DS_ACT811 811B_Rev0_23OCT13_W.pub - Active-Semi

ACT811/B
Rev 0, 23-Oct-13
Active Direct Drive™ LED Driver
FEATURES
GENERAL DESCRIPTION
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The ACT811/B is LED driver IC based on ActiveSemi's Patented Active Direct DriveTM Technology
and Patent-Pending Active Valley FillTM that
adaptively drives a string of variable-weighted LED
segments up to 12W directly from an AC line
voltage with very few total components. By
adaptively modulating the variable-segmentweighted LED string voltage to match the varying
AC line voltage, the Active Direct DriveTM
Technology results in the ACT811/B having highest
efficiency, high power factor, and low total harmonic
distortion. The high efficiency and high performance
make the ACT811/B ideal for advanced energy
saving solid state lighting applications and eases
thermal design.
Highest Efficiency Solution Up to 12W
High Power Factor
Low Total Harmonic Distortion
Low Component Count
Low EMI
Low Crest Factor
Low Flicker Index
Low Strobe Light Motion Effect
Electrolytic Capacitor is not necessary
No Magnetic Component
Over Temperature Protection
With very few external components, the ACT811/B
ensures high reliability and long life time for LEDbased luminaire designs. In addition, the IC protects
the LEDs from over current, and over temperature
conditions. The ACT811/B are optimized to operate
at 100-120VAC and non-dimmable application up to
12W.
Over Current Protection
Brightness Stability over AC Line Voltage
Variation
• Space-Saving, Thermally-Enhanced SOP-16
EP (Exposed Pad) Package
• ACT811/B for 100-120VAC Application
The ACT811/B also incorporate Active-Semi's
Patent-Pending Active Valley FillTM Technology for
maintaining smooth light output for the full AC cycle,
enabling the LEDs to operate without noticeable
flicker or strobe light motion effects. These devices
drive the LED string without high frequency
switching.
APPLICATIONS
• Solid State Lighting (SSL)
• LED Tubes, Downlights and Bulbs
• Replacement of Lamps for 100-120VAC
The ACT811/B are available in the SOP-16EP
package.
TYPICAL APPLICATION DIAGRAM
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Copyright © 2013 Active-Semi, Inc.
ACT811/B
Rev 0, 23-Oct-13
TABLE OF CONTENTS
General Information ..................................................................................................................................... p. 01
Functional Block Diagram ............................................................................................................................ p. 03
Ordering Information .................................................................................................................................... p. 04
Pin Configuration ......................................................................................................................................... p. 04
Pin Descriptions ........................................................................................................................................... p. 05
Absolute Maximum Ratings ......................................................................................................................... p. 06
Electrical Characteristics ............................................................................................................................. p. 07
Typical Performance Characteristics……………………………………………………………………………..p. 09
Functional Description ................................................................................................................................. p. 13
Active Direct DriveTM Controller........................................................................................................ p. 13
Start-Up ............................................................................................................................................ p. 13
Normal Operation ............................................................................................................................. p. 13
Active Valley FillTM ............................................................................................................................ p. 13
LED Arrangement............................................................................................................................. p. 14
PWM and 0-10V Dimming…………………………………………………………………………………p. 14
Protection ......................................................................................................................................... p. 14
SOP-16 EP (EXPOSED PADDLE) Package Outline and Dimensions ....................................................... p. 15
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ACT811/B
Rev 0, 23-Oct-13
FUNCTIONAL BLOCK DIAGRAM
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Copyright © 2013 Active-Semi, Inc.
ACT811/B
Rev 0, 23-Oct-13
ORDERING INFORMATIONcd
PART NUMBER
TEMPERATURE RANGE
PACKAGE
PINS
PACKING
METHOD
ACT811YK-T
-40°C to 125°C
SOP-16EP
16
TAPE & REEL
ACT811BYK-T
-40°C to 125°C
SOP-16EP
16
TAPE & REEL
c: All Active-Semi components are RoHS Compliant and with Pb-free plating unless specified differently. The term Pb-free means
semiconductor products that are in compliance with current RoHS (Restriction of Hazardous Substances) standards.
d: Standard product options are identified in this table. Contact factory for custom options.
