AN202

AN202
AP3983C (PSR Switcher) + AL1791+AL1793 (1-Channel and 3-Channel Linear CCR
LED Drivers)
4-Channel White+RGB Tunable Color Smart Connected Light Bulb Reference
Design
Jason Lo, Lighting Business Unit, Diodes Inc.
GENERAL DESCRIPTION
The emerging Smart Connected Light (SCL) Bulbs, as Internet of Things (IoT) devices in Smart Home
environment, are characterized by integration of wireless-connectivity microcontroller (MCU) in LED light
bulbs. Users can manage LED light bulbs through smart phone APPs to achieve the following needs:

Energy saving (through dimming of brightness) - 1-channel Dimmable White (1-ch DW)

Light quality management – 2-channel Tunable White (2-ch TW)

Entertainment lighting – 3-channel Tunable Color (3-ch TC) or 4-channel White+RGB (4-ch W+RGB)
Typical functional block diagram of SCL bulbs consists of:

AC-DC Power Conversion

LED Driver

Emitter Module

Wireless MCU Connectivity
This application note describes the complete reference design of an A19 10W ZigBee-Enabled 4-channel
White+RGB SCL (4-ch W+RGB SCL) bulb, capable of generating the more than 16 million colors
application and delivers 800 lumens white lighting requirement. It serves as a good starting point for system
designers to further customize SCL bulb design to their desired performance and cost consideration for
similar products.
KEY SPECIFICATION

Model:
A19-DD-UB-LO-4WRGB

Lamp Shape:
A19

Operating Power:
10W

Operating Voltage: 100V-240V

Frequency:
50/60Hz

Average Lifetime:
25,000Hrs

Bulb Base:
E26/E27

Lumen:
800 lm

CCT Range:
1,800K to 8,000K

Color Range:
More than 16 million colors

CRI:
80Ra

Wireless:
ZigBee Module

Dimension (L*D):
113mm x 62mm
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
1 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
FUNCTIONAL BLOCK DIAGRAM
AC
AC-DC Power
Conversion and
Power Management
Constant
Voltage
LED Driver Circuit
Constant Current and
PWM Controller
< PWM Control
Status >
3.3V DC
Wireless Command
Input
Wireless Connectivity Module
Constant
Current
Emitter Module
1) ACDC ControllerAP3983C
2) LED Driver and PWM
Dimming–
AL1791+AL1793
3) DC Buck Converter–
AP3211
Figure 1 - Functional Block Diagram for W+RGB Smart Connected Light Bulb
A typical SCL bulb (Figure 1) consists of four major functional blocks:
1) AC-DC Power Conversion - It converts AC input to one or multiple desired output DC Constant Voltages (CV).
For a SCL bulb, two or more CVs might be required to better support various DC power requirements from
Emitters and Wireless Connectivity Module.
2) LED Driver - Taking CV inputs to relevant LED driver channels, the LED driver circuitry generates one or more
Constant Current (CC) to drive associated LED emitters.
3) Wireless Connectivity Module - The Wireless Connectivity Module consists of an intelligent MCU and RF
circuitry to connect a SCL bulb either directly with smartphones or indirectly through WiFi/ZigBee hub, based
on a communication protocol (e.g. Bluetooth/BLE, ZigBee, etc.)
4) LED Emitter Module - This is the light source for the SCL bulb. Driven by PWM dimming signal(s) from
Wireless Connectivity Module, emitters on the LED Emitter Module are properly mixed to generate desired light
output - either brightness adjustment, Corellated Color Temperature (CCT) tuning, or color mixing.
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
2 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
COMPLETE DESIGN SCHEMATICS
R3
L
F1
L1
C2
D6
R2
CX1
R5
4
-
+ C4
BD1
1
VDR1
~
C1
1
PT1
D1
C5
D2
+
R9
3
D10
2
R6
~
PT2
D4
R4
D9
2
N
R7
C3
D5
CN1
1
+ C6
D3
PT3
4
D7
2
+ C7
3
5
PT4
4
T1
C9
VLED1
VLED2
VLED3
GND
R11
D11
VCC
3
R8
U1
AP3983C/DIP-7
R13
D
R1
5,6
D8
R10
R16
4
FB
2
C10
CS
CPC
R14
GND
R12
7
CY 1
C11
1
R15
C8
Figure 2.a - AP3983C Power Board Schematics
CN2
LED1_(W+)
VLED1
1
25V
2
12V
LED2_(G/B+)
3
LED3(R+)
C2
R3
8V
U2
1
GND
4
+3.3V
2
R1
CON4_2.0mm
3
4
5
1
2
3
4
5
6
7
1
4
+3.3V
VIN
5
L1
BS
5
C7
6
6
7
U1 AP3211
C5
FB
C8
R12
3
C4
2
PWM2
LEDPG
PWM1
LED4
LED1
LED3
LED2
GND
13
12
11
10
R5
R6
C3
9
8
AL1793
EN
VIN
PWM4
REF
PWM3
FAULTB
PWM2
LEDPG
PWM1
LED4
LED1
LED3
LED2
GND
14
13
12
11
R8
R9
C6
10
9
8
15
GND
EN
FAULTB
U3
2
3
SW
PWM3
14
WHITE-_(W-)
1
CN4
7PIN_2.54mm
4
REF
15
7
EN
PWM_B
PWM_G
PWM_R
PWM_W
GND
3.3V
CN3
7PIN_1.27mm
6
VIN
PWM4
7
6
5
4
3
2
1
3.3V
GND
PWM_W
PWM_R
PWM_G
PWM_B
EN
AL1791
EN
PGND
VLED3
C1
PGND
VLED2
BLUE-_(B-)
D1
R13
GREEN-_(G-)
RED-_(R-)
Figure 2.b - LED Driver - AL1791+AL1793+M56 ZigBee Module Schematics
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
3 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
R+
B/G+
R3 0R
R1
0R
White
D9
White
5
15
14
6
G2+
G1+
B2+
24
G212
11
G1-
White
17
D5
D1
LQ9-07MC00-0659
D12
B2-
White
White
B1-
D8
D11
R1-
White
White
2
D4
D7
B1+
23
White
R1+
D3
R4
0R
White
R2+
White
R2
0R
D10
R2-
White
D6
18
D2
3
W+
D13
A1
ANTENNA
White
WRBGANT
Figure 2.c - LED Emitter Module Schematics
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
4 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
APPLICATION DESCRIPTION

