FAN5611 [FAIRCHILD]
Low-Dropout LED Drivers for White, Blue or any Color LED; 低压差LED驱动器为白色，蓝色或彩色LED
| 型号： | FAN5611 |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Low-Dropout LED Drivers for White, Blue or any Color LED |
| 文件： | 总12页 (文件大小：168K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
www.fairchildsemi.com
FAN5611/FAN5612/FAN5613/FAN5614
Low-Dropout LED Drivers for White, Blue or any
Color LED
Features
General Description
• LED Drivers for parallel-connected LEDs
• Ultra-low voltage drop (< 300mV) to support direct
Li-ion applications
The FAN5611/FAN5612/FAN5613/FAN5614 driver family
provides matched current source bias for white, blue or any
color LEDs. The current in the LEDs can be programmed by
an external resistor. The individual LED currents are 200 x
ISET, where ISET is the current through the external resistor
connected to the CTRL pin. The FAN5611 and the FAN5613
are capable of driving four LEDs, while the FAN5612 can
drive three LEDs. The FAN5614 is designated to drive two
high current LEDs. In any case, at least I1 should be always
connected to an LED in order to have the other LEDs driven
with a matched current to I1.
• No EMI, no switching noise
• No external components needed for current matching
• Both analog and PWM brightness control
• FAN5611, FAN5613 feature up to 160mA bias current
(up to 40mA for each LED)
• FAN5612 features up to 120mA bias current (up to 40mA
for each LED)
• FAN5614 features up to 160mA bias current (up to 80mA
for each LED)
• Enable/Shutdown control (FAN5612, FAN5613,
FAN5614)
• Shutdown current < 1µA
• Small footprint SC-70 and 2x2 MLP
The FAN5612, FAN5613 and FAN5614 have Enable pin.
When these devices are disabled, the supply current drops to
less than 1µA.
The FAN5611, FAN5612 and FAN5614 drivers are available
in a 6-lead SC-70 package. The FAN5613 is available in an
8-lead MLP package.
Applications
• Cell Phones
• PDA, DSC, MP3 Players
• Handheld Computers
• LCD Display Modules
• Keyboard Backlight
• LED Displays
Typical Applications
V
IN
V
V
IN
IN
I
SET
I3
I2
I4
I3
I2
I1
I3
I2
I4
CTRL
I1
I1
V
(3V)
I
CONTROL
I
SET
SET
V
(3V)
V
(3V)
CONTROL
CONTROL
R
SET
CTRL
CTRL
FAN5612
FAN5611
GND
FAN5613
GND
R
SET
R
SET
ON/OFF
ENABLE
ON/OFF
ENABLE
GND
Four Diode Control With ON/OFF
Four Diode Control
Three Diode Control with ON/OFF
V
IN
I1/I2
I3/I4
I
SET
V
(3V)
CONTROL
CTRL
FAN5614
R
SET
ON/OFF
BLE
ENA
GND
Two Diode Control with ON/OFF
REV. 1.0.4 6/4/04
FAN5611/FAN5612/FAN5613/FAN5614
PRODUCT SPECIFICATION
Pin Assignments
CTRL
I2
CTRL
I1/I2
N/C
ON/OFF
I3/I4
1
2
3
6
5
4
ON/OFF
I3
1
2
3
6
5
4
I3
CTRL
I2
1
2
3
6
I4
5
4
I1
GND
GND
GND
I1
FAN5612
FAN5614
FAN5611
6-LEAD SC-70 PACKAGE
TOP VIEW
ON/OFF
NC
I3
I4
CTRL
I2
GND
I1
FAN5613
2x2mm 8-LEAD MLP PACKAGE
Pin Description (6-Lead SC-70 and 8-Lead MLP)
Pin Name
Pin No. FAN5611 FAN5612 FAN5613 FAN5614
Description
1
CTRL
CTRL
I2
CTRL
Sets LED Current
ON/OFF
I3
Chip ON/OFF/Disable
2
I2
Connect to Cathode of LED
Connect to Cathode of LED
I1/I2
I1
I1
Connect to Cathode of LED
Connect to Cathode of LED
No Connection
3
I4
N/C
4
5
GND
I4
GND
I3
GND
GND
Ground
Connect to Cathode of LED
Connect to Cathode of LED
Connect to Cathode of LED
Connect to Cathode of LED
