
s
Rise Time of Both SDA and SCL Lines
tR
0.3
s
Fall Time of Both SDA and SCL Lines
tF
0.3
s
Setup Time for Stop Condition
tSU:STO
0.6
s
Capacitive load on bus
Cb
400
pF
Pulse Width of Spike Noise Suppressed by Input Filter
tSP
0
50
ns
Note 6. Data must be held long enough to bridge the 300ns transition time of SCL.
■ Timing Diagram
VIH
SDA
VIL
tLOW
tBUF
tR
tHIGH
tF
tSP
VIH
SCL
VIL
tHD:STA
Stop
tHD:DAT
tSU:DAT
tSU:STA
tSU:STO
Start
Stop
Start
Figure 2. I2C Bus Mode Timing
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11. Functional Descriptions
The AP2061 is a synchronically boost DC-DC converter supporting a 4MHz switching frequency. The
AP2061 can drive LEDs which are connected to LED1 and LED2 pins with internal regulated current sources.
The regulated current sources (high-side current sources) use PMOS FETs, allowing the LEDs to be directly
connected to ground and providing better LED heat dissipation and simpler LED arrangement. The AP2061
can automatically regulate the output voltage with different LED Forward Voltages (VF).
The AP2061 integrates a TXON input which can be used to change the LED current from flash mode to torch
mode immediately in order to reduce the battery current during RF transmission or high current events.
■ Protection Function
To prevent system troubles and device damages, the AP2061 has protection functions as shown below.
(PGND=VSS=0V; (Note 3), VIN=3.7V, Ta=25°C, Recommend Parts, unless otherwise specified)
No
Protection
1
LED thermal protection
(refer to next page)
2
Over current protection
(OCP)
Protection Enable Condition
NTC pin voltage
< setting voltage
(DET[2:0])
Inductor peak current
> setting current
(LIMIT[1:0])
Device status
All circuits power-down
Address = “06H”, NTC = “1”
Set LED1= LED2= “0”
(Note 7)
Switching NMOSFET change
to off when inductor current
reach to limited current
Return automatically
(1 cycle detected)
3
Battery voltage detection
In the case of flashing
VIN pin voltage
< setting voltage
(VIN[1:0])
4
Over Voltage Protection
(OVP)
VOUT pin voltage
> 5.1V
Boost circuit power-down
5
Under Voltage Lock Out
(UVLO)
VIN pin voltage
< 2.5V
All circuits power-down
Address = “06H”, UVLO = “1”
Device temperature
> 170 °C
TSDSEL bit= “0”:
All circuits power-down
Address = “06H”, TSD = “1”
TSDSEL bit = “1”:
Boost circuit and current
source circuit power-down
6
7
8
Thermal Shut-Down
(TSD)
LED1, LED2 pin in the state
of open or short to GND
VOUT short to GND
(VOUT-LED1 < 0.1V
or VOUT-LED2 < 0.1V)
and OVP is detected
LED1 pin < 1.0V
or LED2 < 1.0V for 20us
When
VOUT pin voltage < 1.0V
or in the case of start-up,
If
VOUT voltage < VIN-0.1V,
1ms after Mini PON
(COUT ≤ 10µF)
Recovering Condition
Change to torch mode
Next flash signal,
Return automatically
VIN pin voltage
>setting
voltage+0.1V
Return automatically
VOUT pin voltage
< 5.1V–0.215V
Set LED1= LED2= “0”
again
TSDSEL bit= “0”:
Set LED1 = LED2 =
“0” again
TSDSEL bit = “1”:
Return automatically
Device temperature
>120 °C
All circuit power-down
Address = “06H”, LO = “1”
All circuit power-down
Address = “06H”, LS = “1”
Set LED1= LED2= “0”
(Note 7)
All circuit power-down
Address = “06H”, VOS = “1”
Note 7. The AP2061 can recover from all circuit power-down by setting LED1 bit = LED2 bit= “1”, after
setting LED1 bit = LED2 bit = “0” once. In this case, the register setting should be written again since
registers are reset. The AP2061 will be powered down again unless removing all error statuses.
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■ LED Temperature Detection Function
The AP2061 can detect LED temperature with a NTC thermistor (Negative Temperature Coefficient Thermistor)
which is connected to the NTC pin. The current which flows at the NTC thermistor is 35uA.
Protection
Protection Enable Condition
Device Status
LED1, LED2 temperature NTC pin voltage
All circuits power-down
protection
< setting voltage(DET[2:0]) Address= “06H”, NTC= “1”
Note 8. The parasitic capacitance of the NTC pin should be lower than 50pF.