Power Board (PB) Application Description
The PB design (Figure 3) is based on AP3983C PSR AC/DC Switcher IC (integrated MOSFET switch) (refer to the
Key Component Section) to be capable of power rating up to 12W. In the AL179x family, for 350mA channel
current, the maximum LEDs (voltage headroom) is 0.4V. To support four emitter strings with adequate voltage
headroom to Forward Voltage Drop (VF) and attached MCU power, the PB outputs three CVs:

VLED1 - 25V for driving White LED emitter string.

VLED2 - 12V for driving Green & Blue LED emitter strings, and supplying power source to LED driver
regulators (U2_AL1791 and U3_AL1793, Refer to the Key Component Section).

VLED3 - 8V for driving Red LED emitter string, and supplied to the asynchronous DC-DC buck converter
(AP3211) generate a constant voltage (3.3V) to drive wireless connectivity module.
CN1
Figure 3 - AP3983C Power Board (58mmx27mm)
For the design principles and design examples of AP3983C power board (e.g. Swithcing Frequency, Transformer
Design, Feedback Resistors Nework Design), please refer to Diodes' Application Note of AP3983.
Pin#
Pin Name
Functions
1
VLED1
25V output, for driving White emitter string
2
VLED2
12V output, for driving Green and Blue LED Emitter strings and supplying
LED drivers of U2_AL1791 and U3_AL1793
3
VLED3
8V output, for deriving Red LED Emitter string and supplying to Wireless
MCU power source
4
GND
Ground
Note_ Pin#1 is the one close to the edge of the PCB (long side).
CN1 - Pin Functions (Connected to LED Driver Board)
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
5 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202

Emitter Module Board (EMB) Application Description
The 4-ch W+RGB EMB (Figure 4) adopt two types of Emitters. One of RGB silicone emitter at the centers of PCB.
Another type of white emitter is distributed at the circumference of emitter board, as follows:
 2,700K CCT White Emitters (total of 12 Emitters 4S3P), CCTwarm (refer to Appendix II - LITEON OPTO LTW-3030DZL Emitter Series)
 LQ9 – 9-die RGB silicone emitter – Red (3 dies in serial), Green (3 dies in serial) and Blue (3 dies in serial)
in parallel strings. (refer to Appendix II - LED Engin LQ9 Emitter).
The Forward Voltage Drop (VF) per white emitter, with two 0.5W emitter dies in serial, is around 6.0V and the total
VF per emitter sting is 24.0V. The cathodes of emitter strings are attached to LED1 pin of AL1791. The choices of
numbers of emitters, emitter structure arrangement , and driving current are based on meeting the required system
specification (above 800 lumens for the finished light bulb).
In the RGB silcone emitter, the VF of each strings are as follows:

The VF of red emitters is 6.7V for 350mA maximum channel current.
 The VF of green emitters is 10.1V for 350mA maximum channel current.
 The VF of blue emitters is 9.1V for 350mA maximum channel current.
Figure 4 - 4-Ch W+RGB Emitter Module (Diameter - 46mm)
Pin Name
W+
B/G+
Functions
The soldering pad is attached to the anode of White emitter string.
The soldering pad is attached to the common anodes of Green and Blue emitter strings.
R+
The soldering pad is attached to the anode of Red emitter string.
W-
The soldering pad is attached to the cathode of White emitter string.
R-
The soldering pad is attached to the cathode of Red emitter string.
G-
The soldering pad is attached to the cathode of Green emitter string.
B-
The soldering pad is attached to the cathode of Blue emitter string.
A1
The soldering pad is attached to the antenna chip
Output / Input Pin Functions
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
6 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202