Connect to Cathode of LED
I1
I3/I4
6
I3
ON/OFF
ON/OFF Chip ON/OFF/Disable
Connect to Cathode of LED
Sets LED Current
I2
7
8
CTRL
NC
No Connection
2
REV. 1.0.4 6/4/04
PRODUCT SPECIFICATION
FAN5611/FAN5612/FAN5613/FAN5614
Absolute Maximum Ratings (Note1)
Parameter
Min
-0.3
-0.3
Max
6
Unit
VI1, VI2, VI3, VI4 and ENABLE Voltage to GND
CTRL Voltage to GND
V
3
Power Dissipated by package at TA = 85°C
6 Lead-SC70
8 Lead-MLP2X2
FAN5611/12/13
FAN5614
190
700
40
mW
mA
I1, I2, I3, I4 Steady State Current
I1/I2, I3/I4 Steady State Current
Lead Temperature (Soldering 10 seconds)
Junction Temperature
80
300
150
150
°C
°C
°C
kV
Storage Temperature
-55
4
Electrostatic Discharge Protection (ESD) Level
(Note2)
HBM
CDM
1
Recommended Operating Conditions
Parameter
Min
0.3
Typ
Max
Unit
LED Cathode Voltage
FAN5611, FAN5612, FAN5613
FAN5614
0.5
1
V
0.15
-40
Ambient Temperature
25
85
°C
Notes:
1. Functional operation under these conditions is NOT implied. Performance and reliability are guaranteed only if Operating
Conditions are not exceeded.
2. Using Mil Std. 883E, method 3015.7(Human Body Model) and EIA/JESD22C101-A (Charge Device Model)
REV. 1.0.4 6/4/04
3
FAN5611/FAN5612/FAN5613/FAN5614
PRODUCT SPECIFICATION
DC Electrical Characteristics (VIN = 3.3V to 5.5V, ENABLE = VIN, TA = 25°C Unless otherwise noted)
Parameter
Conditions
Min.
Typ.
Max.
Units
Output Current
Multiplication Ratio
FAN5611/12/13
ISET = 100µA
VSAT = 300mV
140
200
260
FAN5614
ISET = 100µA
VSAT = 150mV
LED Current (Per Diode) FAN5611/12/13 VSAT = 300mV
ISET = 100µA
20
mA
%
FAN5614
VSAT = 150mV
ISET = 100µA
LED to LED Current
Matching
FAN5611/12/13 VSAT = 300mV
SET = 100µA
-3
3
I
TA = -40°C to
85°C
FAN5614
VSAT = 150mV
ISET = 100µA
TA = -40°C to
85°C
Peak Efficiency
VIN = 3V
90
%
Current in OFF Mode (ISET and I )
VEN = 0V
1
3
µA
V
I
Min. ENABLE “ON Voltage” (Note3)
(FAN5612, FAN5613, FAN5614)
ISET = 150µA
Max. ENABLE “OFF Voltage” (Note3)
(FAN5612, FAN5613 FAN5614)
0.5
V
Notes:
3. ENABLE “ON” is V for which I >20mA @ V =0.3V, while ENABLE “OFF” is V for which I <1µA @ V >0.3V
EN
I1
I1
EN
I1
I1
4
REV. 1.0.4 6/4/04
PRODUCT SPECIFICATION
FAN5611/FAN5612/FAN5613/FAN5614
Typical Performance Characteristics
FAN5611_12_13
Output Current vs. Temperature
ISET vs. VCTRL
24
200
150
100
50
Cathode Voltage = 0.3V
22
20
18
For ISET = 0.1mA
16
14
For ISET = 0.05mA
12
0
0.0
-40
-20
0
20
40
60
80
100
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
Ambient Temperature (°C)
V
CTRL
(V)
FAN5611_12_13
FAN5614
LED Current vs. LED Cathode Voltage
LED Current vs. LED Cathode Voltage
30
35
30
25
20
15
10
5
25
20
15
For ISET = 100µA
For ISET = 50µA
For ISET = 25µA
10
0
For ISET = 50µA
0.0
0.2
0.4
0.6
0.8
1.0
0.0
0.2
0.4
0.6
0.8
1.0
LED Cathode Voltage (V)
LED Cathode Voltage (V)
FAN5611_12_13
FAN5614
LED Current vs. Set Resistor
LED Current vs. Set Resistor
22
20
18
16
14
12
10
8
22
20
18
16
14
12
10
8
Cathode Voltage = 0.3V
VCONTROL = 3V
Cathode Voltage = 0.5V
Cathode Voltage = 0.6V
6
Cathode Voltage = 0.4V
6
4
VCONTROL = 3V
20
2
4
0
20
40
60
80
100
120
140
160
40
60
80
100
Set Resistor (KΩ)
Set Resistor (KΩ)
REV. 1.0.4 6/4/04
5
FAN5611/FAN5612/FAN5613/FAN5614
PRODUCT SPECIFICATION
Typical Performance Characteristics (cont.)