Recovering Condition
Set LED1= LED2= “0”
Example)
NTC thermistor: NCP15WM154 (150kΩ @ 25°C, B constant = 4582, 1005 size, Murata Manufacturing)
NCP15WM224 (220kΩ @ 25°C, B constant = 4582, 1005 size, Murata Manufacturing)
Formula: R = Ro*exp(B*(1/T-1/To))
R: Resistance with ambient temperature T (K)
K: kelvin
Ro: Resistance with ambient temperature To (K)
Detection Voltage V @ typ
(set by resistor)
Detection Resistance (kΩ)
Detection Temperature (°C)
(when using 150kΩ)
Detection Temperature (°C)
(when using 220kΩ)
0.60
0.67
0.74
0.81
0.88
0.95
1.02
17.1
19.1
21.1
23.1
25.1
27.1
29.1
74
71
69
66
64
62
61
84
82
79
76
74
72
70
In the case of using 150kΩ
Resistance (kΩ)
In the case of using 220kΩ
Temperature (C)
Figure 3. LED Temperature
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■ Recommend Sequence Examples
The AP2061 does not have a power-on pin and it is automatically powered up by an internal power-on-reset circuit.
The CPU load is reduced by this internal power-on-reset circuit since a pin controlling is not necessary. LEVEL
control (EDGE bit= “0”) or EDGE control (EDGE bit= “1”) can be selected by a register setting.
 LEVEL Control
Flashing: A) The time of STROBE pin= “H” or the time of FLASH bit= “1” < setting timer
Driving LED while STROBE= “H” or FLASH bit= “1”.
B) The time of STROBE pin= “H” or the time of FLASH bit= “1” > setting timer
The time of driving LED= setting time (TIME [3-0] bits).
Torching: Driving LED while TORCH pin= “H” or TORCH bit= “1”.
 EDGE Control
Flashing: Driving LED with the edge of STROBE pin= “L” to “H” or the edge of FLASH bit= “0” to“1”.
Maximum driving time is limited by setting time.
Torching: Driving LED while TORCH pin= “H” or TORCH bit= “1”.
1) Flashing Sequence (LEVEL Control)
Power Supply
(1)
LED1,LED2
Setting
(2)
Resister
Setting
Setting
(3)
STROBE pin
or FLASH bit
VIN
VOUT pin
Setting timer
Setting timer
Internal Timer
LED
Current
(7) reset
(4)
(4)
(7) reset
(5)
(6)
(5)
(6)
Figure 4. Flashing Sequence (LEVEL Control)
(1) To reset the internal circuits of the AP2601, wait 5ms after power is supplied (VIN ≥ 2.7V) to the
AP2601 and set LED2-1 bits = “01”, “10” or “11”. The AP2061 is powered up by setting LED1 and
LED2 bits.
(2) After LED1 and LED2 bits are set, the VOUT pin voltage changes to VIN*95% within 5ms with inrush
current< 500mA.
(3) Set STROBE pin= “H” or FLASH bit= “1” after register settings are finished.
The AP2061 can drive LEDs by setting the STROBE pin = “H” or FLASH bit = “1” regardless of the
VOUT voltage. Wait 5ms and set the STOBE pin = “H” or FLASH bit = “1” after setting LED2-1 bits.
(4) The internal timer will start after setting the STROBE pin= “L” to “H” or FLASH bit= “0” to “1”.
(5) In the case of VOUT= VIN, LED current will reach the setting current within 1ms after setting the
STROBE pin= “L” to “H” or FLASH bit= “0” to “1”.
(6) When setting the STROBE pin= “H” to “L” or FLASH bit= “1” to “0”,
The time of STROBE= “H” or the time of FLASH bit= “1” > setting time:
LED current will change to 0mA immediately after the timer is finished.
The time of STROBE= “H” or the time of FLASH bit= “1” < setting time:
LED current will change to 0mA immediately.
(7) The timer will be reset by setting the STROBE pin= “H” to “L” or FLASH bit= “1” to “0”.
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2) Flashing Sequence (EDGE Control)
Power Supply
(1)
LED1,LED2
Setting
(2)
Resister
Setting
Setting
(3)
STROBE pin
or FLASH bit
VIN
VOUT pin
Setting timer
Setting timer
Internal Timer
LED
Current
(7) reset
(4)
(5)
(6)
(7) reset
(4)
(5)
(6)
Figure 5. Flashing Sequence (EDGE control)
(1) To reset the internal circuits of the AP2601, wait 5ms after power is supplied (VIN ≥ 2.7V) to the
AP2601 and set LED2-1 bits = “01”, “10” or “11”. The AP2061 is powered up by setting LED1 and
LED2 bits.
(2) After LED1 and LED2 bits are set, the VOUT pin voltage changes to VIN*95% within 5ms with inrush
current < 500mA.