LED Driver Board (LDB) Application Description
In this 4-Ch LDB of W+RGB SCL bulb design, have one asynchronous DC-DC buck converter to supplying
wireless connectivity module and two sets device to control White, Red, Green and Blue 4-channels LED current.
 U1_AP3211 is a asynchronous DC-DC buck converter. The required constant voltage to drive wireless
module (3.3V) is generated from this converter with input from VLED3 (8V).
 U2_AL1791 is for white LED driver, the REF (reference current setting resistor) is 16.5KΩ (R5_33KΩ and
R6_33KΩ two resistors parallel, in Figure 2.b) to regulate channel current around 350mA for AL1791 LED1.
 U3_AL1793 is for RGB LED strings driver, the REF is 8.57KΩ (R8_20KΩ and R9_15KΩ two resistors
parallel, in Figure 2.b) to regulate channels current around 350mA for AL1793 LED1_Red, LED2_Green
and LED3_Blue.
The LED input power for each fixed CCT emitter strings is around 8.4W (24V*350mA). By applying suitable PWM
signal patterns to control white and RGB emitter strings, The CCT tuning ranging from 1,800K to 8,000K can be
achieved and support 800lm lighting requirement.
That also capable of generating more than 16 million colors by applying suitable PWM signal patterns to control
RGB emitter strings.
Note that an wireless chip antenna (A1) is placed on the EMB for wireless connectivity.
CN2
CN3
CN4
Figure 5 - LED Driver Module (38mmx24mm)
The LED current is expressed as below:
For AL1791
For AL1793
Where VREF=1.5V nominally for all devices
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
7 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
Pin#
Pin Name
Functions
1
VLED1
25V input, for driving white emitter string
2
VLED2
12V input, for driving Green and Blue emitter strings and supplying to
LED drivers (U2_AL1791 and U3_AL1793)
3
VLED3
8V input, for deriving Red emitter and supplying to converter (AP3211).
The converter output (3.3V) is supplying Wireless MCU
4
GND
Ground
CN2 – Pin Functions (Connected to Power Board)
Pin#
Pin Name
Functions
1
3.3V
This pin is attached to the output 3.3V of converter. For M56 ZigBee
module VDD input
2
GND
Ground
3
PWM1
This pin is attached to the PWM1 of U2_AL1791. Connected to
PWM_01 of M56 ZigBee Module for controlling white emitter
4
PWM2
This pin is attached to the PWM1 of U3_AL1793. Connected to
PWM_02 of M56 ZigBee Module for controlling Red emitter
5
PWM3
This pin is attached to the PWM2 of U3_AL1793. Connected to
PWM_03 of M56 ZigBee Module for controlling Green emitter
6
PWM4
This pin is attached to the PWM3 of U3_AL1793. Connected to
PWM_04 of M56 ZigBee Module for controlling Blue emitter
7
EN
This pin is attached to the EN of U2_AL1791 and U3_AL1793.
Connected to interface pin of M56 ZigBee to control on/off function of
U2 and U3.
Note_
CN3 – Connected to ZigBee Module
CN4 – For Customer Development Kit “CDK”
CN3/CN4- Pin Functions (Connected to ZigBee Module)
Pin Name
Functions
LED1
25V for driving white emitter string
LED2
12V for driving Green and Blue emitter strings
LED3
8V for driving Red emitter string
WHITE-
This soldering pad is attached to LED1 pin of U2_AL1791. Connected to cathode
terminal of white emitter string.
RED-
This soldering pad is attached to LED1 pin of U3_AL1793. Connected to cathode
terminal of Red emitter string.
GREEN-
This soldering pad is attached to LED2 pin of U3_AL1793. Connected to cathode
terminal of Green emitter string.
BLUE-
This soldering pad is attached to LED3 pin of U3_AL1793. Connected to cathode
terminal of Blue emitter string.
Output / Input Pin Functions ( Connected LED Emitter Board)
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
8 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202

M56 Zigbee Module (ZM) Application Description
For the wireless connectivity, it is enabled by embedding M56 ZigBee Module (Appendix III) inside the 4-ch
W+RGB SCL bulb by piggybacking on the other side of the LED driver board. Embedded ZigBee Light Link (ZLL)
in the flash memory, M56 ZigBee module will communicate ZLL commands with a ZLL-capable Gateway Hub.
This ZigBee module board is piggybacking on the LED driver board on the side opposite to the Power Board.
Pin1~7 Connected to CN3 of LDB.
7 6 5 4 3 2 1
Figure 6 - M56 ZigBee Module (15mm x 15mm)
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
9 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
Output Assembly Description

