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 The FAN5611/FAN5612/FAN5613/FAN5614 driver family
" Ultra-low voltage drop (< 300mV) to support direct provides matched current source bias for white, blue or any
Li-ion applications color LEDs. The current in the LEDs can be programmed by
" No EMI, no switching noise an external resistor. The individual LED currents are 200 x
" No external components needed for current matching I , where I is the current through the external resistor
SET SET
" Both analog and PWM brightness control connected to the CTRL pin. The FAN5611 and the FAN5613
" FAN5611, FAN5613 feature up to 160mA bias current are capable of driving four LEDs, while the FAN5612 can
(up to 40mA for each LED) drive three LEDs. The FAN5614 is designated to drive two
" FAN5612 features up to 120mA bias current (up to 40mA high current LEDs. In any case, at least I1 should be always
for each LED) connected to an LED in order to have the other LEDs driven
" FAN5614 features up to 160mA bias current (up to 80mA with a matched current to I1.
for each LED)
" Enable/Shutdown control (FAN5612, FAN5613, The FAN5612, FAN5613 and FAN5614 have Enable pin.
FAN5614) When these devices are disabled, the supply current drops to
" Shutdown current < 1µA less than 1µA.
" Small footprint SC-70 and 2x2 MLP
The FAN5611, FAN5612 and FAN5614 drivers are available
in a 6-lead SC-70 package. The FAN5613 is available in an
Applications
8-lead MLP package.
" Cell Phones
" PDA, DSC, MP3 Players
" Handheld Computers
" LCD Display Modules
" Keyboard Backlight
" LED Displays
Typical Applications
VIN
VIN VIN
ISET
ISET I4 I3 I2 I1 ISET I3 I2 I1 VCONTROL (3V) I4 I3 I2 I1
CTRL
VCONTROL (3V) VCONTROL (3V)
RSET
CTRL
CTRL
FAN5612
FAN5611 FAN5613
RSET RSET
ON/OFF
ON/OFF ENABLE
ENABLE
GND GND
GND
Four Diode Control With ON/OFF
Four Diode Control Three Diode Control with ON/OFF
VIN
I1/I2 I3/I4
ISET
VCONTROL (3V)
CTRL
FAN5614
RSET
ON/OFF
ENABLE
GND
Two Diode Control with ON/OFF
REV. 1.0.4 6/4/04
FAN5611/FAN5612/FAN5613/FAN5614 PRODUCT SPECIFICATION
Pin Assignments
CTRL ON/OFF CTRL 1 6 ON/OFF
1 6
I3
CTRL 1 6
I3 2 5 I3/I4
I2 2 5 I1/I2
I2 2 5 I4
3 4
I1
4 3 4 GND GND
N/C
I1 3 GND
FAN5612
FAN5614
FAN5611
6-LEAD SC-70 PACKAGE
TOP VIEW
ON/OFF NC
I3 CTRL
I4 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 CTRL Sets LED Current
ON/OFF Chip ON/OFF/Disable
2I2I2 Connect to Cathode of LED
I3 Connect to Cathode of LED
I1/I2
I1 I1 Connect to Cathode of LED
3
I4 Connect to Cathode of LED
N/C No Connection
4 GND GND GND GND Ground
5I4 Connect to Cathode of LED
I3 Connect to Cathode of LED
I1 Connect to Cathode of LED
I3/I4 Connect to Cathode of LED
6I3 Connect to Cathode of LED
ON/OFF ON/OFF Chip ON/OFF/Disable
I2 Connect to Cathode of LED
7 CTRL Sets LED Current
8NC No Connection
2 REV. 1.0.4 6/4/04
PRODUCT SPECIFICATION FAN5611/FAN5612/FAN5613/FAN5614
Absolute Maximum Ratings (Note1)
Parameter Min Max Unit
V , V , V , V and ENABLE Voltage to GND -0.3 6 V
I1 I2 I3 I4
CTRL Voltage to GND -0.3 3
Power Dissipated by package at T = 85°C 6 Lead-SC70 190 mW
A
