Fairchild FAN5702UMP08X Configurable 180ma 6-led driver with i2c control Datasheet

FAN5702
Configurable 180mA 6-LED Driver with I2C Control
Features
Description
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ƒ
ƒ
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ƒ
ƒ
ƒ
The FAN5702 is a highly integrated and configurable chargepump-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.
Six (6) Parallel LEDs (up to 30mA Each)
Total Package Load Current Capability: 180mA
Group from 2 to 6 LEDs for Flexible Backlighting
2
I C Interface for Easy Programming
2
>600:1 Dimming Ratio for 100Hz PWM Frequency
Logarithmically Controlled Dimming with 64 Steps
Secondary Brightness Control Using PWM Dimming
2
up to 20kHz in Conjunction with I C Dimming
− Dynamic Backlight Control (DBC) to Reduce Current
Consumption
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ƒ
Up to 92% Efficiency
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ƒ
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1.2MHz Switching Frequency for Small-Sized Capacitors
Built-in 1.5x Charge Pump with Low Drop-Out Bypass
Switch and automatic switching to 1x mode
16-Bump 1.6mm × 1.6mm WLCSP (0.6mm Height)
16-Lead 3.0mm x 3.0mm UMLP (0.55mm Height)
Applications
ƒ
ƒ
ƒ
The FAN5702 has an I C 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
2
different platforms. Each LED can be configured through I C
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).
LCD Backlighting
Mobile Handsets / Smartphones
Portable Media Players
Ordering Information
Part Number
LED Current
(ISET)
Temperature
Range
FAN5702UC30X
30mA
-40 to 85°C
WLCSP-16, 0.4mm Pitch
Tape and Reel
FAN5702UC20X
20mA
-40 to 85°C
WLCSP-16, 0.4mm Pitch
Tape and Reel
FAN5702UC15X
15mA
-40 to 85°C
WLCSP-16, 0.4mm Pitch
Tape and Reel
FAN5702UC08X
8mA
-40 to 85°C
WLCSP-16, 0.4mm Pitch
Tape and Reel
FAN5702UMP30X
30mA
-40 to 85°C
UMLP-16, 3.0 x 3.0 x 0.55mm
Tape and Reel
FAN5702UMP20X
20mA
-40 to 85°C
UMLP-16, 3.0 x 3.0 x 0.55mm
Tape and Reel
FAN5702UMP15X
15mA
-40 to 85°C
UMLP-16, 3.0 x 3.0 x 0.55mm
Tape and Reel
FAN5702UMP08X
8mA
-40 to 85°C
UMLP-16, 3.0 x 3.0 x 0.55mm
Tape and Reel
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
Package
Packing
www.fairchildsemi.com
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
August 2010
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
Typical Application
Figure 1. Typical Application
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com
2
A1
A2
A3
A4
A4
A3
A2
A1
B1
B2
B3
B4
B4
B3
B2
B1
C1
C2
C3
C4
C4
C3
C2
C1
D1
D2
D3
D4
D4
D3
D2
D1
Bumps Facing Down
Bumps Facing Up
Figure 2. WLCSP-16, 0.4mm Pitch, 1.61 x 1.61mm
Pin Definitions
Pin #
Name
Description
D2
VIN
Input Supply Voltage. Connect to 2.7 – 5.5VDC input power source.
B4
GND
Ground
Charge Pump Output Voltage. Connect to LED anodes.
D1
VOUT
D3 ,D4
C1+, C1–
Charge pump flying capacitor #1
C3, C4
C2+, C2–
Charge pump flying capacitor #2
A1,A2
B1,B2
C1,C2
D2A, D1A
D4,D3
D6,D5
LED Outputs
A4
EN / PWM
Enable / PWM dimming input. By default, this pin acts as a simple enable / disable function.
When this pin is HIGH, normal operation is enabled. When LOW, the IC is reset and all functions
2
(including I C communications) are disabled. By setting General Purpose register bit 7 = 1, the pin
functions as a PWM dimming input for Group A. To restore the Enable function, the General
Purpose register bit 7 must be set LOW.