Antenna Cable
ZigBee Module
LED Driver Module
Power Board
Figure 7 - Power Board + LED Driver Board + M56 ZigBee board



Two green wires are connected to AC input
Antenna cable from M56 Zigbee Module connected to A1 ”Antenna Chip” of Emitter board
There are others seven wires connected to emitter board, as following table:
Pin# of LDB
Pin# of EMB
Functions
LED1
W+
LED2
B/G+
LED3
R+
8V drives Red emitter string
WHITE-
W-
Connected to U2_AL1791_LED1 and to control white emitter string
RED-
R-
Connected to U3_AL1793_LED1 and to control red emitter string
GREEN-
G-
Connected to U3_AL1793_LED2 and to control green emitter string
BLUE-
B-
Connected to U3_AL1793_LED3 and to control blue emitter string
25V drives white emitter string
12V drives green and blue emitter strings
Output / Input Pin Functions ( Connected LED Emitter Board)
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
10 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
PERFORMANCE TESTING
The key system performance parameters of 4-ch W+RGB SCL bulb are summarized in Table 1 below.
10W A19 4-Channel W+RGB Reference Light Bulb
Item No
Parameter
Condition
Test Result
1
Input Voltage Range
100-240VAC ~ 50/60Hz
2
Power Factor
> 0.7
(CCT: initial. The bulb is at
maximum brightness)
110VAC: 0.8451 (10.7W_in)
230VAC: 0.7621 (10.38W_in)
3
Efficiency - PB Only
~ 85%
(at VLED1: 360mA, VLED2: 20mA
and VLED3: 20mA)
110 VAC: 82.631%
230 VAC: 85.478%
4
Standby Power
< 0.5Watt,
Bulb is at standby mode
(M56 ZigBee module Operating
Current is about 35mA )
110 VAC /60Hz: 0.283W
230 VAC /50Hz: 0.402W
5
Start-Up Time
from Wall Switch
110 VAC
(1M+1M Startup Resistor)
Tstart-up: 892mS (PB only)
Tstart-up: 1740mS (Bulb turn-ON)
6
Output Ripple Voltage
(Vpeak-to-peak)
Test Condition (at 110VAC)
(at VLED1: 360mA, VLED2: 20mA
and VLED3: 20mA)
VLED1_25V: 496mVp-p
VLED2_12V: 280mVp-p
VLED3_8V: 560mVp-p
7
THD (Total Harmonic
Distortion)
Test Condition
VLED1: 350mA, VLED2: No Load
110 VAC /60Hz: 51.09%
230 VAC /50Hz: 73.28%
8
Temperature of U2_AL1791
and U3_AL1793
< 105°C> Load condition:
AL1791 is at 360mA,
AL1793 is at 250mA+250mA
AL1791: 68°C (Open Cover)
AL1793: 85°C (Open Cover)
Table 1 - System Performance Testing of 4-ch W+RGB SCL Bulb
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
11 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
SYSTEM DESIGN CONSIDERATIONS AND TRADE-OFFS
When design a production worthy SCL bulb, the system designers have many considerations:
1) Input Voltage Range
2) Power Factor (PF)
3) Efficiency
4) Standby Power
5) Start-Up Time
6) Thermal Management
While 4-ch W+RGB SCL bulb is designed for full range voltage input, system designs could optimize components
for single voltage application (e.g. 120V or 230V). For example, more cost-effective components could be used for
120V-only SCL bulb, including:
1) BD1 (DF06S)
2) Passive Valley Fill (PVF) Circuit: C4, C6, D1, D3 and D4 (see figure 8 below).
+
AC
D1
C4
BD1
D4
D3
+
C6
Figure 8 - Bridge and Valley Fill Circuit
AP3983C, with integrated MOSFET switch, has its advantages of supporting a cost-effective power board design.
The relative small ripple of output voltage for CVs of AP3983C (Vpeak-to-peak ripple < 2.9% of the CV of Emitter
Strings) is ideal to support linear Constant Current Regulation (CCR) based LED driver, such as AL1791 and
AL1793, with optimal voltage headroom for attached LED emitter strings.
Per Energy Star Compliance requirement, the Power Factor (PF) for over 5W light bulb need to be over 0.7. As the
AP3983C does not have built-in Active Power Factor circuitry, a PVF Circuit, consists of C4, C6. D1, D3 and D4 is
designed to achieve desired PF over 0.7. A high PF value could be achieved by using larger capacitors (C4 and
C6), however the trade-offs will be a longer start-up time, PCB space and cost. The system designers need to
select the right balance for the PF value and other considerations.
The system efficiency of 10W typical 4-ch W+RGB SCL bulb needs to be above 75% based on the proposed twostage designs. For the Power stage (first stage) efficiency, it is designed to achieve 85%. The factors impacting
power board efficiency include:
1) CV Output Voltage
2) Pre-loading circuit (D9, D10, D11, R4, R9, R11 and R12, see figure 2.a on page 3) to prevent spurious output
voltage at no load situation for one CV output, but sudden current is drawn by the other CV output.
3) Low VF Drop Super Barrier Rectifier (D6, D7 and D8, see figure 2.a on page 3).
While fixed-CCT on-off LED light bulb will have no power consumption when turned off at standby mode, a SCL
bulb consumes non-trivial standby power due to constant-on for wireless module connectivity. To save energy
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
12 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
consumed during the standby mode, it recommded to stay within 0.5W when in the standby mode for the entire
SCL bulb.
In the 4-ch W+RGB SCL bulb
follows:
1) AL1791 and AL1793 IC 2) Dummy Loading 3) Start-up Resistor Circuit 4) ZigBee Module 5) Others Power Loss
design, the standby power consumption is measured with estimated breakdown as
5 mW (EN of AL1791 and AL1793 are disabled).
50 mW (Pre-load circuitry power consumption)
50 mW (R5 and R6 are 1M/1206 resistor)
250 mW (UBEC M56 ZigBee Module standby current is 35mA)
50 mW (AP3983, Snubber and Switching Loss)
Improved Power Consumption Suggestion