FAN5611_12_13_14
FAN5612_13_14
Control Voltage Transient Response
Enable Voltage Transient Response
Time (1µs/div)
Time (1µs/div)
6
REV. 1.0.4 6/4/04
PRODUCT SPECIFICATION
FAN5611/FAN5612/FAN5613/FAN5614
Application Information
Application Notes
The ultra-low voltage drop across the FAN561X series of
LED drivers, allow the devices to drive white, blue, and
other color LEDs in a wide range of input voltages. The
driver can be used in many applications. Although, only
the FAN5613 is shown in all three examples, any of
the FAN561X series of LED drivers can be used in the
applications presented in this document, due to their
similar operation.
Setting the LED Current
The current flowing into LEDs is approximately 200 times
greater then the current ISET. The LED current is controlled
by VCONTROL and RSET according to the formula:
ILED = 200 × (VCONTROL – VCTRL) ⁄ RSET
For VCONTROL = 3V and a specified LED current, the RSET
value can be evaluated using the diagram shown in the Typi-
cal Performance Characteristics section. For any other
option, ISET value can be determined using the graph ISET
vs. VCTRL. The LED’s brightness can also be adjusted by
driving ENABLE or the CTRL pin with a PWM signal. The
driving signal frequency should be greater than 100Hz to
avoid flickering, increasing to more than 1MHz, if necessary.
Example 1: Drive low V white or blue LEDs
F
directly from single cell Li-ion
When using white or blue low VF LEDs, and utilizing the
drivers low voltage drop, only 3.4V in VIN is needed for the
full 20mA LED current. At 3.1V, there is still 5mA typical
current available for the LEDs. The single cell Li-ion is
utilized in most applications like cell phones or digital still
cameras. In most cases, the Li-ion battery voltage level only
goes down to 3.0V voltage level, and not down to the full
discharge level (2.7V) before requesting the charger.
LEDs are very sensitive to temperature. In most cases the
maximum allowed junction temperature is 100°C. This tem-
perature is the result of adding to the ambient temperature
the over temperature due to power dissipation, is described
by as follows:
V
IN
Tj = TA + ΘjA × I × VF
I
SET
I3
I2
I4
I1
VCONTROL
where Tj is the LED junction temperature, TA is the ambient
temperature, ΘjA is the junction to ambient thermal resis-
tance, I is the LED current and VF is the LED forward
voltage.
CTRL
R
FAN5613
SET
ON/OFF
ENABLE
GND
The FAN5611 to FAN5614 are designed to reduce the
current through LEDs, when the temperature rises and the
cathode voltage increases, as can be seen from typical the
"LED Current vs. LED Cathode Voltage" graph under the
Typical Performance Characteristics section.
– VDROP < 0.3V
– VF (at 20mA) < 3.1V (Low VF)
– VIN (at 20mA) =VDROP + VF = 3.4V
– VIN (at 5mA Typical) ~ 3.1V
Efficiency Considerations
The FAN561X driver’s low dropout architecture can signifi-
cantly improve the efficiency compared to using simple
ballast resistors. The system efficiency, defined as the ratio
between the LEDs power and the input supplied power can
be calculated as follows:
Where VIN = Single cell Li-ion Voltage
Key advantages:
• No boost circuit needed for the LCD or keyboard
backlight
• Drivers directly connected to a Li-ion battery
• No EMI, no switching noise, no boost efficiency lost, no
capacitor, and no inductor.