B3
SDA
I C interface serial data
A3
SCL
I C interface serial clock
2
2
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com
3
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
WLCSP Pin Configuration
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
UMLP Pin Configuration
Bottom View
Figure 3. UMLP-16, 0.5mm Pitch, 3mm x 3mm
Pin Definitions
Pin #
Name
Description
11
VIN
Input Supply Voltage. Connect to 2.7 – 5.5VDC input power source.
6
GND
Ground
12
VOUT
Charge Pump Output Voltage. Connect to LED anodes.
10,9
C1+, C1–
Charge pump flying capacitor #1
8,7
C2+, C2–
Charge pump flying capacitor #2
1, 2
15, 16
13, 14
D2A, D1A
D4,D3
D6,D5
LED Outputs
4
EN / PWM
Enable / PWM dimming input. By default, this pin acts as a simple enable / disable function.
When this pin is HIGH, normal operation is enabled. When LOW, the IC is reset and all functions
2
(including I C communications) are disabled. By setting General Purpose register bit 7 = 1, the pin
functions as a PWM dimming input for Group A. To restore the Enable function, the General
Purpose register bit 7 must be set LOW.
5
SDA
I C interface serial data
3
SCL
I C interface serial clock
2
2
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com
4
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
Parameter
VIN, VOUT Pins
Other Pins
(1)
Min.
Max.
Units
–0.3
6.0
V
–0.3
VIN + 0.3
V
Human Body Model per JESD22-A114
3
Charged Device Model per JESD22-C101
2
ESD
Electrostatic Discharge
Protection Level
TJ
Junction Temperature
–40
+150
°C
TSTG
Storage Temperature
–65
+150
°C
+260
°C
TL
Lead Soldering Temperature, 10 Seconds
kV
Note:
1. Lesser of VIN + 0.3 or 6.0V.
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
Parameter
Supply Voltage
Min.
Max.
Units
2.7
5.5
V
VLED
LED Forward Voltage
2
4
V
TA
Ambient Temperature
–40
+85
°C
TJ
Junction Temperature
–40
+125
°C
Typ.
Max.
Units
Thermal Properties
Symbol
ΘJA
Parameter
Min.
Junction-to-Ambient Thermal Resistance
WLCSP
80
UMLP
49
°C/W
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. 1.0.3
www.fairchildsemi.com
5
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
Absolute Maximum Ratings
Unless otherwise specified: VIN = 2.7V to 5.5V; TA = -40°C to +85°C; and ENA, EN3, EN4, EN5, and EN6 = 1. Typical values are
VIN = 3.6V, TA = 25°C, ILED = 20mA, and LED cathode terminals = 0.4V. Circuit and components are according to Figure 1.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
Power Supplies and Thermal Protection
1.5x Mode, No LEDs
4.4
mA
1x Mode, No LEDs
0.3
mA
IQ
Quiescent Supply Current
ISD
Shutdown Supply Current
EN = 0, VIN = 4.5V, TA = -40°C to +85°C
0.1
2.0
μA
VUVLO
Under-Voltage Lockout
Threshold
VIN Rising
2.55
2.70
V
VUVHYST
VIN Falling
2.20
2.40
V
Under-Voltage Lockout
Hysteresis
150
mV
TLIMIT
Thermal Shutdown
150
°C
THYST
Thermal Shutdown Hysteresis
20
°C
LED Current Sinks
ILED
ILED(MAX)
ILED_MATCH
Absolute Current Accuracy
(3)
Maximum Diode Current
LED Current Matching
(4)
VDTH
1x to 1.5x Gain Transition
Threshold
VHR
Current Sink Headroom
(5)
VCATHODE=0.4V; see options for ISET
–10%
ISET
+10%
mA
ILED = ISET
30
VCATHODE = 0.4V, ILED = ISET
0.4
LED Cathode Voltage Falling
100
mV
ILED = 90% ILED(NOMINAL)
65
mV
mA
3.0
%
PWM Dimming
fPWM
PWM Switching Frequency
tON_LED(MINIMUM) = 15µs
DPWM
PWM Duty-Cycle
fPWM = 100Hz
0.15
20
kHz
100.00
%
Charge Pump
ROUT
fSW
tSTART
Output Resistance
1.5x Mode
2.4
Ω
1x Mode
0.9
Ω
Switching Frequency
Startup Time
0.9
VOUT = 90% of VIN
1.2
1.5
MHz
μs
250
Logic Inputs (EN, SDA, SCL)
VIH
HIGH-Level Input Voltage
VIL
LOW-Level Input Voltage
VIMAX
IIN
1.2
Maximum Input Voltage
Input Bias Current
Input Tied to GND or VIN
V
0.4
V
1.8
5.5
V
0.01
1.00
μA
Notes:
3. The maximum total output current for the IC should be limited to 180mA. The total output current can be split between the
two groups (IDxA = IDxB = 30mA maximum). Under maximum output current conditions, special attention must be given
to input voltage and LED forward voltage to ensure proper current regulation. See the Maximum Output Current section of
the datasheet for more information.
4. For the two groups of current sinks on a part (group A and group B), the following are determined: the maximum sink
current in the group (MAX), the minimum sink current in the group (MIN), and the average sink current of the group (AVG).
For each group, two matching numbers are calculated: (MAX-AVG)/AVG and (AVG-MIN)/AVG. The largest number of the
two (worst case) is considered the matching value for the group. The matching value for a given part is considered to be
the highest matching value of the two groups. The typical specification provided is the most likely norm of the matching
value for all parts.
5. For each Dxx pin, headroom voltage is the voltage across the internal current sink connected to that pin. VHRx = VOUT VLED. If headroom voltage requirement is not met, LED current regulation is compromised.
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com
6
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
Electrical Specifications
VIN = 3.6V, TA = 25°C, ILED = 20mA, and LED cathode terminals = 0.4V.
Figure 4. Efficiency with LED Current of 8mA and 20mA
Figure 5. LED Current Match for all 6 LED Channels
at ILED=20mA.
Figure 6. LED Current Variation vs. Temperature
Figure 7. Shutdown Current vs. Input Voltage
Figure 8. Switching Frequency over Temperature
with LED Current at 20mA
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com
7
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
Typical Characteristics
VIN = 3.6V, TA = 25°C, ILED = 20mA, and LED cathode terminals = 0.4V.
Figure 9. Mode Transition from 1x to 1.5x Mode Using
PWM Control (VCATHODE Ramp Up) at 2% Duty Cycle
Figure 10. Mode Transition from 1.5x to 1x Mode Using
PWM Control (VCATHODE Ramp Down) at 2% Duty Cycle
Figure 11. Line Transient Response in 1x Mode,
VIN=3.6V – 4.2V, ILEDx=20mA
Figure 12. Line Transient Response in 1.5x Mode,
VIN=2.7V – 3.3V, ILED=20mA
Figure 13. Line Transient from 1x to 1.5x Mode,
VIN=3.2V – 4.1V, ILEDx=20mA
Figure 14. Soft-Start with SDA and SCL
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com
8
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
Typical Characteristics
2
Figure 15. Linear Dimming via I C Interface, VIN=3.6V,
ILEDx=20mA, and tRAMP=6.4ms
Figure 16. PWM Dimming, VIN=3.6V, ILEDx=20mA, and
EN=1kHz with 20% Duty Cycle
2
Figure 17. PWM and Linear (via I C) Dimming, VIN=3.6V,
ILEDx=20mA, and EN=1kHz with 20% Duty Cycle
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com
9
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
Typical Characteristics
Guaranteed by design.
Symbol
Parameter
Conditions
fSCL
SCL Clock Frequency
tBUF
Bus-Free Time between STOP and START Conditions
tHD;STA
SCL LOW Period
tHIGH
SCL HIGH Period
Repeated START Setup Time
tSU;DAT
Data Setup Time
tHD;DAT
Data Hold Time
tRCL
SCL Rise Time
tFCL
SCL Fall Time
tRDA
SDA Rise Time
tFDA
SDA Fall Time
tSU;STO
Standard mode
4.7
Fast Mode
1.3
Units
kHz
μs
4
μs
Fast Mode
600
ns
Standard Mode
4.7
μs
Fast Mode
1.3
ns
4
μs
Fast Mode
600
ns
Standard Mode
4.7
μs
600.0
ns
Standard Mode
250
ns
Fast Mode
100
ns
Standard Mode
0
3.45
μs
Fast Mode
0
900.00
ns
Standard Mode
20+0.1CB
1000
ns
Fast Mode
20+0.1CB
300
ns
Standard Mode
20+0.1CB
300
ns
Fast Mode
20+0.1CB
300
ns
Standard Mode
20+0.1CB
1000
ns
Fast Mode
20+0.1CB
300
ns
Standard Mode
20+0.1CB
300
ns
Fast Mode
20+0.1CB
300
ns
Standard Mode
Stop Condition Setup Time
CB
100
400
Fast Mode
(6)
Max.
