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PDF IPS401-05C-SO Data sheet ( Hoja de datos )
| Número de pieza | IPS401-05C-SO | |
| Descripción | High Brightness WHITE LED Controller | |
| Fabricantes | ASIC Advantage | |
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IN-PLUG® IPS401 Datasheet - Rev.11 - Universal WHITE LED Controller with 0.5V current FB voltage
IN-PLUG® series: IPS401
High Efficiency, High Power Factor, Universal
High Brightness WHITE LED Controller
INTRODUCTION
– REVISION 11 –
DESCRIPTION
The IPS401 is the world’s first White LED controller
capable of driving one or more strings of up to 120
LEDs in series with high efficiency and power factor
correction. The IPS401 is the forerunner of a series of
Ics which will provide a means of implementing high
efficiency, long life, and reliable lighting systems for
public buildings, industry, homes, transportation
systems and secure installations. It is also the ultimate
solution for RGB backlighting, flat panel display
backlighting and automotive long life lighting and
energy saving requirements. Safety features of the
IPS401 include over voltage and over current
protection.
A host of novel features such as self-oscillating and
continuous mode of operation, PFC capability
together with exceptionally low power dissipation
make the IPS401 a truly breakthrough product which
will establish standards for future “green” lighting
technology.
In addition to the compliance with power factor and
line harmonics regulations, using a PFC offers other
advantages like:
• Reducing the utility bill by making the actual
power drawn from the line almost equal to the
apparent power paid to the utility company
• Allowing more power to be drawn from the wall
outlet or line circuit breaker without exceeding
the limits set by UL or other safety agencies.
ORDERING INFORMATION
Part No.
ROHS/ Package
Temperature Range
Pb-Free
IPS401-05C-D -G-LF 8-Pin PDIP 0°C, +70°C
IPS401-05I-D -G-LF 8-Pin PDIP -40°C, +85°C
IPS401-05C-SO -G-LF 8-Pin SOIC 0°C, +70°C
IPS401-05I-SO -G-LF 8-Pin SOIC -40°C, +85°C
For detailed ordering information, see page 17
Commercial
Industrial
Commercial
Industrial
FEATURES
• Unique self oscillating with optimized PFC
controller able to drive hundreds of white LED
diodes, typically 120 to 1,000 from an AC source,
10 to several hundreds from a DC source.
• 12VDC to 265V AC sources and beyond
• Constant current LED operation for maximum
LED brightness, maximum life and reliability
• Built-in multiplier supports near unity power
factor and low harmonic distortion
• High-efficiency > 95% to save power and reduce
heat dissipation
• Self oscillating with jitter and optimum
continuous current mode to reduce harmonics,
improve EMI and efficiency
• LED current control and overvoltage protection
• LED intensity is application programmable or
dimmable
• Minimum design cycle with low component count
solutions
• No need for electrolytic capacitors in most
applications.
APPLICATIONS
• AC/DC LED Driver Applications
• DC/DC LED Driver Applications
• RGB backlighting
• Backlighting of LCD and PDP panels
• LED signs
• LED decoration
• Automotive applications
• Road signs, traffic lights
PIN CONFIGURATION: DIP-8 / SOIC-8
GND
IS
GDRIVE
VLINE
18
IPS401
45
BYPASS
COMP
LEDSENSE
VCC
© Copyright 2005-2007 - ASIC Advantage, Inc. – All rights reserved - Revision 11 – April 02, 2007
1 / 18
1 page  
IN-PLUG® IPS401 Datasheet - Rev.11 - Universal WHITE LED Controller with 0.5V current FB voltage
- P-channel Ron:
30 Ω typical
- N-channel Ron:
20 Ω typical
A series resistor R3 on pin3 should be added to further reduce EMI and minimize the noise injection which could
result from Miller-capacitance kick-back during transient conditions.
Examples of suitable MOSFETS:
- IXYS PolarHT™ and Polar HV™ MOSFET series: IXTY1R4N60P, IXTY2N60P, IXTY3N60P
- Fairchild MOSFET series: FQPF1N60, FQPF 2N60, FQPF 3N60.
- Infineon COOLMOSTM series: SPD01N60S5, SPD02N60S5, SPD03N60S5.
- Motorola MOSFET series: MTP1N60, MTP2N60, MTP3N60.
- SGS-Thomson MOSFET series: STD1NB60, STD2NB60, STD3NB60. Etc…
Note: Due to the rapid evolution of MOSFET technologies, please check for current models when designing a new
SMPS.
PolarHT™ and Polar HV™ are trademarks of IXYS corporation. COOLMOSTM is a trademark of Infineon.
