SM6804L [SAMHOP]
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION; 白/蓝LED驱动器LI- ION电池应用
| 型号： | SM6804L |
| 厂家： | 
SAMHOP MICROELECTRONICS CORP. |
| 描述： | WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION |
| 文件： | 总13页 (文件大小：231K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
三合微科股份有限公司
SAMHOP Microelectronics Corp.
The information in this document is subject to change without notice.
c
SAMHOP Microelectronics Corp. All Rights Reserved.
台北縣新店市民權路100號7樓
7F,No.100,Min-Chyuan Road, Hsintien, Taipei Hsien, Taiwan, R.O.C.
TEL: 886-2-2218-3978/2820 FAX: 886-2-2218-3320
Email : info@samhop.com.tw
SAMHOP Microelectronics Corp.
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION
GENERAL DESCRIPTION
FEATURES
* No external component required.
* Programmable output current control, programming
range 25% to 100% in 16 steps for LED brightness
control.
The SM6802/ SM6803/ SM6804 are White/Blue
LED Driver for Li-Ion Battery Application. 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.
* Initial LED sink current 20 mA
* 2channels (SOT-25), 3 channels (SOT-26/TSOP 6),
4 channels (MSOP-8) available.
* 90% efficiency
The SM6802/SM6803/SM6804 is Integrated with
16-step programmable output sink current for LEDs
brightness control.
* Supply voltage range 3.0 V ~ 5.0 V
* 0.1uA standby current
Target end applications are color LCD display,
such as mobile phone with color display, smart
phone, PDA, etc.
Device
Name
LED
Number
Initial LED
Sink Current Sink Current
Max. LED
SM6802
SM6803
SM6804
20mA
20mA
20mA
20mA
20mA
20mA
2
3
4
GENERAL APPLICATIONS
* Small Size Color LCD Backlights
* Mobile Phone, Smart Phone Keypad Backlights.
PIN ASSIGNMENTS
VDD
GND
1
2
3
5
4
LED1
VDD
1
2
3
6
5
4
LED1
LED2
LED3
GND
EN/CTRL
LED2
EN/CTRL
SM6802
SOT-25
SM6803
SOT-26 / TSOP 6
PGND
EN/CTRL
VDD
1
2
3
4
8
7
6
5
LED1
LED2
LED3
LED4
GND
SM6804
MSOP-8
Page 1
V.1.0 July 12,2007
SAMHOP Microelectronics Corp.
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION
TYPICAL APPLICATION
Enable and Logic
Brightness Control
EN/CTRL
VDD
Li-Ion Battery
VDD
LED1
LED2
LED3
SM6804
GND
LED4
GND
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Rating
Unit
Input Voltage
VDD
-0.3 ~ 7.0
-0.3 ~ 7.0
-0.3 ~ 5.5
150
V
V
Output Voltage
VLEDn
Voltage at all other pins
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature (soldering,10 seconds)
-
TJ
-
V
oC
oC
oC
-40 ~ 150
260
-
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
TA<25oC
TA=70oC
TA=85oC
θ°JA
TA>25oC
Package
(oCW)
Derating factor(mW/oC)
Power rating(mW) Power rating(mW) Power rating(mW)
SOT-25
SOT-26
MSOP-8
220
220
180
4.5
4.5
568
568
695
363
363
444
295
295
361
5.56
Note:
Junction Temperature Calculation; TJ = TA+(PD* θJA)
PD: Power Dissipation, TA: Ambient termperature, 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.
Page 2
V.1.0 July 12,2007
SAMHOP Microelectronics Corp.
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION
BLOCK DIAGRAM
Current BIAS
Pulse
Control
Voltage
Reference
EN/CTRL
LED1
LED2
LED3
LED4
Driver 1
Driver 2
Driver 3
Driver 4
Output Step
Control
PIN DESCRIPTION (MSOP-8)
Pin NO.
I / O
Pin Name
Function Description
1
-
PGND
Power ground.
This pin combined enable and output sink current
programming function. Pulling this pin constantly high will
enable the device, Pulsing this pin constantly to GND will
disable the device, To pulsig this pin low will decrease or
increase the output Sink current, Please refer to the
application section for further informaiton.
2
I
EN/CTRL
3
4
-
-
VDD
Power supply
Ground
GND
5~8
O
LED1~LED4
Output pins, connect to LED's cathode.
NOTE: Power ground and Ground pin must be short on PCB Board.
V.1.0 July 12,2007
Page 3
SAMHOP Microelectronics Corp.
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION
RECOMMENDED OPERATING CONDITIONS
Characteristic
Supply Voltage
Symbol
Condition
Min. Typ. Max. Unit
VDD
-
-
3
-
-
-
5
V
Output Sink Current
ILED
25
mA
Operating free-air
temperature range
Ta
-
-40
-
+85
C
DC ELECTRICAL CHARACTERISTICS
(VDD = 3.7V, Ta = 25oC, No Load, unless otherwise noted)
Apply
Pin
Characteristic
"H" Level
Symbol
Condition
Min. Typ. Max. Unit
2
VIH
VIL
IIH
-
-
-
0.4
+5.0
+5.0
30
Input Voltage
V
"L" Level
"H" Level
"L" Level
-
-
-
-5.0
-
-
Input Current
µA
IIL
-
-5.0
-
EN/CTRL
Short Low Pulse Width
Hold Time Between Pulse
Long Low Pulse Width
Minimum Disable Low Time
LED Dropout Voltage
ts
-
9
-
µs
µs
µs
µs
mV
mA
%
-
tH
-
10
-
-
175
-
tL
-
125
td
-
480
-
120
-
VLEDL
ILEDn=20mA
-
-
-
-
-
-
100
20
-
LED Maximum Sink Current ILEDmax
LED Sink Current Tolerance
-
LEDn
VDD
+/-5
+/-3
600
-
ILEDn=20mA, Between IC
LED Sink Current Deviation
Between LED1~LED4 (Note 1)
-
%
Supply Current
IDD
-
-
400
0.1
µA
µA
Standby Supply Current
IDDSTBY
Note 1: I LEDn (max) -ILEDn (average) and ILEDn(average)-ILEDn(min)
Page 4
V.1.0 July 12,2007
SAMHOP Microelectronics Corp.
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION
APPLICATION INFORMATION
Enable (EN/CTRL pin)
The EN/CTRL pin serves two functions. One is the enable and disable of the device the other is the output
sink current programming of the device. If the digital interface is not required the CTRL pin can be used as
a standard enable pin for the device. Pulling the CTRL pin high will enable the device beginning sink
current on LED pins. Pulling the CTRL pin to ground for a period of time > 480us will shutdown the device
reducing the shutdown cruuent to typical 0.1 uA.
This pin should not be left floating and need to be terminated.
Digital interface (EN/CTRL pin)
When power on the chip and pull high the EN/CTRL pin, the LED pins will start sink the initial sink current.
The maximum LED sink current is ILEDMAX (20mA). Pulling the EN/CTRL pin low for a period of time can
program the output sink current. When pulling the CTRL pin to "low" between 9 us to 30 us, the internal
controller decreases its output sink current by one step (1 mA). When pulling the CTRL pin to "low"
between 125us to 175us, the internal controller increases its output sink current by one step. There are
total 16 steps that control LED output sink current range from ILEDMAX down to ILEDMAX/4. Between the
"low" pulses, EN/CTRL should keep at "high" for at last 10 us.
Decrease One Step
Increase One Step
Time
Time
9~30us
125~175us
Hold time
Disable
Time
Time
480us
10us
Supply Voltage and Li-ion battery low warning
SM6802/3/4 works with supply voltage range from 3.0V to 5.0V. 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 discharge reaches 3.275V (normally around 1%~3% power left in the
battery). When Li-ion battery voltage is lower than the preset low level, the LED current (brightness) will
start to decrease.
Page 5
V.1.0 July 12,2007
SAMHOP Microelectronics Corp.
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION
TYPICAL OPERATION CHARACTERISTICS
Quiescent Current vs. Supply Voltage
300
250
200
150
100
50
0
3
3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9
4
4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9
5
Supply Voltage (V)
ILED vs. Supply Voltage
25
20
15
10
5
0
3
3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9
4
4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9
5
Supply Voltage (V)
Page 6
V.1.0 July 12,2007
SAMHOP Microelectronics Corp.
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION
TYPICAL OPERATION CHARACTERISTICS
ILED vs. Brightness Control
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
LED Step
ILED vs. LEDn Dropout Voltage
25
20
15
10
5
0
0.01
0.1
1
10
LEDn Dropout Voltage (V)
Page 7
V.1.0 July 12,2007
SAMHOP Microelectronics Corp.
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION
PACKAGE
Unit : mm
SM6802L Surface Mount SOT-25
θ
R
D
b
5
4
1
2
3
C
e
L2
e1
GAUGE PLANE
θ2
SYMBOL
MIN. MOM. MAX.
A
A1
A2
b
1.05
0.05
1.00
0.30
0.08
2.80
2.60
1.50
-
1.35
0.15
1.20
0.50
0.20
3.00
3.00
1.70
-
4Xθ1
y
1.10
-
c
-
2.90
D
2.80
E
1.60
E1
e
0.95 BSC.
1.90 BSC.
0.45
e1
L
0.35
0.55
L1
L2
R
0.60 REF
0.25 BSC.
-
0.10
-
-
y
-
0.10
8°
θ
0°
-
θ1
θ2
7°NOM
5°NOM
Page 8
V.1.0 July 12,2007
SAMHOP Microelectronics Corp.
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION
PACKAGE
Unit : mm
SM6803L Surface Mount SOT-26
θ
R
D
b
6
5
4
1
2
3
C
e
L2
GAUGE PLANE
e1
θ2
SYMBOL
MIN. MOM. MAX.
A
A1
A2
b
1.05
0.05
1.00
0.30
0.08
2.80
2.60
1.50
-
1.35
0.15
1.20
0.50
0.20
3.00
3.00
1.70
-
1.10
y
4Xθ1
-
c
-
2.90
D
2.80
E
1.60
E1
e
0.95 BSC.
1.90 BSC.
0.45
e1
L
0.35
0.55
L1
L2
R
0.60 REF
0.25 BSC.
-
0.10
-
-
y
-
0.10
8°
θ
0°
-
θ1
θ2
7°NOM
5°NOM
Page 9
V.02 Jan 24,2007
SAMHOP Microelectronics Corp.
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION
PACKAGE
Unit : mm
SM6804L 8 -Pin Plastic MSOP
8
5
"A"
1
4
0.30
0.65 BSC
D
GAUGE PLANE
SEATING PLANE
θ
L
L1
DETAIL A
0.05
SYMBOL MIN. MON. MAX.
A
A1
A2
D
-
-
1.10
0.15
0.95
0.00
0.75
-
0.85
3.00 BSC.
4.90 BSC.
3.00 BSC.
0.60
E
E1
L
0.40
0
0.80
8
L1
θ
0.95 REF
-
Page 10
V.1.0 July 12,2007
SAMHOP Microelectronics Corp.
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION
PACKAGE
Unit : mm
SM6803T Surface Mount TSOP 6
θ
R
D
b
6
5
4
C
1
2
3
e
L2
e1
GAUGE PLANE
θ2
SYMBOL
MIN.
0.75
0.00
0.70
0.35
0.10
MOM. MAX.
A
A1
A2
b
-
0.90
0.10
0.80
0.51
0.25
-
0.75
-
θ1
c
-
D
2.90 BSC.
2.80 BSC.
1.60 BSC.
0.95 BSC.
1.90 BSC.
-
E
E1
e
e1
L
0.37
-
L1
L2
R
0.60 REF
0.25 BSC.
-
0.10
0°
-
θ
-
8°
θ1
θ2
7°NOM
5°NOM
Page 11
V.1.0 July 12,2007
SAMHOP Microelectronics Corp.
WHITE / BLUE LED DRIVER FOR LI- ION BATTERY APPLICATION
Ordering Information
Package
SOT-25
SOT-26
TSOP 6
MSOP 8
Marking
SM6802
SM6803
SM6803T
SM6804
Part Number ( Tape and Reel )
SM6802
SM6803
SM6803T
SM6804
Lead Free Information
Package
SOT-25
Marking
Lead Free Part Number
SM6802L
SM6802L
SOT-26
TSOP 6
MSOP 8
SM6803L
SM6803T
SM6804L
SM6803L
SM6803TL
SM6804L
Green Information
Package
SOT-25
SOT-26
TSOP 6
MSOP 8
Marking
SM6802G
SM6803G
SM6803T
SM6804G
Green Part Number
SM6802G
SM6803G
SM6803TG
SM6804G
Page 12
V.1.0 July 12,2007
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