Fast Mode
Standard Mode
tSU;STA
Typ.
Standard Mode
Standard Mode
START or Repeated START Hold Time
tLOW
Min.
Fast Mode
μs
4
600
Capacitive Load for SDA and SCL
ns
400
pF
Note:
6. Rise time of SCL after a repeated START condition and after an ACK bit.
Timing Diagram
tF
tSU;STA
tBUF
SDA
tR
SCL
tLOW
tHD;STA
TSU;DAT
tHD;STO
tHIGH
tHD;DAT
tHD;STA
REPEATED
START
START
STOP
START
2
Figure 18. I C Interface Timing for Fast and Slow Modes
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com
10
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
I2C Timing Specifications
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 Ordering Information and ISET). An
2
I C-compatible interface is 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
2
brightness control levels through I C, 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).
2
Through I C, the device can be reconfigured to add up to six
LEDs to Group A as needed by application requirements.
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
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
2
circuit functions, including I C, are disabled and the registers
are set to their default values.
2
When the EN pin HIGH, I C interface is enabled. The LEDs
can be turned on/off by writing to the General Purpose
2
register. The user can always communicate via I C 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
2
with the I C 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.
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
Dimming Code (Bx5-Bx0)
Current Level
ILED (mA) (ISET=20mA)
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
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%
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
www.fairchildsemi.com
11
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
Circuit Description
Register Addressing
When changing the group A brightness, the IC steps through
the brightness table at rate programmed by the RAMP
register, indicated in Table 2.
The FAN5702 has six user-accessible registers.
2
Table 4. I C Register Addresses
Default Value
Table 2. Group A Brightness Ramp Control
RAMP[1:0] Time per Step
Full-Scale Ramp Time
Address
7
6
5
4
3
2
1
0
HEX
00
0.1ms
6.4ms
GENERAL
0
0
0
0
0
0
0
0
10
01
25ms
1600ms
CONFIG
0
0
0
0
0
0
0
0
20
10
50ms
3200ms
CHA
1
1
1
1
1
1
1
1
A0
6400ms
CH3
1
1
1
1
1
1
1
1
30
CH4
1
1
1
1
1
1
1
1
40
CH5
1
1
1
1
1
1
1
1
50
CH6
1
1
1
1
1
1
1
1
60
11
100ms
VOUT Short-Circuit Protection
The FAN5702 has integrated protection circuitry to prevent the
device from being short circuited when the output voltage falls
below 2V. If this occurs, FAN5702 turns off the charge pump
and the LED driver outputs, but a small bypass switch is left
on. The device monitors the output voltage to determine if it is
still in short circuit condition and, once it has passed, softstarts and returns to normal operation.
Note:
7. Bold identifies bits that cannot be overwritten.
Bus Timing
As shown in Figure 19, data is normally transferred when SCL
is LOW. Data is clocked in to the FAN5702 on the rising edge
of SCL. Typically, data transitions shortly at or after the falling
edge of SCL to allow ample time for the data to set up before
the next SCL rising edge.
VOUT Over-Voltage Protection
If the output voltage goes above 6V, the FAN5702 shuts down
until this condition has passed. The charge pump and LED
driver outputs are turned off. Once this condition has passed
FAN5702 soft-starts into normal operation.
Data change allowed
SDA
I2C Interface
TH
The FAN5702’s serial interface is compatible with standard
2
and fast I C bus specifications. The FAN5702’s SCL line is an
input and its SDA line is a bi-directional open-drain output,
meaning that it can only pull down the bus when active. The
SDA line only pulls LOW during data reads and when
signaling ACK. All data is shifted in MSB (bit 7) first.
