ADDtek AMC7110DBF White/blue led driver for li-ion battery application Datasheet

AMC7110/1/3/4
WHITE/BLUE LED DRIVER FOR
LI-ION BATTERY APPLICATION
www.addmtek.com
DESCRIPTION
FEATURES
The AMC7110 series is member of ADDM
North Star White/Blue LED driver family. No
external component is required. Especially good
for use Li-ion battery powered LCD display’s
backlight white LEDs. The special circuit design
provides over 90% efficiency in low noise.
„
LED sink current 20mA and 15mA
„
Individual current sink circuit for all LEDs outputs to
prevent short / open circuit on LEDs.
„
PTC LED current for luminosity compensation.
„
3 channels (SOT-26), 4 channels (MSOP-8) available.
Target end applications are color LCD
display, such as mobile phone with color display,
smart phone, PDA, etc.
„
90% efficiency
„
Supply voltage range 2.7V ~ 6V
„
0.1uA standby current
„
2KV HBM ESD protection
„
Advanced Bi-CMOS process.
APPLICATIONS
„
„
Small Size Color LCD Backlights
Mobile Phone, Smart Phone Keypad Backlights
OPTIONS
PACKAGE PIN OUT
LED Sink
Current
20mA
Channel
Number
3
AMC7111
20mA
4
AMC7113
15mA
3
AMC7114
15mA
4
VDD
1
GND
2
EN
3
AMC711x
6
LED1
5
4
LED1
PGND
1
8
LED2
EN
2
7
LED2
LED3
V DD
3
6
LED3
GND
4
5
LED4
AMC7110 / AMC7113
SOT-26
AMC7110
TSOT-26
TYPICAL APPLICATION CIRCUIT
EN
Enable
VDD
Li-Ion
Battery
LED1
711x
Device
Name
AMC7110
CBP
VDD
AMC7111 / AMC7114
MSOP-8
LED1
GND
LED2
EN
LED3
LED2
AMC7110
QFN 2mm×2mm
LED4
GND
LED1
PGND
EN
LED2
VDD
LED3
GND
LED4
AMC7111
QFN 2mm×2mm
ORDER INFORMATION
18 ~ 22
SOT-26
6-pin
AMC7110DBF
MSOP-8
8-pin
AMC7111DNF
QFN 2×2
QFN 2×2
TSOT-26
W
W
6-pin
8-pin
6-pin
AMC7110DJ
AMC7110WF
AMC7111WF
19 ~ 21
AMC7110ADBF
AMC7111ADNF
-
-
-
13.5 ~ 16.5
AMC7113DBF
AMC7114DNF
-
-
-
ILED (mA)
DB
DN
DJ
Note: Surface-mount packages is available in Tape & Reel. Append “T” to part number (i.e., AMC7111DNFT).
The letter “F” is marked for lead free process.
Copyright © 2007 ADDtek Corp.
1
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-- JUNE 2007
AMC7110/1/3/4
ABSOLUTE MAXIMUM RATINGS
(Note)
-0.3V to 7V
-0.3V to 7V
-0.3V to 5.5V
150OC
-40OC to 150OC
260OC
Input Voltage, VDD
Output Voltage, VLEDn
Voltage at all other pins
Maximum Junction Temperature, TJ
Storage Temperature Range
Lead Temperature (soldering, 10 seconds)
Note:
Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground.
Currents are positive into, negative out of the specified terminal.
POWER DISSIPATION TABLE
Package
DB
DJ
DN
W
TA=70 °C
TA= 85°C
θJA
Derating factor ( mW/°C )
TA≦25 °C
Power rating (mW) Power rating (mW) Power rating (mW)
( °C/W )
TA≧25 OC
220
220
180
76.5
4.5
4.5
5.56
13.1
568
568
695
1634
363
363
444
1045
295
295
361
849
Note :
Junction Temperature Calculation: TJ = TA + (PD x θJA).
PD: Power Dissipation, TA: Ambient temperature, θJA: Thermal Resistance-Junction to Ambient
The θJA numbers are guidelines for the thermal performance of the device/PC-board system.
All of the above assume no ambient airflow.
BLOCK DIAGRAM
VDD
VDDI
EN
Control
Logic
AMC7110
Driving
Stage
Driving
Stage
Driving
Stage
Reference
Current
Copyright © 2007 ADDtek Corp.
LED1
LED2
LED3
GND
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AMC7110/1/3/4
PIN DESCRIPTION
Pin Name
Pin Function
LED1 ~ LED3/4
Output pins; connect to LED’s cathode.
EN
Enable control pin. Pulling this pin high will enable the device. Pulling this pin to GND
will disable the device.