(3) Set STROBE pin= “H” or FLASH bit= “1” after register settings are finished.
The AP2061 can drive LED by setting the STROBE pin = “H” or FLASH bit = “1” regardless of the
VOUT voltage. Wait 5ms and set the STOBE pin = “H” or FLASH bit = “1” after setting LED2-1
bits.
(4) The internal timer will start after setting the STROBE pin= “L” to “H” or FLASH bit= “0” to “1”.
(5) In the case of VOUT= VIN, LED current will reach the setting current within 1ms after setting the
STROBE pin= “L” to “H” or FLASH bit= “0” to “1”.
(6) After the timer is finished, LED current will change to 0mA immediately even if the STROBE pin=
“H” or FLASH bit= “1”.
(7) When the internal timer is finished, it will be reset automatically.
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3) Torching Sequence (LEVEL Control or EDGE Control)
Power Supply
(1)
LED1,LED2
Setting
(2)
Resister
Setting
Setting
(3)
TORCH pin
or TORCH bit
VIN
VOUT pin
LED
Current
(4)
(5)
Figure 6. Torching Sequence
(1) To reset the internal circuits of the AP2601, wait 5ms after power is supplied (VIN ≥ 2.7V) to the
AP2601 and set LED2-1 bits = “01”, “10” or “11”. The AP2061 is powered up by setting LED1 and
LED2 bits.
(2) After LED1 and LED2 bits are set, the VOUT pin voltage changes to VIN*95% within 5ms with inrush
current < 500mA.
(3) Set the TORCH pin= “H” or TORCH bit= “1” after register settings are finished.
The AP2061 can drive LED by setting the TORCH pin = “H” or TORCH bit = “1” regardless of the
VOUT voltage. Wait 5ms and set the TORCH pin = “H” or TORCH bit = “1” after setting LED2-1
bits.
(4) In the case of VOUT= VIN, LED current will reach the setting current within 300s after setting the
TORCH pin= “L” to “H” or TORCH bit= “0” to “1”.
(5) LED current will change to 0mA immediately when setting the TORCH pin= “H” to “L” or TORCH
bit= “1” to “0”.
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4) Off → Torch → Flash → Torch → OFF Sequence (LEVEL Control)
Power Supply
(1)
LED1,LED2
Setting
Resister
Setting
(2)
Setting
(3)
TORCH pin
or TORCH bit
STROBE pin
or FLASH bit
Setting timer
Setting timer
(8) reset
(5)
(5)
(8) reset
Internal Timer
LED
Current
(6)
(7)
(4)
(6)
(7)
Figure 7. Torching to Flashing Sequence (LEVEL Control)
(1) To reset the internal circuits of the AP2601, wait 5ms after power is supplied (VIN ≥ 2.7V) to the
AP2601 and set LED2-1 bits = “01”, “10” or “11”. The AP2061 is powered up by setting LED1 and
LED2 bits.
(2) After LED1 and LED2 bits are set, the VOUT pin voltage changes to VIN*95% within 5ms with inrush
current < 500mA.
(3) Set TORCH pin= “H” or TORCH bit= “1” after register settings are finished.
Wait 5ms and set the TORCH pin = “H” or TORCH bit = “1” after setting LED2-1 bits.
(4) LED current will reach the setting current within 300s after setting the TORCH pin= “L” to “H” or
TORCH bit= “0” to “1”.
(5) The internal timer will start after setting the STROBE pin= “L” to “H” or FLASH bit= “0” to “1”.
(6) LED current will reach the setting current within 500s after setting the STROBE pin= “L” to “H” or
FLASH bit= “0” to “1”.
(7) When setting the STROBE pin= “H” to “L” or FLASH bit= “1” to “0”,
The time of STROBE= “H” or the time of FLASH bit= “1” > setting time:
LED current will change to 0mA immediately after the timer is finished.
The time of STROBE= “H” or the time of FLASH bit= “1” < setting time:
LED current will change to 0mA immediately.
(8) The timer will be reset by setting the STROBE pin= “H” to “L” or FLASH bit= “1” to “0”.
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[AP2061AEC]
5) OFF → Torch → Flash → Torch → OFF (EDGE Control)
Power Supply
(1)
LED1,LED2
Setting
Resister
Setting
(2)
Setting
(3)
TORCH pin
or TORCH bit
STROBE pin
or FLASH bit
Setting timer
Setting timer
(5)
Internal Timer
LED
Current
(8) Reset
(6)
(7)
(8) Reset
(5)
(6)
(7)
(4)
Figure 8. Torching to Flashing Sequence (EDGE Control)
(1) To reset the internal circuits of the AP2601, wait 5ms after power is supplied (VIN ≥ 2.7V) to the
AP2601 and set LED2-1 bits = “01”, “10” or “11”. The AP2061 is powered up by setting LED1 and
LED2 bits.