Figure 19. Data Transfer Timing
Each bus transaction begins and ends with SDA and SCL
HIGH. A transaction begins with a START condition, which is
defined as SDA transitioning from 1 to 0 with SCL HIGH, as
shown in Figure 19.
Slave Address
The FAN5702’s slave address is 6CH.
SDA
2
Table 3. I C Slave Address
7
6
5
4
3
2
1
0
0
1
1
0
1
1
0
R/ W
TSU
SCL
THD;STA
Slave Address
MS Bit
SCL
Figure 19. Start Bit
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com
12
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
Brightness Ramp Control
Slave Releases
Master Drives
tHD;STO
ACK(0) or
NACK(1)
SDA
Slave Releases
tSU;STA
tHD;STA
ACK(0) or
NACK(1)
SDA
SLADDR
MS Bit
SCL
SCL
Figure 20. Stop Bit
Figure 21 Repeated Start Timing
Read and Write Transactions
The following figures outline the sequences for data read and write. Bus control is signified by the shading of the packet, defined
as
Master Drives Bus
Slave Drives Bus
and
. All addresses and data are MSB first.
2
Table 5. I C bit Definitions for Figure 22 and Figure 23.
Symbol
Definition
S
START. See Figure 19.
A
ACK. The slave drives SDA to 0 to acknowledge the preceding packet.
A
NACK. The slave sends a 1 to NACK the preceding packet.
R
Repeated START. See Figure 21.
P
STOP. See Figure 20.
7 bits
S
Slave Address
0
0
8 bits
0
8 bits
0
A
Reg Addr
A
Data
A
P
Figure 22. Write Transaction
7 bits
S
Slave Address
0
0
8 bits
0
A
Reg Addr
A
7 bits
R
Slave Address
1
0
8 bits
1
A
Data
A
P
Figure 23. Read Transaction
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com
13
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
During a read from the FAN5702 (Figure 23), the master
issues a “Repeated Start” after sending the register address
and before resending the slave address. The “Repeated Start”
is a 1-to-0 transition on SDA while SCL is HIGH, as shown in
Figure 21.
A transaction ends with a STOP condition, which is defined as
SDA transitioning from 0 to 1 with SCL HIGH, as shown in
Figure 20.
2
The following tables define the operation of each register bit. Bold values are power-up defaults. These values apply only to I C
version of the part.
Bit
Default
Value
Name
GENERAL
Default: 00H
Description
General Purpose Register
ADDR = 10H
7
PWM
0
Setting this bit=1 changes the EN pin to function as a PWM dimming input for
group A LEDs. This bit must be set to zero for the chip to be disabled.
6,5
FS1, FS2
00
00=20mA (default), 01=30mA, 10=15mA, 11=8mA when I C is used.
4
EN6
0
Default=0 (Off), LED Channel Active=1
3
EN5
0
Default=0 (Off), LED Channel Active=1
2
EN4
0
Default=0 (Off), LED Channel Active=1
1
EN3
0
Default=0 (Off), LED Channel Active=1
0
ENA
CONFIG
0
Default: 00H
2
Default=0 (Off), LED Channel Active=1
Configuration Register
ADDR = 20H
7
T56
0
Tie channel 5 and 6 together. Default=0 (Separate). Group 5&6 =1. Both currents
are set by CH5 register. T56 is overwritten by either S5A or S6A.
6
T34
0
Tie channel 3 and 4 together. Default=0 (Separate). Group 3&4 =1. Both currents
are set by the CH3 register. T34 is overwritten by either S3A or S4A.
5
S6A
0
CH6 group configuration. Independent=0 (default); part of group A=1.
4
S5A
0
CH5 group configuration. Independent=0 (default); part of group A=1.
3
S4A
0
CH4 group configuration. Independent=0 (default); part of group A=1.
2
S3A
0
CH3 group configuration. Independent=0 (default); part of group A=1.
