|
|
PDF FAN5702 Data sheet ( Hoja de datos )
| Número de pieza | FAN5702 | |
| Descripción | 6-Channel LED Driver | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de FAN5702 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
April 2010
FAN5702
Configurable 180mA 6-LED Driver with I2C Control
Features
Six (6) Parallel LEDs (up to 30mA Each)
Total Package Load Current Capability: 180mA
Group from 2 to 6 LEDs for Flexible Backlighting
I2C Interface for Easy Programming
>600:1 Dimming Ratio for 100Hz PWM Frequency
Logarithmically Controlled Dimming with 64 Steps
Secondary Brightness Control Using PWM Dimming
up to 20kHz in Conjunction with I2C Dimming
− Dynamic Backlight Control (DBC) to Reduce Current
Consumption
Up to 92% Efficiency
Built-in 1.5x Charge Pump with Low Drop-Out Bypass
Switch and automatic switching to 1x mode
1.2MHz Switching Frequency for Small-Sized Capacitors
16-Bump 1.6mm × 1.6mm WLCSP (0.6mm Height)
16-Lead 3.0mm x 3.0mm UMLP (0.55mm Height)
Applications
LCD Backlighting
Mobile Handsets / Smartphones
Portable Media Players
Description
The FAN5702 is a highly integrated and configurable charge-
pump-based multi-LED driver. The device can drive up to six
LEDs in parallel with a total output current of 180mA.
Regulated internal current sinks deliver excellent current and
brightness matching to all LEDs.
The FAN5702 has an I2C interface that allows the user to
independently control the brightness with a default grouping of
2,1,1,1,1 for a maximum of five independent lighting channels.
The LED driver can be programmed in a multitude of
configurations to address broad lighting requirements for
different platforms. Each LED can be configured through I2C
as five independent channels (Group A has two LEDs by
default) or any additional LEDs can join Group A to increase
the backlighting needs as the display size increases. The
device offers a second dimming control using the EN/PWM
pin. Applying a PWM dimming signal to this pin allows control
of the dimming of Group A LEDs so that the average current is
the linear value multiplied by the PWM dimming duty-cycle.
The device provides excellent efficiency, without an inductor,
by operating the charge pump in 1.5x or pass-through mode.
The FAN5702 can be ordered with default ISET values of
30mA, 20mA, 15mA, or 8mA. The default ISET is always
determined by the ISET ordered (see Ordering Information).
Ordering Information
Part Number
FAN5702UC30X
FAN5702UC20X
FAN5702UC15X
FAN5702UC08X
FAN5702UMP30X (Preliminary)
FAN5702UMP20X (Preliminary)
FAN5702UMP15X (Preliminary)
FAN5702UMP08X (Preliminary)
LED Current
(ISET)
30mA
20mA
15mA
8mA
30mA
20mA
15mA
8mA
Temperature
Range
-40 to 85°C
-40 to 85°C
-40 to 85°C
-40 to 85°C
-40 to 85°C
-40 to 85°C
-40 to 85°C
-40 to 85°C
Package
WLCSP-16, 0.4mm Pitch
WLCSP-16, 0.4mm Pitch
WLCSP-16, 0.4mm Pitch
WLCSP-16, 0.4mm Pitch
UMLP-16, 3.0 x 3.0 x 0.55mm
UMLP-16, 3.0 x 3.0 x 0.55mm
UMLP-16, 3.0 x 3.0 x 0.55mm
UMLP-16, 3.0 x 3.0 x 0.55mm
Packing
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.2
www.fairchildsemi.com
1 page  
www.DataSheet4U.com
Absolute Maximum Ratings
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
Parameter
VIN, VOUT Pins
VCC Other Pins(1)
ESD
Electrostatic Discharge
Protection Level
Human Body Model per JESD22-A114
Charged Device Model per JESD22-C101
TJ
TSTG
TL
Junction Temperature
Storage Temperature
Lead Soldering Temperature, 10 Seconds
Note:
1. Lesser of VIN + 0.3 or 6.0V.
Min.
–0.3
–0.3
–40
–65
Max.
6.0
VIN + 0.3
3
2
+150
+150
+260
Units
V
V
kV
°C
°C
°C
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
VIN
VLED
TA
TJ
Supply Voltage
LED Forward Voltage
Ambient Temperature
Junction Temperature
Parameter
Min.
2.7
2
–40
–40
Max.
5.5
4
+85
+125
Units
V
V
°C
°C
Thermal Properties
Symbol
Parameter
Min.
Typ. Max. Units
ΘJA Junction-to-Ambient Thermal Resistance
WLCSP
UMLP
80
°C/W
49
Note:
2. Junction-to-ambient thermal resistance is a function of application and board layout. This data is measured with four-layer
2s2p boards in accordance to JESD51-7 JEDEC standard. Special attention must be paid not to exceed junction
temperature TJ(max) at a given ambient temperate TA.