(2) After LED1 and LED2 bits are set, the VOUT pin voltage changes to VIN*95% within 5ms with inrush
current < 500mA.
(3) Set the TORCH pin= “H” or TORCH bit= “1” after register settings are finished.
Wait 5ms and set the TORCH pin = “H” or TORCH bit = “1” after setting LED2-1 bits.
(4) LED current will reach the setting current within 300s after setting the TORCH pin= “L” to “H” or
TORCH bit= “0” to “1”.
(5) The internal timer will start after setting the STROBE pin= “L” to “H” or FLASH bit= “0” to “1”.
(6) LED current will reach the setting current within 500s after setting the STROBE pin= “L” to “H” or
FLASH bit= “0” to “1”.
(7) LED current will change to 0mA immediately after the timer is finished even if the STROBE pin= “H”
or FLASH bit= “1”.
(8) When the internal timer is finished, it will be reset automatically.
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2014/01
[AP2061AEC]
■ Typical Performance Characteristics
(VIN= 3.7V, Ta= 25 C, with Recommend Parts, using MAMK2520TR47M inductor, unless otherwise specified)
Figure 9. Lighting Characteristics
LED Power Efficiency
(LEDVF=4V@2A, [email protected])
DC-DC Efficiency
(LEDVF=4V@2A, [email protected])
Figure 10. Efficiency Characteristics
MS1603-E-00
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2014/01
[AP2061AEC]
Figure 11. Input Current Characteristics
Figure 12. Device Temperature Increase
Figure 13. TXON Characteristics (VIN=3.8V, LEDVF=3.8V@2A)
VNTC=1.02V(about
60℃) is detected
Figure 14. LED Temperature Detection Characteristics (VIN=3.8V)
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2014/01
[AP2061AEC]
■ Serial Control Interface
The AP2061 supports a fast-mode I2C-bus system (max: 400kHz). Pull-up resistors at the SCL and SDA pins should
be connected to VIN pin or less. Refer to the “Recommended Operating Conditions” for the maximum voltage of the
VIN pin.
(1) WRITE Operations
Figure 15 shows the data transfer sequence for the I2C-bus mode. All commands are preceded by START condition.
A HIGH to LOW transition on the SDA line while SCL is HIGH defines START condition (Figure 20). After the
START condition, a slave address is sent. This address is 7 bits long followed by the eighth bit that is a data direction
bit (R/W). The most significant seven bits of the slave address are fixed as “0110111” (Figure 16). If the slave
address matches that of the AP2061, the AP2061 generates an acknowledge and the operation is executed. The
master must generate the acknowledge-related clock pulse and release the SDA line (HIGH) during the
acknowledge clock pulse (Figure 21). An R/W bit value of “1” indicates that the read operation is to be executed.
“0” indicates that the write operation is to be executed.
The second byte consists of the control register address of the AP2061. The format is MSB first, and those most
significant 3-bits are fixed to zero (Figure 17). The data after the second byte contains control data. The format is
MSB first, 8-bits (Figure 18). The AP2061 generates an acknowledge after each byte is received. A data transfer is
always terminated by STOP condition generated by the master. A LOW to HIGH transition on the SDA line while
SCL is HIGH defines STOP condition (Figure 20).
The AP2061 can perform more than one byte write operation per sequence. After receipt of the third byte the
AP2061 generates an acknowledge and awaits the next data. The master can transmit more than one byte instead of
terminating the write cycle after the first data byte is transferred. After receiving each data packet the internal 5-bit
address counter is incremented by one, and the next data is automatically taken into the next address. If the address
exceeds 0BH prior to generating the stop condition, the address counter will “roll over” to 00H and the previous data
will be overwritten.
The data on the SDA line must remain stable during the HIGH period of the clock. The HIGH or LOW state of the
data line can only change when the clock signal on the SCL line is LOW (Figure 22) except for the START and
STOP conditions.
S
T
A
R
T
SDA
S
T
O
P
R/W="0"
Slave
S Address
Sub
Address(n)
Data(n)
A
C
K
A
C
K
Data(n+1)
A
C
K
Data(n+x)
A
C
K
A
C
K
P
A
C
K
Figure 15. Data Transfer Sequence
0
1
1
0
1
1
1
R/W
A2
A1
A0
D1
D0
Figure 16. The First Byte
X
X
X
X
X
Figure 17. The Second Byte (X: Don’t care)
D7
D6
D5
D4
D3
D2
Figure 18. Byte Structure after The Second Byte
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[AP2061AEC]
(2) READ Operations
Set the R/W bit = “1” for a READ operation of the AP2061. The master can read the next address’s data by
generating an acknowledge instead of terminating the write cycle after the receipt of the first data word. After
receiving each data packet the internal 5-bit address counter is incremented, and the next data is automatically taken
into the next address. If the address exceeds 06H prior to generating stop condition, the address counter will “roll
over” to 00H and the previous data will be overwritten.
The AP2061 supports two basic read operations: RANDOM ADDRESS READ.
(3)
RANDOM ADDRESS READ
The random read operation allows the master to access any memory location at random. Prior to issuing the slave
address with the R/W bit “1”, the master must first perform a “dummy” write operation. The master issues start
request, a slave address (R/W bit = “0”) and then the register address to read. After the register address is
acknowledged, the master immediately reissues the start request and the slave address with the R/W bit “1”. The
AP2061 then generates an acknowledge, 1 byte of data and increments the internal address counter by 1. If the
master does not generate an acknowledge to the data but generates a stop condition, the AP2061 ceases
transmission.
S
T
A
R
T
SDA
S
T
A
R
T
R/W="0"
Slave
S Address
Sub
Address(n)
A
C
K
Slave
S Address
A
C
K
S
T
O
P
R/W="1"
Data(n)
A
C
K
Data(n+1)
MA
AC
S K
T
E
R
Data(n+x)
MA
AC
S
T K
E
R
MA
AC
S
T K
E
R
P
MN
A A
S
T C
E K
R
Figure 19. RANDOM ADDRESS READ
SDA
SCL
S
P
start condition
stop condition
Figure 20. START and STOP Conditions
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2014/01
[AP2061AEC]
DATA
OUTPUT BY
TRANSMITTER
not acknowledge
DATA
OUTPUT BY
RECEIVER
acknowledge
SCL FROM
MASTER
2
1
8
9
S
clock pulse for
acknowledgement
START
CONDITION
Figure 21. Acknowledge on the I2C-Bus
SDA
SCL
data line
stable;
data valid
change
of data
allowed
Figure 22. Bit Transfer on the I2C-Bus
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[AP2061AEC]
12. Register Map
■ Register Map
(PGND= VSS= 0V; (Note 3), VIN= 3.7V, Ta= 25°C, with Recommend Parts, unless otherwise specified)
Address
00H
01H
02H
03H
04H
05H
06H
Register Name
Instruction
LED1/2 Control 1
LED1/2 Control 2
LED1/2 Control 3
Others
Light Control
Fault/Status
D7
INST7
LIGHTNG
D6
INST6
D5
INST5
D4
INST4
D3
INST3
D2
INST2
TSDSEL
DIM
VIN1
CB
LEDT2
VIN0
EDGE
LEDT1
DET2
TIME3
LEDT0
DET1
TIME2
LEDF2
DET0
ENNG
TSD
NTC
LO
UVLO
D1
INST1
LED2
TIME1
LEDF1
LIMIT1
FLASH
D0
INST0
LED1
TIME0
LEDF0
LIMIT0
TORCH
VOS
LS
Note 9. For addresses from 07H, data must not be written.
■ Register Definitions
Address
00H
Register Name
Instruction
Read/Write
Default
D7
INST7
R/W
0
D6
INST6
R/W
0
D5
INST5
R/W
0
D4
INST4
R/W
0
D3
INST3
R/W
0
D2
INST2
R/W
0
D1
INST1
R/W
0
D0
INST0
R/W
0
INST[7:0]: The instruction for error protection.
If INST[7:0] bits = “01101001” is not written, accessing to the other registers are not valid.
At first, please set INST[7:0] bits = “01101001”.
Address
01H
Register Name
LED1/2 Control
Read/Write
Default
D7
D6
D5
D4
D3
D2
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
LED1, LED2: Power ON/OFF of the AP2061 and ON/OFF
LED1.
Table 2. AP2061 & LED Status Setting
LED2
LED1
0
0
0
1
1
0
1
1
MS1603-E-00
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D1
LED2
R/W
0
D0
LED1
R/W
0
controlling of LEDs which connect to LED2,
AP2061 Status
Power-down
LED1=on, LED2=off
LED1= off, LED2=on
LED1=on, LED2=on
2014/01
[AP2061AEC]
Address
02H
Register Name
LED1/2 Control 2
R/W
Default
D7
R/W
0
D6
TSDSEL
R/W
0
D5
CB
R/W
0
D4
EDGE
R/W
0
D3
TIME3
R/W
0
D2
TIME2
R/W
1
D1
TIME1
R/W
1
D0
TIME0
R/W
1
TIME0, TIME1, TIME2, TIME3: The on-time setting for LEDs that connect to LED1, LED2 in flash mode.
Table 3. LED On-time Setting in Flash Mode
TIME3 TIME2 TIME1 TIME0
Time
TIME3 TIME2 TIME1 TIME0
Time
0
0
0
0
5ms
1
0
0
0
120ms
0
0
0
1
10ms
1
0
0
1
150ms
0
0
1
0
20ms
1
0
1
0
200ms
0
0
1
1
30ms
1
0
1
1
250ms
0
1
0
0
40ms
1
1
0
0
300ms
0
1
0
1
50ms
1
1
0
1
400ms
0
1
1
0
70ms
1
1
1
0
600ms
1
1
1
1
800ms
0
1
1
1
90ms
EDGE: Flashing Time Control Method Select
0: Level control
1: Edge control (flashing time is controlled by internal timer)
CB: Current Source Dropping Voltage (VOUT-LED1/2) Setting
0: 0.35V
1: 0.43V
Use this register to set current source dropped voltage (VOUT-LED pins).
When using a LED whose VF is very low, please set CB bit= “1”.
(Example: LED current= 2A, LED VF=2.8V @ 2A)
TSDSEL: Thermal Shut Down Recovery Mode
0: Not Recover. Set LED1 bit = LED2 bit = “0” again.
1: Recover Automatically
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[AP2061AEC]
Address
03H
Register Name
LED1/2 Control 3
R/W
Default
D7
R/W
0
D6
DIM
R/W
0
D5
LEDT2
R/W
0
D4
LEDT1
R/W
0
D3
LEDT0
R/W
1
D2
LEDF2
R/W
1
D1
LEDF1
R/W
0
LEDF0, LEDF1, LEDF2: LED Current Setting for LED1 and LED2 channels.
Table 4. LED Current Setting for Flash Mode
LEDF2
LEDF1
LEDF0
FLASH (1ch)
FLASH (total)
0
0
0
137
274
0
0
1
236
472
0
1
0
337
674
0
1
1
439
878
1
0
0
541
1082
1
0
1
645
1290
1
1
0
800
1600
1
1
1
1000
2000
D0
LEDF0
R/W
0
Unit
mA
mA
mA
mA
mA
mA
mA
mA
LEDT0, LEDT1, LEDT2: LED Current Setting for LED1 and LED2 channels.
DIM: Small Torching Current Setting
0: Normal Setting
1: Torching Current = 1/5 Normal Setting Current
Table 5. LED Current Setting for Torch Mode
TORCH (1ch)
LEDT2 LEDT1 LEDT0
DIM= “0”
DIM= “1”
0
0
0
25
5.0
0
0
1
43
8.6
0
1
0
62
12.4
0
1
1
81
16.2
1
0
0
100
20
1
0
1
120
24
1
1
0
150
30
1
1
1
190
38
MS1603-E-00
- 22 -
TORCH (2ch)
DIM= “0”
DIM= “1”
50
10
86
17.2
124
24.8
162
32.4
200
40
240
48
300
60
380
76
Unit
mA
mA
mA
mA
mA
mA
mA
mA
2014/01
[AP2061AEC]
Address
04H
Register Name
Others
R/W
Default
D7
R/W
0
D6
VIN1
R/W
0
D5
VIN0
R/W
0
D4
DET2
R/W
0
D3
DET1
R/W
0
D2
DET0
R/W
0
D1
LIMIT1
R/W
1
D0
LIMIT0
R/W
0
LIMIT1, LIMIT0: Inductor limit Current Setting
Table 6. Inductor Current Limit Setting
LIMIT1
LIMIT0
Limit Current
0
0
4.4A
0
1
3.5A
1
0
2.5A
1
1
1.5A
DET2, DET1, DET0: NTC pin Voltage Detection Setting (NTC pin= 35A)
* Connect a thermistor externally. The AP2061 will power down its all circuits if the NTC pin voltage drops to
a level under the value set by these bits as it is regarded that the LEDs are over heated.
