Fairchild FAN5626LX Linear led drivers with single-wire digital interface Datasheet

FAN5622 / FAN5624 / FAN5626
Linear LED Drivers with Single-Wire Digital Interface
Features
Description

Family of Three Linear Current-Sink LED Drivers that
Support 2, 4, or 6 LED Outputs

Current Sink Driver for Each LED Output:
– 30mA Maximum Output Current
– 50mV Drop-out at 15mA IOUT
– Better than 3% Matching between Channels
– External RSET
Single-Wire Digital Control Interface for Easy
Programming
– 32 Linear Steps of Dimming Control
The FAN5622, FAN5624, and FAN5626 are two-, four-, and
six-channel current-sink linear LED drivers used to backlight
the main LCD displays or keypads in mobile electronics, such
as cellular phone handsets.





Less than 1µA Shut-Down Current
Short-Circuit, Under-Voltage, and Thermal Protection
Wide Input Voltage Range: 2.7 to 5.5V
Small Form-Factor Packages:
– FAN5622: 6-Pin Super SOT23
– FAN5624: 10-Lead 1.4x1.8x0.55mm UMLP
– FAN5626: 10-Lead 1.6x2.1x0.55mm MicroPak™ MLP
A very low dropout of 50mV allows driving LEDs without any
inductors or switch capacitors. The brightness levels of the
LED outputs are programmed through single-wire digital
control interface. The user can program 32 linear dimming
steps and turn on and off the LEDs through this interface by
applying digital pulses.
The FAN562x family of linear LED drivers provides high
efficiency due to the low drop-out voltage of the LED driver.
Good matching between different channels of LED output is
provided across the entire 32 dimming steps. These LED
drivers also integrate short circuit, under-voltage, and thermal
protection to ensure for a more robust solution.
The FAN5622, FAN5624, and FAN5626 are available in very
small form-factor packages: 6-pin Super SOT23, 10-lead
UMLP, and 10-lead MicroPak™ MLP, respectively.
Applications




Mobile Handsets
Mobile Internet Devices
PMP and MP3 Players
LCD Modules
Figure 1. Typical Application of FAN5622
Ordering Information
Part Number
# of
Channels
Temperature
Range
FAN5622SX
2
-40 to 85°C
6-Lead, SUPERSOT6, JEDEC MO-193, 1.6mm Wide
Tape and Reel
FAN5624UMPX
4
-40 to 85°C
10-Lead, Ultrathin Molded Leadless Package (UMLP)
Tape and Reel
FAN5626LX
6
-40 to 85°C
10-Lead ,Micropak ,JEDEC MO255, 1.6 X 2.1mm
Tape and Reel
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
Package
Packing
www.fairchildsemi.com
FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface
January 2012
FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface
Applications Diagrams
Figure 2. FAN5624 Typical Application for 4 LEDs
Figure 3. FAN5626 Typical Application for 6 LEDs
Block Diagram
Figure 4. Block Diagram
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
www.fairchildsemi.com
2
CTRL
1
6
LED1
GND
2
5
ISET
VIN
3
4
LED2
Figure 6. FAN5624: 10-Lead UMLP, Top View
Figure 5. FAN5622: 6-Pin SSOT23, Top View
LED6
9
ISET
LED5
LED4
LED3
8
7
6
10
LED2
5
1
2
3
4
VIN
GND
CTRL
LED1
Figure 7. FAN5626: 10-Lead MicroPak™ MLP, Top View
Pin Definitions
Pin #
FAN5626
FAN5622 FAN5624
MicroPak
SSOT23-6 UMLP10
MLP10
Name
Description
3
5
1
VIN
Input Voltage. Connect to 2.7-5.5VDC input power source.
2
6
2
GND
Ground
5
3
10
ISET
LED Current Setting. Full-scale LED current is set by tying this pin
through a resistor (RSET) to GND.
1
7
3
CTRL
Control pin. Program dimming levels by driving pin with digital pulses.
This pin cannot be left floating.
6
8
4
LED1
LED Cathode #1. LED current sink output.
4
10
5
LED2
LED Cathode #2. LED current sink output.
1
6
LED3
LED Cathode #3. LED current sink output.
2
7
LED4
LED Cathode #4. LED current sink output.
8
LED5
LED Cathode #5. LED current sink output.
9
LED6
LED Cathode #6. LED current sink output.
4, 9
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
N/C
No Connect
www.fairchildsemi.com
3
FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface
Pin Configuration
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above
the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended
exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings
are stress ratings only.
Symbol
VCC
ESD
Parameter
Min.
Max.
Unit
VIN Pin
-0.3
6.0
V
Other Pins(1)
-0.3
VIN +
0.3
V
Electrostatic Discharge Protection Level
Human Body Model per JESD22-A114
3.0
kV
Charged Device Model per JESD22-C101
1.5
kV
TJ
Junction Temperature
–40
TSTG
Storage Temperature
–65
TL
Lead Soldering Temperature, 10 Seconds
+150
°C
+150
°C
+260
°C
Note:
1. Lesser of 6.0V or VIN+0.3V.
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating
conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding
them or designing to absolute maximum ratings.
Symbol
Parameter
Min.
Max.
Unit
VIN
Power Supply Voltage Range
2.7
5.5
V
TA
Operating Ambient Temperature Range
-40
+85
°C
Operating Junction Temperature Range
-40
+125
°C
5
30
mA
TJ
ILED(FS)
Full-Scale LED Current
Thermal Properties
Junction-to-ambient thermal resistance is a function of application and board layout. This data is measured with boards in
accordance to JEDEC standard JESD51. Special attention must be paid not to exceed junction temperature TJ(max) at a given
ambient temperature TA.
Symbol
JA
Parameter
Typical
Unit
Junction-to-Ambient Thermal Resistance, SSOT23-6 Package
235
°C/W
Junction-to-Ambient Thermal Resistance, UMLP10 Package(2)
287
°C/W
220
°C/W
(3)
Junction-to-Ambient Thermal Resistance, MicroPak™ MLP10 package
Notes:
2. Recommended not to exceed 132mW of maximum power dissipation.
3. Recommended not to exceed 198mW of maximum power dissipation.
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
www.fairchildsemi.com
4
FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface
Absolute Maximum Ratings
VIN = 2.7V to 5.5V, RSET = 19.10kΩ, TA = -40°C to +85°C, Vf = 2.5V to [3.5V or VIN – 0.1V], whichever is smaller. Typical values
are at TA = 25°C, VIN = 3.6V, and Vf = 3.2V.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
VIN = 3.6V, CTRL = 0
0.3
1.0
µA
FAN5622: VIN = 3.6V, ILED = 0mA
0.4
0.8
mA
FAN5624: VIN = 3.6V, ILED = 0mA
0.6
1.0
mA
FAN5626: VIN = 3.6V, ILED = 0mA
0.8
1.2
mA
1
250
nA
Power Supplies
ISD
Shutdown Supply Current
IIN
Operating Supply Current
IIH
Control Pin Input Current
CTRL = 1.8V
Under-Voltage Lockout
Threshold
VIN Rising
Full-Scale LED Output Current
ILEDx = 30mA; x = 1 to 6
Absolute Current Accuracy
VIN=2.85V – 4.5V; VCATH =0.15 to
(1.2V or VIN=2.55V, Whichever is
Smaller); Full-Scale Current 530mA, TA = 25°C
LED Current Matching(4)
ILEDx = 15mA; V_LEDx=0.4V,
TA = 25°C
VISET
ISET Drive Voltage
9.53kΩ ≤ RSET ≤ 56.2kΩ
1.20
IRATIO
Current Mirror Ratio from ISET
Pin
9.53kΩ ≤ RSET ≤ 56.2kΩ
240
∆IOUT_LOAD
IOUT Load Regulation
VIN = 3.6V, ILEDx = 15mA,
LED VF = 2.7 to 3.5V,
-3
+3
%
∆IOUT_LINE
IOUT Line Regulation
VIN = 2.7 to 4.8V, ILEDx = 15mA,
VCATH = 0.5V
-4
+4
%
VUVLO
VIN Falling
2.50
2.70
V
2.30
2.50
V
5
30
mA
-10
+10
%
-3
+3
%
2.10
Regulation
IFS_LEDx (MAX)
ILED
ILED MATCH
VDROPOUT
TSD
Dropout Voltage
Thermal Shutdown
VIN=3.6V; ILED = 15mA, -10% ILED
Drop
50
VIN=3.6V; ILED = 30mA, -10% ILED
Drop
60
Rising Temperature at Junction
150
Hysteresis
20
V
mV
°C
Logic Input (CTRL)
VIH
HIGH-Level Input Voltage
1.2
VIL
LOW-Level Input Voltage
TLO
CTRL LOW Time for Dimming
VIN = 3.6V; See Figure 17
0.5
THI
Time Delay between Steps
VIN = 3.6V; See Figure 17
0.5
TON
CTRL HIGH to Turn-On Delay
VIN = 3.6V; See Figure 17
TSD
CTRL LOW, Shutdown Pulse
Width
VIN = 3.6V; from Falling Edge of
CTRL
V
V
µs
µs
250
1
0.4
300
µs
ms
Note:
4. For the two, four, and six LED current sinks of FAN5622, FAN5624, and FAN5626 respectively; the following are
determined: the maximum sink current of the two, four, and six LED outputs (MAX); the minimum sink current of the two,
four, and six outputs (MIN); and the average sink current (AVG). For all of the LED outputs, two matching numbers are
calculated: (MAX-AVG)/ AVG and (AVG-MIN)/AVG. The largest number of the two (worst case) is considered the
matching figure for the part. The matching figure for a given part is considered to be the highest matching figure of all LED
outputs. The typical specification provided is the most likely norm of the matching figure for all parts.
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
www.fairchildsemi.com
5
FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface
Electrical Specifications
Figure 8. Efficiency vs. Input Voltage where LED VF=3.2V
Figure 9. Dropout Voltage vs. Input Voltage
Figure 10. Current Match of Channels vs. Input Voltage
Figure 11. Load Regulation at 15mA/Output
Figure 12. Shutdown Current vs. Input Voltage
Figure 13. Quiescent Current vs. Input Voltage
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
www.fairchildsemi.com
6
FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface
Typical Performance Characteristics
Figure 14. Startup Waveform for FAN5626
Figure 15. Shutdown Waveform for FAN5626
Figure 16. Dimming Operation
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
www.fairchildsemi.com
7
FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface
Typical Performance Characteristics
The FAN5622, FAN5624, and FAN5626 are a family of
current-sink linear LED driver ICs able to drive two, four, and
six LEDs respectively. These three devices are powered
directly from 2.7V to 5.5V supply and all the channels are
controlled via the integrated current sinks from the external
power source. Designed with a very low drop-out voltage, the
FAN562x products can operate close to the input supply
voltage without the need for additional inductive boost or
capacitive switching circuitry.
Table 2 outlines the dimming levels while Figure 17 shows
how to change the dimming levels.
Table 2. Brightness Control Levels (RSET = 19.10kΩ)
All three devices require only two additional discrete passive
components: a single 1µF input ceramic capacitor and a
resistor (RSET) to set the maximum current for the LEDs. Each
current-sink output provides constant current and can drive
the LEDs up to 30mA. Fairchild Semiconductor’s TinyWire™
single-wire digital interface enables these LED drivers to
program the brightness level of the LEDs in 32 linear steps.
Dimming Level
Current Level
ILED (mA)
1
1.67%
0.25
2
3.33%
0.50
3
5.00%
0.75
4
6.67%
1.00
5
10.00%
1.50
6
13.33%
2.00
7
16.67%
2.50
8
20.00%
3.00
9
23.33%
3.50
10
26.67%
4.00
11
30.00%
4.50
12
33.33%
5.00
13
36.67%
5.50
14
40.00%
6.00
15
43.33%
6.50
16
46.67%
7.00
17
50.00%
7.50
18
53.33%
8.00
19
56.67%
8.50
20
60.00%
9.00
21
63.33%
9.50
22
66.67%
10.00
23
70.00%
10.50
24
73.33%
11.00
Digital Interface & Dimming Control
25
76.67%
11.50
The FAN5622, FAN5624, and FAN5626 implement a simple
single-wire digital interface to program the LED brightness to
one of thirty two (32) levels spaced in linear steps. To maintain
the brightness of the LEDs at a specific dimming level, the
digital pulse signal to the CTRL pin should be held HIGH for
that last pulse. It is held HIGH for as long as desired to keep
the LEDs illuminated at that specific brightness level.
26
80.00%
12.00
27
83.33%
12.50
28
86.67%
13.00
29
90.00%
13.50
30
93.33%
14.00
31
96.67%
14.50
32
100.00%
15.00
Setting Maximum Current
The maximum LED current of the FAN5622, FAN5624, and
FAN5626 is programmed by an external resistor called RSET.