Efficiency = (VIN – VCATHODE) ⁄ VIN
The lower the VCATHODE, the higher the system efficiency.
Efficiency can be further improved using a higher VIN with
more LEDs as shown in example 3.
Example 2: Drive high V white or blue LEDs
F
from existing bus from 4.0V to 5.5V
High VF white or blue LEDs have forward voltage drop in
the range of 3.2V to 4.0V. To drive these LEDs with the
maximum current of 20mA for maximum brightness, usually
requires a boost circuit for a single cell Li-ion voltage range.
REV. 1.0.4 6/4/04
7
FAN5611/FAN5612/FAN5613/FAN5614
PRODUCT SPECIFICATION
In some cases, there is already a voltage bus in the system,
which can be utilized. Due to the ultra-low voltage drop of
the FAN561X series of LED drivers to drive high VF white
or blue LEDs. The VIN needs to be only 300mV higher than
the highest VF in the circuit.
Key advantage:
• No need for current matching resistors and discrete
transistor for brightness control
LED Brightness Control
All of the FAN561X LED Drivers feature analog and PWM
controls to give designers flexible brightness control. These
control methods can be applied to the circuit in two different
ways, to provide more flexibility than any other solution. To
determine the value of RSET, use the “ISET vs. VCTRL” graph
under the Typical Performance Characteristics section.
V
IN
I
SET
I3
I2
I4
CTRL
I1
VCONTROL
R
FAN5613
SET
1. FAN5611
ON/OFF
ENABLE
GND
V
IN
– VDROP < 0.3V
I4
I3
I2
I1
I
SET
– VF (at 20mA) < 3.3V to 4.0V (High VF)
– VIN (at 20mA) =VDROP + VF = 3.6V to 4.3V
– VIN (at 5mA Typical) ~ 3.3V
VCONTROL (3V)
CTRL
FAN5611
GND
R
SET
Where VIN = Existing bus = 3.3V to 4.3V
Key advantages:
• No boost circuit needed for LCD or keyboard backlight
• Driver utilizes the existing bus
- Analog
Set VCONTROL and RSET for LED current
• Ultra-low voltage drop provides the full 20mA LED
current at the lowest possible voltage level.
200 × (V
– VCTRL)
ILED = ------------------------C---O----N----T---R----O----L---------------------------
RSET
Example 3: Drive white, blue, red, amber LEDs
string
Assuming boost circuit, or existing voltage bus, the
FAN561X series of LED drivers can be used to drive a whole
string of LEDs and flexible brightness control - analog
and/or PWM.
- PWM
VCONTROL = PWM
– Amplitude sets maximum LED current
– Pulse width controls between 0 and maximum
2. FAN5612
V
IN
V
IN
'N' number of LEDs Per Branch
I3
I2
I1
I
SET
VCONTROL
CTRL
I
FAN5612
SET
I4
I3
I2
I1
VCONTROL
R
SET
CTRL
ON/OFF
R
FAN5613
GND
SET
ENABLE
GND
ENABLE
ON/OFF
- Analog
– VDROP < 0.3V
Set VCONTROL and RSET for LED current
– VIN_MIN = N × VF + VDROP
– VIN _MAX = N × VF + 5.5V
- PWM - 1
200 × (V
– VCTRL)
ILED = ------------------------C---O----N----T---R----O----L---------------------------
Where VIN = Existing bus, boost voltage
RSET
VCONTROL = PWM
8
REV. 1.0.4 6/4/04
PRODUCT SPECIFICATION
FAN5611/FAN5612/FAN5613/FAN5614
– Amplitude sets maximum LED current
– Pulse width controls between 0 and maximum
- Analog
Set VCONTROL and RSET for LED current
- PWM - 2