VDD
Power supply
GND
Ground
PGND
Power ground
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Min
Typ
Supply Voltage
VDD
2.7
Output Sink current
ILED
Operating free-air temperature range
Ta
-40
Max
6
25
+85
Unit
V
mA
℃
ELECTRICAL CHARACTERISTICS
VDD=3.7V, TA=25°C, No Load, Input: VIH=3.3V, VIL=GND. (Unless otherwise noted)
Parameter
Symbol
Condition
Min
Typ
Max
Unit
0.4
V
“Low” Input Voltage
VIL
“High” Input Voltage
VIH
1.7
“Low” Input Current
IIL
-5.0
+5.0
µA
“High” Input Current
IIH
-5.0
+5.0
µA
LED Dropout Voltage
VLEDL
LED Sink Current
ILED
AMC7110/1
Note
75
90
AMC7113/4
Note
60
75
AMC7110A
AMC7111A
VDD=2.7V~6V
VLEDn=0.15~3V
VLEDn=0.15~3V
19
20
21
18
20
22
17
20
23
13.5
15
16.5
AMC7110/1
VDD=2.7V~6V
VLEDn=0.15~3V
AMC7113/4
LED Sink Current Deviation
Supply Current
Standby Supply Current
△ILEDn
V
±3
AMC7110A
±5
IDD
400
IDDSTBY
0.1
800
Apply
Pin
EN
mV
mA
LEDn
%
uA
uA
VDD
Note: LED Dropout Voltage: 90% × ILEDn @ VLEDn=150mV
Copyright © 2007 ADDtek Corp.
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AMC7110/1/3/4
APPLICATION INFORMATION
Enable
The EN pin enables and disables the device. Pulling the EN pin high will enable the device beginning sink
current on LED pins. Pulling the EN pin to ground will shutdown the device reducing the IDD current to typical 0.1uA.
This pin should not be left floating and need to be terminated.
LED Brightness Control
The LED sink current was fixed at 20mA or 15mA. Apply PWM signal to EN pin and control the duty that could
control the LED brightness from 0% to maximum.
AMC711x
EN
PWM Signal
VDD
LED1
Li-Ion
Battery
CBP
LED2
LED4
GND
Supply Voltage and Li-ion battery low warning
AMC711X works with supply voltage range from 2.7V to 6V. The white/blue LED forward voltage is in the range
of 2.9V to 3.5V at 20mA current. The supply voltage range and LED forward voltage (Vf) should be set to fully ultilize
Li-ion battery energy. For example, the maximum white LED forward voltage limit at 3.2V (@ 20mA) when Li-ion
battery discharg reaches 3.275V( normally around 1% ~ 3% power left in the battery). When Li-ion battery voltage is
lower than the presetted low level, the LED current(brightness) will start to decrease.
Efficiency
The ACR (Advanced Current Regulator) architecture offers ultra low output dropout that significantly improves
the efficiency compared to Inductive Boost type or Capacitor Charge Pump type LED driver. The system efficiency,
defined as the ratio between the LEDs power and the input supplied power, is:
Efficiency = (Vf1 x ILED1 + Vf2 x ILED2 + Vf3 x ILED3 + Vf4 x ILED4) / (VDD x IDD)
Where, Vf is the forward voltage of LED.
Copyright © 2007 ADDtek Corp.
4
DD028_F --
JUNE 2007
AMC7110/1/3/4
CHARACTERIZATION CURVES
EFFICIENCY vs. SUPPLY VOLTAGE
QUIESCENT CURRENT vs. SUPPLY VOLTAGE
( 4 LEDs, Vf=3.2V at 20mA/LED)
( 4 LEDs, Vf=3.2V at 20mA/LED)
100
EFFICIENCY P LED/PSUPPLY (%)
QUIESCENT CURRENT (uA)
300
250
200
150
100
50
0
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
95
90
85
80
75
70
65
60
4.2
3.0
3.1
3.2
3.3
Supply Voltage (V)
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
Supply Voltage (V)
POWER IN vs. SUPPLY VOLTAGE
ILED vs. SUPPLY VOLTAGE
(ILED=20mA, Vf=3.2V)
25
3.4
( 4 LEDs, Vf=3.2V at 20mA/LED)
40
35
30
Supply Power (mW)
LED Current(mA)
20
15
10
5
25
20
15
10
5
0
3.2
3.3
3.4
3.5
3.6
3.7
3.8
Supply Voltage (V)
3.9
4.0
4.1
0
4.2
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
Supply Voltage(V)
QUIESCENT CURRENT vs TEMPERATURE
400
Quesent Current (uA)
350
AMC7110/1
300
AMC7113/4
250
200
150
100
50
0
0
10
20
30
40
50
60
70
80
90
100
110
120
Temperature. (°C)
Copyright © 2007 ADDtek Corp.
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DD028_F --
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AMC7110/1/3/4
ILED vs. Efficiency
ILED vs. TEMPERATURE
( VDD=3.7V, LED Vf=3.2V)
20.9
100
20.8
20.7
90
LED Current (mA)
Efficiency PLED / PSUPPLY (%)
95
85
80
75
70
65
60
20.6
20.5
20.4
20.3
20.2
20.1
55
20.0
0
50
5
7
9
11
13
15
17
19
21
Copyright © 2007 ADDtek Corp.