Startup Circuit
For low-cost implementation, a simple start-up circuity is adopted (R5 and R6, see figure 2.a on page 3). Tradeoffs involved are start-up time (time when LED light could be turned on upon instruction to actual light output) and
standby power consumption. Increasing the value of resistance of R5 and R6, the standby power will decrease at
the expense of longer start-up time (Table 3).
Values of R5 & R6
startup time at 110 VAC
(after fully whole circuit discharged)
Standby Power at 230 VAC
LED OFF Mode (<0.5W)
two 1M = 2,000KΩ
0.89 Sec
0.395 W
two 510K = 1,020KΩ
0.62 Sec
0.416 W
two 392K = 784KΩ
0.21 Sec
0.455 W
Table 3 - Start-Up Resistor Circuit on Startup Time and Standby Power
An alternative quick dynamic startup circuit can be used to replace the resistor start-up circuit to shorten start-up
time without static standby power consumption (Figure 7). During the AC power initial input, Transistor Q1 is
turned ON to charge VCC input to AP3983C. Q1 will be shut off after initial start-up time until shut off by returning
path from the auxiliary winding when VCC is highter than one threshold voltage below 18V where the Zener diode
is clamped at.
HV
R2
R1
Q1
BSS127
ZD1
DFLZ18
VCC
Figure 9 - Dynamic Fast Start-Up Circuit
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
13 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202

Thermal Management Design Suggestion
Thermal management is a critical design consieration as it impacts safety and reliability of the SCL bulbs. Among
many good practices used in the power board design for managing thermal issues of SCL bulbs, system designers
also need to fine tune the CV output to compensate for VF fluctuation due to temperature effect. Depending on
thermal characteristics of emitters, VF drops around 5% to 10% range when temperature is increased from 25°C to
125°C. The proposed design is based on a low-cost open-loop CV fine tuning approach by adopting a Negative
Temperature Coeffient (NTC) resistor 10K (The Circuit is not shown). The VLED1 output of the 4-ch W+RGB SCL
bulb design is in the range of 25V down to 23.5V (-6%).
Pin4 of T1_Transformer
AP3983C
R1
FB
R16
R8
(NTC)
R10
R15
Figure 10 - Thermal Management Circuit
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
14 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
KEY COMPONENTS

AP3983C - AC/DC Controller
AP3983C IC PIN OUT ASSIGNMENT

Primary Side control for Eliminating Opto-coupler and Secondary CV/CC Control Circuitry

Built-In HV power MOSFET with 650V BVdss

Valley-turn on to reduce switching loss

Up to 80KHz operating frequency at full load for compact size application

Piece-wise frequency reduction to enhance conversion efficiency and suppress audio noise

±5% constant voltage accuracy

±7% constant current accuracy

Open Circuit Protection (OCP), Over Voltage Protection (OVP), Over Temperature Protection (OTP)

Short Circuit Protection (SCP) with hiccup

3-Segment Drive Current for Radiative EMI Suppression

AP3983 Pin Descriptions:
Symbol
Pin Name
Descriptions
SO-7 / PDIP-7
CPC
1
This pin is connected a capacitor to GND to serve as cable compensation function.
Additional resistor in parallel with the capacitor will weaken cable compensation to
meet cable-less applications.
FB
2
The voltage feedback is from auxiliary winding.
VCC
3
This pin receives rectified voltage from the auxiliary winding of the transformer.
CS
4
It is used for current sense from primary side of the transformer.
D
5, 6
GND
7
This pin is connected with an internal power MOSFET's drain.
This pin is the signal reference ground.
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
15 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202

AL1791/2/3/4 - LED Driver Controller
AL1791/2/3/4 IC PIN OUT ASSIGNMENT
EN
1
14
VIN
PWM4/GND
2
13
REF
PWM3/GND
3
12
FAULTB
PWM2/GND
4
11
LEDPG
PWM1
5
10
LED4/GND
LED1
6
9
LED3/GND
LED2/GND
7
8
GND

Input Voltage Range: 6.5V to 30V

1/2/3/4-channel LED drivers: independent Analog or PWM dimming control for each channel

Reference Current: Adjustable by an external reference resistor

Ratio-optimized currents for 4 independent LED channels (AL1794 only): Suitable for Tunable White and
Tunable Color

Low Standby Power: With EN pin

E-flicker free High Frequency PWM dimming with Deep Dimming Capability: Support 10KHz down to 1.0%,
4KHz down to 0.4%, or 1KHz down to 0.1%

Internal Protections: Under Voltage Lockout (UVLO), LED string open/short protection

Over temperature protection (OTP): Thermal shut down and auto thermal recovery

Fault Reporting: UVLO, OTP, Open, and Short

LED Power Good Reporting

Low system BOM cost

Ambient Temperature Range -40°C to +125°C (Automotive Grade)

U-DFN4030-14: Available in “Green” Molding Compound (No Br, Sb)

Totally Lead-Free & Fully RoHS Compliant

Halogen and Antimony Free. “Green” Device
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
16 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202