Thermal shutdown:
An internal temperature sensing protection circuit disables the MOSFET gate drive when the temperature exceeds a
typical value of 150°C. This circuit has sufficient hysteresis to prevent relaxation. Normal operations therefore only
resume when the junction temperature has dropped below approximately 120°C.
Shunt bandgap regulator:
The IPS401 internal trimmed bandgap shunt regulator behaves like a 10V zener but also provides the 0.50V
reference for the voltage error amplifier, and the various internal bias current and voltages required by the different
blocks.
During start-up, the current consumption in the regulator is very low, typically 100μA, allowing many possible
schemes to power the IPS401. Once the “zener” value is reached, the MOSFET gate drive is enabled and normal
operation starts. When enabled, the typical chip consumption is 660 μA plus the current necessary to drive the
MOSFET which depends on the MOSFET’s total gate charge and the frequency of operation (linked to L1
inductance value).
The VCC voltage is allowed to drop below the “zener” value during normal operations but the circuit will reset itself
and re-enter start-up mode should the VCC drop below approximately 8 volts.
The shunt regulator is sized to handle up to 50mA, which is especially useful to power the IPS401 with few
components only. Be careful however not to exceed the package rated power dissipation (see table p7).
ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATING
Characteristics
Shunt regulator max ICC non-repetitive current (pin 5)
- see fig 7-
Peak drive output current (pin7)
Isense input voltage (pin 2)
VLINE maximum input current (pin4)
Junction to case thermal resistance RθJ-C
Junction to PCB thermal resistance RθJ-A
Power dissipation for TA <= 70°C
Operating junction temperature
Storage temperature range
Lead temperature (3 mm from case for 5 sec.)
Value
60
Source=100, Sink=200
0 / - 10
700
PDIL = 42, SOIC = 45
PDIL = 125, SOIC =155
PDIL = 640, SOIC = 500
- 40 to 150
- 55 to 150
260
UNITS
mA
mA
V
μA
°C / W
mW
°C
© Copyright 2005-2007 - ASIC Advantage, Inc. – All rights reserved - Revision 11 – April 02, 2007
5 / 18
5 Page 
IN-PLUG® IPS401 Datasheet - Rev.11 - Universal WHITE LED Controller with 0.5V current FB voltage
Isolated PWM dimming
An optoisolator and two resistors connected as shown below would bring very good results. R10 resistor value must
be selected, chosen to limit the input current to a reasonable value, 24Kohm seems very reasonable. R11 resistor
value is selected to achieve 100% dimming. This resistor value would be in the range of 50K to 100K. Any
application using this approach will need to test that there not an on-off blinking problem due to the chip power being
too low when the LEDs are off.
Isolated
PWM dimming
Input
R10
24k
U1
OPTO-NPN
R11
82k
to IPS401 VCC
to LEDSNS
Typical dimming frequency range 50Hz – 500Hz
Other Application Suggestions
SELECTION OF THE SUITABLE TOPOLOGY: BOOST vs FLYBACK
To make a decision, the user will have to consider the following requirements:
- Number of LEDs per string (Number of LEDs x threshold voltage of each LED)
- Input peak voltage (Peak rectified AC)
- Dimming requirement (Full dimming may require the output voltage to be below the peak input voltage)
The boost topology is the solution of choice for applications when the output DC voltage always remains above the
peak input DC voltage and avoids the direct conduction of D6 (see Fig. 1 or Fig.13). It is the preferred solution for
simplicity, efficiency and cost effectiveness.
The Flyback topology is the solution of choice when the DC output voltage needs to be below the peak input voltage.
(See Fig. 2). For more details please refer to application note AN-IPS-07 “Flyback Topology IPS401 LED Controller
Provides High Power Factor, Low In Rush Current and Good Efficiency”.
INPUT CAPACITANCE
In order to have a good power factor, the rectified input voltage needs to follow the line voltage closely. The C3
capacitor shown in the application circuit is a small value, present only for EMI reasons. A rule of 0.01uF/Watt is
suggested to correctly size C3.
OUTPUT CAPACITANCE
The output capacitor C7 helps to maintain constant LED brightness. The suggested value is 0.1 uF per watt (i.e. for a
60 watt application, 6.8 uF would be a good starting point in the design). If good Power Factor Correction is required,
up to 1uF/watt should be anticipated.
INDUCTOR SIZING
The rising and falling ramp of inductor current to a first approximation is given by the following equations, where Vin is
the instantaneous input voltage, L is the boost inductor value, Vo is the output voltage, and Ipk is the peak inductor
current:
I(t) = Vin x t / L
[FET on]
I(t) = -(Vout – Vin) x t / L [FET off]
The on and off times for the switch are therefore:
© Copyright 2005-2007 - ASIC Advantage, Inc. – All rights reserved - Revision 11 – April 02, 2007
11 / 18
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