8 Lead-MLP2X2 700
I1, I2, I3, I4 Steady State Current FAN5611/12/13 40 mA
I1/I2, I3/I4 Steady State Current FAN5614 80
Lead Temperature (Soldering 10 seconds) 300 °C
Junction Temperature 150 °C
Storage Temperature -55 150 °C
Electrostatic Discharge Protection (ESD) Level HBM 4 kV
(Note2)
CDM 1
Recommended Operating Conditions
Parameter Min Typ Max Unit
LED Cathode Voltage FAN5611, FAN5612, FAN5613 0.3 0.5 1 V
FAN5614 0.15
Ambient Temperature -40 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 (V = 3.3V to 5.5V, ENABLE = V , T = 25°C Unless otherwise noted)
IN IN A
Parameter Conditions Min. Typ. Max. Units
Output Current FAN5611/12/13 I = 100µA 140 200 260
SET
Multiplication Ratio V = 300mV
SAT
FAN5614 I = 100µA
SET
V = 150mV
SAT
LED Current (Per Diode) FAN5611/12/13 V = 300mV 20 mA
SAT
I = 100µA
SET
FAN5614 V = 150mV
SAT
I = 100µA
SET
LED to LED Current FAN5611/12/13 V = 300mV -3 3 %
SAT
Matching I = 100µA
SET
T = -40°C to
A
85°C
FAN5614 V = 150mV
SAT
I = 100µA
SET
T = -40°C to
A
85°C
Peak Efficiency V = 3V 90 %
IN
Current in OFF Mode (I and I ) V = 0V 1 µA
SET I EN
Min. ENABLE ON Voltage (Note3) I = 150µA 3 V
SET
(FAN5612, FAN5613, FAN5614)
Max. ENABLE OFF Voltage (Note3) 0.5 V
(FAN5612, FAN5613 FAN5614)
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
Cathode Voltage = 0.3V
22
150
20
18 100
For ISET = 0.1mA
16
50
14
For ISET = 0.05mA
0
12
-40 -20 0 20 40 60 80 100 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
Ambient Temperature (°C)
VCTRL (V)
FAN5611_12_13 FAN5614
LED Current vs. LED Cathode Voltage LED Current vs. LED Cathode Voltage
30
35
30
25
For ISET = 100µA
For ISET = 50µA
25
20
20
15
15
For ISET = 25µA
10 10
For ISET = 50µA
0 5
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 22
Cathode Voltage = 0.3V
20
20
VCONTROL = 3V
18
18
16
16
Cathode Voltage = 0.5V 14
14
12
12
Cathode Voltage = 0.6V
10
10
8
8
6
Cathode Voltage = 0.4V
6
4 VCONTROL = 3V
4 2
0 20 40 60 80 100 120 140 160 20 40 60 80 100
Set Resistor (K&!) Set Resistor (K&!)
REV. 1.0.4 6/4/04 5
SET
I
(µA)
Output Current (mA)
LED Current (mA)
LED Current (mA)
LED Current (mA)
LED Current (mA)
0.25V
0.20V
0.3V
Cathode
Voltage = 0.15V
Cathode Voltage
=
0.10V
Cathode
Voltage = 0.05V
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
(10mA/div)
(20mA/div)
LED Current
LED Current
(2V/div)
(2V/div)
CTRL Voltage
Enable Voltage
PRODUCT SPECIFICATION FAN5611/FAN5612/FAN5613/FAN5614
Application Information Application Notes
The ultra-low voltage drop across the FAN561X series of
Setting the LED Current
LED drivers, allow the devices to drive white, blue, and
The current flowing into LEDs is approximately 200 times
other color LEDs in a wide range of input voltages. The
greater then the current I . The LED current is controlled
SET
driver can be used in many applications. Although, only
by V and R according to the formula:
CONTROL SET
the FAN5613 is shown in all three examples, any of
the FAN561X series of LED drivers can be used in the
ILED = 200 × (VCONTROL VCTRL) D RSET
applications presented in this document, due to their
similar operation.
For V = 3V and a specified LED current, the R
CONTROL SET
value can be evaluated using the diagram shown in the Typi-
Example 1: Drive low V white or blue LEDs
F
cal Performance Characteristics section. For any other
directly from single cell Li-ion
option, I value can be determined using the graph I
SET SET
When using white or blue low V LEDs, and utilizing the
F
vs. V . The LED s brightness can also be adjusted by
CTRL
drivers low voltage drop, only 3.4V in V is needed for the
IN
driving ENABLE or the CTRL pin with a PWM signal. The
full 20mA LED current. At 3.1V, there is still 5mA typical
driving signal frequency should be greater than 100Hz to
current available for the LEDs. The single cell Li-ion is
avoid flickering, increasing to more than 1MHz, if necessary.
utilized in most applications like cell phones or digital still
cameras. In most cases, the Li-ion battery voltage level only
LEDs are very sensitive to temperature. In most cases the
goes down to 3.0V voltage level, and not down to the full
maximum allowed junction temperature is 100°C. This tem-
discharge level (2.7V) before requesting the charger.
perature is the result of adding to the ambient temperature
the over temperature due to power dissipation, is described
VIN
by as follows:
Tj = TA + ÅšjA × I × VF
ISET
I3
I4 I2
I1
VCONTROL
where T is the LED junction temperature, T is the ambient
j A
CTRL
temperature, Åš is the junction to ambient thermal resis-
jA
RSET
FAN5613
tance, I is the LED current and V is the LED forward
F
ON/OFF
voltage.
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
V < 0.3V
DROP
"LED Current vs. LED Cathode Voltage" graph under the
V < 3.1V (Low V )
F (at 20mA) F
Typical Performance Characteristics section.
V =V + V = 3.4V
IN (at 20mA) DROP F
V ~ 3.1V
IN (at 5mA Typical)
Efficiency Considerations
The FAN561X driver s low dropout architecture can signifi-
Where V = Single cell Li-ion Voltage
IN
cantly improve the efficiency compared to using simple
ballast resistors. The system efficiency, defined as the ratio
Key advantages:
between the LEDs power and the input supplied power can
" No boost circuit needed for the LCD or keyboard
be calculated as follows:
backlight
" Drivers directly connected to a Li-ion battery
Efficiency = (VIN VCATHODE) D VIN
" No EMI, no switching noise, no boost efficiency lost, no
capacitor, and no inductor.
The lower the V , the higher the system efficiency.
CATHODE
Efficiency can be further improved using a higher V with
IN
Example 2: Drive high V white or blue LEDs
F
more LEDs as shown in example 3.
from existing bus from 4.0V to 5.5V
High V white or blue LEDs have forward voltage drop in
F
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, Key advantage:
which can be utilized. Due to the ultra-low voltage drop of
" No need for current matching resistors and discrete
the FAN561X series of LED drivers to drive high V white
F
transistor for brightness control
or blue LEDs. The V needs to be only 300mV higher than
IN
the highest V in the circuit.
F
LED Brightness Control
All of the FAN561X LED Drivers feature analog and PWM
VIN
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
ISET
I3
I4 I2 determine the value of R , use the I vs. V graph
I1 SET SET CTRL
VCONTROL
CTRL
under the Typical Performance Characteristics section.
RSET
FAN5613
1. FAN5611
ON/OFF
ENABLE
GND
VIN
V < 0.3V
DROP
ISET I4 I3 I2 I1
V < 3.3V to 4.0V (High V )
F (at 20mA) F
VCONTROL (3V)
CTRL
V =V + V = 3.6V to 4.3V
IN (at 20mA) DROP F
FAN5611
RSET
V ~ 3.3V
IN (at 5mA Typical)
GND
Where V = Existing bus = 3.3V to 4.3V
IN
Key advantages:
- Analog
" No boost circuit needed for LCD or keyboard backlight
Set V and R for LED current
CONTROL SET
" Driver utilizes the existing bus
" Ultra-low voltage drop provides the full 20mA LED
200 × (VCONTROL VCTRL)
ILED = -------------------------------------------------------------------------
current at the lowest possible voltage level.
RSET
Example 3: Drive white, blue, red, amber LEDs
- PWM
string
V = PWM
CONTROL
Assuming boost circuit, or existing voltage bus, the
FAN561X series of LED drivers can be used to drive a whole
Amplitude sets maximum LED current
string of LEDs and flexible brightness control - analog
Pulse width controls between 0 and maximum
and/or PWM.