When not using this function, set DET[2:0] bits = “000”. (The default setting is OFF)
Table 7. NTC pin Voltage Detection
DET2
DET1
DET0
NTC pin Voltage
0
0
0
OFF
0
0
1
0.60V
0
1
0
0.67V
0
1
1
0.74V
1
0
0
0.81V
1
0
1
0.88V
1
1
0
0.95V
1
1
1
1.02V
VIN1, VIN0: Input Voltage Detection
* By this function, the AP2061 exits Flash mode forcibly if the input voltage is too low. The AP2061 stops
flash mode and change to torch mode for a protection if the power supply voltage drops to a level under the
value set by these bits. When not using this function, set VIN[1:0] bits = “00”. (The default setting is OFF)
Table 8. Battery Voltage Detection
VIN1
VIN0
Detection Voltage
0
0
off
0
1
3.3V
1
0
3.1V
1
1
2.9V
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2014/01
[AP2061AEC]
Address
05H
Register Name
Light Control
R/W
Default
D7
D6
D5
D4
D3
D2
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
D1
FLASH
R/W
0
D0
TORCH
R/W
0
FLASH: Drive LED with flashing current
TORCH::Drive LED with torching current
Table 9. LED Control Status (LED1= LED2 bits= “01” or “10” or “11”)
TXON pin
STROBE pin TORCH pin FLASH bit TROCH bit
L
L
L
0
0
L
L
L
0
1
L
L
L
1
0
L
L
L
1
1
L
L
H
0
0
L
L
H
0
1
L
L
H
1
0
L
L
H
1
1
L
H
*
*
*
H
L
L
0
0
STROBE pin = “H” or TORCH pin= “H”
H
or FLASH bit = “1” or TORCH bit = “1”
Address
06H
Register Name
Fault/Status
R/W
Default
D7
LIGHTNG
RD
0
D6
ENNG
RD
0
D5
TSD
RD
0
D4
NTC
RD
0
D3
LO
RD
0
D2
UVLO
RD
0
Status
Standby
TORCH
FLASH
FLASH
TORCH
TORCH
FLASH
FLASH
FLASH
Standby
TORCH
D1
VOS
RD
0
D0
LS
RD
0
LS: Short Status Bit of the LED1 or LED2 pin
0: Not shorted
1: Shorted to GND
VOS: Short Status Bit of the VOUT1 or VOUT2 pin
0: Not shorted
1: Shorted to GND
UVLO: UVLO Detection
0: Not Detected
1: Detected
LO: LED Open Status Bit
0: Not Open
1: Open
NTC: NTC pin Protection Indication
0: Not working
1: Working
TSD: Thermal Shut Down Detection
0: Not Detected
1: Detected
ENNG: for Start-up Stand-by
0: VOUT ≥ VIN-0.1V (Stand-by)
1: VOUT < VIN-0.1V (Not Stand-by)
LIGHTNG: for Second Start-up Stand-by
0: VOUT ≈ VIN (Stand-by)
1: VOUT ≠ VIN (Not Stand-by)
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[AP2061AEC]
13. Recommended External Circuits
SW1
SW2
VIN
UVLO
OVP
VOUT1
BULK
CONT
Cin
VOUT2
OSC
∑
Cout
CONT
PWM
COMPARATOR
VIN
Current
Limit
Error Amp
DET
NTC
LED1
SCL
LED2
SDA
2
I C I/F
& Control
STROBE
TXON
Current
& Control
TORCH
VSS
PGND1
PGND2
Figure 23. Recommended External Circuits
Recommended External Parts (LED1=LED2=800mA, VIN = 3.3 to 4.5V, LEDVF4.2V)
Table 10. Recommend External Parts Examples
Item
Symbol
Inductor
L
Value
0.47μH
1μH
1μH
1μH
1μH
4.7μF
Capacitor
Cin
10μF
Capacitor
NTC
Thermistor
Cout
NTC
10μF
150kΩ
220kΩ
470kΩ
Type (example)
MAMK2520TR47M
DFE252010C (DCR<59Ω)
LQH44PN1R0NP0 (DCR<50mΩ)
VLF4014ST-1R0N2R3 (DCR<49mΩ)
TFM252010 (DCR < 65mΩ)
GRM188B30J475KE18 (6.3V)
GRM188B31C475MAAJ (16V)
C1608JB0J475K, C1608JB0J475M
C1608X5R0J475K, C1608X5R0J475M
GRM219B31C106KA73 (16V)
GRM219R61C106KA73 (16V)
GRM188B31A106ME6 (10V)
C2012JB1A106K085AC (10V),
C2012JB0J106K085AB (6..3V)
C2012JB1A106K085AC (10V),
C2012JB0J106K085AB (6.3V)
GRM219B31C106KA73 (16V)
GRM219R61C106KA73 (16V)
GRM188B31A106ME6 (10V)
-
Size (mm)
2.5 x 2.0 x 1.2
2.5x2.0x1.2
3.7x4.0x1.8
3.8x3.6x1.4
2.5x2.0x1.0
1.6 x 0.8 x 0.8
1.6 x 0.8 x 0.8
Manufacturer
TAIYO-YUDEN
TOKO
MURATA
TDK
TDK
1.6 x 0.8 x 0.8
TDK
2.0 x 1.3 x 0.85
2.0 x 1.3 x 0.85
1.6 x 0.8 x 0.8
MURATA
2.0 x 1.3 x 0.85mm
TDK
2.0 x 1.3 x 0.85
TDK
2.0 x 1.3 x 0.85
2.0 x 1.3 x 0.85
1.6 x 0.8 x 0.8
MURATA
1.0×0.5
TDK
MURATA
MURATA
Note 10. The PGND and VSS pins must be connected to the same ground plane.