AL1791/2/3/4 Pin Descriptions
Part Number
Pin Name
Descriptions
U-DFN4030-14
EN
1
Active-high to Enable, Internally Pulled Down
PWM4/GND
2
PWM Signal Input for channel 4, Internally Pulled Down for AL1794. GND for AL1791,
AL1792, and AL1793.
PWM3/GND
3
PWM Signal Input for channel 3, Internally Pulled Down for AL1793 and AL1794. GND for
AL1791 and AL1792.
PWM2/GND
4
PWM Signal Input for channel 2, Internally Pulled Down for AL1792, AL1793, and
AL1794. GND for AL1791.
PWM1
5
PWM Signal Input for channel 1, Internally Pulled Down (Tied to GND when this channel
is NOT used).
LED1
6
Channel 1 LED Cathode
LED2/GND
7
Channel 2 LED Cathode for AL1792, AL1793, and AL1794. GND for AL1791.
GND
8
Ground
LED3/GND
9
Channel 3 LED Cathode for AL1793 and AL1794. GND for AL1791 and AL1792.
LED4/GND
10
Channel 4 LED Cathode for AL1794. GND for AL1791, AL1792, and AL1793.
LEDPG
11
LED Power Good Indication. Asserted Low to report insufficient headroom. Needs an
external pull-up resistor.
FAULTB
12
Fault Report. Asserted Low to report faulty conditions. Needs an external pull-up resistor.
REF
13
Reference Current Setting through External Resistor (RSET)
VIN
14
Voltage Input
Exposed pad. Internally connected to GND.
Exposed PAD
Exposed PAD
It should be externally connected to GND and thermal mass for enhanced thermal
impedance.
It should not be used as electrical conduction path.
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
17 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
Bill of Material - ACDC Board
#
Name
QTY
Part Number
Manufacturer
Description
1
U1
1
AP3983C/DIP-7
Diodes, Inc.
ACDC PSR converter (build in 650V MosFET)
2
BD1
1
DF06S
Diodes, Inc.
600V/1A bridge diode
3
D1, D2, D3,
D4, D5
5
DFLR1600-7
Diodes, Inc.
4
D6
1
SBR1U200P1-7
Diodes, Inc.
1A200V surface mount super barrier rectifier
POWERDI® 123
5
D7,D8
2
DFLS160-7
Diodes, Inc.
1.0A/60V surface mount schottky barrier rectifier
POWERDI® 123
6
CX1
1
0.047uF/275Vac
EMI filter
7
CY1
1
1000PF/Y1
EMI capacitor
8
C1,C2
2
1nF/1KV/1206
Snubber capacitor
9
C3
1
0.22uF/450V
EMI filter
10
C4,C6
2
10uF/200V/8*14
Without Valley Fill. C4 and C6 need to be changed
to 4.7uF/400V
11
C5
1
270uF/35V/8*16
VLED1 output filter capacitor
12
C7
1
4.7uF/50V/5*11
AP3983C startup and VCC hold-up capacitor
13
C8
1
0.1uF/50V/0603
AP3983C output cable compensation
14
C9,C10
2
330uF/16V/8*12
VLED2,VLED3 output filter capacitors
15
C11
0
-
Not fitted (Feedback compensation)
16
R1
1
39K/0603
AP3983C voltage feedback resistor
17
R2
1
100K/1206
Snubber resistor
18
R3
1
10R/1206
Snubber resistor
19
R5,R6
2
1M/1206
Startup resister (must for high voltage
stress >200V)
20
R7
1
10R/0805
Snubber resistor
21
R8
1
10K/0603/NTC
AP3983C voltage feedback resistor
22
R10
1
6.8K/0603
AP3983C voltage feedback resistor
23
R12
1
4.7K/1206
Pre-load
24
R13, R14
2
2R/1206
AP3983C current sense resistor
25
R16
1
43K/0603
AP3983C voltage feedback resistor
26
R15
1
15K/0603
AP3983C voltage feedback resistor
27
D9
1
DFLZ22-7
Diodes, Inc.
Improved load regulation
28
D10
1
DFLZ15-7
Diodes, Inc.
Improved load regulation
29
D11
1
DFLZ6V2-7
Diodes, Inc.
Improved load regulation
30
R4,R9,R11
0
-
31
T1
1
EE16
32
F1
1
T1A-T250V
33
CON1
1
1.0A surface mount glass passivated rectifier
NO need for D1, D3, D4 for low PF (< 0.7) design
Valley Fill Input Bulk Capacitor
CON4*1_2mm
(CH1101S)
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
Not fitted (Pre-load)
Emax, Inc
EE16 Transformer
(Np:Na:Ns25V:Ns12V:Ns8V=110:13:4:8; 0.9mH)
Fuse
CviLux, Inc
Output connector
18 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
34
L1
1
1.0mH/6Φ I core
EMI filter inductance
35
VDR1
1
471K
Reserved for Future Use EMC Part.
TOTAL
43
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
Power Board Electronic Parts
19 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
Bill of Material – LED Drive Board
#
Name
QTY
Part Number
Manufacturer
Description
WIDE INPUT VOLTAGE RANGE, 150mA ULDO
REGULATOR, SOT-23-5
1
U1
1
AP3211KTRG1
Diodes, Inc.
2
U2
1
AL1791AFE-13
Diodes, Inc.
3
U3
1
AL1793AFE-13
Diodes, Inc.
4
D1
1
APD204
Diodes, Inc.
5
R1
0
-
Not fitted. (AL1791/3 EN pull high resistor)
6
R3
1
0R/1206
Jumper
7
R8
1
20K/1206
U3_AL1793 LED current setup resistor.
8
R9
1
15K/1206
U3_AL1793 LED current setup resistor.
9
R5,R6
2
33K/1206
U2_AL1791 LED current setup resistor.
10
R12
1
49.9K/0603
AP3211 Feedback resistor
11
R13
1
16.3K/0603
AP3211 Feedback resistor
12
C1,C2
2
1.0uF/50V/1206
VLED1, VLED2, input filter capacitors
13
C5
1
4.7uF/6.3V/0805
3.3V output filter capacitor
14
C3,C6
1
0.1uF/50V/0805
AL1791/3 Vin filter capacitor
15
C4
1
2.2uF/50V/1206
VLED3, input filter capacitor
16
C8
0
-
Not fitted. (3.3V output filter capacitor)
17
C7
1
0.01uF/0805
Boost capacitor
18
CN2
1
Pitch 1.27mm 6Pin
(CH0101S)
19
L1
1
4.7uH/SMA
TOTAL
CviLux, Inc.
Single Channel Current-Ratio-Optimized LED
Driver with Analog and PWM Dimming U-DFN4030-14
Triple Channels Current-Ratio-Optimized LED
Driver with Analog and PWM Dimming U-DFN4030-14
Buck converter flywheel diodes
For M56 ZigBee Module
Buck converter power inductor
19
LD Board Electronic Parts
Bill of Material – Emitter Board
#
Name
QTY
Part Number
Manufacturer
Description
D1, D2, D3, D4, D5,
1
D6, D7, D8, D9, D10,
12
LTW3030AZD27
LITEON, Inc.
LTW-3030AZD Emitter Series
LED Engin, Inc.
9-die RGB silicone dome emitter
D11, D12
2
LQ9
1
LQ9-07MC000659
3
R1,R2, R3,R4
4
0ohm/1206
1
ANT3216LL11R
2400A
4
TOTAL
A1
VF (Forward Voltage) matching resistor
18
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
LD Board Electronic Parts
20 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
APPENDIX I - EE16 TRANSFORMER SPEC
EE16 transformer with (Appendix X).
A.
Transformer Pin & Wire Description:
Circuit:
Primary
Cross sectional view:
Secondary
1
2Ts
PT1
L6
L6
2Ts
L2
3
L5
PT2
2Ts
L1
L3+L4
L3
2
L2
PT3
4
2Ts
L4
F1 Wire Shilding
L5
1T
PT4
5
L1
Start
Teflon Tube
F1
5
Pin definition
(StartEnd)
Wire (φ)
Turn (Ts)
Layers
Layers of Tape
L1
2 3
2UEW-B 0.19mm x 1P
76
2
1T
F1
5
2UEW-B 0.13mm x 1P
52
1
1T
L2
PT1 PT2
Triple wire-B 0.35mm x 1P
13
1
L3
PT2 PT3
Triple wire-B 0.35mm x 1P
4
0.3
L4
PT3 PT4
Triple wire-B 0.35mm x 1P
8
0.7
1T
L5
4 5
2UEW-B 0.13mm x 1P
18
1
1T
L6
3 1
2UEW-B 0.19mm x 1P
34
1
2T
OVER CORE
B.
#
2.1
3Ts
Electrical Characteristic :
Test Item
Winding
Pin
Rating
Unit
Tolerance
Remark
Inductance
L1+L6
1→2
0.9
mH
+/-5%
@ 100KHz / 1V
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
21 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
APPENDIX II - LED ENGIN LQ9 AND LITEON OPTO EMITTER