2. FAN5612
VIN
VIN
'N' number of LEDs Per Branch
ISET I3 I2 I1
VCONTROL
CTRL
ISET I4 I3 I2 I1 FAN5612
VCONTROL RSET
CTRL
ON/OFF
RSET FAN5613
ENABLE
GND
ENABLE
ON/OFF
GND
- Analog
V < 0.3V Set V and R for LED current
DROP CONTROL SET
V = N × V + V
IN_MIN F DROP
V = N × V + 5.5V - PWM - 1
IN _MAX F
200 × (VCONTROL VCTRL)
Where V = Existing bus, boost voltage
IN ILED = -------------------------------------------------------------------------
RSET
V = PWM
CONTROL
8 REV. 1.0.4 6/4/04
PRODUCT SPECIFICATION FAN5611/FAN5612/FAN5613/FAN5614
Amplitude sets maximum LED current - Analog
Pulse width controls between 0 and maximum
Set V and R for LED current
CONTROL SET
- PWM - 2 200 × (VCONTROL VCTRL)
ILED = -------------------------------------------------------------------------
Set V and R for maximum LED current RSET
CONTROL SET
ILED <" 200 × ISET
- PWM - 1
V = PWM
CONTROL
ON/OFF = PWM
Amplitude sets maximum LED current
Amplitude has no effect on current
Pulse width controls between 0 and maximum
Pulse width controls between 0 and maximum
- PWM - 2
3. FAN5613
Set V and R for maximum LED current
CONTROL SET
VIN
ILED <" 200 × ISET
200 × (VCONTROL VCTRL)
ILED = -------------------------------------------------------------------------
ISET
RSET
I3
I4 I2
VCONTROL I1
CTRL
RSET
FAN5613 ON/OFF = PWM
ON/OFF
ENABLE
VSS
Amplitude has no effect on current
Pulse width controls between 0 and maximum
- Analog
Set V and R for LED current
CONTROL SET
200 × (VCONTROL VCTRL)
ILED = -------------------------------------------------------------------------
RSET
- PWM - 1
V = PWM
CONTROL
Amplitude sets maximum LED current
Pulse width controls between 0 and maximum
- PWM - 2
Set V and R for maximum LED current
CONTROL SET
ILED <" 200 × ISET
ON/OFF = PWM
Amplitude has no effect on current
Pulse width controls between 0 and maximum
4. FAN5614
VIN
I1/I2 I3/I4
ISET
VCONTROL
CTRL
FAN5614
RSET
ON/OFF
ENABLE
VSS
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
1.40
B
5
8
2X
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
RECOMMENDED LAND PATTERN
0.10 C
(0.20)
0.08 C
0.05
C
0.00
SEATING SIDE VIEW
PLANE
1.25
PIN #1 IDENT
1.20
1 4
0.45
0.20
0.65
0.60
85
0.18~0.30
0.50 M
0.10 C A B
1.50 M
0.10 C
BOTTOM VIEW
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
2.00 Ä… 0.20 0.65
0.50 MIN
64
B
1.25 Ä… 0.10 1.90
13
0.30
(0.25)
0.40 MIN
0.15
1.30
M
0.10 A B
0.65
LAND PATTERN RECOMMENDATION
1.30
SEE DETAIL A
1.00
0.80
1.10
0.80
C
0.10
C
0.00
(0.43)
SEATING
2.10 Ä…0.30
PLANE
GAGE
PLANE
NOTES: UNLESS OTHERWISE SPECIFIED
(R0.10)
A) THIS PACKAGE CONFORMS TO EIAJ
SC-88A, 1996.
0.25
B) ALL DIMENSIONS ARE IN MILLIMETERS.
0.10
C) DIMENSIONS DO NOT INCLUDE BURRS
0.20
OR MOLD FLASH.
0.45
30°
0.30
0°
DETAIL A
SCALE: 2X
REV. 1.0.4 6/4/04 11
FAN5611/FAN5612/FAN5613/FAN5614 PRODUCT SPECIFICATION
Ordering Information
Product Number Package Type Order Code
FAN5611 6-Lead SC-70 FAN5611S7X
FAN5612 6-Lead SC-70 FAN5612S7X
FAN5613 2mm x 2mm 8-Lead MLP FAN5613MPX
FAN5614 6-Lead SC-70 FAN5614S7X
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 2. A critical component in any component of a life support
which, (a) are intended for surgical implant into the body, device or system whose failure to perform can be
or (b) support or sustain life, and (c) whose failure to reasonably expected to cause the failure of the life support
perform when properly used in accordance with device or system, or to affect its safety or effectiveness.
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
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6/4/04 0.0m 005
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