PIN CONFIGURATION
VIN
1
16
VP
N/C
2
15
N/C
N/C
3
14
TOP
VN
4
13
SWD
12
SWC
EP
(VSS)
N/C
5
DIM
6
11
SWB
ISET
7
10
SWA
MODE
8
9
IREG
ACT811/B
TOP VIEW
SOP-16EP
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Copyright © 2013 Active-Semi, Inc.
ACT811/B
Rev 0, 23-Oct-13
PIN DESCRIPTIONS
PIN
NAME
1
VIN
Positive rectified AC Voltage. Connect to the positive output of the full bridge rectifier.
2
N/C
Not Connected.
3
N/C
Not Connected.
4
VN
Negative rectified AC Voltage. Connect to the negative output of the full bridge rectifier.
5
N/C
Not Connected.
6
DIM
Dimming Control Pin. To dim the LED power, drive the DIM voltage from 0 to 2.35V. Without
dimming control, connect a bypass capacitor 1uF to VSS. See more information in Dimming
Section.
7
ISET
Current Setting. Connect a resistor RISET between ISET and VSS to determine the LED current.
8
MODE
Mode selection of LED arrangement. As for LED string A-B-C-D-TOP(M), MODE = VSS to select
3-6-6-18-TOP(M), or MODE = Floating for 2-4-8-16-TOP(M). See more information in LED
Arrangement Section.
9
IREG
Current Regulation Output. Connect to the bottom of LED string.
10
SWA
LED Switch A.
11
SWB
LED Switch B.
12
SWC
LED Switch C.
13
SWD
LED Switch D.
14
TOP
LED String Top. Connect to the top of LED string.
15
N/C
Not Connected.
16
VP
Positive Supply Voltage. Connect a capacitor CFILL with appropriate voltage rating between VP
pin and VSS pin.
EP
VSS
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DESCRIPTION
Ground. Exposed Pad shown as dashed block. The exposed ground pad must be electrically
connected to Ground.
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ACT811/B
Rev 0, 23-Oct-13
ABSOLUTE MAXIMUM RATINGSc
PARAMETER
VALUE
UNIT
VIN, VP, TOP to VSS
-0.3 to 200
V
TOP to SWD
-0.3 to 70
V
SWD to SWC
-0.3 to 70
V
SWC to SWB
-0.3 to 32
V
SWB to SWA
-0.3 to 25
V
SWA to IREG
-0.3 to 15
V
IREG to VSS
-0.3 to 25
V
ISET, MODE, DIM to VSS
-0.3 to 5
V
-200 to 0.3
V
Maximum Power Dissipation (TA = 85°C)
1.5
W
Thermal Resistance (θJC)
40
°C/W
Storage temperature range
–65 to 150
°C
Junction temperature range
–40 to 150
°C
300
°C
ESD, Human Body Model, ESDA/JEDEC JDS-001-2012
2
1.6 (pin 6)
KV
ESD, Machine Model, JEDEC EIA/JESD22-A115
250
100 (pin 6)
V
VN to VSS
Lead temperature (soldering, 10 seconds)
c: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may
affect device reliability.