10
20
30
40
50
60
70
80
90
100 110 120
Temperature. (°C)
LED Current (mA)
6
DD028_F --
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AMC7110/1/3/4
PACKAGE
Surface Mount SOT-26 (DB)
D
b
L
E
L1
c
L2
e1
M
A2
A
-
-
0.057
-
-
-
-
0.006
-
-
0.15
0.90
1.15
1.30
1.45
b
0.012
-
0.020
0.30
-
0.50
c
0.003
-
0.009
0.08
-
0.22
D
0.114 BSC
2.90 BSC
E
0.110 BSC
2.80 BSC
E1
e
0.063`BSC
1.60 BSC
0.037 BSC
0.95 BSC
e1
0.075BSC
L
0.012 0.018 0.024
1.90 BSC
0.30
0.45
L1
0.024 REF
0.60 REF
L2
0.010 BSC
0.25 BSC
°M
M
A1
MILLIMETERS
MIN TYP MAX
A1
A2 0.035 0.045 0.051
E1
e
A
INCHES
TYP MAX
MIN
5°
10°
15°
5°
10°
0.60
15°
8-Pin Plastic MSOP (DN)
A
J
INCHES
MIN
P
MAX
MIN
TYP
MAX
A
0.114 0.118 0.122
2.90
3.00
3.10
B
0.114 0.118 0.122
2.90
C
0.040 0.044
D
0.012
F
0.016 0.021 0.031
G
F
-
J
M
D
G
TYP
MILLIMETERS
K
M
P
0.026
3.00
3.10
1.02
1.12
0.30
-
0.40
0.53
0.80
-
0.65
-
0.006
0.15
0.000
-
0.006
0º
-
8º
0.185 0.193 0.201
0.00
-
0.15
0º
-
8º
4.70
4.90
5.10
C
K
Copyright © 2007 ADDtek Corp.
7
DD028_F --
JUNE 2007
AMC7110/1/3/4
6-Pin QFN 2mm×2mm
D
E
A
A3
b
SYMBOLS
MIN.
TYP.
MAX.
A
A1
A3
b
D
D1
E
E1
e
L
0.800
0.000
0.200
1.950
1.350
1.950
0.750
0.850
0.203
0.250
2.000
1.400
2.000
0.800
0.650
0.350
0.900
0.050
0.300
2.050
1.450
2.050
0.850
0.300
0.400
UNIT: MILLIMETERS
D1
e
E1
L
A1
8-Pin QFN 2mm×2mm
D
E
A
A3
b
SYMBOLS
MIN.
TYP.
MAX.
A
A1
A3
b
D
D1
E
E1
e
L
0.800
0.000
0.200
1.950
1.150
1.950
0.550
0.300
0.850
0.203
0.250
2.000
1.200
2.000
0.600
0.500
0.350
0.900
0.050
0.300
2.050
1.250
2.050
0.650
0.400
UNIT: MILLIMETERS
D1
e
E1
L
Copyright © 2007 ADDtek Corp.
A1
8
DD028_F --
JUNE 2007
AMC7110/1/3/4
Surface Mount TSOT-26
C
D
b
SYMBOLS
L
E
E1
e
θ
e1
4xθ1
A
A2
A1
Copyright © 2007 ADDtek Corp.
4xθ1
9
L1
MILLIMETERS
MIN
TYP
MAX
A
---
---
1.00
A1
0.00
0.05
0.10
A2
0.84
0.87
0.90
b
0.35
0.40
0.50
C
0.10
0.125
0.15
D
2.70
2.90
3.10
E
2.60
2.80
3.00
E1
1.40
1.60
1.80
e
---
0.95
---
e1
---
1.90
---
L
0.30
0.40
0.60
L1
0.5
0.6
0.7
θ
0°
4°
8°
θ1
4°
10°
12°
DD028_F --
JUNE 2007
AMC7110/1/3/4
IMPORTANT NOTICE
ADDtek reserves the right to make changes to its products or to discontinue any integrated circuit product or service
without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing
orders, that the information being relied on is current.
A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe
property or environmental damage. ADDtek integrated circuit products are not designed, intended, authorized, or
warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of
ADDtek products in such applications is understood to be fully at the risk of the customer. In order to minimize risks
associated with the customer’s applications, the customer should provide adequate design and operating safeguards.
ADDtek assumes to no liability to customer product design or application support. ADDtek warrants the performance of
its products to the specifications applicable at the time of sale.
ADDtek Corp.
9F, No. 20, Sec. 3, Bade Rd., Taipei, Taiwan, 105
TEL: 2-25700299
FAX: 2-25700196
Copyright © 2007 ADDtek Corp.
10
DD028_F
-- JUNE 2007
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