LQ9-07MC00-0659 9-die RGB Silicone Dome emitter
Key Features

9-die RGB silicone dome emitter

Can dissipate up to 20W

Ultra-small foot print – 7.0mm x 7.0mm

Surface mount ceramic package

Low Thermal Resistance (1.3°C/W)

Lead (Pb) free and RoHS compliant
Mechanical Dimensions (mm)
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
22 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
Contact LED Engin
Web Site:
www.ledengin.com
Contact:
Cindy Xu ([email protected])
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
23 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202

LITEON OPTO - LTW-3030DZL Emitter Series (LTW-3030DZL27) -

Typical Performance
Contact LiteON Opto (光寶科技)
Web Site:
Contact:
E-mail:
www.liteon.com/opto
Eddie Su
([email protected])
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
24 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
APPENDIX III - ZIGBEE MODULE M56 (UBEC)

Introduction and Specification
 M56 Module:
2.4GHz RF module which integrates UBEC’s low power 2.4GHz
IEEE802.15. 4 RFIC UZ2400D
 MCU:
ARM M0-Cotex Low Power Design
 Voltage Input:
2.7V ~ 3.6V
 TX Current (@3.3V, 32MHz):
37.09mA
 RX Current (@3.3V, 32MHz):
33.76mA
 Temperature Range:
-20°C ~ 105°C
 Dimension:
15mm x 15mm
Functions
Pin#
Pin Name
1
VDD
Connected to LED driver board - 3.3V
2
GND
Connected to LED driver board Ground
3
PWM_01
Connected to LED driver board – PWM1 of U2_AL1791
To control white emitter string
4
PWM_02
Connected to LED driver board – PWM1 of U3_AL1793
To control red emitter string
5
PWM_03
Connected to LED driver board – PWM2 of U3_AL1793
To control green emitter string
6
PWM_04
Connected to LED driver board – PWM3 of U3_AL1793
To control blue emitter string
7
EN
Connected to AL1791 and AL1793 Pin#1-EN, enable/disable
LED driver
Output Pin Define (Assembled to the LED Driver Board)
M56 ZigBee Module Outline Drawing
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
25 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202

Schematic and Connection Define
Pin#
Pin Name
Functions
Remark
1
TX
UART1 data transmitter output pin
Connected to GPB5
2
RX
UART1 data receiver input pin
Connected to GPB4
3
NRST
RST
4
SWDAT
ICE_SWDAT
5
SWCLK
ICE_SWCLK
J1 - Serial wire Debug Port
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
26 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
Pin#
Pin Name
Functions
1
VDD
+3.3V
2
GND
GND
3
PWM_01
PWM 0 channel 0 output, GPIO, (PA. 12)
WHITE
4
PWM_02
PWM 0 channel 1 output, GPIO, (PA. 13)
RED
5
PWM_03
PWM 0 channel 2 output, GPIO, (PA. 14)
GREEN
6
PWM_04
PWM 0 channel 3 output, GPIO, (PA. 15)
BLUE
2
7
EN
GPIO, I C 1 SDA, (PA. 10)
8
FAULTB
GPIO, I C 1 SCL, (PA. 11)
9
LEDPG
GPIO, ADC, (PA 0)
10
TEM-D
No Available
11
VADJI I/D
Remarks
EN
2
GPIO, DAC (PC. 7)
J2 - Application Usage
Contact UBEC:
Headquarters
Address: 6F-1, No. 192, Dongguang Rd., Hsinchu, 300 Taiwan
Tel: +886-3-5729898
Fax:+886-3-5718599
Website: http://www.ubec.com.tw
Sales Services
E-mail: [email protected]
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
27 of 28
www.diodes.com
November 2015
© Diodes Incorporated
AN202
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS
TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE
LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall
assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes
Incorporated website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales
channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify
and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly
or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and
markings noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the
express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems,
and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systemsrelated information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and
its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or
systems.
Copyright © 2015, Diodes Incorporated
www.diodes.com
AN202 4-ch W+RGB Bulb Reference Design
Document number: Rev 1.0
28 of 28
www.diodes.com
November 2015
© Diodes Incorporated
Similar pages