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ACT811/B
Rev 0, 23-Oct-13
ELECTRICAL CHARACTERISTICS
(TA = 25°C unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
135
VAC
Input Supply
Operating Voltage Range
Under Voltage Lockout (UVLO)
Threshold
Supply Current
Vop
VUVLO
IVP
90
VP Rising, Hysteresis = 2.0V
22
VVP = 100V
400
V
1700
µA
Controller
Lamp Power
PLAMP
ISET Voltage
VISET
ISET Current
IISET
Current Setting Ratio
KISET
IREG Current
12
W
RISET=91KΩ
2.35
V
RISET=91KΩ
26
µA
ACT811, CNT=0000
5550
A/A
ACT811B, CNT=0000
2900
A/A
RISET=91KΩ,
CNT=0000
ACT811
130
140
150
mA
ACT811B
69
75
81
mA
RISET=91KΩ,
CNT=1111
ACT811
75
mA
ACT811B
140
mA
IIREG
IREG Discharge Current Ratio
KDCHG
RISET=91KΩ
0.8
A/A
IREG Clamp Threshold
VCLIREG
CNT=1111
15
V
LED Tracking Rising Threshold
LED Tracking Falling Threshold
LED Switch Tracking Delay
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ACT811,
CNT=0000,
RISET=91KΩ
MODE=VSS
10.8
V
MODE=N/C
7.5
V
ACT811B,
CNT=0000,
RISET=91KΩ
MODE=VSS
10.6
V
MODE=N/C
7.1
V
VTRACKF
1
V
TTRK
80
µs
VTRACKR
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Copyright © 2013 Active-Semi, Inc.
ACT811/B
Rev 0, 23-Oct-13
ELECTRICAL CHARACTERISTICS CONT’D
(TA = 25°C unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
LED Switches
LED Switch On Resistance
LED Switch Leakage Current
RQSWA
QSWA, ISWA = 30mA
3
5
RQSWB
QSWB, ISWB = 30mA
5
10
RQSWC
QSWC, ISWC = 30mA
10
20
RQSWD
QSWD, ISWD = 30mA
10
20
ILKG
QSWA, QSWB, QSWC,
QSWD, VDS = Abs Max
10
Ω
µA
Protections
Thermal Regulation Threshold
135
TFB
155
°C
RQVN
IVN = 10mA
25
VN Current Limit
IVNMAX
ACT811, CNT=0000
ACT811B, CNT=0000
280
170
mA
IREG High Detection Voltage
VIREGHI
23
V
VVN = -150V
2
mA
Vin Rising
80
V
VN Start-Up Current
IVNSU
50
Ω
VN Switch On Resistance
Valley Fill
Stop-Discharge Threshold
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VSTDCHG
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ACT811/B
Rev 0, 23-Oct-13
TYPICAL PERFORMANCE CHARACTERISTICS
(TA = 25°C, VIN = 120VAC, unless otherwise specified.)
ISET Pin Voltage vs. ISET Resistor
ISET Pin Voltage vs. VP Pin Voltage
2.300
2.400
ISET Pin Voltage (V)
ISET Pin Voltage (V)
2.350
ACT811/B-002
2.420
ACT811/B-001
2.400
2.250
2.200
2.150
2.100
2.380
2.360
2.340
2.320
2.300
2.000
45
25
65
85
105
125
145
90
165
110
Lamp Power vs. ISET Resistor
Maximum Lamp Power (W)
8.0
MODE = VSS
MODE = Floating
3.5
2
ACT811/B-004
Lamp Power (W)
190
17.5
ACT811/B-003
9.5
16
14.5
13
11.5
Stable Lighting
10
8.5
90
110
130
150
170
190
50
60
70
80
90
100
o
ISET Resistor (kΩ)
Case Temperature ( C)
ISET Pin Voltage Over Temperature
LED Current Over Temperature
2.000
140
LED Current (mA)
2.350
ACT811/B-006
ACT811/B-005
2.700
ISET Pin Voltage (V)
170
Maximum Power vs. Case Temperature
11
5.0
150
ISET Resistor (kΩ)
VP Pin Voltage (V)
6.5
130
1.650
1.300
0.950
ACT811, CNT=0000
70
ACT811B, CNT=0000
0.600
0.250
-20
0
20
40
60
80
100
120
140
0
-20
160
Temperature ( oC)
Innovative PowerTM
0
20
40
60
80
100
120
140
160
o
Temperature ( C)
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ACT811/B
Rev 0, 23-Oct-13
TYPICAL PERFORMANCE CHARACTERISTICS CONT’D
(TA = 25°C, VIN = 120VAC, unless otherwise specified.)
SWA On Resistance Over Temperature
SWB On Resistance Over Temperature
SWB On Resistance (Ω)
SWA On Resistance (Ω)
3.5
3
2.5
2
ACT811/B-008
9
ACT811/B-007
4
8
7
6
5
4
3
1.5
-30
-10
10
30
50
70
90
110
130
150
-30
-10
10
o
SWC On Resistance Over Temperature
90
110
130
150
SWD On Resistance Over Temperature
SWD On Resistance (Ω)
16
14
12
10
ACT811/B-0010
18
ACT811/B-009
SWC On Resistance (Ω)
70
Temperature ( C)
18
16
14
12
10
8
8
6
-30
-10
10
30
50
70
90
110
130
6
-30
150
-10
10
30
50
70
90
110
130
150
o
o
Temperature ( C)
Temperature ( C)
QVN On Resistance Over Temperature
ACT811/B-011
55
QNV On Resistance (Ω)
50
o
Temperature ( C)
60
30
50
45
40
35
30
25
20
-30
-10
10
30
50
70
90
110
130
150
o
Temperature ( C)
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ACT811/B
Rev 0, 23-Oct-13
TYPICAL PERFORMANCE CHARACTERISTICS CONT’D
(TA = 25°C, VIN = 120VAC, unless otherwise specified.)
TOP and VP Waveforms, ACT811B
TOP and VP Waveforms, ACT811
ACT811/B-013
ACT811/B-012
CH1
CH1
CH2
CH2
CH1: VTOP, 50V/div
CH2: VVP, 50V/div
TIME: 2.50ms/div
CH1: VTOP, 50V/div
CH2: VVP, 50V/div
TIME: 2.50ms/div
TOP and IREG Waveforms, ACT811B
TOP and IREG Waveforms, ACT811
ACT811/B-015
ACT811/B-014
CH1
CH1
CH2
CH2
CH1: VTOP, 50V/div
CH2: VIREG, 5V/div
TIME: 2.50ms/div
CH1: VTOP, 50V/div
CH2: VIREG, 5V/div
TIME: 2.50ms/div
VIN V and TOP I Waveforms, ACT811B
VIN V and TOP I Waveforms, ACT811
ACT811/B-017
ACT811/B-016
CH1
CH1
CH2
CH2
CH1: VVIN, 50V/div
CH2: ITOP, 50mA/div
TIME: 4ms/div
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CH1: VVIN, 50V/div
CH2: ITOP, 50mA/div
TIME: 4ms/div
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Copyright © 2013 Active-Semi, Inc.
ACT811/B
Rev 0, 23-Oct-13
TYPICAL PERFORMANCE CHARACTERISTICS CONT’D
(TA = 25°C, VIN = 120VAC, unless otherwise specified.)
VIN V and I Waveforms, ACT811B
VIN V and I Waveforms, ACT811
ACT811/B-019
ACT811/B-018
CH1
CH1
CH2
CH2
CH1: VVIN, 50V/div
CH2: IVIN, 100mA/div
TIME: 4ms/div
CH1: VVIN, 50V/div
CH2: IVIN, 100mA/div
TIME: 4ms/div
TOP V and I Waveforms, ACT811B
TOP V and I Waveforms, ACT811
ACT811/B-021
ACT811/B-020
CH1
CH1
CH2
CH2
CH1: VTOP, 50V/div
CH2: ITOP, 50mA/div
TIME: 2ms/div
CH1: VTOP, 50V/div
CH2: ITOP, 100mA/div
TIME: 2ms/div
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ACT811/B
Rev 0, 23-Oct-13
FUNCTIONAL DESCRIPTION
Active Direct DriveTM Controller
The ACT811/B utilizes Active-Semi's Patented
Active Direct DriveTM and Active Valley FillTM
Technologies that adaptively drives a string of LEDs
up to 12W directly from an AC line voltage. As the
instantaneous AC line voltage varies, the ACT811/B
adaptively adjusts the number of active LEDs in a
variable-weighted LED string to track the
instantaneous rectified line voltage. The result is a
very simple driver circuit with high power transfer
and minimal power loss.
As shown in the Typical Application Circuit, the
ACT811/B application circuit comprises a full-wave
bridge diode, with the positive output of the rectified
line voltage going to the VIN pin of the ACT811/B,
while the negative output of the rectified line voltage
going to the VN pin. The string of LEDs is divided
into 5 groups, named LED groups A, B, C, D, and
M. The top of LED groups A, B, C, and D are each
connected to the SWA, SWB, SWC, and SWD pins,
respectively. The top of LED group M is connected
to the positive output of rectified line voltage via a
anti-reverse protection diode. In addition, a valley fill
capacitor CFILL is connected between the VP pin
and VSS pin, while the current setting resistor
RISET is connected between ISET and VSS.
Within the IC, an Active-Semi's Patented Active
Direct DriveTM Controller generates a signal to
control a sequential string of LED switches QSWA,
QSWB, QSWC, and QSWD for driving SWA, SWB,
SWC, and SWD pins, respectively. Each of these
LED switches is either On or Off, thereby shorting
out or leaving the corresponding LED group active
in the current path. By appropriately determining
which LED groups to be active and which LED
groups to be shorted out, the Controller ensures
that the total number of active LEDs track the
instantaneous rectified line voltage. The LED
current is regulated and set by the external RISET
resistor. In addition, a QVF switch connects the
TOP terminal to VP terminal when discharging the
valley fill capacitor.
The Current Regulator controls the gate of the
QREG switch so that the current through QREG is
inversely proportional at ACT811 or proportional at
ACT811B to the number of active LEDs in the
string. The number of active LEDs track optimally to
the rectified line voltage. Furthermore, since the
LED current is inversely proportional to the number
of active LEDs, the instantaneous LED power is
approximately constant for most of the Normal
region operation at ACT811; Regarding ACT811B,
since the current is proportional, it gains PF >0.95
Innovative PowerTM
and THD <30%. In the event that the LED tracking
algorithm fails, the IC goes into the Protection
Mode.
Start-Up
When power is first applied, the IC is in the
Disabled state. The Internal Supply block starts to
charge the CFILL. When the VP voltage is higher
than the Under Voltage Lockout Threshold, the IC
enters the Normal state.
Normal Operation
Average IREG current (LED current) is set by ISET
resistor by following equations:
ISET = VISET / RISET
IREG Current = KISET • ISET
The Controller detects the gap between the voltage
of IREG and ground, and compares against the
LED Tracking Rising / Falling Threshold. If the gap
voltage is higher than LED Tracking Rising
Threshold and the line voltage is rising, the
controller increases the number of active LEDs. If
gap voltage is less than LED Tracking Falling
Threshold and the line voltage is decreasing, the
controller decreases the number of active LEDs. By
following this proprietary algorithm, the number of
active LEDs optimally track the rectified line voltage
while ensuring that the gap voltage is between
Tracking Rising Threshold and Tracking Falling
Threshold. In the event that LED tracking algorithm
fails to maintain the IREG lower than LED Fault
Detection Threshold, the IC goes into the Protection
state.
Active Valley Fill™
The Patent-Pending Valley Fill operations works as
follows. The Valley Fill Block controls 2 states in a
line cycle, Normal and Discharge states. When VIN
is increasing in Normal states, the CFILL capacitor
is charged through the forward-biased QVF body
diode junction. The charging continues until VP
reaches its peak value.
As VIN decreases, the Valley Fill Block remains in
Normal states until the number active LEDs is
minimum, upon which the Valley Fill block enters
the Discharge state. In the Discharge state, CFILL
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ACT811/B
Rev 0, 23-Oct-13
FUNCTIONAL DESCRIPTION
reduced linearly according to the temperature
increment, and the luminous output is regulated
stably without blinking.
discharges to supply power to all LED groups A, B,
C, D and M. LED current is reduced to 80% in
discharge state.
LED Arrangement
For optimal efficiency with simple driving
mechanism, the ACT811/B follows Active-Semi’s
Patented Direct Drive variable segmentation of the
LED string. The total number of LEDs in the string
is set to track the peak of the rectified line voltage,
while the IC switches control the LEDs in a variableweighted manner, with LED group A being the
lowest weight and LED group D being the largest
weight.
3. Input Current Limit: The maximum current is
limited under the VN Current Limit (IVNMAX) to
protect the IC and system.
LED Arrangement is programmed by using MODE
pin. Respectively, A, B, C and D groups have 2, 4,
8 and 16 LEDs when MODE is floating, and 3, 6, 6,
18 LED when MODE is tied to VSS.
The group M number of LEDs is chosen to
complement to the peak of the rectified line voltage
in addition to group A, B, C and D for 100-120VAC.
PWM and 0-10V Dimming
The PWM or 0-10V dimming signal goes through a
filter to control the DIM at range of 0V - 2.35V to
adjust the LED current. The DIM pin is required to
connect a bypass capacitor 1uF to VSS.
For PWM signal dimming, a resistor is connected to
the DIM coupling with the bypass capacitor as a
lowpass filter. When the PWM control signal inputs,
it’s filtered to the range of 0V - 2.35V.
For 0-10V analog dimming, a voltage divider
network is applied to turn into 0V - 2.35V range to
control the LED current.
Protection
The ACT811/B incorporates multiple levels of
protection to ensure ruggedness in operation.
These include:
1. Hot Plug Protection: When hot plugging, there
is spike voltage at VIN to VN much higher than
normal operation. If the voltage at IREG is
higher than IREG High Detection Voltage
(VIREGHI), the circuit is protected in this short
period until entering normal operation.
2. Over Temperature Protection: When IC junction
temperature is higher than the Thermal
Regulation Threshold (TFB), the current is
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ACT811/B
Rev 0, 23-Oct-13
SOP-16 EP (EXPOSED PADDLE) PACKAGE OUTLINE AND DIMENSIONS
E
DIMENSION IN
MILLIMETERS
DIMENSION IN
INCHES
MIN
MAX
MIN
MAX
A
1.350
1.700
0.053
0.067
A1
0.020
0.120
0.001
0.005
A2
1.350
1.550
0.053
0.061
b
0.380
0.470
0.015
0.019
c
0.200
0.250
0.008
0.010
D
9.860
10.06
0.388
0.396
D1
3.300
4.000
0.130
0.157
E
3.800
4.000
0.150
0.157
E1
5.800
6.200
0.228
0.244
E2
1.780
2.500
0.070
0.098
D
D1
SYMBOL
b
e
E2
A1
E1
A2
A
e
L
θ
c
1.270 TYP
0.050 TYP
L
0.450
0.800
0.018
0.031
θ
0°
8°
0°
8°
Active-Semi, Inc. reserves the right to modify the circuitry or specifications without notice. Users should evaluate each
product to make sure that it is suitable for their applications. Active-Semi products are not intended or authorized for use
as critical components in life-support devices or systems. Active-Semi, Inc. does not assume any liability arising out of
the use of any product or circuit described in this datasheet, nor does it convey any patent license.
Active-Semi and its logo are trademarks of Active-Semi, Inc. For more information on this and other products, contact
sales@active-semi.com or visit http://www.active-semi.com.
is a registered trademark of Active-Semi.
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