1,0
RS1, RS0
00
Sets current ramp rate for group A channels
CHA
Default: FFH
7:6
Reserved
11
5:0
Brightness A
0 – 63
00 – 3FH
CH3
Default:
7:6
Reserved
11
5:0
Brightness 3
0 – 63
00 – 3FH
CH4
Default: FFH
7:6
Reserved
11
5:0
Brightness 4
0 – 63
00 – 3FH
CH5
7:6
5:0
CH6
Default: FFH
Reserved
11
Brightness 5
0 – 63
00 – 3FH
Default: FFH
7:6
Reserved
11
5:0
Brightness 6
0 – 63
00 – 3FH
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
Group A Brightness Control
ADDR = A0H
2
Vendor ID bits. These bits can be used to distinguish between vendors via I C.
Writing to these bits does not change their value.
6-bit value that controls group A brightness per values in Table 1
Channel 3 Brightness Control
ADDR=30H
Writing to these bits does not change their value.
6-bit value that controls channel 3 brightness per values in Table 1
Channel 4 Brightness Control
ADDR = 40H
Writing to these bits does not change their value.
6-bit value that controls channel 3 brightness per values in Table 1
Channel 5 Brightness Control
ADDR = 50H
Writing to these bits does not change their value.
6-bit value that controls channel 3 brightness per values in Table 1
Channel 6 Brightness Control
ADDR = 60H
Writing to these bits does not change their value.
6-bit value that controls channel 3 brightness per values in Table 1
www.fairchildsemi.com
14
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
Register Descriptions
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
Physical Dimensions
0.03 C
2X
E
F
A
B
0.40
A1
BALL A1
INDEX AREA
(Ø0.20)
Cu Pad
D
0.40
(Ø0.30) Solder
Mask Opening
0.03 C
2X
RECOMMENDED LAND PATTERN
(NSMD PAD TYPE)
TOP VIEW
0.06 C
0.625
0.547
0.05 C
C
SEATING
PLANE
0.378±0.018
0.208±0.021
E
SIDE VIEWS
D
NOTES:
A. NO JEDEC REGISTRATION APPLIES.
0.005
B. DIMENSIONS ARE IN MILLIMETERS.
C A B
Ø0.260±0.02
16X
0.40
D
C
B
0.40
C. DIMENSIONS AND TOLERANCE
PER ASME Y14.5M, 1994.
D. DATUM C IS DEFINED BY THE SPHERICAL
CROWNS OF THE BALLS.
(Y) ±0.018
A
E. PACKAGE NOMINAL HEIGHT IS 586 MICRONS
±39 MICRONS (547-625 MICRONS).
F
1 2 3 4
(X) ±0.018
F. FOR DIMENSIONS D, E, X, AND Y SEE
PRODUCT DATASHEET.
BOTTOM VIEW
G. DRAWING FILNAME: MKT-UC016AArev2.
Figure 24. WLCSP-16, 0.4mm Pitch, Dimensions
Product-Specific Dimensions
Product
D
E
X
Y
FAN5702UCxx
1.610mm
1.610mm
0.205mm
0.205mm
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
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com
15
0.10 C
3.00
2X
A
B
3.00
1.75
3.00
1.75 3.00
PIN 1 IDENT
0.10 C
2X
TOP VIEW
16X 0.75
0.55 MAX
0.10 C
0.08 C
0.50
(0.15)
16X 0.30
RECOMMENDED LAND PATTERN
0.05
0.00
C
SIDE VIEW
SEATING
PLANE
NOTES:
1.75
1.65
PIN #1 IDENT
A. DESIGN CONFORMS TO JEDEC MO-248.
B. DIMENSIONS ARE IN MILLIMETERS.
4
1
C. DIMENSIONS AND TOLERANCES PER
ASME Y14.5M, 1994.
5
16
D. LAND PATTERN RECOMMENDATION FROM
PCB MATRIX IPC LP CALCULATOR (V2009).
1.75
1.65
0.50
E. DRAWING FILENAME: MKT-UMLP16Brev1.
8
13
12
0.50
9
16X 0.42
0.32
16X 0.30
0.20
0.10
0.05
C A B
C
BOTTOM VIEW
Figure 25. UMLP-16, 3.0 x 3.0 x 0.55mm Pitch, Dimensions, Preliminary
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
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com
16
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
Physical Dimensions (Continued)
FAN5702 — Configurable 180mA 6-LED Driver with I2C Control
© 2010 Fairchild Semiconductor Corporation
FAN5702 • Rev. 1.0.3
www.fairchildsemi.com
17