200 × (V
– VCTRL)
ILED = ------------------------C---O----N----T---R----O----L---------------------------
RSET
Set VCONTROL and RSET for maximum LED current
ILED ∼ 200 × ISET
- PWM - 1
VCONTROL = PWM
ON/OFF = PWM
– Amplitude sets maximum LED current
– Pulse width controls between 0 and maximum
– Amplitude has no effect on current
– Pulse width controls between 0 and maximum
- PWM - 2
3. FAN5613
Set VCONTROL and RSET for maximum LED current
V
IN
ILED ∼ 200 × ISET
200 × (V
– VCTRL)
ILED = ------------------------C---O----N----T---R----O----L---------------------------
I
SET
RSET
I3
I2
I4
I1
VCONTROL
CTRL
R
SET
FAN5613
ON/OFF = PWM
ON/OFF
ENABLE
V
– Amplitude has no effect on current
SS
– Pulse width controls between 0 and maximum
- Analog
Set VCONTROL and RSET for LED current
200 × (V
– VCTRL)
ILED = ------------------------C---O----N----T---R----O----L---------------------------
RSET
- PWM - 1
VCONTROL = PWM
– Amplitude sets maximum LED current
– Pulse width controls between 0 and maximum
- PWM - 2
Set VCONTROL and RSET for maximum LED current
ILED ∼ 200 × ISET
ON/OFF = PWM
– Amplitude has no effect on current
– Pulse width controls between 0 and maximum
4. FAN5614
V
IN
I1/I2
I3/I4
I
SET
VCONTROL
CTRL
FAN5614
R
SET
ON/OFF
ENABLE
V
SS
REV. 1.0.4 6/4/04
9
FAN5611/FAN5612/FAN5613/FAN5614
PRODUCT SPECIFICATION
Mechanical Dimensions
2mmx 2mm 8-Lead MLP
2.0
A
0.15 C
2X
1.40
B
5
8
2.55
1.00
2.0
0.70
(0.78)
0.15
C
1
4
2X
TOP VIEW
0.30 TYP
0.50 TYP
1.0 MAX
0.10 C
RECOMMENDED LAND PATTERN
(0.20)
C
0.08
C
0.05
0.00
SEATING
PLANE
SIDE VIEW
1.25
1.20
PIN #1 IDENT
1
4
0.45
0.20
0.65
0.60
8
5
0.18~0.30
0.50
M
0.10 C A B
1.50
BOTTOM VIEW
M
0.10
C
NOTES:
A. CONFORMS TO JEDEC REGISTRATION MO-229,
VARIATION VCCD-3, DATED 11/2001
B. DIMENSIONS ARE IN MILLIMETERS.
C. DIMENSIONS AND TOLERANCES PER
ASME Y14.5M, 1994
10
REV. 1.0.4 6/4/04
PRODUCT SPECIFICATION
FAN5611/FAN5612/FAN5613/FAN5614
Mechanical Dimensions
6-Lead SC-70 Package
SYMM
C
L
0.65
2.00 0.20
0.50 MIN
6
1
4
3
B
1.25 0.10
1.90
0.30
0.15
(0.25)
0.40 MIN
1.30
M
0.10
A B
0.65
LAND PATTERN RECOMMENDATION
SEE DETAIL A
1.30
1.00
0.80
1.10
0.80
C
0.10
0.00
C
(0.43)
SEATING
PLANE
2.10 0.30
GAGE
PLANE
NOTES: UNLESS OTHERWISE SPECIFIED
(R0.10)
A) THIS PACKAGE CONFORMS TO EIAJ
SC-88A, 1996.
B) ALL DIMENSIONS ARE IN MILLIMETERS.
C) DIMENSIONS DO NOT INCLUDE BURRS
OR MOLD FLASH.
0.25
0.10
0.20
0.45
0.30
30°
0°
DETAIL A
SCALE: 2X
REV. 1.0.4 6/4/04
11
FAN5611/FAN5612/FAN5613/FAN5614
PRODUCT SPECIFICATION
Ordering Information
Product Number
FAN5611
Package Type
6-Lead SC-70
Order Code
FAN5611S7X
FAN5612S7X
FAN5613MPX
FAN5614S7X
FAN5612
6-Lead SC-70
FAN5613
2mm x 2mm 8-Lead MLP
6-Lead SC-70
FAN5614
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO
ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME
ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;
NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
6/4/04 0.0m 005
Stock#DS30005611
2004 Fairchild Semiconductor Corporation
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