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.2
5
www.fairchildsemi.com
5 Page 
www.DataSheet4U.com
Circuit Description
The FAN5702 is a white LED driver system based on an
adaptive 1.5x charge pump capable of supplying up to 180mA
of total output current. The tightly matched current sinks
ensure uniform brightness between the LEDs. Each LED has
a common anode configuration with its peak drive current set
during manufacturing (see
I2C-compatible interface is
Ordering Information and ISET). An
used to vary the brightness within
the individual current sinks as well as configure the grouping.
Each LED is controlled with 64 exponentially spaced analog
brightness control levels through I2C, as indicated in Table 1.
For maximum flexibility, the FAN5702 can be programmed
with five independently controlled LED banks; by default,
arranged as 2,1,1,1,1 (first two LEDs represent Group A).
Through I2C, the device can be reconfigured to add up to six
LEDs to Group A as needed by application requirements.
Charge Pump
The charge pump operates in either 1x mode, where VOUT is
connected to VIN through a bypass switch, or in 1.5x mode.
The circuit operates in 1x mode until the LED with the highest
forward voltage (VLED(MAX)) can no longer maintain current
regulation. At that point, 1.5x mode begins. If the lowest active
cathode voltage is greater than 1.8V, the charge pump
switches back to 1x mode.
IC Enable
By default the General Purpose register bit 7 = 0, the EN pin
functions as enable/disable. When the EN pin is LOW, all
circuit functions, including I2C, are disabled and the registers
are set to their default values.
When the EN pin HIGH, I2C interface is enabled. The LEDs
can be turned on/off by writing to the General Purpose
register. The user can always communicate via I2C with the
device to change register settings regardless of whether any
LED is on or off.
PWM Dimming
By programming the General Purpose register bit 7 = 1, the
EN pin is reappropriated to a PWM dimming input. Applying a
PWM signal to this pin controls the LED current waveform to
be ON when the PWM dimming pin is HIGH and OFF when
the PWM dimming pin is LOW. By using this pin in conjunction
with the I2C register dimming, the part can achieve higher
dimming resolution. For instance, an 8-bit PWM dimming
signal applied along with the 6-bit register dimming yields
better than 14 bits of resolution
To change the PWM dimming pin back to the EN function, set
the General Purpose register bit 7 to 0.
Register Controlled Brightness
The DC value of the LED current is modulated according to
the values in Table 1. Current is expressed as a percentage of
the full scale current and is illustrated with a 20mA ISET.
Table 1. Brightness Control
Dimming Code (Bx5-Bx0)
000000
000001
000010
000011
000100
000101
000110
000111
001000
001001
001010
001011
001100
001101
001110
001111
010000
010001
010010
010011
010100
010101
010110
010111
011000
011001
011010
011011
011100
011101
011110
011111
100000
100001
100010
100011
100100
100101
100110
100111
101000
101001
101010
101011
101100
101101
101110
101111
110000
110001
110010
110011
110100
110101
110110
110111
111000
111001
111010
111011
111100
111101
111110
111111
Current Level
0.125%
0.188%
0.249%
0.312%
0.374%
0.438%
0.499%
0.560%
0.622%
0.692%
0.750%
0.810%
0.875%
0.938%
1.004%
1.124%
1.250%
1.375%
1.499%
1.625%
1.750%
1.881%
2.063%
2.249%
2.438%
2.687%
2.939%
3.186%
3.562%
3.936%
4.310%
4.813%
5.314%
5.936%
6.565%
7.313%
8.059%
8.938%
9.876%
10.874%
12.005%
13.253%
14.618%
16.124%
17.881%
19.875%
22.121%
24.621%
27.376%
30.373%
33.623%
37.124%
40.873%
44.875%
49.124%
53.624%
58.375%
63.378%
68.625%
74.122%
79.874%
85.873%
92.373%
100.000%
ILED (mA) (ISET=20mA)
0.025
0.038
0.050
0.063
0.075
0.088
0.100
0.113
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.225
0.250
0.275
0.300
0.325
0.350
0.375
0.413
0.450
0.488
0.538
0.588
0.638
0.713
0.788
0.863
0.963
1.063
1.188
1.313
1.463
1.613
1.788
1.975
2.175
2.400
2.650
2.925
3.225
3.575
3.975
4.425
4.925
5.475
6.075
6.725
7.425
8.175
8.975
9.825
10.725
11.675
12.675
13.725
14.825
15.975
17.175
18.475
20.000
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.2
11
www.fairchildsemi.com
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet FAN5702.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| FAN5701 | Compact 6-Channel LED Driver | Fairchild Semiconductor |
| FAN5702 | 6-Channel LED Driver | Fairchild Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |