Data Sheet

Data Sheet
Rev. 1.00 / April 2013
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
LED Lighting ICs
Wise and
Efficient
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
Brief Description
Features
The ZSLS7031 is a primary-side controlled, peakcurrent-mode high-brightness LED flyback driver
that supports both isolated and non-isolated
designs with active power factor correction (PFC).

The device works at a constant frequency in
discontinuous conduction mode to provide constant power to the output. It eliminates the need for
an opto-coupler, TL431 shunt regulator, or any
other type of secondary-side feedback device. It
operates from a wide input voltage range of
85VAC to 265VAC.

The ZSLS7031 integrates over-current and overvoltage protection, as well as a thermal shutdown
to halt the switching action in the event of abnormally high operating temperatures.




Available Support



High efficiency
Minimum bill of materials
Small form-factor package
No loop compensation required
Isolated and non-isolated applications




Evaluation Kit
Physical Characteristics
Benefits

Power factor PF > 0.95 depending on
application
Wide application input voltage range: 85V to
265VAC
Internal over-temperature protection
Output over-voltage protection (OVP)
Output over-current protection (OCP) on
primary side
Operating temperature:-45°C to 105°C
Maximum junction temperature: 150°C
Package: MSOP-8, RoHS-compliant
ZSLS7031 Typical Isolated Application
D4
LED+
+
TR
R5
C3
C6
85VAC to 265VAC
R8
LED1 to LEDn
Fuse
LED-
-
L
DB1 to DB4
R1
C1
R3
D1
D2
N
D3
IC1
1
2
3
R2
4
C2
Rset
ZSLS7031
VSINE
n.c.
FSET
GND
VCC
GATE
CS
FB
8
Q1
7
R6
6
5
C5
C4
R9
Rcs
R7
For more information, contact ZMDI via [email protected]
© 2013 Zentrum Mikroelektronik Dresden AG — Rev. 1.00 — May 7, 2013 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated,
stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
Circuit Block Diagram
Typical Applications

LED bulb lamps


LED tube lamps
General LED lighting
Ordering Information
Ordering Code
Description
Package
ZSLS7031ZI1R
ZSLS7031 Flyback LED Driver IC, MSOP-8
Tape on Reel
ZSLS7031KIT-D1
ZSLS7031PCB-D1 Evaluation Board, 5 ZSLS7031 ICs
Kit
Sales and Further Information
www.zmdi.com
[email protected]
Zentrum Mikroelektronik
Dresden AG
Global Headquarters
Grenzstrasse 28
01109 Dresden, Germany
ZMD America, Inc.
1525 McCarthy Blvd., #212
Milpitas, CA 95035-7453
USA
Central Office:
Phone +49.351.8822.0
Fax
+49.351.8822.600
USA Phone +855.275.9634
Phone +408.883.6310
Fax
+408.883.6358
European Technical Support
Phone +49.351.8822.7.772
Fax
+49.351.8822.87.772
DISCLAIMER: This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Zentrum Mikroelektronik Dresden AG (ZMD AG) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. The
information furnished hereby is believed to be true and accurate. However, under no circumstances shall ZMD AG be liable to any customer,
licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or nature whatsoever arising out of or
in any way related to the furnishing, performance, or use of this technical data. ZMD AG hereby expressly disclaims any liability of ZMD AG to any
customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liability of ZMD AG for
any damages in connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty,
tort (including negligence), strict liability, or otherwise.
European Sales (Stuttgart)
Phone +49.711.674517.55
Fax
+49.711.674517.87955
Zentrum Mikroelektronik
Dresden AG, Japan Office
2nd Floor, Shinbashi Tokyu Bldg.
4-21-3, Shinbashi, Minato-ku
Tokyo, 105-0004
Japan
ZMD FAR EAST, Ltd.
3F, No. 51, Sec. 2,
Keelung Road
11052 Taipei
Taiwan
Phone +81.3.6895.7410
Fax
+81.3.6895.7301
Phone +886.2.2377.8189
Fax
+886.2.2377.8199
Zentrum Mikroelektronik
Dresden AG, Korea Office
U-space 1 Building
11th Floor, Unit JA-1102
670 Sampyeong-dong
Bundang-gu, Seongnam-si
Gyeonggi-do, 463-400
Korea
Phone +82.31.950.7679
Fax
+82.504.841.3026
© 2013 Zentrum Mikroelektronik Dresden AG — Rev. 1.00 — May 7, 2013
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
Contents
1
2
3
IC Characteristics .......................................................................................................................................................... 6
1.1
Absolute Maximum/Minimum Ratings .................................................................................................................... 6
1.2
Operating Conditions ............................................................................................................................................. 6
1.3
Electrical Parameters ............................................................................................................................................. 7
1.4
Typical Performance Characteristics Graphs ......................................................................................................... 8
Circuit Description ....................................................................................................................................................... 10
2.1
ZSLS7031 Overview ............................................................................................................................................ 10
2.2
Startup Voltage .................................................................................................................................................... 10
2.3
Soft Start Control ................................................................................................................................................. 10
2.4
Gate Output Voltage Clamp ................................................................................................................................. 11
2.5
VSINE Detection Network and Active PFC ............................................................................................................. 11
2.6
Operating Frequency ........................................................................................................................................... 12
2.7
Output Over-Voltage Protection ........................................................................................................................... 13
2.8
Output Over-Current Protection (OCP) ................................................................................................................ 13
2.9
Under-Voltage Lock Out (UVLO) ......................................................................................................................... 13
Application Circuit Design ........................................................................................................................................... 14
3.1
Typical Applications ............................................................................................................................................. 14
3.2
Line Regulation Compensation Design ................................................................................................................ 14
3.3
Transformer Design ............................................................................................................................................. 14
3.4
Printed Circuit Board (PCB) Design Considerations ............................................................................................ 17
4
ESD Protection ............................................................................................................................................................ 19
5
Pin Configuration and Package ................................................................................................................................... 19
6
Glossary ...................................................................................................................................................................... 20
7
Ordering Information ................................................................................................................................................... 21
8
Document Revision History ......................................................................................................................................... 21
List of Figures
Figure 1.1
VIN vs. PF (Output: VOUT=40V, IOUT=0.45A) .................................................................................................... 8
Figure 1.2
VIN vs. IOUT (Output: target IOUT=0.45A, VOUT=40V, without line compensation circuit) ................................... 8
Figure 1.3
VIN vs. Efficiency (Output: VOUT=40V, IOUT=0.45A) ......................................................................................... 8
Figure 1.4
VIN vs. IOUT (Output: target IOUT=0.45A, VOUT=40V, with line compensation circuit) ........................................ 8
Figure 1.5
THD of VIN=110V (Output: VOUT=40V, IOUT=0.45A) ........................................................................................ 9
Figure 1.6
THD of VIN=230V (Output: VOUT=40V, IOUT=0.45A) ........................................................................................ 9
Figure 2.1
ZSLS7031 Block Diagram ............................................................................................................................ 10
Figure 2.2
ZSLS7031 Soft Start .................................................................................................................................... 11
Data Sheet
May 7, 2013
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
4 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
Figure 2.3
Active PFC ................................................................................................................................................... 12
Figure 2.4
Output Over-Voltage Protection ................................................................................................................... 13
Figure 2.5
Under-Voltage Lock Out ............................................................................................................................... 14
Figure 3.1
Typical Isolated Application Circuit ............................................................................................................... 15
Figure 3.2
Typical Non-Isolated Application Circuit ....................................................................................................... 16
Figure 3.3
ZSLS7031PCB-D1v1 Demonstration Board Layout ..................................................................................... 17
Figure 3.4
ZSLS7031PCB-D1v1 Demonstration Board Circuit ...................................................................................... 18
Figure 5.1
ZSLS7031 Pin Assignments Top View ......................................................................................................... 19
Figure 5.2
MSOP-8 Package Dimensions ..................................................................................................................... 20
List of Tables
Table 1.1
Absolute Maximum Ratings ............................................................................................................................ 6
Table 1.2
Operating Conditions ...................................................................................................................................... 6
Table 1.3
Electrical Parameters ..................................................................................................................................... 7
Table 5.1
Pin Description MSOP-8............................................................................................................................... 19
Data Sheet
May 7, 2013
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
5 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
1
IC Characteristics
Stresses beyond those listed under “Absolute Maximum/Minimum Ratings” (section 1.1) may cause permanent
damage to the device. These are stress ratings only, and functional operation of the device at these or any other
conditions beyond those recommended under “Operating Conditions” (section 1.2) is not implied. Exposure to
absolute maximum conditions for extended periods may affect device reliability.
1.1
Absolute Maximum/Minimum Ratings
Table 1.1
Absolute Maximum Ratings
No.
PARAMETER
SYMBOL
1.1.1
VCC to GND
1.1.2
VSINE, FSET, NC, CS, FB
1.1.3
VCC input current
1.1.4
ESD performance
1.1.5
Junction temperature
TjMAX
1.1.6
Storage temperature
TST
1.2
CONDITIONS
VCC
MIN
TYP
MAX
UNIT
-0.3
24
V
-0.3
5.5
V
10
mA
±2
kV
150
°C
150
°C
MAX
UNIT
ICC
Human Body Model (HBM)
based on MIL 883-H,
Method 3015.8
-65
Operating Conditions
Table 1.2
Operating Conditions
No.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
1.2.1
Operating temperature
TAMB
-45
105
°C
1.2.2
VCC voltage range
VCC
9
22
V
Data Sheet
May 7, 2013
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
6 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
1.3
Electrical Parameters
Except as noted, test conditions for the following specifications are VCC=16V, FB=0V, VSINE=2.5V, VCS=0V,
RSET=300kΩ, and TAMB = 25°C (typical).
Production testing of the chip is performed at 25°C unless otherwise stated. Functional operation of the chip and
specified parameters at other temperatures are guaranteed by design, characterization, and process control.
Table 1.3
Electrical Parameters
No.
PARAMETER
SYMBOL
1.3.1
VCC startup voltage threshold
VTH_S
1.3.2
VCC under-voltage threshold
VTH_D
1.3.3
GATE output voltage clamp
value
1.3.4
Quiescent Supply Current
ICC
Not switching
800
1.3.5
Startup current
IST
VCC < Vth_s
60
80
μA
1.3.6
Primary peak current control
threshold voltage
VCS
0.5
0.51
V
1.3.7
Blanking time
500
800
ns
1.3.8
Rise time
tRISE
0V to 7V, 1nF capacitor
from GATE to GND
100
120
ns
1.3.9
Fall time
tFALL
VCC = 16V, 1nF capacitor
from GATE to GND
50
80
ns
1.3.10
OVP rising voltage threshold
of FB
VOVP_H
1.2
1.25
1.3
V
1.3.11
OVP falling voltage threshold
of FB
VOVP_L
0.95
1.0
1.05
V
1.3.12
Operating frequency
RSET = 300kΩ
49
50
51
kHz
1.3.13
CS over-current protection
delay
tOCP
f = 50 kHz
500
600
750
μs
1.3.14
CS over-current protection
threshold
VOCP_TH
f = 50 kHz
0.65
0.70
0.75
V
Data Sheet
May 7, 2013
VGATEclp
CONDITIONS
MIN
TYP
MAX
UNIT
VCC rising
14.5
16
17.5
V
VCC falling
7
8
9
V
VCC rising to 22V
15
17.5
19
V
0.49
tBLANK
f
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
μA
7 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
1.4
Typical Performance Characteristics Graphs
Figure 1.1 VIN vs. PF (Output: VOUT=40V, IOUT=0.45A)
Figure 1.2 VIN vs. IOUT (Output: target IOUT=0.45A,
VOUT=40V, without line compensation
circuit)
Figure 1.3 VIN vs. Efficiency (Output: VOUT=40V,
IOUT=0.45A)
Figure 1.4 VIN vs. IOUT (Output: target IOUT=0.45A,
VOUT=40V, with line compensation circuit)
Data Sheet
May 7, 2013
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
8 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
Figure 1.5 THD of VIN=110V (Output: VOUT=40V,
IOUT=0.45A)
IEC 61000-3-2 2001
Test result
Data Sheet
May 7, 2013
Figure 1.6 THD of VIN=230V (Output: VOUT=40V,
IOUT=0.45A)
IEC 61000-3-2 2001
Test result
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
9 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
2
Circuit Description
Refer to the basic application circuit shown on page 2 for the external components referenced in the following
sections.
2.1
ZSLS7031 Overview
The ZSLS7031 consists of the basic functional blocks shown in Figure 2.1.
Figure 2.1
2.2
ZSLS7031 Block Diagram
Startup Voltage
After power is applied to the circuit, R3 provides a trickle current to allow C4 to begin charging. The ZSLS7031
starts functioning when the voltage across C4 reaches the startup threshold VTH_S, which is approximately 16.5V
(see specification 1.3.1).
The value of R3 and C4 can be determined by the input voltage. Choosing a larger value of R3 increases the
startup time but reduces the losses after the circuit is running. A low ESR capacitor of 2.2µF rated for 25V is
recommended for C4.
2.3
Soft Start Control
When the ZSLS7031 is initially powered up, the internal automatic gain control (AGC) output is at the minimum
value, so the peak CS threshold is initially much less than 0.5V. The AGC steps up cycle-by-cycle until the CS
threshold at the peak of the input sine wave is equal to 0.5V. With this technique, it will take several cycles of the
AC waveform for the final value of current to be attained, as shown in Figure 2.2.
Data Sheet
May 7, 2013
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
10 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
Figure 2.2
2.4
ZSLS7031 Soft Start
Gate Output Voltage Clamp
ZSLS7031 provides the voltage clamp for the GATE output. When the voltage at VCC is smaller than the VGATEclp
threshold (see specification 1.3.3), the output high voltage of the GATE output is approximately VCC. When the
voltage of VCC is greater than the VGATEclp threshold, the output high voltage of GATE is limited to the VGATEclp
threshold.
2.5
VSINE Detection Network and Active PFC
The voltage VSINE at the VSINE pin is used to control the waveform of the input current to ensure that it follows the
input voltage waveform, VBULK, to achieve a high power factor (PF) and low total harmonic distortion (THD) performance, as demonstrated in Figure 2.3.
Data Sheet
May 7, 2013
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
11 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
Figure 2.3
Active PFC
VSINE is used to detect the input voltage that controls the peak current waveform in the primary inductor. An
integrated AGC ensures that the peak current of the inductor remains constant with changing input voltage. This
allows the ZSLS7031 to actively correct the power factor while maintaining a constant power output during
operation. The resistor network connected to VSINE should be computed so that the peak input voltage condition
corresponds to ~2.4VDC. For example, for 265VAC, the peak voltage is 374.7V. At 374.7V input, the output of the
network should be 2.4V; therefore values of R1=1.86M and R2 = 12k are appropriate. Precision resistors of 1%
tolerance or better must be used. A small capacitor, C2, is used to filter high frequency noise that may couple to
the VSINE pin.
2.6
Operating Frequency
The operating frequency is set by connecting a resistor between the FSET pin and ground. The relationship
between the frequency and resistance is given in equation (1).
f kHz 
Data Sheet
May 7, 2013
15  103
RSET k
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
(1)
12 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
2.7
Output Over-Voltage Protection
Over-voltage protection of the output (OVP) is achieved by connecting a resistor network from the auxiliary
winding to the FB pin. By sensing the voltage of the auxiliary winding, which is proportional to the output voltage,
the ZSLS7031 detects when there is an open circuit condition on the secondary side and consequently reduces
the switching action to a minimum burst mode. The threshold voltage for the FB pin is typically 1.25V. Care must
be taken that the high ripple current bursts do not lead to an overshoot of the output capacitor’s rated voltage.
This can be accomplished by a Zener diode in parallel, rated slightly lower than the output capacitor’s nominal
voltage or a reasonable discharge resistor. The ZSLS7031 will recover to normal operation when the open-circuit
condition has been corrected.
Figure 2.4
2.8
Output Over-Voltage Protection
Output Over-Current Protection (OCP)
If the output of the circuit is suddenly shorted, the resulting over-current condition is detected on the primary side
and the converter will shut off for 30 cycles when the over-current comparator has switched after time tblank (see
specification 1.3.7) has elapsed.
2.9
Under-Voltage Lock Out (UVLO)
If the input voltage on the VCC pin falls below the under-voltage threshold VTH_D (see specification 1.3.2), the
under voltage lock out (UVLO) will be triggered. In this event, the device will stop operating until the VCC voltage
rises above the startup threshold VTH_S (see specification 1.3.1), at which point the device will start again.
Data Sheet
May 7, 2013
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
13 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
Figure 2.5
3
Under-Voltage Lock Out
Application Circuit Design
3.1
Typical Applications
The typical application circuits shown on the following pages are designed for a wide input voltage range 85VAC
to 265VAC.
3.2
Line Regulation Compensation Design
The output power of the ZSLS7031 varies slightly with input voltage due to the small delay associated with the
current-sense control loop. At high input voltages, the slope of the input current is quite steep, and therefore it will
overshoot the target value by more than it would at low input voltage conditions. Therefore, under wide input
voltage conditions, and without additional compensation, the output power varies over the full input voltage range,
85VAC to 265VAC, by about +/-5%. To further improve the line regulation, a simple compensation circuit can be
added as shown in Figure 3.1 and Figure 3.2 with components R4, R12, R13, R14, R15, and C9.
3.3
Transformer Design
The transformer design is described in a separate application note ZSLS7031_AN_TransformerDesign.pdf supported by a calculation spreadsheet.
Data Sheet
May 7, 2013
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
14 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
+
Rcs
Q1
FB
5
GND
CS
FSET
L2
+
Data Sheet
May 7, 2013
N
85VAC to 265VAC
L
Fuse
MOV
CX1
L1
R10
CX2
L3
DB1 to DB4
-
R11
C1
C2
R1
R2
C9
R15
R14
R12
R13
R4
3
4
6
7
GATE
VCC
VSINE
n.c.
2
8
1
IC1
ZSLS7031
R3
C4
D3
R16
R9
D5
R5
C3
D1
R6
R7
C5
D2
TR
CY
D4
R17
C8
C7
C6
R8
LED-
LED1 to LEDn
Typical Isolated Application Circuit
LED+
Figure 3.1
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
15 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
C7
C6
R8
LED+
LED1 to LEDn1
Typical Non-Isolated Application Circuit
LED-
Figure 3.2
Rcs
Q1
5
FB
GND
L2
+
May 7, 2013
N
85VAC to 265VAC
L
Fuse
MOV
CX1
L1
R10
CX2
L3
DB1 to DB4
-
R11
C1
C2
R1
R2
C9
R15
R14
R12
R13
R4
4
6
CS
GATE
FSET
n.c.
3
VCC
VSINE
7
2
8
1
IC1
ZSLS7031
R3
C4
D3
R16
R9
D5
R5
C3
D1
R6
R7
C5
D2
TR1
D4
+
Data Sheet
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
16 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
3.4
Printed Circuit Board (PCB) Design Considerations
The guidelines in this section are strongly recommended when laying out application circuits. As for all switching
power supplies, especially those providing high current and using high switching frequencies, layout is an important design step. If the layout is not well-designed, the regulator could show instability as well as EMI problems.
For additional information, refer to the ZMDI application note PCB Layout Design Guidelines for LED Driver
Circuits available at www.zmdi.com/products/led-drivers/.
Components such as R4, RCS, R6, R7, R2, C2, C5, etc., that are connected to the ZSLS7031 as well as the
bypass capacitors should be mounted as close to the ZSLS7031 as possible.
Switching signal traces should be kept as short as possible and not be routed in parallel to one another so as to
prevent coupling. Power ground and signal ground should be separated, and the traces of power ground should
be kept as short as possible.
Figure 3.3 shows, as an example, the layout of the ZSLS7031 Demonstration Board comprising a 20W isolated
flyback design on a 28mm x 71mm PCB area. Note: This board’s component labels are different from those in
previous schematics and equations. Figure 3.4 shows the corresponding circuit diagram.
Figure 3.3
Data Sheet
May 7, 2013
ZSLS7031PCB-D1v1 Demonstration Board Layout
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
17 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
ZSLS7031PCB-D1v1 Demonstration Board Circuit
+ C4
330u
n.p.
+ C3
330u
R1
CY
C10
R23
10k
R22
220k
R21
1R3
R24
1R
Q1
IPP60R950
D4
D3
R20
1R21
D2
C9
5
FB
GND
R17
240k
R19
20k
7
6
CS
GATE
n.c.
FSET
4
3
2
R15
1M2
8
VCC
1
VSINE
ZSLS7031
U1
C8
1u
1n
0.1u
R18
13k
R9
910k
C7
R16
68k
R11
910k
10u
R10
180k
10R
R14
47R
R12
1n
R3
150k
C2
R6
180k
R7
910k
R5
910k
C6
DB1 to DB4
3m
L1
Data Sheet
May 7, 2013
R13
L3
4k7
0.1u
0.1u
1AT
N
85VAC to 265VAC
J1
L
F1
MOV
3m
CX2
CX1
L2
3m
R2
4k7
-
+
R4
4k7
1u
6
D5 5
1
3
4
TR
8
10
PQ20/16 custom
D1
n.p.
C1
C5
n.p.
R8
n.p.
LED-
LED+
J2
Figure 3.4
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
18 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
4
ESD Protection
All pins have an ESD protection of  ±2000V according to the Human Body Model (HBM). The ESD test follows
the Human Body Model based on MIL 883-H, Method 3015.8.
5
Pin Configuration and Package
Figure 5.1
ZSLS7031 Pin Assignments Top View
1 VSINE
2 n.c.
Table 5.1
VCC 8
GATE 7
3 FSET
CS 6
4 GND
FB 5
Pin Description MSOP-8
Pin Name
NO.
VSINE
1
Line voltage sense input required for PFC.
NC
2
Not connected. Leave floating in the application.
FSET
3
Connect a resistor from this pin to GND to set the operating frequency.
GND
4
Ground. Common potential to all internal circuitry.
FB
5
Auxiliary winding voltage sensing pin for OVP.
CS
6
Primary winding peak current sensing input.
GATE
7
External power NMOS gate driving output.
VCC
8
Internal circuit power supply input.
Data Sheet
May 7, 2013
Description
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
19 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
Figure 5.2
6
MSOP-8 Package Dimensions
Glossary
Term
Description
AGC
Automatic Gain Control
LDO
Low Dropout (Regulator)
OCP
Over-Current Protection
OVP
Over-Voltage Protection
PF
Power Factor
PFC
Power Factor Correction
THD
Total Harmonic Distortion
UVLO
Under-Voltage Lock Out
Data Sheet
May 7, 2013
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
20 of 21
ZSLS7031
Isolated and Non-isolated Flyback LED Driver with Active PFC
7
Ordering Information
Ordering Code
Description
Package
ZSLS7031ZI1R
ZSLS7031 Flyback LED Driver IC, MSOP-8
Tape on Reel
ZSLS7031KIT-D1
ZSLS7031PCB-D1 Evaluation Board, 5 ZSLS7031 ICs
Kit
8
Document Revision History
Revision
Date
Description
1.00
May 7, 2013
First release.
Sales and Further Information
www.zmdi.com
[email protected]
Zentrum Mikroelektronik
Dresden AG
Global Headquarters
Grenzstrasse 28
01109 Dresden, Germany
ZMD America, Inc.
1525 McCarthy Blvd., #212
Milpitas, CA 95035-7453
USA
Central Office:
Phone +49.351.8822.0
Fax
+49.351.8822.600
USA Phone +855.275.9634
Phone +408.883.6310
Fax
+408.883.6358
European Technical Support
Phone +49.351.8822.7.772
Fax
+49.351.8822.87.772
DISCLAIMER: This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Zentrum Mikroelektronik Dresden AG (ZMD AG) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. The
information furnished hereby is believed to be true and accurate. However, under no circumstances shall ZMD AG be liable to any customer,
licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or nature whatsoever arising out of or
in any way related to the furnishing, performance, or use of this technical data. ZMD AG hereby expressly disclaims any liability of ZMD AG to any
customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liability of ZMD AG for
any damages in connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty,
tort (including negligence), strict liability, or otherwise.
European Sales (Stuttgart)
Phone +49.711.674517.55
Fax
+49.711.674517.87955
Data Sheet
May 7, 2013
Zentrum Mikroelektronik
Dresden AG, Japan Office
2nd Floor, Shinbashi Tokyu Bldg.
4-21-3, Shinbashi, Minato-ku
Tokyo, 105-0004
Japan
ZMD FAR EAST, Ltd.
3F, No. 51, Sec. 2,
Keelung Road
11052 Taipei
Taiwan
Phone +81.3.6895.7410
Fax
+81.3.6895.7301
Phone +886.2.2377.8189
Fax
+886.2.2377.8199
Zentrum Mikroelektronik
Dresden AG, Korea Office
U-space 1 Building
11th Floor, Unit JA-1102
670 Sampyeong-dong
Bundang-gu, Seongnam-si
Gyeonggi-do, 463-400
Korea
Phone +82.31.950.7679
Fax
+82.504.841.3026
© 2013 Zentrum Mikroelektronik Dresden AG — Rev.1.00
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
21 of 21