The maximum full-scale LED current for all three LED drivers
is 30mA and it can go as low as 5mA. The FAN562x products
also operate below 5mA full-scale LED current by using a
larger RSET value. However, the LED channel accuracy and
matching specifications are guaranteed. Table 1 shows the
RSET resistor values for several full-scale current levels.
Table 1. Maximum LED Current Settings by Resistor
ILED (mA)
RSET (kΩ)
5
56.20
10
28.70
15
19.10
20
14.30
25
11.50
30
9.53
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
www.fairchildsemi.com
8
FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface
Circuit Description
FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface
Digital Dimming Control
Figure 17. Digital Pulse Dimming Control Diagram
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
www.fairchildsemi.com
9
FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface
Physical Dimensions
Figure 18. 6-Lead SSOT23
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without
notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most
recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which
covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/.
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
www.fairchildsemi.com
10
FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface
Physical Dimensions (Continued)
1.40
0.15 C
A
1.70
B
2X
(9X)
0.563
0.663
1
2.10
1.80
PIN#1 IDENT
0.40
0.15 C
TOP VIEW
0.55 MAX.
0.10 C
(10X) 0.225
2X
RECOMMENDED
LAND PATTERN
0.152
1.45
0.08 C
0.55
SEATING C
PLANE
0.05
SIDE VIEW
9X
0.45
0.40
1.85
0.35
(9X)
0.45
3
(10X) 0.225
6
DETAIL A
OPTIONAL MINIMIAL
TOE LAND PATTERN
0.40
1
NOTES:
PIN#1 IDENT
A. PACKAGE DOES NOT FULLY CONFORM TO
JEDEC STANDARD.
B. DIMENSIONS ARE IN MILLIMETERS.
C. DIMENSIONS AND TOLERANCES PER
ASME Y14.5M, 1994.
D. LAND PATTERN RECOMMENDATION IS
BASED ON FSC DESIGN ONLY.
E. DRAWING FILENAME: MKT-UMLP10Arev3.
0.15
(10X)
0.25
10
BOTTOM VIEW
0.55
0.45
0.10 C A B
0.05 C
0.10
0.10
0.10
DETAIL A
SCALE : 2X
PACKAGE
EDGE
LEAD
OPTION 1
SCALE : 2X
LEAD
OPTION 2
SCALE : 2X
Figure 19. 10-Lead, Ultrathin Molded Leadless Package (UMLP)
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without
notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most
recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which
covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/.
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
www.fairchildsemi.com
11
0.10 C
2.10
2X
A
1.62
B
KEEPOUT ZONE, NO TRACES
OR VIAS ALLOWED
(0.11)
1.12
1.60
PIN1 IDENT IS
2X LONGER THAN
OTHER LINES
0.56
0.10 C
(0.35) 10X
2X
TOP VIEW
(0.25) 10X
0.50
RECOMMENDED LAND PATTERN
0.55 MAX
0.05 C
0.05 C
0.05
0.00
C
(0.20)
0.35
0.25
SIDE VIEW
D
0.65
0.55
DETAIL A
0.35
0.25
1
4
0.35
0.25
DETAIL A 2X SCALE
0.56
5
10
(0.29)
(0.15)
(0.36)
6
9
0.50
0.25 9X
0.15
1.62
0.35 9X
0.25
0.10
0.05
C A B
C
ALL FEATURES
BOTTOM VIEW
NOTES:
A. PACKAGE CONFORMS TO JEDEC
REGISTRATION MO-255, VARIATION UABD .
B. DIMENSIONS ARE IN MILLIMETERS.
C. DIMENSIONS AND TOLERANCES PER
ASME Y14.5M, 1994.
D. PRESENCE OF CENTER PAD IS PACKAGE
SUPPLIER DEPENDENT. IF PRESENT IT
IS NOT INTENDED TO BE SOLDERED AND
HAS A BLACK OXIDE FINISH.
E. DRAWING FILENAME: MKT-MAC10Arev5.
Figure 20. 10-Lead MicroPak™ MLP
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without
notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most
recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which
covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/.
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
www.fairchildsemi.com
12
FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface
Physical Dimensions (Continued)
FAN5622 / FAN5624 / FAN5626 — Linear LED Drivers with Single-Wire Digital Interface
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
www.fairchildsemi.com
13
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