Note 11. The inductor should be placed as close as possible to the AP2061.
Note 12. Capacitors should be placed as close as possible to the AP2061. Low ESR (Equivalent Series
Resistance) capacitors are recommended.
Note 13. The wiring connection to LEDs must be less than 20cm.
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2014/01
[AP2061AEC]
14. Package
■ Outline Dimensions
16-pin CSP (Unit: mm)
■ PCB Layout Example
4.0mm
Inductor
Please connect NTC pin,
TROCH pin, TXON pin and
STROBE pin to GND, if these
pins are not used.
(2520)
Cout
4.5mm
LED1
LED1
LED2
TORCH
VIN
VOUT
SW1
PGND
LED2
VOUT
SW2
PGND
TORCH
TXON
STROBE
VSS
NTC
SDA
SCL
VIN
Cin
NTC
TXON
MS1603-E-00
SDA SCL STROBE
- 26 -
2014/01
[AP2061AEC]
■ Marking
2061
Market No.（Product No.）
YWWA
Pin #1 indication
YWWA: Date code (4 digit)
A: manage number
WW: producing week
Y: producing year (Ex: 2013→ “3”)
MS1603-E-00
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2014/01
[AP2061AEC]
15. Revise History
Date
(YY/MM/DD)
14/01/27
MS1603-E-00
Revision
00
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[AP2061AEC]
IMPORTANT NOTICE
0. Asahi Kasei Microdevices Corporation (“AKM”) reserves the right to make changes to the
information contained in this document without notice. When you consider any use or application of
AKM product stipulated in this document (“Product”), please make inquiries the sales office of
AKM or authorized distributors as to current status of the Products.
1. All information included in this document are provided only to illustrate the operation and
application examples of AKM Products. AKM neither makes warranties or representations with
respect to the accuracy or completeness of the information contained in this document nor grants any
license to any intellectual property rights or any other rights of AKM or any third party with respect
to the information in this document. You are fully responsible for use of such information contained
in this document in your product design or applications. AKM ASSUMES NO LIABILITY FOR
ANY LOSSES INCURRED BY YOU OR THIRD PARTIES ARISING FROM THE USE OF
SUCH INFORMATION IN YOUR PRODUCT DESIGN OR APPLICATIONS.
2. The Product is neither intended nor warranted for use in equipment or systems that require
extraordinarily high levels of quality and/or reliability and/or a malfunction or failure of which may
cause loss of human life, bodily injury, serious property damage or serious public impact, including
but not limited to, equipment used in nuclear facilities, equipment used in the aerospace industry,
medical equipment, equipment used for automobiles, trains, ships and other transportation, traffic
signaling equipment, equipment used to control combustions or explosions, safety devices, elevators
and escalators, devices related to electric power, and equipment used in finance-related fields. Do
not use Product for the above use unless specifically agreed by AKM in writing.
3. Though AKM works continually to improve the Product’s quality and reliability, you are
responsible for complying with safety standards and for providing adequate designs and safeguards
for your hardware, software and systems which minimize risk and avoid situations in which a
malfunction or failure of the Product could cause loss of human life, bodily injury or damage to
property, including data loss or corruption.
4. Do not use or otherwise make available the Product or related technology or any information
contained in this document for any military purposes, including without limitation, for the design,
development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or
missile technology products (mass destruction weapons). When exporting the Products or related
technology or any information contained in this document, you should comply with the applicable
export control laws and regulations and follow the procedures required by such laws and
regulations. The Products and related technology may not be used for or incorporated into any
products or systems whose manufacture, use, or sale is prohibited under any applicable domestic or
foreign laws or regulations.
5. Please contact AKM sales representative for details as to environmental matters such as the RoHS
compatibility of the Product. Please use the Product in compliance with all applicable laws and
regulations that regulate the inclusion or use of controlled substances, including without limitation,
the EU RoHS Directive. AKM assumes no liability for damages or losses occurring as a result of
noncompliance with applicable laws and regulations.
6. Resale of the Product with provisions different from the statement and/or technical features set forth
in this document shall immediately void any warranty granted by AKM for the Product and shall not
create or extend in any manner whatsoever, any liability of AKM.
7. This document may not be reproduced or duplicated, in any form, in whole or in part, without prior
written consent of AKM.
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